CN101251246A - LED lamp and heat dissipation method thereof - Google Patents

Abstract

The present invention is an LED lamp and a heat dissipation method applied to the LED lamp. The lamp includes a base, a heat sink, an LED lamp board, a power driver and a lampshade. The heat sink and the lampshade form a channel inside the lamp. The base has an air inlet and an air outlet. The air inlet and the air outlet are respectively connected to the two ends of the channel to form an air circulation loop. The air flow speed is then accelerated by a fan to improve the heat dissipation efficiency. The present invention performs heat exchange between air and the lamp heat sink, so that air circulation is formed inside the lamp to improve the heat dissipation effect, which is better than the passive heat dissipation method of existing lamps through heat radiation.

Description

LED lamps and heat dissipation methods

technical field

The invention is an LED lamp and a heat dissipation method of the LED lamp.

Background technique

With the continuous development of technology, LED lamps have been widely used in various lighting fields. Existing LED lamps adopt the method of modularizing LEDs to improve the lighting brightness of the lamps, but at the same time the temperature of the lamps also rises accordingly. The heat dissipation structure and heat dissipation method of LED lamps have become an important subject of research by relevant people. Existing LED lamps generally use the combination of LED modules and heat dissipation modules. The heat dissipation module is in close contact with the lamp housing. By transferring the heat of the LED to the lamp housing, it exchanges heat with the outside air and passively dissipates heat through thermal radiation. method. This method causes a large amount of hot air to gather inside the lamp, so that the entire lamp is exposed to heat source radiation, and the LED works in a high-temperature environment for a long time, and the heat dissipation effect is not ideal.

Contents of the invention

In view of the above problems, the present invention proposes an LED lamp, which uses air circulation to dissipate heat, thereby improving the efficiency of heat dissipation.

The technical scheme of the present invention to achieve the above object is as follows: an LED lamp, which includes a base for fixing the lamp, a radiator installed on the base, an LED lamp board fixed on the surface of the radiator and closely attached to the radiator, The LED lamp board provides power supply and controls the power driver of the LED working state, and the lampshade fixed on the base and completely accommodates the radiator, the feature is that: the base is provided with an air inlet hole and an air outlet hole, the said The heat sink is in the shape of a cylinder, and inside the heat sink is provided with a plurality of heat dissipation fins arrayed on the central axis of the heat sink. It communicates with the gap between the outer wall of the radiator to form a channel, the above-mentioned air inlet hole communicates with one end of the channel, and the said air outlet hole communicates with the other end of the above-mentioned channel; Fan for radiator vents; said radiator is in the shape of a straight prism, consisting of a section of heat-conducting profile, all cross-sections of the radiator along its length have the same shape, LEDs are mounted on each side of the cooling column Light board; the base is in the shape of a ring with an annular groove for installing the lampshade, and the air inlet and outlet holes are located at the bottom of the base.

The present invention also proposes a heat dissipation method for LED lamps, which is applied to the LED lamps proposed by the present invention. The method is as follows: the air inlet holes, channels and air outlet holes of the LED lamps are connected with the external air of the lamps to form an air Circulation circuit, the external air enters the interior of the lamp from the air inlet hole, conducts heat exchange with the radiator through a passage located in the radiator, and takes away the heat generated by the lamp to form hot air, and then the hot air flows out of the lamp through the air outlet hole, and the heat generated by the lamp Heat is dissipated to the outside of the luminaire by the circulating flow of air.

Compared with the passive heat dissipation method in which the existing LED lamps dissipate heat through heat radiation, the present invention forms an air circulation channel inside the LED lamp, and has cooling fins in the channel to enhance the heat exchange between the lamp and the air. During the flow process, the heat generated by the lamps is taken away and flows out of the lamps to achieve the purpose of air circulation and heat dissipation, which is equivalent to the active heat dissipation of lamps. This method can greatly improve the heat dissipation effect of LED lamps, so it can Delaying the aging of electronic components and the attenuation of LEDs can prolong the service life of LED lamps to a certain extent.

Description of drawings

Fig. 1 is the outline drawing of lamps and lanterns of the present invention;

Fig. 2 is a schematic structural view of the base in the lamp of the present invention;

Fig. 3 is the structural exploded schematic diagram of lamps and lanterns of the present invention;

Fig. 4 is a schematic diagram of the heat dissipation method in the present invention.

Detailed ways

The present invention is an LED lamp that uses air circulation to actively dissipate heat. The present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to FIG. 1 , from the appearance, the LED lamp of the present invention includes a base 1 and a lampshade 4 fixed on the base 1. From the bottom of the lamp, the fan 3 in the base 1 and the inlet installed on the base 1 can be seen. Air hole 16 and air outlet hole 15. Referring again to the schematic diagram of the structure of the base 1 in Fig. 2 and Fig. 3, the base 1 is annular as a whole, and its cross-sectional shape is U-shaped. There is an annular groove 13 between them, and three evenly distributed legs and a plurality of evenly distributed air outlet holes 15 are arranged at the bottom of the annular groove 13, and the legs protrude outward. The outer wall 12 is provided with a fixing hole 120 for fixing the lampshade 4, the inner wall 11 surrounds the base 1 to form an inner hole 14, the inner hole 14 is used as the air inlet hole 16, and the top of the inner wall 11 has a boss 17 extending toward the inner hole 14 , A plurality of evenly distributed installation holes 170 are arranged on the upper and lower sides of the boss 17 . Referring again to the exploded view of the structure in Figure 3, the fan 3 is embedded in the inner hole 14 of the base 1 from the bottom of the base 1, and is fixed to the lower part of the boss 17 by screws; the radiator 2 is located on the upper part of the boss 17, and is also fixed to the boss by screws On the base 1; the LED light board 21 is fixed on the radiator 2 by screws, and is closely attached to each side of the radiator 2; the power driver 5 is a circuit board, and is installed on the top of the radiator 2 through a bracket; on the radiator The top of 2 is also equipped with a ceiling light 6 through a bracket, which is also composed of LED bulbs; the lampshade 4 accommodates all the above-mentioned components, and the bottom of the lampshade 4 is inserted into the annular groove 13 of the base 1 and contacts the outer wall 12 of the base 1 , install and fix through the fixing holes 120 of the outer wall 12 with screws.

The heat sink is in the shape of a straight prism, and all sections along its length have the same shape. The heat sink 2 shown in Fig. An integral heat-conducting profile made of heat sink 2 is provided with a plurality of heat dissipation fins 22 inside. The heat dissipation fins 22 are arranged in an array on the central axis of the heat sink 2, and a ventilation hole 23 is formed in the inner space of the heat sink 2. The ventilation hole 23 is connected with the base The inner hole 14 of the seat 1 is connected to and facing the fan 3 . The outer dimension of the radiator 2 is smaller than the diameter of the inner wall of the base 1. After the radiator 2 is installed, the outer wall of the radiator 2 and the inner wall of the lampshade 4 form an annular gap, which communicates with the ventilation hole 23 of the radiator to form a channel 7. One end of the channel 7 is connected to the inner hole 14 of the base 1, and the other end is connected to the air outlet 15 on the base 1. The inner hole 14 of the base 1 is used as the air inlet 16. In this way, the inside of the lamp A loop for gas circulation is formed with the outside air.

Referring to Figure 4, the cold air outside the lamp enters the interior of the lamp through the air inlet, and after sufficient heat exchange is carried out between the vent hole 23 in the radiator 2 and the radiator 2, the heat on the radiator is taken away, and then passes through the inside of the lamp. The channel 7 flows from the air outlet 15 to the outside of the lamp, so that the gas is circulated repeatedly, and the heat generated by the lamp is discharged to the outside of the lamp to achieve the purpose of heat dissipation. When the fan 3 rotates, cool air is blown into the internal ventilation hole 23 of the radiator 2, which can accelerate the speed of air circulation and further improve the heat dissipation effect. Similarly, when the fan 3 rotates in the opposite direction, the air inside the lamp will flow in the opposite direction, and the fan 3 will draw out the hot air in the radiator like an exhaust fan, and the cold air will enter the lamp through the air outlet on the base , the light flows out from the inner hole of the base, and the air inlet hole and the air outlet hole are exchanged to achieve the purpose of circulating heat dissipation.

The invention performs heat exchange between the air and the radiator of the lamp, so that the air inside the lamp circulates to improve the heat dissipation effect, which is better than the passive heat dissipation mode of the existing lamp through heat radiation.

Claims (5)

1. An LED lamp, which includes a base for fixing the lamp, a heat sink installed on the base, an LED light board fixed on the surface of the heat sink and close to the heat sink, providing power to the LED light board and controlling the LED The power driver in the working state, and the lampshade fixed on the base and completely containing the radiator, are characterized in that: the base is provided with an air inlet hole and an air outlet hole, and the radiator is cylindrical. The interior of the radiator is provided with a plurality of heat dissipation fins arrayed on the central axis of the radiator, and the heat dissipation fins form a ventilation hole inside the radiator, and the gap between the ventilation hole and the lampshade and the outer wall of the radiator A channel is formed through communication, the air inlet hole communicates with one end of the channel, and the air outlet hole communicates with the other end of the channel. 2. The LED lamp according to claim 1, wherein a fan facing the ventilation hole of the radiator is installed on the base. 3. The LED lamp according to claim 1, characterized in that: the heat sink is in the shape of a right prism, and the heat sink is composed of a section of heat-conducting profile, and all cross-sections of the heat sink along its length direction have the same shape, and the heat dissipation column Each side of the LED light board is installed. 4. The LED lamp according to claim 1, wherein the base is in an annular shape with an annular groove for installing the lampshade, and the air inlet and outlet holes are located at the bottom of the base. 5. A heat dissipation method applied to LED lamps according to any one of the above claims, characterized in that: the air inlet hole, channel and air outlet hole are connected with the external air of the lamp to form an air circulation loop, and the external air flows from The air inlet hole enters the interior of the lamp, conducts heat exchange with the radiator through a passage located in the radiator, and takes away the heat generated by the lamp to form hot air. The hot air then flows out of the lamp through the outlet hole, and the heat generated by the lamp is circulated by the air. And emit to the outside of the lamp.

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