KR101025564B1 - Radiator and LED Lighting Apparatus Using the Same - Google Patents

Abstract

The present invention can reduce the production cost because the manufacturing process is simple, and can effectively release heat while arranging the driving device on the back of the LED substrate equipped with a plurality of high-brightness LED, the heat radiation fins inside and outside the hollow body The present invention relates to a heat dissipation unit and an LED lighting device using the same, wherein the opening is formed in the body to effectively dissipate heat to the outside by simultaneously using conduction and convection.

The heat dissipation unit for the LED lighting device is characterized in that it comprises a truncated conical or cylindrical body having a hollow portion, and heat dissipation fins spirally formed on the outer and / or surface of the body. In addition, the body may further include a plurality of openings through the body to allow convection of air.

Lighting device, LED, radiator, spiral, incandescent lamp

Description

Radiator and LED lighting device using the same {Radiator and LED Lighting Apparatus Using the Same}

The present invention relates to a heat dissipation unit and an LED lighting device using the same, and more particularly, to effectively radiate heat generated inside a light bulb using a plurality of high-brightness light emitting diodes (LEDs) as a light source to the outside. It relates to a heat dissipation unit and the LED lighting device using the same that can prevent the emission characteristics and life of the degradation.

Generally, in order to use the LED as a white light source for lighting, it emits white light by the three source light of the LED package in which the red, green, and blue LEDs are packaged as one (in this case, each LED It is necessary to precisely adjust the voltage and current applied to the light so that the illumination of each light is uniform.), And the light emitted from the blue or yellow LED is passed through the yellow or blue phosphor so that the short wavelength is changed into the light of various long wavelengths. Thus, a pseudo white is obtained, or a near-ultraviolet ray passes through the phosphor and emits white like a fluorescent lamp.

In general, LED packages with high illumination require high power, as the emitter chip is large, unlike traditional LED packages. An example of such high-light LED packages is the Luxeon ^TM Emitter Assembly LED package, which General Electric developed to replace the LED screw-type incandescent lamp. This Luxeon Emitter Assembly LED package generates higher brightness than conventional LEDs, but generates a lot of heat, so the emitter chip is very at risk of being damaged if it does not dissipate heat effectively.

In general, Luxeon LED packages dissipate the heat generated by joining a plate of metal.The Luxeon LED package uses a separate process by machining or die-casting the metal to integrate the circuit board for driving. By assembling the circuit components to be adjacent to the LED package and installing a separate metal mesh, the heat dissipation effect is improved by dissipating heat generated effectively.

However, the above-mentioned Luxion LED package is too large in size and heavy in weight compared to a screw cap type incandescent lamp generally used. In addition, the above-described Luxion LED package has to form a groove in the plate board to install a net for dissipating generated heat, and the mesh must be bonded to the groove, which not only increases the production cost but also the process is very complicated. .

Therefore, a package for solving the above-mentioned problems of the luxion LED package is disclosed in Korean Patent Laid-Open Publication No. 2008-2836 (name of the invention: high-power LED lighting equipment having high heat dissipation).

The package is intended for packaging high power LEDs and includes a number of heat dissipation fins that surround the housing for application to battery powered portable lamps. The plurality of heat dissipation fins effectively dissipates heat generated in the LED package. In addition, when there is a lot of heat generated from the LED package, a cooling fan may be installed on the side of the battery. In the LED package, the means for transferring heat while fixing the cooling fins is constituted by a hollow chamber, and the working fluid is located inside the chamber.

In the LED package of the above-described configuration, when one end of the empty chamber is heated, the working fluid absorbs the heat, vaporizes the vapor, and the generated steam transfers heat to a heat dissipation fin mounted around the outside of the chamber. Thereby, the heat dissipation pin dissipates the transferred heat out of the LED package. The steam, which transfers heat to the heat dissipation fins, acts as a kind of heat pipe, a thermal cycle that cools, condenses into a working fluid in the liquid state, and returns to the heated end of the chamber.

However, the LED package of the above-described configuration has a structure such as a heat pipe, in which a heat dissipation of heat generated to the outside is a thermal cycle, but it is possible to reduce the size, but the manufacturing process is complicated and the production cost is increased. There was a problem of using a working fluid.

In addition, a configuration for manufacturing a light bulb using high-light LED is disclosed in Japanese Patent Laid-Open Publication No. 2005-84731 (name of the invention: a light bulb using a high output white light emitting diode).

In the light bulb, the LED substrate and the driving circuit were separated at regular intervals. The reason is that when the high power white light emitting diode and the driving elements are mounted together on one substrate, the driving element may not work properly due to the heat generated from the high power white light emitting diode. In the above, it is preferable to form the LED substrate as a metal, and the LED substrate is bonded and fixed to the outer case so as to discharge heat through the case. In addition, one more heat dissipation sheet was mounted adjacent to the LED substrate in order to further protect the driving element from heat generated in the high power white light emitting diode.

However, the above-described configuration is not only very different from the conventional screw cap type bulb, but also has a narrow viewing angle because the LED package is emitted inside the cylindrical case and the light is emitted through the lens located at the cylindrical end.

Accordingly, an object of the present invention is to provide a spiral heat dissipation unit and a LED lighting device using the same, which can reduce the production cost by a simple manufacturing process.

Another object of the present invention is to provide an LED lighting device using a spiral heat dissipation unit that can effectively dissipate heat while arranging a driving device on a rear surface of an LED substrate equipped with a plurality of high brightness LEDs.

Still another object of the present invention is to provide a spiral heat dissipation unit in which a heat dissipation fin is formed inside and outside the hollow body and an opening is formed in the body to effectively dissipate heat to the outside by using conduction and convection simultaneously.

According to one aspect of the invention, the present invention provides a plurality of LED module is mounted on one surface of the metal circuit board; A driving circuit module disposed on the other surface of the metal circuit board and having a driving circuit for driving the plurality of LEDs; One end portion is coupled to the metal circuit board of the LED module so that the driving circuit module is accommodated in the hemispherical inner space, and has a plurality of first openings through which heat generated from the plurality of LEDs is dissipated to the outside by conduction and convection. With the upper hemisphere; A screw cap coupled to one end of the upper hemisphere and to which an external power source for driving the plurality of LEDs is applied; A lower hemisphere combined with the upper hemisphere to form a light bulb shape in which the LED module is embedded and formed in a transparent or semi-transparent hemisphere shape; It is formed from the plurality of LEDs and the driving circuit module by having a spiral first heat dissipation pin on the outer surface of the body of the truncated conical shape disposed in the space formed by the upper hemisphere, the hollow portion in the center of the drive circuit module It provides an LED lighting device comprising; and a heat dissipation unit for dissipating heat to the outside through the upper hemisphere and the plurality of first openings by conduction and convection.

According to another feature of the present invention, the present invention provides a light emitting device comprising: an LED module having a plurality of LEDs mounted on one surface of a metal circuit board; A heat transfer member supporting one side of the LED module while being in contact with the other side of the metal circuit board of the LED module and transferring heat generated from the plurality of LEDs to the other side by conduction; A driving circuit module disposed on the other surface of the heat transfer member and having a driving circuit for driving the plurality of LEDs; An upper hemisphere having a plurality of first openings whose one end is coupled to the heat transfer member so that the driving circuit module is accommodated in a hemispherical inner space and heat generated from the plurality of LEDs is radiated to the outside by conduction and convection; A screw cap coupled to one end of the upper hemisphere and receiving power for driving the plurality of LEDs; A lower hemisphere, one end of which is combined with the heat transfer member to form a light bulb shape incorporating the LED module together with the upper hemisphere and is formed in a transparent or translucent hemisphere shape; It is formed from the plurality of LEDs and the driving circuit module by having a spiral first heat dissipation pin on the outer surface of the body of the truncated conical shape disposed in the space formed by the upper hemisphere, the hollow portion in the center of the drive circuit module It provides an LED lighting device comprising; and a heat dissipation unit for dissipating heat to the outside through the upper hemisphere and the plurality of first openings by conduction and convection.

According to another feature of the present invention, the present invention provides a light emitting device comprising: an LED module in which a plurality of LEDs are mounted on one surface of a metal circuit board; A driving circuit module disposed on the other surface of the metal circuit board and having a driving circuit for driving the plurality of LEDs; One end portion is coupled to the metal circuit board of the LED module so that the driving circuit module is accommodated in the hemispherical inner space, and has a plurality of first openings through which heat generated from the plurality of LEDs is dissipated to the outside by conduction and convection. With the upper hemisphere; A screw cap coupled to one end of the upper hemisphere and to which an external power source for driving the plurality of LEDs is applied; A lower hemisphere combined with the upper hemisphere to form a light bulb shape in which the LED module is embedded and formed in a transparent or translucent hemisphere shape; Spiral first heat dissipation pins disposed in the space formed by the upper hemisphere and having one end coupled to the metal circuit board of the LED module, the other end contacting the upper hemisphere, and having a hollow formed at the center thereof. It is provided with, LED radiating device comprising; and a heat dissipation unit for dissipating heat generated from the plurality of LED and the driving circuit module to the outside through the upper hemisphere and the plurality of first openings by conduction and convection. .

The heat dissipation unit preferably further includes a spiral second heat dissipation fin inside the body.

In addition, the body of the heat dissipation unit may further include a plurality of second openings penetrating the body to allow the convection of air.

The circuit board may be formed of an insulated metal, and the insulated metal may include carbon nanotubes.

In addition, the upper hemisphere and the heat transfer member may be formed of copper, aluminum, magnesium, or an alloy thereof.

Further, the heat dissipation fin of the heat dissipation unit is formed by a form rolling method, and the heat dissipation unit is preferably formed of copper, aluminum, magnesium, or an alloy thereof. In addition, the heat dissipating unit is an LED lighting device containing 0.1 to 20 wt.% Of carbon nanotubes or carbon nanofibers.

The heat dissipation unit may be coupled to a space between the heat dissipation fins and the heat dissipation fins, and further include an auxiliary heat dissipation member made of a porous metal foam or a mesh, and between the heat dissipation unit and the sub heat dissipation member. Or it is preferable to further include a heat transfer member made of carbon fiber.

On the other hand, according to another feature of the present invention, the LED module is a plurality of LED mounted on one surface of the metal circuit board; A driving circuit module disposed on the other surface of the metal circuit board and having a driving circuit for driving the plurality of LEDs; One end portion is coupled to the metal circuit board of the LED module so that the driving circuit module is accommodated in the hemispherical inner space, and has a plurality of first openings through which heat generated from the plurality of LEDs is dissipated to the outside by conduction and convection. With the upper hemisphere; A screw cap coupled to one end of the upper hemisphere and to which an external power source for driving the plurality of LEDs is applied; A lower hemisphere combined with the upper hemisphere to form a light bulb shape in which the LED module is embedded and formed in a transparent or semi-transparent hemisphere shape; A cylindrical body disposed in a space formed by the upper hemisphere and having one end coupled to the metal circuit board of the LED module, the other end contacting the upper hemisphere, and having a hollow formed at the center thereof, and an adhesive layer interposed therebetween. And a heat dissipation unit having an auxiliary heat dissipation member coated to dissipate heat generated from the plurality of LEDs and the driving circuit module to the outside through the upper hemisphere and the plurality of first openings by conduction and convection. It provides an LED lighting device.

In this case, the auxiliary heat dissipating member may be composed of a thin plate of a mesh structure, or carbon nanofibers or carbon fibers in a sheet form.

In addition, the heat dissipation unit for LED lighting apparatus according to the present invention is characterized in that it comprises a cylindrical body having a hollow portion, and an auxiliary heat dissipating body coated with an adhesive layer on the outer surface of the body.

Furthermore, the heat dissipation unit for the LED lighting apparatus according to the present invention is characterized in that it comprises a truncated cone-shaped body having a hollow portion, and a first heat dissipation fin spirally formed on the outer surface of the body.

In addition, the heat dissipation unit for LED lighting apparatus according to the present invention is characterized in that it comprises a cylindrical body having a hollow portion, and the first heat dissipation fin formed spirally on the outer surface of the body.

In this case, the heat dissipation unit for the LED lighting device may further include a second heat dissipation fin formed integrally with the inner surface of the body in a spiral.

In addition, the body preferably further includes a plurality of openings through the body to allow convection of air.

Preferably, the body is formed of copper, aluminum, magnesium, or an alloy thereof.

The auxiliary heat dissipating body may be composed of a thin plate of a mesh structure, or carbon nanofibers or carbon fibers in a sheet form.

The heat dissipation pins of the body are formed by a form rolling method.

The heat dissipation unit for the LED lighting device is preferably coupled to the space between the heat dissipation fin and the heat dissipation fin and further comprises an auxiliary heat dissipation member made of a porous metal foam or mesh.

As described above, in the present invention, the manufacturing process can be simplified to reduce the production cost, and the heat can be effectively discharged while arranging the driving device on the rear surface of the LED substrate equipped with a plurality of high-brightness LEDs.

In addition, in the present invention, the heat dissipation fins are formed inside and outside the hollow body, and openings are formed in the body to effectively dissipate heat to the outside by simultaneously using conduction and convection.

In order to fully understand the present invention, the advantages of the operability of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of an LED lighting apparatus using a spiral heat dissipation unit according to a first embodiment of the present invention, Figure 2 is a perspective view showing the heat dissipation unit shown in FIG.

LED lighting device using a spiral heat dissipation unit according to the first embodiment of the present invention is a plurality of high-brightness LED (11) is preferably a LED module 15 mounted on one surface of a circuit board 13 made of metal, and The heat transfer member 20 supports the LED module 15 while the side is in contact with the circuit board 13 of the LED module 15 and transfers the heat generated from the plurality of LEDs 11 to the other side by conduction. And, the lower end is fixedly coupled to the heat transfer member 20 and installed to form a space therein and radiates heat generated by the plurality of LEDs 11 and transferred through the heat transfer member 20 to the outside by conduction and convection. An upper hemisphere 27 having a plurality of openings 29 and a lower hemisphere formed in a transparent or semi-transparent hemispherical shape in combination with the heat transfer member 20 to form a light bulb shape in which the LED module 15 is embedded ( 31, the upper hemisphere 27 and the heat transfer member 20 A driving circuit module 17 installed in a space formed by the circuit board and having a circuit for driving the plurality of LEDs 11 and fixed to an upper portion of the driving circuit module 17 and formed by the upper hemisphere 27. A heat dissipation part 24 disposed in the space and dissipating heat generated from the plurality of LEDs 11 and the driving circuit module 17 to the outside through the upper hemisphere 27 and the plurality of openings 29 by conduction and convection. ), And the outer circumferential portion is formed in a screw shape so as to be coupled to the upper end of the upper hemisphere 27 so as to be fitted into a screw type power socket, and apply power to the plurality of LEDs 11 (+) and (-). It includes a screw cap 33 formed with electrical contacts (33a, 33b).

The plurality of LEDs 11 constituting the LED module 15 generates white light of high brightness or the plurality of LEDs 11 are composed of blue or yellow LEDs and the light emitted from the LEDs is provided on the lower hemisphere 31. Pseudo-white can also be obtained by passing a yellow or blue phosphor that is coated or integrally formed so that the short wavelength is converted into light of various long wavelengths.

The circuit board 13 may be formed of a material having excellent thermal conductivity, for example, ceramic or insulated metal. As the insulated metal constituting the circuit board 13, copper, aluminum, magnesium, or the like, or an insulating layer (not shown) is formed on a plate made of an alloy thereof. Therefore, the circuit board 13 smoothly dissipates heat generated in the plurality of LEDs 11 through the heat transfer member 20 installed on the upper side thereof, thereby preventing the plurality of LEDs 11 from being deteriorated.

In addition, the circuit board 13 may include carbon nanotubes (CNT) to improve heat transfer characteristics and reduce weight. When the circuit board 13 is formed of a magnesium alloy containing carbon nanotubes, the weight of the circuit board 13 may be reduced by about 30% than that of aluminum.

The heat transfer member 20 preferably has a recess for accommodating the LED module 15 on a lower side thereof and supports the metal circuit board 13 of the LED module 15 in the recess. Accordingly, the metal circuit board 13 transfers heat generated by the plurality of LEDs 11 to the heat transfer member 20 by conduction while making surface contact with the heat transfer member 20.

The heat transfer member 20 may also be made of a material having excellent thermal conductivity, such as copper, aluminum, magnesium, or an alloy thereof, and having an anti-oxidation insulating layer (not shown) formed on the surface thereof. .

The upper hemisphere 27 is fixed using the heat transfer member 20 and the fixing screw 20a to form an inner space to accommodate the driving circuit module 17 and the heat dissipation part 24. The upper hemisphere 27 is made of a material having excellent thermal conductivity, for example, copper, aluminum or magnesium, or an alloy thereof, and a plurality of openings 29 are formed. Therefore, the upper hemisphere 27 radiates heat generated in the LED module 15 and the driving circuit module 17 to the outside by convection through the opening 29 as well as conduction. .

The heat dissipation part 24 has a body 19 made of a truncated conical shape having a hollow in the center, and a heat dissipation fin formed in a spiral shape on the outer circumference of the body 19 and integrally formed with the body 19 ( 21). The heat dissipation part 24 may form a spiral heat dissipation fin 21 by a form rolling method on the outer surface of the body 19, as shown in FIG.

Conventionally, when a plurality of heat dissipation fins in a simple plate-like form is laminated by extrusion or casting, it is impossible to form a thin film up to 0.2 mm, so that the contact area per unit area is low. However, in the present invention, it is possible to mold the fin to a thickness of 0.2 mm, so that the contact area per unit area can be maximized.

A plurality of heat dissipating fins can be manufactured by extrusion or casting method, but a general laminated structure in which a plurality of heat dissipating fins are sequentially stacked can be manufactured by extrusion or casting method. In the present invention, it is possible to form a spiral heat dissipation pin on the outer circumference of the body by using a rolling method used in the manufacture of a screw or the like.

In addition, as the upper end of the spiral heat dissipation fin 21 is assembled to make contact with the upper hemisphere 27, heat conduction through the upper hemisphere 27 may be achieved.

As described above, when the spiral heat dissipation fin 21 is provided, the heat dissipation area that can be in contact with the outside air is increased, as well as conduction of heat conducted at the lower side of the body 19 and conduction of convection by the outside air at the same time. While circulating along the helical heat dissipation fins 21, conduction and heat dissipation are rapidly conducted upwards.

That is, the heat dissipation fins 21 are formed in one spiral shape, but the blocking phenomenon does not occur when heat conduction or air flow is continuously performed from the lower side to the upper side, but a plurality of heat dissipation fins are sequentially spaced at intervals. In the general laminated structure formed by stacking a plurality of heat dissipating fins are not continuous, the conduction of heat along the plurality of heat dissipating fins is not made, and the flow of air is cut off and a blocking phenomenon occurs. Therefore, the spiral heat dissipation fin 21 structure of the present invention has a higher heat dissipation efficiency than the conventional laminated heat dissipation fin structure.

As a result, the heat dissipation part 24 having the hollow body 19 and the heat dissipation fins 21 has the heat generated when the LED module 15 and the driving circuit module 17 are driven toward the upper hemisphere 27. The transmission prevents the LED module 15 and the driving circuit module 17 from being deteriorated.

The heat dissipation part 24 is made of a material having excellent thermal conductivity, for example, copper, aluminum or magnesium, or an alloy thereof, and the heat dissipation part 24 is made of copper, aluminum or magnesium, or the like. To these alloys, nano-size carbon nanotubes or carbon nanofibers may be added as pigments to reduce the weight while improving the heat dissipation effect.

That is, the body 19 of the heat dissipation unit 24 is heat transfer by including about 0.1 to 20 wt.% Of nanoscale carbon nanotubes or carbon nanofibers in copper, aluminum, magnesium, or the like or alloys thereof. The weight can be reduced by about 20% while improving the properties to improve the heat dissipation effect. In particular, as the content of carbon nanotubes or carbon nanofibers increases, the melting point of the alloy increases. For example, the melting point of an aluminum alloy containing 10 wt.% Of carbon nanotubes or carbon nanofibers is 1000 ° C or higher. It is characterized by ultra-light, super heat and ultra high strength that can withstand temperatures much higher than the melting point of 600 ~ 700 ℃ of aluminum that does not contain them.

In addition, the heat dissipation part 24 has a plurality of openings 25 formed in the body 19. Therefore, the body 19 of the heat dissipation portion 24 not only conducts heat generated by the LED 11 but also convections toward the upper hemisphere 27 through the opening 25 to improve heat dissipation efficiency.

The driving circuit module 17 is formed of a circuit for driving a plurality of LEDs 11 constituting the LED module 15 and is separated from the LED module 15 to be disposed between the LED module 15 and the heat dissipation unit 24. Located.

The lower hemisphere 31 is to package the LED module 15 together with the upper hemisphere 27 and is formed in a transparent or semi-transparent hemisphere shape and is coupled to the lower end of the heat transfer member 20. The lower hemisphere 31 is composed of a plurality of LEDs 11 or blue or yellow LEDs to generate white light from the LED lighting device, and by using them pass through the yellow or blue phosphor formed in the lower hemisphere 31, the short wavelength is several It can be turned into long-wave light to obtain pseudo white.

To this end, the lower hemisphere 31 is formed of a yellow or blue phosphor or a polymer containing dye in the phosphor. In addition, the lower hemisphere 31 may include carbon nanotubes to dissipate heat generated from the LED 11 to the outside.

In the above, the lower hemisphere 31 includes phosphors containing phosphors or dyes in the manufacturing process, or is surface-treated with a solution or particles formed of dyes in the phosphors or phosphors after preparation. In this case, the carbon nanotube may be included in the above-described phosphor or a material including a suitable dye in the phosphor.

The LED lighting apparatus using the spiral heat dissipation unit having the above-described configuration generates and illuminates white light by applying power in a state where the screw cap 33 is inserted into a socket (not shown). That is, in the LED lighting device, when power is applied to the (+) and (-) contacts 33a and 33b of the screw cap 33, the driving circuit module 17 and the LED module 15 through the wires 32a and 32b. The power is applied to the LED 11 constituting the light emitting is made of high light. At this time, the generated blue or yellow light is emitted to the outside through the lower hemisphere 31 and the white light is irradiated.

The LED 11 is heat is generated when the power is applied to the light is generated, this heat deteriorates the LED 11 and the drive circuit module 17, the heat transfer member 20 and the heat radiating portion 24 In addition to conducting to the top of the upper hemisphere 27, heat in the hollow of the body 19 is convex and diverged through the plurality of first and second openings 19, 29.

In this case, the spiral heat dissipation fin 21 formed on the outside of the body 19 increases the heat dissipation area and at the same time, the heat generated from the body is transferred to the spiral heat dissipation fin 21 by the convection action, which is a natural flow of air. As it rises, effective heat dissipation is achieved.

3 is a cross-sectional view of the LED lighting apparatus using a spiral heat dissipation unit according to a second embodiment of the present invention, Figure 4 is a perspective view showing the heat dissipation unit shown in FIG.

The LED lighting apparatus according to the second exemplary embodiment of the present invention is the same as the LED lighting apparatus using the spiral radiating unit according to the first exemplary embodiment of the present invention except for the heat radiating unit 24. Therefore, the same reference numerals are assigned to the same components, and description thereof will be omitted.

As shown in FIG. 4, the heat dissipating part 24 according to the second exemplary embodiment has a spiral internal heat dissipation fin 23 as well as a spiral external heat dissipation fin 21 on the outer surface of the body 19. Is formed. The internal heat dissipation pin 23 increases the dissipation area of heat to increase the dissipation efficiency of heat inside the body 19. In addition, the inner heat dissipation pin 23 is also formed spirally by a form rolling method at the same time as the spiral outer heat dissipation pin 21 is formed outside the body 19, the top of the heat inside the body 19, That is, the cooling efficiency can be increased by transmitting toward the end of the upper hemisphere 27.

In this case, the spiral internal heat dissipation pin 23 formed inside the body 19 increases the heat dissipation area and at the same time the body 19 when heat generated therein is raised by convection action, which is a natural flow of air. As the air rotates along the inner wall of the vortex to give the air a chance to contact the heat radiating portion 24 it is possible to further enhance the heat dissipation effect.

Meanwhile, in the above-described first and second embodiments, the driving circuit module 17 is separated from the LED module 15 and positioned above the heat transfer member 20. However, as in the third embodiment shown in FIG. It is also possible to assemble the LED module 15 including the metal circuit board 13 on which a plurality of high-brightness LEDs 11 are mounted, omitting the heat transfer member 20, at the lower end of the heat dissipation unit 24.

In this case, the driving circuit module 17 may be installed on the upper surface of the metal circuit board 13 and positioned in the hollow part inside the body 19 of the heat dissipation part 24. In this case, the heat dissipation part 24 preferably forms a cylindrical shape instead of the truncated cone in consideration of the drive circuit module 17 being located in the hollow part inside the body 19.

As described above, when the driving circuit module 17 is located inside the body 19 of the heat dissipation unit 24, the separation distance from the heat dissipation fin 23 is shortened, thereby efficiently absorbing the heat generated and the internal heat dissipation fin 23. ) Increases the heat release efficiency due to convection.

6 is a perspective view of a heat dissipation unit 24 according to a fourth embodiment of the present invention, and FIG. 7 is a perspective view of the auxiliary heat dissipating element 35 shown in FIG. 6.

The spiral heat dissipation part 24 according to the fourth embodiment of the present invention further includes an auxiliary heat dissipating element 35 for increasing the heat dissipation surface area in order to improve the heat dissipation efficiency.

The auxiliary heat dissipating body 35 is inserted into and coupled to the groove between the heat dissipating fins 21 of the heat dissipating unit 24 of the first to third embodiments. That is, the auxiliary heat dissipating body 35 is rolled round a metal foam or mesh structure formed in a porous form in order to increase the heat dissipation surface area, and thus the outer surface of the body 19 of the heat dissipating unit 24, That is, the heat dissipation efficiency per unit area may be improved by coupling to the space between the heat dissipation fins 21 formed in a spiral shape. The metal foam is made of a material having excellent electrical conductivity, for example, aluminum, nickel or copper.

The auxiliary heat dissipating element 35 is spirally formed by rolling a metal foam or a mesh structure in which a product is formed into a porous form by forming or sintering a metal as shown in FIG. 7. In this case, it is also possible to form a plurality of through holes 35a in order to induce air flow in the vertical direction between the heat dissipation fins 21.

When the auxiliary heat dissipating body 35 is formed in a porous form by forming or sintering, the heat dissipating fins 21 formed on the outer surface of the body 19 are joined in both directions to be half in the longitudinal direction. Can be attached to space In this case, since the heat dissipation pin 21 has a spiral structure, the auxiliary heat dissipation body 35 is also formed spirally to be rotated and fastened.

The auxiliary heat dissipating body 35 having a helical structure in the above is coupled to the heat dissipating pins 21 of the body 19 without being disconnected and thus is not easily separated by an impact. In addition, the heat dissipation effect of the auxiliary heat dissipation member 35 wound around the heat dissipation pins 21 by winding the mesh structure in a spiral manner does not move between the heat dissipation pins 21 using a filler. Can improve.

8 is a partially cutaway perspective view of the heat dissipation unit 40 according to the fifth embodiment of the present invention.

The heat dissipation unit 40 according to the fifth embodiment of the present invention is formed on the outer surface of the cylindrical body 37 on which the heat dissipation fins are not formed, through the adhesive layer 39, the auxiliary heat dissipating body 41 made of porous and cylindrical shape. Install it.

The auxiliary heat dissipating member 41 is composed of a thin plate of a mesh structure or carbon nanofibers or carbon fibers in a sheet form, and the auxiliary heat dissipating body 41 is wound around the outer surface of the cylindrical body 37 Is installed. In addition, the adhesive layer 39 is made of a soldering material or a filler to increase the heat transfer efficiency by making good contact when the auxiliary heat dissipating element 41 is wound around the outer surface of the body 37 to be installed.

In addition, by adding to the outer surface of the adhesive layer 39 or by replacing the adhesive layer 39, it is possible to maximize the heat transfer by winding the carbon nanofibers or carbon fibers of the sheet form having excellent heat transfer characteristics. The carbon nanofibers or carbon fibers can maintain a certain thickness in the form of a sheet and have an elastic property such as a mat, and thus exhibit excellent heat transfer effects even when the workability of the interface is low. As a result, there is no need to increase the flatness of the interface, and the manufacturing process can be simplified.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The present invention can reduce the production cost because the manufacturing process is simple, and can effectively release heat while arranging the driving device on the back of the LED substrate equipped with a plurality of high-brightness LED, the heat radiation fins inside and outside the hollow body It is formed in the opening is formed in the body can be applied to the spiral radiator and the LED lighting device using the same that can effectively dissipate heat to the outside by using conduction and convection at the same time.

1 is a cross-sectional view of an LED lighting apparatus using a spiral heat dissipation unit according to a first embodiment of the present invention.

FIG. 2 is a perspective view illustrating the heat dissipation unit illustrated in FIG. 1. FIG.

3 is a cross-sectional view of the LED lighting apparatus using a spiral heat dissipation unit according to a second embodiment of the present invention.

4 is a perspective view of the heat dissipation unit shown in FIG. 3.

5 is a partial cutaway perspective view showing a combined state of the LED module and the heat dissipation unit according to a third embodiment of the present invention.

6 is a perspective view of a heat dissipation unit according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view of the auxiliary heat spreader shown in FIG. 6. FIG.

8 is a partial cutaway perspective view of a heat dissipation unit according to a fifth embodiment of the present invention;

* Explanation of Signs of Major Parts of Drawings *

11: LED 13: Circuit Board

15: LED module 17: drive circuit module

19, 37: body 20: heat transfer member

20a: set screw 21, 23: heat dissipation pin

24, 40: heat dissipation 25, 29: opening

27: upper hemisphere 31: handan hemisphere

32a, 32b: wire 33: screw cap

33a, 33b: contact 35, 41: auxiliary heat dissipator

35a: through hole 39: adhesive layer

Claims (25)

An LED module in which a plurality of LEDs are mounted on one surface of a metal circuit board; A driving circuit module disposed on the other surface of the metal circuit board and having a driving circuit for driving the plurality of LEDs; One end portion is coupled to the metal circuit board of the LED module so that the driving circuit module is accommodated in the hemispherical inner space, and has a plurality of first openings through which heat generated from the plurality of LEDs is dissipated to the outside by conduction and convection. With the upper hemisphere; A screw cap coupled to one end of the upper hemisphere and to which an external power source for driving the plurality of LEDs is applied; A lower hemisphere combined with the upper hemisphere to form a light bulb shape in which the LED module is embedded and formed in a transparent or semi-transparent hemisphere shape; It is formed from the plurality of LEDs and the driving circuit module by having a spiral first heat dissipation pin on the outer surface of the body of the truncated conical shape disposed in the space formed by the upper hemisphere, the hollow portion in the center of the drive circuit module A heat dissipation unit for dissipating heat to the outside through the upper hemisphere and the plurality of first openings by conduction and convection; LED lighting device comprising a. An LED module in which a plurality of LEDs are mounted on one surface of a metal circuit board; A heat transfer member supporting one side of the LED module while being in contact with the other side of the metal circuit board of the LED module and transferring heat generated from the plurality of LEDs to the other side by conduction; A driving circuit module disposed on the other surface of the heat transfer member and having a driving circuit for driving the plurality of LEDs; An upper hemisphere having a plurality of first openings whose one end is coupled to the heat transfer member so that the driving circuit module is accommodated in a hemispherical inner space and heat generated from the plurality of LEDs is radiated to the outside by conduction and convection; A screw cap coupled to one end of the upper hemisphere and receiving power for driving the plurality of LEDs; A lower hemisphere, one end of which is combined with the heat transfer member to form a light bulb shape incorporating the LED module together with the upper hemisphere and is formed in a transparent or translucent hemisphere shape; It is formed from the plurality of LEDs and the driving circuit module by having a spiral first heat dissipation pin on the outer surface of the body of the truncated conical shape disposed in the space formed by the upper hemisphere, the hollow portion in the center of the drive circuit module A heat dissipation unit for dissipating heat to the outside through the upper hemisphere and the plurality of first openings by conduction and convection; LED lighting device comprising a. An LED module in which a plurality of LEDs are mounted on one surface of a metal circuit board; A driving circuit module disposed on the other surface of the metal circuit board and having a driving circuit for driving the plurality of LEDs; One end portion is coupled to the metal circuit board of the LED module so that the driving circuit module is accommodated in the hemispherical inner space, and has a plurality of first openings through which heat generated from the plurality of LEDs is dissipated to the outside by conduction and convection. With the upper hemisphere; A screw cap coupled to one end of the upper hemisphere and to which an external power source for driving the plurality of LEDs is applied; A lower hemisphere combined with the upper hemisphere to form a light bulb shape in which the LED module is embedded and formed in a transparent or semi-transparent hemisphere shape; Spiral first heat dissipation fins are disposed on the outer surface of the cylindrical body disposed in the space formed by the upper hemisphere and having one end coupled to the metal circuit board of the LED module, the other end contacting the upper hemisphere, and a hollow formed at the center thereof. And a heat dissipation unit for dissipating heat generated from the plurality of LEDs and the driving circuit module to the outside through the upper hemisphere and the plurality of first openings by conduction and convection; LED lighting device comprising a. The LED lighting device of any one of claims 1 to 3, wherein the heat dissipation part further includes a spiral second heat dissipation fin inside the body. The LED lighting apparatus of any one of claims 1 to 3, wherein the body of the heat dissipating unit further comprises a plurality of second openings penetrating the body to allow convection of air. The LED lighting apparatus according to any one of claims 1 to 3, wherein the circuit board is formed of an insulated metal. The LED lighting device of claim 6, wherein the insulated metal comprises carbon nanotubes. The LED lighting apparatus of claim 2, wherein the upper hemisphere and the heat transfer member are formed of copper, aluminum, magnesium, or an alloy thereof. The LED lighting apparatus of claim 1, wherein the heat dissipation fins of the heat dissipation unit are formed by a form rolling method. The LED illuminating device according to any one of claims 1 to 3, wherein the heat dissipation part is made of copper, aluminum, magnesium, or an alloy thereof. The LED lighting apparatus of claim 10, wherein the heat dissipation part comprises 0.1 to 20 wt.% Of carbon nanotubes or carbon nanofibers. The LED lighting device of claim 1, wherein the heat dissipation unit is coupled to a space between the heat dissipation fins and the heat dissipation fins, and further includes an auxiliary heat dissipation body made of a porous metal foam or a mesh. Device. The LED lighting apparatus of claim 12, further comprising a heat transfer member made of carbon nanofibers or carbon fibers between the heat dissipation unit and the auxiliary heat dissipating member. delete delete delete A truncated cone-shaped body having a hollow portion, A heat dissipation unit for an LED lighting device comprising a first heat dissipation fin formed in a spiral and integrally formed on the outer surface of the body. A cylindrical body having a hollow portion, The heat dissipation unit for the LED lighting device comprising a first heat dissipation fin formed in a spiral and integrally on the outer surface of the body. The method of claim 17 or 18, The heat dissipation unit for the LED lighting device further comprises a second heat dissipation fin formed spirally on the inner surface of the body. 20. The heat dissipation unit according to claim 19, wherein the body further comprises a plurality of openings passing through the body to allow convection of air. delete delete delete 19. The heat dissipation unit according to claim 17 or 18, wherein the heat dissipation fins of the body are formed by a form rolling method. 19. The heat dissipation unit for LED lighting apparatus according to claim 17 or 18, further comprising an auxiliary heat dissipating body coupled to a space between the heat dissipating pins and the heat dissipating pins, and made of a porous metal foam or a mesh.

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