Introduction to the classification and use of central air-conditioning cleaning agents
The central air-conditioning cleaning agent is a special cleaning agent for the circulating cooling water and chilled water systems of the air-conditioning refrigeration unit. It is used for cleaning and descaling on the cooling circulating water side of the central air conditioning, and finally cleaning the cooling circulating water side of the central air conditioning and improving the cooling efficiency of the circulating water. Restore the cooling effect of the central air conditioner, save the power of the engine, and prolong the service life of the central air conditioner.
As a special cleaning agent for central air-conditioning cleaning, the central air-conditioning cleaning agent has a wide variety of products and different methods of use.
1. Types of central air conditioner cleaners
1. Cleaning agent for galvanized parts
Scope of application: Model -HL-759, suitable for degreasing and degreasing cleaning of galvanized steel sheet, iron sheet, aluminum and other parts, and can replace flammable petroleum solvent and caustic alkali. This product does not contain carbon tetrachloride, benzene and other toxic and flammable substances, and does not corrode metals.
How to use: In the cleaning tank, prepare an aqueous solution containing 5-10% of this product, raise the temperature to 50-60 °C, use immersion or ultrasonic cleaning for 5-10 minutes, then rinse with clean water, and proceed to the next process or drying. Spray process after drying.
2. Carbon deposit cleaning agent
Scope of application: The model is -HL-739, which is mainly used to remove the equipment parts of the air compressor and the heat-conducting oil combustion product deposits online. It is suitable for cleaning of various types of oil and carbon deposits.
How to use: Drain 10% of the oil in the system first, then add this product, run for 24 hours, drain the oil in the system, and add new oil to run normally.
3. Carbon pollution cleaning agent
Scope of application: The model is -HL-731, which is mainly used to remove diesel engine pistons, annular valves and other equipment parts where combustion products are deposited.
How to use: 1. Soak; 2. Brush.
Second, the scope of application of central air conditioning cleaning agent
The central air-conditioning cleaning agent is suitable for various types of air-conditioning units. It can clean the circulating water system and low-temperature water system of the condenser, evaporator and absorber of the central air-conditioning unit, hot water boilers and water-cooling jackets of diesel generator sets. Applicable materials: Materials such as copper, copper-nickel alloys, carbon steel, aluminum, titanium and stainless steel.
3. How to use the central air conditioner cleaning agent
1. Chemical cleaning process
Water flushing→pickling descaling→water flushing→passivation; disconnect other systems unrelated to the cooling coil, connect the cleaning tank, cleaning pump and cooling coil to form a cleaning closed loop; in the simulated cleaning state, the cleaning system Check the leakage of the coil, and remove the loose dirt in the coil at the same time. When there is no large particle impurities in the flushing water at the outlet, the water flushing ends; add "central air conditioner cleaning agent" in the cleaning tank to control the concentration of the main cleaning agent. In the range of 3-6%, the temperature is in the range of 50-60 ℃, cycle cleaning and decontamination are carried out in the system, and the cleaning time is about 2-3 hours.
2. Passivation treatment
Regularly measure the pH value of the acid solution with pH test paper (1 time/20 minutes) to keep it below 1. When the pH value tends to be stable within half an hour and no gas is released in the cleaning system, the pickling process is ended; After the cleaning process is completed, rinse with water to rinse residual sludge and residues. When there are not many impurities at the outlet and the pH value is greater than 6, the water rinse is completed; after the water rinse is qualified, the "passivation pre-filming agent" is added cyclically for passivation. Treatment to improve the corrosion resistance of copper pipes. After the concentration of the whole system solution is evenly mixed, stop the circulation and soak for 2-3 hours. The passivation solution is drained out of the system, and the cleaning process is over
After the central air conditioner is used for a period of time, a large amount of dust and dirt will accumulate on the filter, evaporator and air supply system, resulting in a large amount of bacteria and viruses. If not cleaned and sterilized, these harmful substances will not only pollute the indoor air and endanger human health, but also the air output and return air volume of the central air conditioner will gradually decrease, which will affect the cooling effect. If the long-term cooling effect is poor, it will also affect the life of the central air conditioner or compressor.
