After long-term operation of the unit, the surface of the evaporator will become very dirty. In some places, the oil stain is serious, and the surface of the evaporator will be covered with a layer of oil film. As a result, the refrigerant of the unit system and the external environment can not exchange heat normally, the refrigerant can not evaporate and absorb heat normally, the suction capacity of the compressor decreases, the compression ratio increases, the heating capacity of the system decreases, and the load of the compressor increases, It is easy to cause system failure, so in some areas with bad operating conditions, the evaporator must be cleaned regularly. Therefore, in general, the fin heat exchanger should be cleaned after the unit has been running for 6-12 months, and the cleaning cycle should be shortened when the surrounding environment is polluted. Picture cleaning methods: 1. Cut off the power supply; 2. The fins are repeatedly washed by high pressure gas against the air inlet direction of the heat exchanger. When washing, it should be perpendicular to the fin direction to prevent the fin from turning over. 3. It can also be washed with high pressure water. When washing with high-pressure water, the water pressure should be controlled, the fins should be prevented from falling, and the electrical components should be protected. If the fins are stained with oily substances, wash them with water with neutral detergent; 4. You can use a vacuum cleaner with a nylon brush to clean the dust and debris on the surface of the heat exchanger. Finally, if the primary color of the fins can be seen or the water left by the fins is pure water, the cleaning is completed. Daily maintenance: do not pile up sundries on the unit and its accessories, keep dry, clean and well ventilated around. In case of serious ash deposition on the condenser fins, it should be cleaned in time, so as not to affect the unit performance or cause the unit protection shutdown. Today's content is introduced to this, more wonderful content, please look forward to!