Fixing structure of drive board capacitor cooling fan

The utility model discloses a fixing structure of a drive board capacitor cooling fan. The fan mounting structure comprises a fan mounting cavity arranged on the back of a base of the frequency converter, the fan placement cavity is located right below the capacitor accommodating cavity on the base of the frequency converter and is communicated with the capacitor accommodating cavity on the base of the frequency converter; wind blown out by a cooling fan accommodated in the fan accommodating cavity directly acts on a capacitor part accommodated in a capacitor accommodating cavity on a base ofthe frequency converter, and the position, corresponding to the fan accommodating cavity, of the bottom of the base of the frequency converter is designed to be of a barrier structure or a hollowed-out structure; the capacitor cooling device has the advantages that the fan accommodating cavity is arranged right below the capacitor accommodating cavity and is communicated with the capacitor accommodating cavity, so that ai