Dustproof frequency converter

The utility model discloses a dustproof frequency converter. The dustproof frequency converter comprises a casing, wherein the bottom board of the casing is provided with an air inlet, the top board of the casing is provided with an air outlet, the air outlet is provided with an axial-flow fan, the casing further comprises a tubular skirtboard arranged below the bottom board, the tubular skirtboard is provided with multiple air inlet holes circumferentially, the tubular skirtboard is internally provided with a dust filtering device, the dust filtering device comprises an upper transverse board fixed in the tubular skirtboard, a lower transverse board connected with the upper transverse board through a bolt, and an annular filtering net arranged between the upper transverse board and the lower transverse board, and the upper transverse board is provided with air outlet holes communicated with an inner chamber of the annular filtering net. According to the dustproof frequency converter, the dust filtering device is arranged in the tubular skirtboard at the lower portion of the frequency converter casing, dusts are prevented from entering the frequency converter casing to damage components, the fault rate of the frequency converter can be reduced, and service life of the frequency converter is prolonged.