LED display pixels due to intensive heat itself is large, long time outdoor use, the internal temperature will gradually rise, especially in a relatively large area of the outdoor LED display heat dissipation becomes a must pay attention to the problem, LED display heat indirectly affect the service life of the LED display, or even directly affect the normal use and safety LED display. How to dissipate heat has become a problem for display.
When choosing the heat dissipation mode, the following factors should be considered: heat flux, volume power density, total power consumption, surface area, volume, working environment conditions (temperature, humidity, air pressure, dust, etc.) of LED display.
According to the heat transfer mechanism, there are natural cooling, forced air cooling, direct liquid cooling, evaporative cooling, thermoelectric cooling, Heat pipe heat transfer and other heat dissipation methods.
Design method of heat dissipation for outdoor LED display
The heat exchange area of the heating electronic component and the cold air, and the temperature difference between the heating electronic component and the cold air, directly affect the heat dissipation effect. This involves the design of air volume into the LED display box, the design of the air duct. Ventilation duct design, as far as possible the use of straight pipes to transport air, to avoid sharp bend and bend of the pipe. Ventilation ducts should avoid sudden expansion or sudden contraction. The extended angle should not exceed 20o, contraction of the cone angle of not more than 60o. The ventilation pipe should be sealed as far as possible, all the lap should flow along the direction.
Outdoor LED display cabinet design, there are several points to note
The intake holes should be set on the lower side of the box, but not too low so as to prevent dirt and water from entering the box which is installed on the floor.
The vent shall be mounted near the upper side of the cabinet.
The air shall be circulating from the bottom of the cabinet, and a dedicated air inlet or vent shall be used.
The cooling air shall flow through the heating and electronic components, and the air flow shall be prevented from short circuited.
The filter screen shall be installed in the air inlet and outlet to prevent sundries from entering the box.
Natural convection should be designed to aid forced convection
When designing, make sure the intake port is far from the exhaust port. Avoid repeated use of cooling air.
Make sure that the direction of the radiator is parallel to the direction of the wind, and that the alveolus of the radiator does not block the air path.
Fan installed in the system, due to structural limitations, the air inlet and outlet are often subject to a variety of barriers, and its performance curve will change. According to the actual experience, the fan inlet and outlet is best to have 40mm distance from the barrier. If there is space limitation, there should be at least 20mm.
Outdoor LED display maintenance program, a good heat dissipation measures, two is to use, should avoid improper operation. It is generally recommended to configure fans or air conditioners to enhance heat dissipation.
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