An axial fan (1) with a motor comprising a stator (2) and a rotor (3) where the blades (4) are protruding from an outer periphery (U3) of the rotor (3), which is configured as a wheel fan, which moves a gaseous medium in a main flow direction directed axially (S) from an input side (E) to an exit side (A), where a guide element flow rotationally symmetrical (5) is mounted on the outlet side (a) directly or indirectly on the stator (2), concentric to a hub of the stator (2a), the guide element flow (5) an outer diameter (D5) which is greater than a outer diameter (D2) of the hub of the stator (2a) larger than an outer diameter (D3) of the rotor (3) and smaller than a diameter (D4) of a perimeter (U4) around the blades (4), characterized that the outer diameter (D5) of the flow guide (5) is dimensioned according to the formula D5 D3 + = (0.2 ... 0.3) * (D4 - D3) where the guiding flow channel (5) is configured in basic conical shape, where the envelope surface (5a) is diverging stator (2) oriented in the opposite direction when assembled direction, and where the envelope surface (5a ) of the flow guide (5) runs at an angle (μ) with respect to a longitudinal axis of the fan, which is not less than 30 °.
展开▼
