3、Commonly used in cooling water treatment technology
 For normal operation of refrigeration units and the elimination of bacteria cooling tower problems, the cooling water system and must be strict quality control and management. At present, the cooling water system, in addition to taking a small amount of no treatment or simply to control the scaling or corrosion of sewage outside (do not run the way of dosage, the surface, what a short time no serious problems. In fact, 2 to 3 Years later, the consequences will be significant exposure and serious accidents caused irreparable. If one take the sewage, it must be frequent, serious waste of water.) Majority of works on water treatment technologies can be divided into two categories (see Table 2). One is the medication regularly discharge + filter + method, another way of electromagnetic (including static electricity, electronics) processing + filter. The latter include electromagnetic water processor, static water processor, processors and high-frequency electronic water and other types of electronic water processor (sometimes referred to as electronic water processor.) Drug treatment is a common water treatment method, the cooling water treatment in the more common, to sterilization, corrosion, anti fouling, but there are high operating costs, operational problems and other shortcomings. Electronic water treatment method is a new water treatment method, less operating costs, simple operation, but there are immature technology, the treatment effect is not a comprehensive one, failure and other issues.
 Table 2 Common central air conditioning cooling water treatment technology