Xi'an central air conditioner installation : Central air conditioner system What are the types and methods for cleaning?
Central air conditioner system cleaning is mainly divided into two categories: internal and external cleaning. Inner cleaning, the refrigeration and cooling water reincarnation system, external cleaning, cooling tower filler water collection tray cleaning, air alternator external surface air conditioner cleaning , central air conditioner cleaning , air conditioner cleaning agent cleaning, ventilation pipe system cleaning. For energy saving, it is better to clean the water system (searching evaporator of of of of chiller, meter cooler of air conditioning unit), cooling water system (cooling water pipe, condenser , cooling tower filler), and for environmental protection and hygiene, the first thing is to clean the ventilation duct system and the end accessories (cooling, heating, humidifier, filter, condensate pipe, water tray, feeding, return air outlet and other accessories of air conditioning unit).
Methods for cleaning central air conditioners
1, cleaning of air conditioners
Because the first adhesion of the air conditioner water pipes is Ca2+, Mg2+, Fe2+ and other compounds are scale, which is neutral. Use 8‰~10‰ neutral descaling agent , corrosion inhibitor , and coating aqueous solution to clean three times. The first time is continuous reincarnation for 12 hours, the second time is continuous reincarnation for 6 hours, the third time is continuous reincarnation for 1 hour, and the water quality and surface conditions of the water pipe are timely detected. In general, it can be cleaned after three times. For air conditioning water pipes that have not been cleaned for a long time, it should be extended when cleaning the third time.
2, cleaning of cooling water system
Because most cooling water systems are open reincarnation systems, the cooling water comes into contact with the air for a long time, and gases such as CO2, SO2, NO2, O2 in the air will melt into the cooling water and show acidity and strong oxidation (such as cavitation of the impeller of the cooling water pump ). After a day or a night, the cooling water pipe, the filler surface, and the water collection plate form a pathogenic microorganism attachment containing Legionella pneumophila, b-hemolytic streptococci, algae, O2+ and other pathogenic microorganisms, seriously corrode the water pipe and polluting conditions (the cooling tower is approaching acid rain). Therefore, when cleaning, weak acid cleaning agent is used, and 5‰ weak acid descaling agent, corrosion inhibitor, and coating aqueous solution are used for cleaning three times, and the cleaning sequence is the same as above.
3. Cleaning of ventilation duct system
Cleaning of ventilation duct system is a key difficulty in cleaning obligations, because ventilation ducts are commonly found in the ceiling. Even if they are not in the ceiling, it is difficult to clean because the air ducts are sealed and connected, and mechanical cleaning methods are often used. The common cleaning method at present is to place the detection robot or air thought robot in the ventilation duct from the soft joint of the unit's canvas, and control the cleaning robot in the ventilation duct through the robot control box outside the pipeline. For pipeline systems with a large amount of dust, the air duct dust collector must be used to fully collect the residue in the pipeline to prevent secondary pollution.
4, surface cooling, heating, humidifier surface, condensate plate interior and interior surface, return air outlet cleaning The surface cooling, heating, humidifier, and return air outlet cleaning can not only improve air quality, but also have strong energy-saving consequences.
Commonly used air conditioner cleaning, central air conditioner cleaning, air conditioner cleaning agent cleaning method is to use air spray cleaning agent, then purge with high-pressure water or air to make the turbidity melt and be purged and lost, and then rinse it with low-pressure water. The contaminants attached to the outer surface of the surface cooler contain pathogenic microorganisms such as hemolytic streptococci. Most of the fins flow into the condensate water tray after cleaning. Long-term backlog will constitute secondary pollution of the water tray and accompanied by odor. Therefore, the cleaning of the condensate tray is not ignored. The commonly used method for cleaning condensate tray is to spray cleaner on the condensate tray and then rinse it with clean water.
5, cleaning of cooling water system
Because most cooling water systems are open reincarnation systems, the cooling water comes into contact with the air for a long time, and the CO2, SO2, NO2, O2 and other gases in the air will melt into the cooling water and show acidity and strong oxidation (such as cavitation of the impeller of the cooling water pump). After a day or a night, the cooling water pipe, the filler surface, and the water collection plate form a pathogenic microorganism attachment containing Legionella pneumophila, b-hemolytic streptococci, algae, O2+ and other pathogenic microorganisms, seriously corrode the water pipes and polluting conditions (acid rain is coming close to the cooling tower). Therefore, when cleaning, weak acid cleaning agent is used, and 5‰ weak acid descaling agent, corrosion inhibitor, and coating aqueous solution are used for cleaning three times, and the cleaning sequence is the same as above.
6. Cleaning of ventilation duct system
Cleaning of ventilation duct system is a key difficulty in cleaning obligations, because ventilation ducts are commonly found in the ceiling. Even if they are not in the ceiling, it is difficult to clean because the air ducts are sealed and connected, and mechanical cleaning methods are often used. The common cleaning method at present is to place the detection robot or air thought robot in the ventilation duct from the soft joint of the unit's canvas, and control the cleaning robot in the ventilation duct through the robot control box outside the pipeline. For pipeline systems with a large amount of dust, the air duct dust collector must be used to fully collect the residue in the pipeline to prevent secondary pollution.
