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target="_blank">户外LED昄?/a>散热则变成一个必重视的问题QLED昄屏散热间接媄响着LED昄屏的使用寿命Q甚至直接媄响到LED昄屏的正常使用和安全。如何散热也成了昄屏必考虑的问题?br /> 热量的传递有三种基本方式Q导热、对和辐射?br /> <p> 导热Q气体导热是由气体分子不规则q动时互相碰撞的l果。金属导体中的导热主要靠自由电子的运动来完成。非导电Z中的导热是通过晶格l构的振动实现的。液体中的导热机理主要靠ҎL的作用?</p> <p> <img style="max-width:100%;" src="/uploads/image/20210429/20210429140829_8855.jpg" alt="户外LED昄屏怎样散热" /> </p> ҎQ指体各部分之间发生相对位UL所引v的热量传递过E。对仅发生在流体中Q且必然伴随着有导热现象。流体流q某物体表面时所发生的热交换q程Q称为对换热。由体L各部分的密度不同所引v的对称自然Ҏ。若体的运动由外力(风扇{?引v的,则称为强q对?br /> 辐射Q物体以늣波Ş式传递能力的q程UCؓ热辐。辐能在真IZ传递能量,且有能量形式的{换,即热能{换ؓ辐射能及辐射能{换成热能?br /> 选择散热方式Ӟ应考虑下列因素Qled昄屏的热流密度、体U功率密度、d耗、表面积、体U、工作环境条?温度、湿度、气压、尘埃等){?br /> 按传热机理,有自然冷却、强q空气冷却、直接液体冷?蒸发冷却;热电致冷;热管传热{散热方式?br /> 散热设计Ҏ<br /> 发热电子雉件与冷风的热交换面积Q发热电子零部g与冷风的温度差,直接影响散热效果。这涉及进入led昄屏箱体的风量大小设计Q风道的设计。通风道设计Ӟ量采用直管道输送空气,避免采用急剧拐弯和弯曲的道。通风道应避免骤然扩展或骤然收羃。扩展的张角不要过20oQ收~的锥角不要大于60o。通风道应尽量密,所有搭接都应顺着动方向?br /> </div> <div class="pagess"> <ul> <li><div>上一?<a href="144.html">LED昄屏花屏故障该如何解决?/a></div> <div>下一?<a href="142.html">LED昄屏操作留意事?/a></div> </li> </ul> </div> <div 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