A DCW hypochlorous acid generator can be installed. This equipment uses the electrolysis of salt and water to generate hypochlorous acid sterilization solution, which is non-toxic and can be degraded into salt and water after sterilization, leaving no residue, no corrosion, and no irritating smell. Relying on the oxidizing properties of hypochlorous acid, it can quickly and broadly kill various bacterial microorganisms, decompose organic matter, and completely remove biofilms on the inner walls of waterways. This kind of equipment is simple to install, occupies a small area, operates intelligently, and does not require personnel on duty.