CN102278613A - Light-emitting diode lamp - Google Patents

Abstract

A light-emitting diode lamp, comprising a heat sink and at least one light-emitting diode element arranged on the heat sink, the heat sink includes a base plate, a cylinder extending from the base plate, and an outer surface of the cylinder A plurality of heat dissipation fins, the substrate includes a first surface and a second surface opposite to the first surface, the light emitting diode element is arranged on the first surface, and the barrel extends from the second surface of the substrate , the heat dissipation fins extend in a curved shape from the outer surface of the cylinder along the radial direction of the cylinder. The heat sink of the LED lamp is provided with cooling fins extending outward in a curved shape, and each cooling fin has a larger heat dissipation area, so that the LED lamp has higher heat dissipation efficiency.

Description

LED lamps

technical field

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

Background technique

Light-emitting diodes (LEDs) have the advantages of small size, high efficiency, no mercury, and long life, so they can replace existing fluorescent or incandescent lamps, reducing energy consumption and carbon dioxide emissions. However, the light-emitting diodes will generate a lot of heat when they work, especially when they are used in indoor lights with a relatively compact structure. Poor heat dissipation will affect the luminous efficiency of the light-emitting diodes and even cause the light-emitting diodes to be damaged.

Contents of the invention

In view of this, it is necessary to provide a light-emitting diode lamp with high heat dissipation efficiency.

A light-emitting diode lamp, comprising a heat sink and at least one light-emitting diode element arranged on the heat sink, the heat sink includes a base plate, a cylinder extending from the base plate, and an outer surface of the cylinder A plurality of heat dissipation fins, the substrate includes a first surface and a second surface opposite to the first surface, the light emitting diode element is arranged on the first surface, and the barrel extends from the second surface of the substrate , the heat dissipation fins extend in a curved shape from the outer surface of the cylinder along the radial direction of the cylinder.

The radiator of the light-emitting diode lamp is provided with cooling fins extending outward in a curved shape, and each cooling fin has a larger heat dissipation area, so that the radiator has a higher heat dissipation efficiency. The generated heat can be quickly dissipated to the outside by the heat sink, thereby ensuring stable operation of the light-emitting diode lamps.

Description of drawings

FIG. 1 is a three-dimensional assembly view of an LED lamp according to an embodiment of the present invention.

FIG. 2 is a three-dimensional exploded view of the LED lamp in FIG. 1 .

FIG. 3 is a top view of the heat sink in the LED lamp in FIG. 2 .

FIG. 4 is a cross-sectional view of the heat sink in the LED lamp in FIG. 2 .

Description of main component symbols

 Light-emitting diode lamps 100 lamp holder 10 heat sink 20 Substrate twenty one first surface 211 second surface 212 through hole 213 Installation department twenty two Snap Department 221 card slot 222 Cylinder twenty three containment space 231 opening 232 Heat sink fins twenty four the first line segment 241 bending section 243 second line segment 245 Light-emitting diode components 30 lampshade 40 Drive circuit module 50

Detailed ways

The present invention will be further described below in conjunction with specific embodiments with reference to the accompanying drawings.

Please refer to FIG. 1 and FIG. 2 , an LED lamp 100 according to an embodiment of the present invention includes a lamp holder 10 , a radiator 20 fixed on the lamp holder 10 , and a plurality of LED elements 30 arranged on the radiator 20 And a lampshade 40 arranged on the radiator 20 and covering on the LED element 30 .

The lamp holder 10 is used for electrically connecting with an external power source to supply power for the LED lamp 100 . The lamp holder 10 is a standard component, so that the LED lamp 100 can directly replace a traditional incandescent bulb.

The radiator 20 is integrally made of high thermal conductivity and high temperature resistant materials, such as metal materials and ceramic materials. Preferably, the metal material is selected from copper, aluminum and their alloys, and the ceramic material is selected from alumina and aluminum nitride, wherein the heat sink 20 made of alumina or aluminum nitride can also take into account the effect of insulation. In this embodiment, the heat sink 20 is made of aluminum which is relatively easy to form. The heat sink 20 includes a base plate 21, an annular mounting portion 22 extending upward from the periphery of the base plate 21, a longitudinal cylinder 23 extending downward from the periphery of the base plate 21, and the mounting portion 22 and the cylinder. The outer surface of the body 23 has a plurality of cooling fins 24 extending outward.

3 and 4, the substrate 21 includes a first surface 211 and a second surface 212 opposite to the first surface 211, the substrate 21 is provided with a Several through holes 213. The through hole 213 communicates the airflow on the side of the first surface 211 of the substrate 21 with the airflow on the side of the second surface 212 of the substrate 21 .

The mounting portion 22 protrudes upwards from the periphery of the first surface 211 of the substrate 21, and the top end of the mounting portion 22 is provided with four engaging portions 221 protruding inwardly of the mounting portion 22, and the four engaging portions 221 are along the The circumferential direction of the mounting portion 22 is arc-shaped and distributed at equal intervals, and a locking groove 222 is formed between each engaging portion 221 and the base plate 21 . The engaging portion 221 and the engaging groove 222 are used to cooperate with the lampshade 40 to fix the lampshade 40 on one side of the first surface 211 of the substrate 21 .

The barrel 23 extends downward from the periphery of the second surface 212 of the substrate 21 . The cylinder body 23 is cylindrical, and a receiving space 231 is formed inside, and the receiving space 231 is used to accommodate a drive circuit module 50, and the drive circuit module 50 is electrically connected to the LED element 30 and the lamp holder 10. connect. An opening 232 is formed at an end of the barrel 23 away from the base plate 21 , and the lamp holder 10 is docked at the opening 232 .

The cooling fins 24 are arranged radially around the barrel 23 . Each cooling fin 24 is elongated along the axial direction of the barrel 23 . Please refer to FIG. 3 , each cooling fin 24 extends outward along the radial direction of the cylinder 23 from the cylinder 23 to form a first straight line segment 241 , and then bends and extends toward one side of the radial direction to form a bend. segment 243, and finally extend radially outward to form a second straight segment 245, and the bent segment 243 is connected between the first straight segment 241 and the second straight segment 245, so that each cooling fin 24 The barrel 23 extends outwards in a curved shape. Each heat dissipation fin 24 extends from the outer surface of the mounting part 22 to the outer surface of the cylinder 23 along the axial direction of the cylinder 23, and the height of the heat dissipation fin 24 extending outward from the cylinder 23 is from the installation The end where the part 22 is located gradually decreases to the end where the barrel 23 is located, that is, it gradually decreases from the end close to the LED element 30 to the end far away from the LED element 30, so that the heat dissipation fins can be fully utilized 24 and reduce the volume of the light emitting diode lamp 100. The heat dissipation fins 24 are arranged in pairs, each pair of heat dissipation fins 24 is close to the inside of the mounting portion 22 and the cylinder 23, and each pair of heat dissipation fins 24 is far away from the outside of the mounting portion 22 and the cylinder 23. away to make full use of the peripheral space of the radiator 20 .

The light emitting diode element 30 is fixed on the first surface 211 of the substrate 21, and the light emitting diode element 30 is electrically connected to the driving circuit module 50 through the through hole 213 on the substrate 21 through a wire (not shown in the figure). sexual connection.

The lampshade 40 is made of light-transmitting materials, such as glass and plastic. The lampshade 40 is a hollow bowl. The lampshade 40 is docked on the mounting portion 22 of the heat sink 20 and covers the LED element 30 therein.

When the light-emitting diode lamp 100 is working, part of the heat generated by the light-emitting diode element 30 is directly transferred to the heat dissipation fins 24 through the substrate 21 of the radiator 20, and the other part of the heat is convected through the through holes 213 on the substrate 21. into the barrel 23 , and then transfer to the cooling fins 24 through the barrel 23 , and finally, the heat generated by the LED element 30 is dissipated to the surrounding environment through the cooling fins 24 . In addition, the heat generated by the driving circuit module 50 is also transferred to the heat dissipation fins 24 through the cylinder 23 of the heat sink 20 and finally dissipated to the surrounding environment. The heat dissipation fins 24 on the heat sink 20 of the LED lamp 100 extend outward in a curved shape, and each heat dissipation fin 24 has a larger heat dissipation area, so that the heat sink 20 has a higher heat dissipation efficiency. The heat generated by the LED lamp 100 can be rapidly dissipated to the outside by the heat sink 20 , thereby ensuring the stable operation of the LED lamp 100 .

Claims (10)

1. A light-emitting diode lamp, comprising a heat sink and at least one light-emitting diode element arranged on the heat sink, characterized in that: the heat sink includes a base plate, a cylinder extending from the base plate and set on the heat sink A plurality of heat dissipation fins on the outer surface of the cylinder, the substrate includes a first surface and a second surface opposite to the first surface, the light-emitting diode element is arranged on the first surface, and the cylinder is composed of The second surface of the base plate extends, and the heat dissipation fins extend in a curved shape from the outer surface of the cylinder along the radial direction of the cylinder. 2. The light-emitting diode lamp according to claim 1, wherein the curved shape includes a first straight line extending outward along the radial direction of the barrel, and then bent and extended along one side of the radial direction A bent segment is formed, and then extended radially outward to form a second straight segment. 3. The light-emitting diode lamp according to claim 1, wherein the heat dissipation fins are in pairs, each pair of heat dissipation fins is close to the inner side of the cylinder, and each pair of heat dissipation fins is far away from the cylinder. outside of each other. 4. The light-emitting diode lamp as claimed in claim 1, wherein each heat dissipation fin is strip-shaped along the axial direction of the cylinder, and the height of each heat dissipation fin extending outward from the outer surface of the cylinder is from An end close to the light emitting diode element gradually decreases toward an end far away from the light emitting diode element. 5. The light emitting diode lamp as claimed in claim 1, wherein a through hole penetrating through the first surface and the second surface is formed on the substrate. 6. The light-emitting diode lamp as claimed in claim 1, wherein the cooling fins are arranged radially around the barrel. 7. The light-emitting diode lamp according to claim 1, wherein the radiator is integrally made of metal material or ceramic material. 8 . The LED lamp as claimed in claim 1 , further comprising a transparent lampshade fixed on one side of the first surface of the substrate of the heat sink. 9. The light-emitting diode lamp according to claim 8, characterized in that: the periphery of the first surface of the substrate protrudes upwards to form a ring-shaped mounting portion, and the mounting portion is provided with an inwardly protruding engaging portion , the engaging portions are distributed at intervals along the circumferential direction of the mounting portion, a locking groove is formed between each engaging portion and the base plate, and the lampshade is fixed on the radiator through the engaging portion and the engaging groove. 10. The light-emitting diode lamp according to claim 1, further comprising a lamp holder, the barrel is cylindrical, a receiving space is formed in the barrel, and an opening is formed at the end of the barrel away from the base plate , the accommodating space is used for accommodating a driving circuit module, and the lamp holder is docked at the opening.

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