LED lamp using hot air flows for rotation radiating

Abstract

The invention discloses an LED lamp using hot air flows for rotation radiating. A plurality of LED lamp beads are welded to the lower surface of a circular aluminum substrate. The aluminum substrate is fixed on the lower end face of the central column of a sunflower type aluminum radiator central column. A transparent lampshade is mounted on the central inner cylindrical face of the radiator. A hot air flow accelerating rotor is a hollow ball. Arc-shaped air flow guide grooves are formed in the surface of the hot air flow accelerating rotor at equal distance. A heat collecting cavity is a hollow cylinder, and the lower end and the upper end of the cylinder form a rotation pair. A support shaft penetrates the ball and the cylinder to be fixedly connected with the radiator which is mounted in the heat collecting cavity. One end of a wire penetrates a support shaft hole and the radiator to be respectively connected with the anode and the cathode of the aluminum substrate. The other end of the wire is connected with a power supply. The LED lamp has the advantages that the hot air flows are used to drive the hot air flow accelerating rotor to rotate, dust is blown off, air convection on the periphery of the radiator is accelerated, radiating efficiency is increased, working temperature of the LED beads is guaranteed, and the service life is prolonged; the LED lamp using the hot air flows for rotation radiating is especially applicable to large-power LED lamps with the power above 20W, radiating materials is saved, and cost is lowered.

Description

technical field [0001] The invention relates to a lighting fixture, in particular to an LED lamp which uses hot air flow to rotate and dissipate heat. Background technique [0002] At present, LED lights have been widely recognized and applied, but the heat dissipation problem of high-power LEDs still limits the application of LED lights in special environments with harsh conditions and high brightness requirements. [0003] People pay more and more attention to the heat dissipation of LED. This is because the light decay or life of LED is directly related to its junction temperature. If the heat dissipation is not good, the junction temperature will be high and the life will be short. 10 ℃ life will be extended by 2 times; in addition, the heat of the LED will also make its spectrum shift; the color temperature increases; the forward current increases (when the power supply is constant voltage); the reverse current also increases; the thermal stress increases; There are ...

AI Technical Summary

Problems solved by technology

In order to increase the heat dissipation area, the method of increasing the height or length is usually adopted. However, after the height increases to a certain extent, its effect will become smaller and smaller. After the length increases to a certain extent, the junction temperature will not only no longer decrease, but will increase.

Therefore, for high-power LED lamps, simply increasing the heat sink cannot effectively solve the heat caused by increasing the power.

In addition to increasing the heat dissipation area, adding a cooling fan to accelerate the convection of the air can significantly improve the heat dissipation performance, but the common cooling fan needs to be additionally driven by electricity, which increases the structural requirements of high-power LED lights, especially in high temperature, high humidity, high In a dusty environment, the cooling fan outside the heat sink is not applicable

[0005] Therefore, how to effectively solve the heat dissipation problem in the harsh trial environment has become a bottleneck in the development of high-power LED lamps. Blindly increasing the area of ​​heat dissipation parts will not only fail to effectively improve heat dissipation, but will also increase costs.

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