The Fulike softened water system consists of three parts, namely ion exchange part, salt regeneration part, and control part. Ion exchange technology is the working principle of softening systems, and its main body is ion exchange resin. As the hardness of water is mainly formed and represented by calcium and magnesium, cation exchange resin is generally used to replace Ca2+and Mg2+(the main components that form scale) in water. As the Ca2+and Mg2+in the resin increase, the efficiency of removing Ca2+and Mg2+gradually decreases. Therefore, after using the softened water equipment for a period of time, it is necessary to use a salt regeneration part to regenerate the resin, restore its efficiency, and improve its service life.