Patent ID: 7542289

Claim:
A computer, comprising: a motherboard with a heat generating component mounted thereon; at least one fan for creating a cooling airflow toward the heat generating component; and an airflow-guiding shield located above the heat generating component, the airflow-guiding shield defining an airflow-guiding channel therein adapted for guiding the airflow created by the fan to the heat generating component in a first direction via the channel, the airflow-guiding shield having an airflow-guiding piece pivotally mounted in the airflow-guiding channel about a pivot extending in a second direction perpendicular to the first direction, the airflow-guiding piece comprising a guiding surface adapted for guiding the airflow, and a blocking surface adapted for blocking the airflow, the airflow-guiding piece being rotatable in the airflow-guiding channel between an airflow-guiding position where the guiding surface is oriented to be substantially parallel to the first direction to allow the airflow to pass therethrough, and an airflow-blocking position where the blocking surface is oriented to face the fan and block the airflow passing therethrough; wherein the airflow-guiding piece comprises an airflow-guiding portion, a top of the airflow-guiding portion serves as the blocking surface thereon, an underside of the airflow-guiding portion serves as the guiding surface thereon, a first part of the guiding surface is parallel to the blocking surface, and a second part of the guiding surface is extended upwardly and slantingly to a free end of the blocking surface.