Led display screen

LED Lamp built-in fan cooling technology is introduced

Current high power LED heat-radiating institutions can be roughly divided into "species" and "passive cooling active cooling" two kinds, the active cooling can divide again forced heat dissipation and adding fan water-cooled heat; In addition, passive cooling can be divided into: natural cooling, heat pipe add fins, mean temperature with fins, circuit board heat pipe technology and so on.

If with hot transfer mode and can be divided into "heat", "heat convection" and "radiation", three ways. Heat conduction in solids medium means by high temperature, heat transfer to low temperature place where the phenomenon. High temperature object quiet place in air, cooling fan cooled, inside or to belong to the convection transfer. Lower fluid temperature, high flow velocity and large contact area, conduce to the effect of thermal convection. Basically, increase power dissipation area, use the material and better heat conduction, are currently tie-in fan solve leds heat dissipation problems commonly used methods.

LED light bulb by open hole design collocation fan air flow direction, can be produced by the waste heat LED bulb with to light bulb within the fast.

Why the heat with fan? Fan has diversion, take a breath, cooling, etc. Various kinds of use and fan is passive air-cooling radiator and active cooling radiator the main difference, no fan cannot called active air-cooled radiator. Cooling radiator is normal work, almost entirely on fan without altering the work state of cooling structure and other circumstances, to use a higher efficiency of the fan, can make cooling radiator efficiency greatly ascend. Use fan heat can reduce weight and size products, not only increase the cooling effectiveness, more can make products lightweight.

General fan has long-term widely used in electronic system, air conditioning cooling ventilation system, automotive engine cooling, etc. Including electronic system including laptop, desktop computers, servers or communication systems; Air conditioning cooling ventilation system, including air conditioners heat exchanger, platoon ventilation fan, etc.; And car engine cooling or so-called engine cooling fan.

LED Lamps built-in buy fan differences between cooling or not.

Fan is mainly by moving heat principle leaves its mobile, promoting fluid flow, can cause the way through forced convection radiator heat away. LED light bulb by open hole design collocation fan air flow direction, can be produced by the waste heat LED bulb with to light bulb within the fast. LED a cooling fan is more suitable for application in high wattage LED light bulb heat dissipation, such as LED PAR light series, LED lamp & hellip; patio And so on.

The same size LED lights, use the space of yankees fan can make LED temperature dropped to about 52 version ° C or so, weight is about 130g. Traditional cooling pattern (such as extruded aluminum/die cast aluminum metal radiator) LED base version temperature is about 70 ° C or so, 200g near1y.

Consider for the noise of the experience, users of LED lighting fan for low noise design fan, and generally are smaller than 20Dba noise performance, the human ear be aware of not easily (test standard: environmental temperature 20-23 degrees, humidity usually based on 50 ~ 70%. According to this point, LED dengpaoan force Ecomaa Ming photoelectric (ambience, said the company adopts) to the parent company force patent technology magnet oil-retaining Bearing motor (management - mag), use the sliding friction according the sleeve, can reduce fan Bearing runtime abrasion of noise.

Force photoelectric points out, the tie-in radiator design can make fan, reducing vortex flow more smooth happens, using the speed control lower airflow noise. Leds development process will use half without ring room for noise assessment, further confirmation of the lamp design would too high. The noise value

LED lighting on the weight of heat or not use fan comparison.

In fan life, current force of the photoelectric use is MTTF (on fan life expectancy time) test, test conditions for 70 ° C temperature environment for a certain number of fan, and confirm the roast whether normal operation. The warranty is currently fan in 2 years. As for the fan's power consumption, to current use of 5.5 V axial flow fan for example, its power consumption is about 0.55 W.

In addition, there is the problem about fan dust collection, generally speaking, dust or cotton may indeed would gather in power module, but will not therefore affect fan noise of life or cause. In the past years experimental results, at present there is no appeared fan have failed because of the dust or cotton.

from: http://leddisplaypanel.blog.sohu.com/172368900.html