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 Beijing Zhonghuan environmental quality monitoring center professional third party environmental monitoring and testing agency
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Daily inspection of central air conditioning ventilation system

Brief introduction of sanitary inspection of air conditioning system
With the development of economy and the improvement of people's living standards, central air conditioning is more and more widely used in hotels, shopping malls, hospitals, supermarkets and office buildings and other public places to regulate the indoor air temperature, humidity, wind speed and other micro climate. However, central air conditioning and ventilation system has become one of the main sources of indoor air pollution due to its pollution and unreasonable use. For example, the long-term operation of the central air-conditioning system, no cleaning and disinfection or incomplete cleaning and disinfection, often lead to the internal pollution of the ventilation system. When the central air-conditioning is turned on, pollutants are brought into the room, which makes the central air-conditioning system become the medium of pollutant transmission and diffusion. There are dozens of kinds of human health damage and diseases caused by central air conditioning and ventilation system, but there are mainly three kinds of diseases: infectious diseases (such as Legionella disease), allergic diseases (allergic rhinitis, etc.) and adverse building syndrome.

Legionella disease
The cooling tower of central air conditioning system is very suitable for Legionella growth. The circulating water (including inorganic salts, organic matter and microorganism) in the cooling tower can not only provide ideal living environment for Legionella, but also provide aerosol, an important carrier of Legionella. After the circulating water of cooling tower is polluted by Legionella, it is pumped into the room through the air inlet, doors and windows and ventilation pipes of central air conditioner or forms aerosol in a certain range (within 200 meters) around the cooling tower. People will be infected with Legionella disease by inhaling aerosol containing Legionella.

Allergic diseases
Allergens causing allergy include bacteria, fungi, dust mites, etc. These particles may come from the air conditioning system, such as the air conditioning system.

sick building syndrome
In 1982, who called it bad building syndrome (SBS), also known as sick building syndrome or office syndrome. The symptoms of "acute symptoms of SBS, the increase of the number of non-specific symptoms of the building, the increase of the number of non-specific symptoms of the throat (SBS) after leaving the building, and the symptoms of non-specific throat (SBS) after leaving the building were explained as" the symptoms of the non-specific symptoms of SBS, which can be improved after leaving the building ". In the 1970s, the epidemiological survey of office workers in foreign countries found that eye and upper respiratory tract irritation symptoms were common in modern office workers. In recent years, it has been found that 60% - 70% of employees have "bad building syndrome" in the investigation of office hygiene in big cities such as Beijing and Shanghai.

In order to protect the public health, central air conditioning health management has become one of the problems that people must face, and it is the main measure to prevent and control the spread of infectious diseases in public places. After years of investigation and consultation by experts, the Ministry of Health issued the "public places" on February 10 and 16, 2006 with the health supervision Fa [2006] No. 53 and the health supervision Fa [2006] No. 58 The hygienic management measures for central air conditioning and ventilation system, hygienic standard for central air conditioning and ventilation system in public places, hygienic evaluation standard for central air conditioning and ventilation system in public places, and cleaning specification for central air conditioning and ventilation system in public places provide basis for management and evaluation of central air conditioning and ventilation system in public places.

Scope of services
1. Central air conditioning residence 2. Hotel (hotel) guest room 3. Hotel (restaurant) 4. Barber shop, beauty shop 5. Cultural and entertainment places 6. Stadium (gymnasium), swimming pool (gymnasium) 7. Exhibition hall 8. Museum, art gallery, library 9. Shopping mall (shop) 10. Waiting hall (plane, ship, rail transit) 11. Outpatient area of hospital. 12. Business office building

Hygienic inspection index of air conditioning system
1. Cooling water and condensate of central air conditioning ventilation system (Legionella pneumophila)
2. Hygienic inspection on air supply of central air conditioning ventilation system (PM10, total bacteria, fungi, B-hemolytic Streptococcus and other pathogenic microorganisms)
3. Detection of inner surface of air duct of central air conditioning ventilation system (dust accumulation, pathogenic microorganisms, total bacteria and fungi)
4. Air purification and disinfection device (ozone, ultraviolet, TVOC, PM10)
5. Hygienic requirements for performance of air purification and disinfection devices (device resistance, particulate matter purification efficiency, microbial purification efficiency, continuous operation effect, disinfection effect)

Sanitary inspection items and standards of air conditioning system

Test name / item Test standard (method) name and number (including year number)
name project
Ventilation and air conditioning Tightness and air leakage Code for acceptance of construction quality of ventilation and air conditioning engineering (GB 50243-2002)
Combined air conditioning unit (GB / T 14294-2008)
Technical specification for ventilation ducts (JGJ 141-2004)
Code for acceptance of construction quality of building energy saving engineering (GB 50411-2007)
Total air volume Code for acceptance of construction quality of ventilation and air conditioning engineering (GB 50243-2002)
Combined air conditioning unit (GB / T 14294-2008)
Code for acceptance of construction quality of building energy saving engineering (GB 50411-2007)
Air volume of tuyere Code for acceptance of construction quality of ventilation and air conditioning engineering (GB 50243-2002)
Code for acceptance of construction quality of building energy saving engineering (GB 50411-2007)
wind pressure Combined air conditioning unit (GB / T 14294-2008)
Code for acceptance of construction quality of building energy saving engineering (GB 50411-2007)
Duct strength Code for acceptance of construction quality of ventilation and air conditioning engineering (GB 50243-2002)
Code for acceptance of construction quality of building energy saving engineering (GB 50411-2007)
power Combined air conditioning unit (GB / T 14294-2008)
Code for acceptance of construction quality of building energy saving engineering (GB 50411-2007)

Beijing Central Environmental Quality Monitoring Center
Free telephone: 4008861860
Laboratory Tel: 010-56546165 010-56546168
Fax: 010-56546167
Address: Building 2, zhongfuli palace brand base, Fengtai District, Beijing

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