Central air-conditioning cleaning and disinfection to avoid "legionella"

"Legionella", also known as "Legionella pneumophila", is a pathogen that easily causes diseases of the respiratory system, especially the lungs. After infection, it often causes symptoms such as cough and fever, leading to pneumonia. In severe cases, it can cause respiratory failure, renal failure, and even death.

 

       As early as 2004, the disease control department began to conduct sanitation inspections on central air conditioners in public places. For the past 10 years, "Legionella" has been detected in the cooling water of central air conditioners almost every year.

 

       According to disease control experts, the cooling water essential for air-conditioning refrigeration is a breeding ground for "Legionella". It is easy to reproduce in large numbers. If the cooling water is polluted, "Legionella" is very likely to be transported to various places in the room along the air-conditioning pipeline, such as each room in a hotel.

 

       According to the "Central Air Conditioning Ventilation System Hygiene Standards" formulated by the state, it is required that central air conditioners in public places must be cleaned and disinfected before use. If the centralized air-conditioning and ventilation system fails to meet the hygienic requirements, it is deemed that the sanitation facilities in public places do not meet the hygienic standards and requirements, and no new or renewed public place sanitation permits will be issued. Therefore, operators of public places are becoming more and more aware of cleaning central air conditioners.

 

       It is worth noting that there are no strict requirements for some office buildings that use central air conditioning, such as banks and commercial office buildings, which has become a major "blind spot" for central air conditioning cleaning. "The country has no compulsory measures, and whether it can be cleaned on a regular basis mainly depends on the self-discipline of the relevant units. Because the cleaning cost of the central air conditioner is relatively high, a comprehensive cleaning of a larger area costs at least tens of thousands or even hundreds of thousands of yuan, so many units have not been cleaned for many years Central air-conditioning. Experts said that to eliminate "legionella", it is necessary to regularly clean and disinfect the cooling water, ventilation pipes, and air outlets of the central air-conditioning, preferably once a year.