CN103047569A - LED lamp bulb structure - Google Patents

Abstract

The invention discloses an LED lamp bulb structure. The LED lamp bulb structure comprises a plurality of carbon fiber tubes, a heat radiator, a PCB (printed circuit board), LED chips, a lens and a lampshade, the heat radiator is hollow inside and arranged in the lampshade, the carbon fiber tubes are arranged in the hollow cavity of the heat radiator, a plurality of vent holes are reserved on lateral sides of the heat radiator, one ends of the carbon fiber tubes are connected with a bottom base plate of the heat radiator, and the other ends of the carbon fiber tubes penetrate through the top of the heat radiator and are connected with the lampshade, the heat radiator is connected with the PCB, the LED chips are mounted on the PCB, and the lens is connected with the bottom of the heat radiator. By means of high one-way heat conduction performance of carbon fibers, heat generated by the LED chips is quickly conducted to the heat radiator and the lampshade, and temperature control requirements of the chips are met.

Description

An LED bulb structure

technical field

The invention relates to heat dissipation of a high-power electronic product, in particular to the design of a heat dissipation structure of an LED bulb lamp.

Background technique

As the fourth-generation lighting technology, LED lighting has the advantages of high luminous efficiency, environmental protection, long life, strong directionality, and good color rendering compared with traditional incandescent lamps and energy-saving lamps. It is widely used in display, decoration, road and other fields. In some special lighting fields, however, the photoelectric conversion efficiency of LEDs only reaches 10-20%, and about 80-90% of the heat is converted into energy. If the heat is not removed in time, the performance of the light source will be reduced and the life of the LED will be affected.

In the existing LED lighting heat dissipation technology, the heat generated by the LED chip is usually transferred to the environment by using a radiator. The heat dissipation material is generally aluminum, copper or other heat-conducting materials. For high-power LED lights, the quality of the radiator Generally, the volume is large and heavy, and there are also disadvantages of poor ventilation, which affects the heat dissipation effect of the radiator. Existing heat dissipation designs for LED bulb lamps seldom make full use of the heat dissipation of the lampshade to reduce the weight of the LED heat sink itself, so the cost is relatively high.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the existing heat dissipation design of LED bulb lamps, and provide an LED efficient heat dissipation structure for LED bulb lamps.

The present invention utilizes the one-way high thermal conductivity of the carbon fiber of the current material and the heat dissipation performance of the lampshade to quickly remove the heat generated by the LED chip, reduce the temperature of the LED chip, and make it work within a normal temperature range.

In order to achieve the above object, the present invention proposes the following technical solutions:

An LED bulb lamp structure, including carbon fiber tubes, radiators, PCB boards, LED chips, lenses and lampshades; the inside of the radiator is hollow and arranged in the lampshade; a plurality of carbon fiber tubes are arranged in the hollow of the radiator to dissipate heat There are multiple ventilation holes on the side of the radiator; one end of the carbon fiber tube is connected to the bottom substrate of the radiator, and the other end runs through the top of the radiator and connected to the lampshade; the radiator is connected to the PCB board, the LED chip is installed on the PCB board, and the lens is connected to the radiator. bottom connection.

In order to further realize the purpose of the present invention, the carbon fiber tube is selected from Mitsubishi K13D2U high thermal conductivity pitch-based carbon fiber material with a diameter between 2-10mm.

The number of the ventilation holes is 9-15, the width of the ventilation holes is 3-5mm, and the height is 20-50mm.

The wall thickness of the radiator is 3-5mm.

A hole is opened on the top of the radiator, and the diameter of the hole is between 2-10mm.

A circular hole is also arranged at the center of the top of the radiator.

The LED chips are arranged on a concentric circle of the PCB board.

The lens is in a hemispherical shape and is connected to the bottom of the radiator by screwing.

Compared with the prior art, the above-mentioned invention has the following advantages:

1) The carbon fiber tube used in the present invention is a material with high thermal conductivity. The heat generated by the LED chip is transmitted to the carbon fiber tube through the PCB board and the bottom of the radiator; because the carbon fiber tube is a material with high thermal conductivity, its thermal conductivity is much greater than that of aluminum and copper materials, and it can quickly transfer heat For the bottom of the radiator and the lampshade, the heat is transferred to the ambient air through the lampshade and radiator, which can effectively reduce the temperature of the LED chip and meet the temperature control requirements;

2) The interior of the radiator of the present invention is hollow, which saves the materials used for the radiator; the material of the radiator can be plastic or other heat-conducting materials, which saves the cost of the radiator; the side of the heat dissipation has ventilation holes, which can increase the internal air of the radiator. flow, improve the cooling performance of heat dissipation;

3) The lampshade of the present invention is connected with the carbon fiber tube, and the heat transferred by the carbon fiber tube can be quickly dissipated into the air through the surface of the lampshade, reducing the thermal load of heat dissipation; the surface of the lampshade can be sprayed with radiation heat dissipation coating to increase the heat dissipation performance of its surface; the lampshade Some artistic patterns can be added to the surface of the lamp to improve the artistic appreciation of the lamp; at the same time, because the lampshade can prevent the accumulation of dust in the heat dissipation of the radiator, it avoids the performance of the radiator due to the accumulation of dust in the radiator; the hemispherical shape of the lampshade can play the role of concentrating light.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the LED bulb lamp of the present invention.

Shown in the figure are: LED chip 1 , ventilation hole 2 , carbon fiber tube 3 , radiator 4 , lampshade 5 , lens 6 and PCB board 7 .

specific implementation

An LED bulb lamp structure is an LED bulb lamp with high heat dissipation, including a carbon fiber tube 3 , a radiator 4 , a PCB board 7 , an LED chip 1 , a lens 6 and a lampshade 5 . The radiator 4 is cylindrical and hollow inside, and is arranged in the lampshade 5; the carbon fiber tube 3 is arranged in the hollow of the radiator 4, and one end of the carbon fiber tube 3 is connected with the bottom substrate of the radiator 4, and the other end runs through the top of the radiator 4, And be connected with lampshade 5; The bottom of heat sink 4 is connected with PCB board 7 by the heat conduction glue of high thermal conductivity, LED chip 11 is installed on PCB 7 board, preferably all LED chips 1 are arranged on a concentric circle; Lens 6 is Hemispherical, connected with the bottom of the radiator 4 by screwing;

The carbon fiber tube 3 is a pitch-based carbon fiber material with a high thermal conductivity of Mitsubishi K13D2U produced by Mitsubishi Chemical Co., Ltd., with a thermal conductivity of 800W/K m and a diameter between 2-10mm; The other end is connected with the lampshade 5 and runs through the top of the radiator 4 in the middle.

The material of the radiator 4 is preferably aluminum or aluminum alloy; the interior is hollow, and the vent holes 2 are opened on the side, the number of the vent holes 2 is 9-15, the width of the vent holes 2 is preferably 3-5mm, and the height is 20-50mm The wall thickness of the radiator 4 is preferably 3-5mm; the top of the radiator 4 has a hole, and the aperture is between 2-10mm; the center of the radiator 4 is also provided with a round hole, which is used for the connection of the external power line and the PCB board 7;

The material of the lampshade 5 is aluminum or other heat-conducting materials; it is hemispherical, with a hole at the top, and the aperture is 2-10mm; the surface of the lampshade 5 can be sprayed with heat-dissipating paint to increase the heat dissipation performance of the radiator 4, and at the same time design patterns on the surface to increase the close view of the lampshade sex;

The PCB board 7 is connected to the bottom of the radiator 4 through silica gel with high thermal conductivity; the LED chip 1 and the PCB board 7 are welded together;

The present invention is a high-efficiency heat-dissipating LED bulb lamp structure. During operation, the heat generated by the LED chip 1 is transferred to the PCB board 7, and then transferred to the substrate of the radiator 4 by the PCB board. There is a temperature difference, and the surface of the radiator 4 transfers heat to the environment in the form of thermal radiation. Due to the heating of the air around the radiator 4, the density becomes smaller, and there is a pressure difference to form natural convection. The heat of the radiator 4 is transferred to the air; because the radiator 4 has the ventilation hole 2, the fluidity of the air inside the radiator 4 is increased, and the heat dissipation performance of the radiator is improved; at the same time, the substrate of the radiator 4 is connected with the carbon fiber tube 3, through high thermal conductivity The carbon fiber tube 3 can transfer heat to the top of the radiator 4 and the lampshade 5. The lampshade 5 is in contact with the ambient air, and the heat transferred by the LED chip 1 is transferred to the ambient air by heat conduction, natural convection heat transfer and radiation heat transfer. . When the lampshade 5 is working, it can not only transfer heat to the environment, but also can concentrate the light emitted by the LED chips, and can also prevent dust from accumulating inside the radiator 4 and affecting the performance of the radiator 4. .

Claims (8)

1. A LED bulb structure, characterized in that: it comprises a carbon fiber tube, a radiator, a PCB board, an LED chip, a lens and a lampshade; the inside of the radiator is hollow and is arranged in the lampshade; a plurality of carbon fiber tubes are arranged on In the hollow of the radiator, there are multiple ventilation holes on the side of the radiator; one end of the carbon fiber tube is connected to the bottom substrate of the radiator, and the other end runs through the top of the radiator and connected to the lampshade; the radiator is connected to the PCB board, and the LED chip is installed on the PCB board Above, the lens is attached to the bottom of the heat sink. 2. The structure of the LED bulb lamp according to claim 1, wherein the carbon fiber tube is made of pitch-based carbon fiber material with high thermal conductivity of Mitsubishi K13D2U, and the diameter is between 2-10 mm. 3. The LED bulb lamp structure according to claim 1, characterized in that: the number of the ventilation holes is 9-15, the width of the ventilation holes is 3-5mm, and the height is 20-50mm. 4. The LED bulb lamp structure according to claim 1, characterized in that: the heat sink has a wall thickness of 3-5mm. 5. The LED bulb lamp structure according to claim 1, characterized in that: the top of the heat sink has a hole with a diameter between 2-10mm. 6. The LED bulb lamp structure according to claim 1, characterized in that: a round hole is further provided in the center of the top of the heat sink. 7. The LED bulb lamp structure according to claim 1, wherein the LED chips are arranged on a concentric circle of the PCB board. 8. The LED bulb lamp structure according to claim 1, wherein the lens is in a hemispherical shape and is connected to the bottom of the heat sink by screwing.