Flow rectifier for an axial fan

A flow rectifier for an axial fan, having a base body, comprising two or more rings arranged in a radial sequence, each delimited radially by cylindrical inside and outside curved surface areas, a plurality of air guide blades, which are distributed in a circumferential direction about a longitudinal axis, and which are disposed in a generally radial manner such that they extend between the curved surface areas, wherein, when viewed in a circumferential direction, the plurality of air guide blades extend with a first curvature relative to an axial direction, each air guide blade extending between an inflow-side blade edge and an outflow-side blade edge, and wherein the plurality of air guide blades have an axial height that varies in a radial direction such that the outflow-side blade edges of each air guide blade follow a radial path that defines defining a second curvature that is a circular arc-shaped curvature, wherein the second curvature has a first end portion extending generally parallel to the axial direction and a second end portion extending generally parallel to the radial direction.