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用于在辐射霜冻对应的大气条件下产生冷空气隔离屏障的装置
Device for the creation of containment barriers for cold air in atmospheric conditions corresponding to radiation frosts
US-7654035-B2用于在霜冻时产生气动屏障，保护作物免受冷空气侵袭。
专利摘要
一种用于产生气动屏障的方法，该装置在与辐射霜冻相关的分层大气中运行。该装置通过垂直轴的轴流风扇将靠近地面的冷而密集的空气向上推进到弯头，迫使气流转弯90°。从装置出口部分排出的气流形成水平轴的射流。射流的垂直横截面垂直于其轴，呈矩形，其边随距出口的距离而增长。射流携带的动量能够在距出口一定距离处产生适合射流截面的气动屏障。该气动屏障面对比射流输送的空气更冷更密集的气团，并阻止这种更冷更密集的空气向装置推进。
Original abstractA method for generating a pneumatic barrier with a device that operates in a stratified atmosphere associated with the occurrence of radiation frost. This device takes cold and dense air found close to the ground by means of an axial fan with a vertical axle that propels the air upward to an elbow that forces the airflow to make a 90° turn. The airflow discharged from the device through the outlet section forms a jet with a horizontal axis. The jet's vertical cross-section, perpendicular to its axis, has a rectangular shape and sides that grow with the distance to the outlet. The momentum transported by the jet is able to create at a certain distance from the outlet a pneumatic barrier that fits the jet's section. This pneumatic barrier faces an air mass that is colder and denser than the air transported by the jet and prevents such colder and denser air from advancing toward the device.
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