Axial, diagonal or radial fan with hub profile

The invention relates to an axial-flow, diagonal-flow or radial-flow fan, comprising an impeller driven by an electric outer rotor motor, which impeller comprises a hub ring carrying blades and which is connected to the rotor in a rotationally fixed manner and on which a hub contour is provided on the inflow side, the hub profile includes a diverting outer surface and a central opening connected radially inward to the outer surface, the central opening having an inner surface directed toward the rotor. 本发明涉及一种轴流式、斜流式或径流式风扇，其具有由电动外转子马达驱动的叶轮，该叶轮包括承载叶片的轮毂环，并且该轮毂环不能相对转动地与转子连接，并且在所述轮毂环上在流入侧设置有轮毂轮廓，所述轮毂轮廓包括导流外表面和径向向内连接到所述外表面上的中心开口，该中心开口具有指向所述转子的内表面。