用于保护树木免受冻害，通过热气流保护树冠。
专利摘要
一种用于保护标本树免受严重寒冷天气损害的便携式装置。该装置包括中空壳体，优选具有大致扁平的构造，其水平尺寸适于定位在树的树冠周边宽度下方，并且基本上小于树冠周边宽度。空气移动源安装在壳体内，并布置成优选通过其下面板中的孔将空气吸入壳体中。空气排放口形成在所述壳体的边缘周边周围，用于排放由空气移动源产生的通常横向或径向向外排出的空气。地面支撑件可连接到并用于将壳体保持在地面上方和树冠下方，使得排出的空气保护性地与树叶混合，并在树叶周围产生气流。还提供了一种空气热源，其增强了对树叶的保护。
Original abstractA portable apparatus for protecting a specimen tree from substantial cold weather damage. The apparatus includes a hollow housing preferably having a generally flattened configuration and being adapted in horizontal size for positioning beneath, and being substantially smaller than, a canopy perimeter width of the tree. An air movement source is mounted within, and arranged to draw air into the housing preferably through apertures in a lower panel thereof. Air discharge openings are formed around an edge perimeter of said housing for discharging air generally laterally or radially outwardly therefrom produced by the air movement source. A ground support is connectable to and for holding the housing above the ground and beneath a canopy of the tree so that discharging air protectively intermingles with, and produces airflow around the foliage of the tree. An air heat source is also provided which enhances foliage protection.
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