Venturi effect and a kind of LED heat dissipation device modified by synthetic jet

Abstract

The invention discloses a LED heat dissipation device of a Venturi effect and modification synthetic ejector. The LED heat dissipation device comprises a housing, a synthetic jet actuator, fins and anLED base plate. The LED heat dissipation device is characterized by further comprising a Venturi tube, wherein the fins, the Venturi tube and the synthetic jet actuator are fixedly arranged inside acavity defined by the LED base plate and the housing, so that the position of the Venturi tube and the positions of the fins are relatively fixed; the bottom of the synthetic jet actuator is equippedwith a connecting cover; the connecting cover is connected with the Venturi tube; the outlet of the Venturi tube is connected with the fins; and the housing is fixed with the LED base plate through aslide slot. The invention designs a double-film three-cavity synthetic jet actuator; and the outlet of the synthetic jet actuator is additionally equipped with the Venturi tube, so that flow at the outlet is finally increased. By changing a fluid state and increasing gas inlet amount, heat dissipation efficiency is improved, a junction temperature of the LED is reduced, and the service life of theLED is prolonged.

Description

technical field [0001] The invention relates to the technical field of heat dissipation devices for LED lamps, in particular to a Venturi effect and a modified LED heat dissipation device for a synthetic jet. Background technique [0002] For high-power LEDs with integrated power greater than 30w, the problem of heat dissipation is extremely serious. The reason is that the photoelectric conversion efficiency of high-power LEDs is only about 20% to 30%, and the rest of the electrical energy is converted into heat energy. The huge heat dissipation of LEDs has caused a series of problems such as reduced light intensity and accelerated aging of components. According to the light decay curve provided by the global semiconductor lighting giant Cree, when the junction temperature is 65 degrees, the LED life can reach 100,000 hours, and when the junction temperature rises to 105 degrees, the lifespan is shortened to 10,000 hours . The lifetime of LED devices decays exponentially w...

AI Technical Summary

Problems solved by technology

Among the existing heat dissipation methods, profile heat dissipation occupies a relatively large market share due to its cheap and reliable characteristics, but the heat dissipation capacity of profiles is very limited and cannot meet the heat dissipation requirements

Although other heat dissipation methods have high heat dissipation efficiency, their lifespan is far less than the theoretical lifespan of 100,000 hours of LED, so it is difficult to be popularized and used.

Water cooling has a good heat dissipation effect but requires a relatively large system, so it is difficult to popularize and use

Images