| 摘要 |
A power supply unit (PSU) 10 has walls 11-15 which define an internal volume of the PSU 10. A metal sheet forming left and right side walls 12. 14 and an upper wall 11 is provided with plural perforations on each of those walls. The perforations are circular in shape, and formed in a regular grid pattern. Th e perforations are formed by punching the metal sheet before it is bent into shape. The perforations in the housing of the PSU 10 allow hotspots to be carried through the walls of the housing of the PSU, following which the, hotspots are unabl e to damage internal components of the PSU. This allows the use of reduced flow rate fans.
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