TWI398601B - Led lamp - Google Patents

Description

Light-emitting diode lamp

The invention relates to a lighting device, in particular to a light-emitting diode lamp.

As a highly efficient light source, the light-emitting diode has been widely used in various fields due to its environmental protection, power saving and long life. However, the light-emitting diode generates heat when it is working, especially some high-power light-emitting diodes for illumination. If the heat is not released in time, it will easily cause overheating, which will lead to a decrease in luminous efficiency.

The conventional light-emitting diode lamp includes a plate-shaped heat sink, a plurality of light-emitting diode modules mounted on one side of the heat-dissipating body, and a light-emitting body and a light-emitting diode module. When the light-emitting diode is illuminated, the temperature inside the lamp cover gradually rises; after a period of use, a large amount of heat is accumulated in the lamp cover. The air with the heat is blocked in the lampshade and cannot be circulated, and the temperature of the light-emitting diode is raised. These heats seriously affect the luminous efficiency and service life of the light-emitting diode.

A light-emitting diode lamp includes a plurality of light-emitting diode modules, a heat sink for attaching the light-emitting diode module, and a first heat sink, wherein the first heat sink includes a hollow cylinder and a plurality of heat dissipating fins extending inwardly from the inner wall of the cylinder, the heat absorbing body surrounding the outer side wall of the cylinder body, and the thickness of the heat absorbing body decreasing outward along the outer side wall of the cylinder body, and the outer side wall of the heat absorbing body is formed The inclined surface of the LED module is attached.

Compared with the prior art, the light emitting diode module of the light emitting diode lamp of the present invention is attached to the heat absorbing body extending outward from the outer periphery of the hollow cylinder The heat absorbing external sidewall forms an inclined surface to which the light emitting diode module is attached. The heat generated by the light-emitting diode lamp is absorbed by the heat-absorbing body and then uniformly transmitted to the hollow cylinder body, and finally radiated through the heat-dissipating fins, thereby improving the heat-dissipating efficiency of the light-emitting diode lamp, thereby ensuring stable operation of the lamp.

1 to 2, a light-emitting diode lamp according to a preferred embodiment of the present invention includes a first heat sink 10, a heat absorbing body 20 surrounding the outer circumference of the first heat sink 10, and a affixing device. a plurality of light emitting diode modules 30 on the heat absorbing body 20, a second heat sink 40 stacked on the heat absorbing body 20 and the first heat sink 10, and one of the light emitting diode modules 30 Lamp cover 50.

The first heat sink 10 has a substantially cylindrical shape and is integrally formed of a material such as copper or aluminum having good heat conductivity. The first heat sink 10 includes a circular tubular body 12 and a plurality of fins 14 extending from the barrel 12. The fins 14 extend radially inward from the inner wall of the barrel 12, and the fins 14 are uniformly symmetrically distributed about the central axis of the barrel 12. The heat dissipation fins 14 include a plurality of first heat dissipation fins 142 and a plurality of second heat dissipation fins 144 that are spaced apart from each other. The first heat dissipation fin 142 has an extended length greater than an extension length of the second heat dissipation fin 144. The ends of the first heat dissipation fins 142 are surrounded by a cylindrical first opening 16 .

Referring to FIG. 3 together, the overall shape of the heat absorbing body 20 is a regular pyramid shape with the tip removed, and is made of a metal having good thermal conductivity such as copper, aluminum or the like. A circular accommodating port 22 is formed in the center of the heat absorbing body 20, and the accommodating port 22 is coaxial with the heat absorbing body 20 and penetrates the heat absorbing body 20 up and down. The inner diameter of the receiving port 22 coincides with the outer diameter of the first heat sink 10 to make the first heat sink 10 It is just enough to penetrate the accommodating port 22 and partially accommodated in the heat absorbing body 20. The heat absorbing body 20 may be integrally formed or may be composed of a plurality of aliquots of heat absorbing members 24. In the present embodiment, the number of the heat absorbing members 24 is eight. The heat absorbing members 24 are radially and uniformly distributed symmetrically about a central axis of the heat absorbing body 20. The thickness of the heat absorbing member 24 is gradually decreased from the top to the bottom to form an inclined outer side (not labeled) on the outer side of the heat absorbing member 24. . The LED module 30 is disposed on the outer surface of the heat sink 24 . In the different embodiments, the number of the LED modules 30 can be selected according to the actual brightness. In this embodiment, a LED module 30 is attached to the outer surface of each of the heat absorption members 24 . The LED module 30 is disposed longitudinally along the outer surface of the heat absorbing member 24, so that the LED module 30 is evenly and symmetrically arranged around the axis of the heat absorbing body 20. In other embodiments, the heat absorbing body 20 can be integrally formed with the tubular body 12 of the first heat sink 10 such that the outer sidewall of the tubular body 12 of the first heat sink 10 forms a uniformly symmetrical inclined surface. The light emitting diode module 30 The axis of the first heat sink 10 is symmetrically distributed on the inclined surface.

The LED module 30 includes a vertically long circuit board 32 and a plurality of LEDs 34 uniformly fixed to one side of the circuit board 32. The other side of the circuit board 32 is attached to the heat absorbing member 24 of the heat absorbing body 20. The light-emitting diodes 34 extend in the longitudinal direction of the circuit board 32 and are arranged in a line so as to uniformly conduct heat generated by the light-emitting diodes to the heat absorbing body 20.

The second heat sink 40 has a substantially disk shape and is integrally formed of a material such as copper or aluminum having good heat conductivity. The second heat sink 40 includes a circular substrate 42 and a plurality of fins 44 extending from the surface of the substrate 42. The base The plate 42 extends vertically upwardly around a central through hole (not shown), and has a cylindrical tubular body 46. The tubular body 46 has a cylindrical second opening 48 therein, and the second opening 48 extends perpendicularly through the second heat dissipation. 40. The fins 44 extend perpendicularly from the top surface of the substrate 42 and the fins 44 are arranged around the outer periphery of the tube body 46 at radial intervals. The height of the fins 44 near the tube body 46 is higher than the height of the fins 44 away from the tube body 46, so that the fins 44 are stepped as a whole. The second heat sink 40 is disposed on the heat sink 20 and the first heat sink 10 that is disposed in the receiving port 22 of the heat sink 20 .

The lampshade 50 is a hollow bowl which is typically made of plastic, glass or other transparent material. The lamp cover 50 has a through opening 52 that penetrates the lamp cover 50 up and down. The bottom of the lamp cover 50 is connected to and surrounds the outer periphery of the bottom end of the first heat sink 10, and the top portion thereof is corresponding to the periphery of the bottom surface of the substrate 42 of the second heat sink 40, so that the lamp cover 50 is first and second. A heat-dissipating body 20 and a light-emitting diode module 30 attached to the heat-absorbing body 20 are accommodated therein.

Referring to FIG. 4 , when the LED device is assembled, the heat absorbing body 20 is combined with the LED module 30; then the first heat sink 10 is inserted into the absorbing body 20 . a port 22, wherein a top surface of the first heat sink 10 is flush with a top surface of the heat absorbing body 20, such that the heat absorbing body 20 correspondingly surrounds the cylindrical body 12 of the first heat sink 10; Soldering or bonding to the heat absorbing body 20 and the first heat sink 10, wherein the bottom surface of the substrate 42 of the second heat sink 40 is adhered to the top surface of the heat absorbing body 20 and the top surface of the first heat sink 10, The first port 16 of the first heat sink 10 and the first The second opening 48 of the two heat sinks 40 is correspondingly connected; finally, the lamp cover 50 is matched with the first and second heat sinks 10, 40, and the bottom of the lamp cover 50 is connected and surrounds the first heat sink. The outer periphery of the bottom end of the bottom end of the substrate 40 is connected to the periphery of the bottom surface of the substrate 42 of the second heat sink 40, thereby enclosing a closed chamber between the lamp cover 50 and the first and second heat sinks 10, 40 ( The heat absorbing body 20 and the light emitting diode module 30 attached to the heat absorbing body 20 are accommodated therein.

The light-emitting diode module 30 of the light-emitting diode lamp of the present invention is attached to the heat absorbing body 20 extending outward from the outer periphery of the hollow cylinder 12, and the outer side wall of the heat absorbing body 20 is formed with a light-emitting diode module. The second heat sink 40 is stacked on the first heat sink 10 and the heat absorbing body 20, and the first port 16 and the second heat sink 40 in the center of the first heat sink 10 are The two ports 48 are connected. When the illuminating diode lamp is in operation, the illuminating diode module 30 generates heat which is absorbed by each of the heat absorbing members 24 of the heat absorbing body 20, and is evenly conducted to the first and second heat sinks 10 connected to the heat absorbing body 20. At 40, finally, the heat dissipation fins 14 and the heat sinks 44 are radiated to the surrounding air. The first port 16 of the first heat sink 10 communicates with the second port 48 of the second heat sink 40 to enhance the heat sink 44 between the heat sink fins 14 of the first heat sink 10 and the second heat sink 40. Convection between the air. In this way, the heat dissipation performance of the light-emitting diode lamp of the present invention can be ensured, and the service life of the light-emitting diode lamp can be prolonged. In addition, since the heat absorbing members 24 disposed on the light emitting diode module 30 are radially symmetrically arranged around the first heat sink 10, the light emitting diode module 30 is circumferentially wound around the central axis of the first heat sink 10. Arranged, so the area illuminated by the light-emitting diode lamp is wider than the conventional light-emitting diode, achieving a better lighting effect.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims.

10‧‧‧First radiator

12‧‧‧Cylinder

14‧‧‧Heat fins

142‧‧‧First heat sink fin

144‧‧‧second heat sink fin

16‧‧‧ first port

20‧‧‧heat absorber

22‧‧‧容口

24‧‧‧Heats

30‧‧‧Lighting diode module

32‧‧‧ boards

34‧‧‧Lighting diode

40‧‧‧second radiator

42‧‧‧Substrate

44‧‧‧ Heat sink

46‧‧‧second port

48‧‧‧ tube body

50‧‧‧shade

52‧‧‧ wearing a mouth

1 is a combined perspective view of a preferred embodiment of a light-emitting diode lamp of the present invention.

2 is an exploded perspective view of FIG. 1.

Figure 3 is an inverted view of Figure 2.

Figure 4 is an inverted view of Figure 1.

10‧‧‧First radiator

12‧‧‧Cylinder

14‧‧‧Heat fins

142‧‧‧First heat sink fin

144‧‧‧second heat sink fin

16‧‧‧ first port

20‧‧‧heat absorber

22‧‧‧容口

24‧‧‧Heats

30‧‧‧Lighting diode module

40‧‧‧second radiator

42‧‧‧Substrate

44‧‧‧ Heat sink

46‧‧‧second port

48‧‧‧ tube body

50‧‧‧shade

52‧‧‧ wearing a mouth

Claims (11)

A light-emitting diode lamp includes a plurality of light-emitting diode modules, a heat sink for attaching the light-emitting diode module, and a first heat sink, wherein the first heat sink includes a hollow cylinder and The heat dissipation body is disposed on the outer side wall of the cylinder body, and the thickness of the heat absorbing body decreases outward along the outer side wall of the cylinder body, and the heat absorbing body is disposed. The outer side wall is formed with an inclined surface to which the light emitting diode module is attached, and the cylindrical body has a first through hole, and the first through hole penetrates the first heat sink. The illuminating diode lamp according to claim 1, wherein the heat absorbing body is composed of a plurality of heat absorbing members, and the heat absorbing members are radially distributed with respect to the cylindrical body. The illuminating diode lamp of claim 1, wherein the heat absorbing body is integrally formed with the barrel of the first heat sink. The illuminating diode lamp according to the first aspect of the invention, wherein a central portion of the absorbing body has a receiving opening, and the inner wall of the accommodating opening is correspondingly fitted to the outer wall of the cylinder. The illuminating diode lamp of claim 1, wherein the first port is surrounded by an end of the heat dissipating fin. The illuminating diode lamp of claim 1, further comprising a second heat sink, the second heat sink comprising a substrate attached to the top surface of the heat absorbing body and the cylinder and the top of the substrate A plurality of fins extending from the surface. The illuminating diode lamp of claim 6, wherein the second heat sink has a second port communicating with the first port. The illuminating diode lamp of claim 7, wherein the substrate has a circular shape, and a middle portion has a through hole, and the substrate surrounds the through hole An elongated tubular body extends upwardly, and the second opening is formed inside the tubular body. The illuminating diode lamp of claim 8, wherein the heat sink extends vertically from a top surface of the substrate, and the heat sinks are arranged around the outer circumference of the tube and are radially spaced apart. cloth. The light-emitting diode lamp of claim 6, wherein the light-emitting diode module covers the light-emitting diode module, and the light cover and the first and second heat sinks enclose a closed chamber. The heat absorbing body and the light emitting diode module attached to the heat absorbing body are accommodated therein. The illuminating diode lamp of claim 10, wherein the bottom of the lamp cover is connected to and surrounds the outer periphery of the bottom end of the first heat sink, and the top portion thereof is correspondingly connected to the bottom surface of the second heat sink.