Integrated fan

An integrated fan includes a centrifugal blade unit and a frame. The centrifugal blade unit has a hub. The frame is used for accommodating the centrifugal blade unit. The frame includes a first casing, a second casing and at least one airflow-guiding plate. The first casing includes a main plate and an airflow inlet, wherein the airflow inlet is disposed in the main plate and aligned with the hub. The second casing is opposed to the main plate of the first casing. The at least one airflow-guiding plate is aslant and externally extended from an edge of the main plate. The airflow-guiding plate, the first casing and the second casing collectively define an airflow output channel. An included angle between an airflow-leaving direction of the airflow output channel and an airflow-entering direction of the airflow inlet is ranged between 90 and 180 degrees.