A water softener is a water treatment product that softens water quality by removing hardness ions such as calcium and magnesium from water, reducing water hardness. Cation resin exchange is currently a relatively mature and widely applied softening method in the market. The resin adsorbs hardness ions such as calcium and magnesium in water. When it reaches a certain level, it is regenerated with sodium chloride to restore the adsorption capacity of the resin