Impeller and fan

Embodiments of the present application provide an impeller and a fan, the impeller rotating about a central axis, the impeller having: a cup portion formed in a bottomed cylindrical shape about the central axis, the cup portion having a bottom portion and a cylindrical portion; a plurality of blades located at the outer periphery of the cup part; the impeller includes a cup portion, a plurality ofblades disposed in the cup portion, and an annular member connected to one axial ends of the plurality of blades, in which the impeller further includes auxiliary blades extending in a radial direction from a first axial position of an outer peripheral surface of the cup portion, and in which radially outermost ends of the auxiliary blades do not coincide with radially outermost ends of the blades when viewed in an axial direction. According to the impeller provided by the embodiment of the utility model, the cooling effect can be uniformly achieved. 本申请实施例提供一种叶轮和风扇，所述叶轮以中心轴线为中心进行旋转，所述叶轮具有：杯部，所述杯部以所述中心轴线为中心形成为有底筒状，具有