| 摘要 |
<p>In a cooling structure of a rack for electronic devices, in which a plurality of shelf units are vertically stacked in a cabinet, each of said shelf units holding a plurality of printed boards and having ventilation holes in the upper and lower surfaces, wherein individual cooling blocks are formed, each provided with a fan unit having at least one fan and mounted on each of the shelf units, the cooling air is made to flow linearly through the shelf units by the fan unit of each cooling block from the lower position toward the higher position, the external air is introduced through ventilation holes formed in the side surfaces of the fan units and is mixed with the cooling air by taking advantage of the flow speed of the cooling air, and the flow rate of the cooling air is gradually increased as it goes toward the upper cooling blocks by the use of the blowing force that is added up as the cooling air flows upward through the fan units.</p> |
