Electronic system having a fan duct

An electronic system comprising:

• an enclosure comprising a panel;
• a heat sink assembly mounted in the enclosure, comprising a heat sink and a fan attached to the heat sink;
• and
• a fan duct comprising a first open portion and a second open portion, the first open portion comprising a first opening, a pair of opposite lateral flanges having latches buckled to the fan, a guiding rail perpendicularly extended inwardly from each of the lateral flanges and engaging with the fan, a bevel formed at one end of the guiding rail to facilitate mounting of the fan duct to the fan, the second open portion comprising a second opening in communication with the first opening, resilient tabs formed at opposite edges of the second opening and abutting against the panel to prevent the fan duct from moving upwardly, and a step formed adjacent to the first opening and abutting against a top portion of the fan to restrict the fan duct to move downwardly relative to the fan.

An electronic system comprising:

• an enclosure comprising a first panel and a second panel defining a plurality of apertures;
• a printed circuit board mounted on the first panel;
• a heat generating electronic component mounted on the printed circuit board;
• a heat sink mounted on the printed circuit board and thermally engaging with the heat generating electronic component;
• a fan attached to the heat sink for generating a force airflow flowing through the heat sink, the fan having two lateral longitudinal sides;
• and
• a fan duct comprising a first open portion with a first opening located close to the fan, a pair of lateral flanges located at lateral sides of the first opening, respectively, each lateral flange having a guiding rail extending in a direction toward the first opening and a latch, the guiding rail and the latch respectively engaging faces of a corresponding longitudinal side of the fan, and a second open portion defining a second opening communicating with the plurality of apertures of the second panel of the enclosure;
• wherein the first and second openings are oriented to be perpendicular to each other;
• and
• wherein fan duct further comprises at least one resilient tab extending from second open portion beside the second opening and engaging with the second panel.