US Patent 11773575 Drainage net for suppressing biofilm formation

The present invention provides a drainage net for suppressing biofilm formation, the drainage net including a drainage net main body having a cylindrical structure opened at an upper side thereof and having drainage holes, a first electrode disposed outside or inside the main body, a second electrode grounded, spaced apart from the first electrode at a predetermined interval, and disposed outside or inside the main body, and a voltage supply unit configured to apply, to the first electrode, at least one of an alternating current (AC) voltage, a direct current (DC) voltage, and a voltage in which the AC voltage and the DC voltage are superimposed.