Patent attributes
A computer enclosure includes a casing defining a ventilation hole at one side thereof, a power supply and a cooling fan received in the casing. Heat generated by the power supply is taken out by an airflow generated by the cooling fan to an outside of the casing via the ventilation hole. At least one cover sheet covers the ventilation hole of the casing. One side of the cover sheet is pivotally connected to the casing so that the cover sheet is rotatable with respect to the casing. When the cooling fan works, an airflow produced by the cooling fan flows to the ventilation hole and pushes the cover sheet to rotate with respect to the casing, and thus the ventilation hole is exposed; when the cooling fan ceases to work, the cover sheet falls off due to a weight thereof and the cover sheet fully covers the ventilation hole.
