Frequency converter having waterproof function

The utility model discloses a frequency converter having the waterproof function. The frequency converter comprises a casing, wherein the lower portion of the casing is a skirtboard, the skirtboard is internally provided with an upper baffle board and a lower baffle board, the upper baffle board is provided with upper choke boards, the lower baffle board is provided with lower choke boards, the upper choke boards and the lower choke boards are arranged in a staggered mode, the skirtboard between the upper choke boards and the lower choke boards is distributed with multiple air inlet holes circumferentially, the upper baffle board is provided with an air outlet hole, and the air outlet hole is arranged in the inner-most-layer upper choke board. According to the frequency converter, the upper choke boards and the lower choke boards arranged in the staggered mode are arranged in the square tubular skirtboard at the lower portion of the frequency converter casing, so an air flow is enabled to form U-shaped tortuous flow among the upper choke boards and the lower choke boards, moisture contained in the air flow can be intercepted by the choke boards when the choke boards contact with the air flow, moisture separation is realized, and moisture is prevented from entering the frequency converter casing to damage components, the fault rate of the frequency converter is low, and service life of the frequency converter is prolonged.