Heat dissipation device

Abstract

A heat dissipation device comprises a cylindrical heat dissipation device body, a plurality of heat dissipation holes formed in the heat dissipation device body, a blocking piece tightly attached to the heat dissipation device body, and drivers connected between the blocking piece and the heat dissipation device body. The blocking piece comprises a blocking piece body, blocking strips connected with the blocking piece body, and first connecting portions arranged on the blocking piece body. The heat dissipation device body is provided with second connecting portions matched with the first connecting portions. The drivers are connected between the first connecting portions and the second connecting portions. The drivers are made of shape memory alloy material and can deform in the circumferential direction of the heat dissipation device body when heated to reach the preset temperature value. According to the heat dissipation device, in the room temperature, the blocking piece can close the heat dissipation holes so that the heat dissipation device can be in a closed state. After the heat dissipation device is heated, the drivers made of the shape memory alloy material can be stretched out and drawn back or can be bent in the circumferential direction of the heat dissipation device body, and therefore the blocking piece is driven to rotate so as to open the heat dissipation holes, and the heat dissipation efficiency is improved.

Description

technical field [0001] The invention relates to a heat dissipation structure, in particular to a radiator with heat dissipation holes. Background technique [0002] LED (Light Emitting Diode), that is, semiconductor electric light source, light-emitting diode, also known as semiconductor lamp, is a kind of electric light source without filament, which directly converts electrical energy into light energy. [0003] LED lights have the characteristics of energy saving and long life, avoiding the trouble of changing bulbs frequently, and are favored by more and more users. However, the heat dissipation problem of LED lights is also a key issue, which seriously affects the light efficiency and life of LED light sources. The heat dissipation of LED lights generally depends on the radiator. Traditional radiators are equipped with larger heat dissipation areas. However, the radiator is generally closed cylindrical, which makes the air inside the radiator unable to circulate with...

AI Technical Summary

Problems solved by technology

However, the radiator is generally closed cylindrical, which makes the air inside the radiator unable to circulate with the outside air in time, resulting in low heat dissipation efficiency, resulting in high temperature of the LED light source and power supply, thus affecting the light efficiency and life of the LED.

Although some radiators also have heat dissipation holes, in order to prevent dust and moisture for LED lights, the heat dissipation holes are small, resulting in problems such as insufficient heat dissipation, which will also affect the service life of LED lights

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