The heat sink is an invisible pollution
In 2011, China CDC, Shanghai CDC and Fudan University School of Public Health conducted field air-conditioning household surveys in Shanghai, Beijing, and Shenzhen. The results showed that 88% of the air-conditioning fins exceeded the standard and 84% of the air-conditioning fins. The total number of molds exceeded the standard. The average value is nearly 40 times higher than the standard, and the most serious bacteria detected are up to 91259/cm2, which is nearly 100 times higher than the standard.
The heat sink is the only place where air is in the air conditioner. The dust and dirt in the air accumulate on the heat sink, coupled with the humid environment caused by the condensate of the air conditioner and the suitable temperature during the operation of the air conditioner, causing a large number of bacteria to grow. The heat sink is the most viscous place, because its fine sheet structure allows contaminants to penetrate deep into it, while the surface cleaning can not completely remove the internal dirt and germs. In addition, the heat sink is delicate and delicate, and can not be brushed.
Heat sink contamination is invisible compared to filter contamination, but this hidden pollution is more harmful. If the air conditioner is not cleaned for a long time, the number of negative ions in the air will gradually decrease, and the immune function of the human body will be weakened unconsciously.
Air conditioning is best used for monthly cleaning
In the investigation of the wall-mounted air-conditioning heat sink pollution in a community in Shanghai, the bacterial and fungal contamination rates of the three sampling sites (residential, office, public places) exceeded 80%, and the bacterial over-standard rate in public places reached 95%.
The cleaning of the heat sink is a difficult problem. Non-professionals can't disassemble it. It can only be washed in situ, while the heat sink is soft and can't be brushed. It may also cause short circuit of air conditioner.
If you have the conditions, it is best to use professional air conditioning cleaners for cleaning and disinfection. You can also use professional air-conditioner cleaning agent, no need to disassemble the air conditioner, and clean and disinfect it before the new air conditioner is used for the first time, the old machine is used again after changing seasons or after being idle for a period of time. If the smell is bad during the use of the air conditioner, the cooling effect is not good, or the filter dust is more, it should be disinfected as soon as possible. Clean and disinfect the air conditioner at least once a month.
â– Related investigation
Other data 1: 20 households in the Langfang in the north and Shaoguan in the south of China's CDC environment were selected for household inspection. In Shaoguan, the average number of bacteria in the room is 1532/m3, and the fungus is 773/m3. In Langfang, the two figures are 645 and 492 respectively.
Other data 2: Of the 103 people who participated in the survey in a community in Shanghai, 89 people knew that the air conditioning filter was polluted, and 37 people knew that the heat sink was also polluted. 24 and 15 people knew about the contamination of the outer casing and the drain pipe.
â– Small link
What are the pathogens in the air conditioner?
1. Listeria can cause food poisoning. Healthy adults may have mild flu-like symptoms after infection. Sudden fever, severe headache, nausea, vomiting, diarrhea, sepsis, meningitis, and miscarriage in pregnant women.
2. Dry Corynebacterium can cause sepsis and endocarditis.
3. Staphylococcus including Staphylococcus aureus, Staphylococcus aureus, mimicking staphylococcus, hemolytic staphylococcus, can cause pharyngitis, respiratory infections, nosocomial infections, purulent infections and sepsis.
4. Bacillus cereus can cause food poisoning.
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