How should central air conditioning be used correctly in office buildings to avoid risks? How does the property unit manage the central air conditioning safely? What should be noted when using home central air conditioning? These questions will be answered by the central air conditioning maintenance network. Article reprinted from the Internet.

The prevention and control of COVID-19 is the most important work at present, and the correct operation of air conditioning and ventilation systems during infectious disease epidemics can effectively reduce the probability of cross-infection. Due to the diverse types of buildings and the wide variety of central air conditioners, in the environment with the possibility of alternating infection, three common suggestions can be put forward: First, the use of air conditioning as much as possible, and increase the amount of fresh air, and open Windows regularly when conditions permit, which is conducive to preventing the spread of the epidemic. Second, for buildings that do not have fresh air conditions, in order to prevent cross infection, it is necessary to add medium and sub-high efficiency filters, which can effectively remove fine particles in the air. Third, if the first two suggestions can not be achieved, it is recommended to avoid the use of central air conditioning and use local heating.

At the moment of the epidemic, in order to avoid cross infection, the central air conditioner sharing the return air in multiple rooms needs to be closed while increasing the fresh air volume; For central air conditioning systems that cannot increase the volume of fresh air and must use return air, filters above F7 should be used in air conditioning units or return air outlets as far as possible; Considering that most parts of the country are still in the heating period, increasing the volume of fresh air should also maintain the indoor temperature to maintain the basic comfort requirements of the human body.

For buildings with no fresh air system or insufficient fresh air volume, it is recommended to open Windows regularly for ventilation, and open the exhaust system when conditions permit. Rooms with neither fresh air system nor exhaust air and unable to open Windows for ventilation have a greater risk of cross-infection and should be avoided during special periods.

It should also be emphasized that Suzhou central air conditioning maintenance recommendations do not include hospitals and buildings with confirmed cases, because the situation in hospitals is more complex, it is necessary to do a good job of personal protection, and other buildings should close the central air conditioning system in time once confirmed cases are found, and carry out disinfection and isolation work.

Before using a central air conditioner, you should understand the type of air conditioner, air supply range, fresh air outlet, cooling pool and health indicators. Which department should be responsible for these operations? How to do specific implementation work on the safe use of office buildings?

In government office buildings, office buildings, hotels, shopping malls and other public buildings, the operation of air conditioning and ventilation systems accelerates the flow of air between various areas and floors, and there is a greater risk of cross-infection in areas with high density of personnel, long use time and relatively closed indoor areas. Safe, scientific and reasonable operation of the air conditioning and ventilation system to prevent the spread of the new coronavirus caused by the air circulation caused by the air conditioning and ventilation system, and to protect the health of personnel in the building to a large extent, is one of the important responsibilities of the operation manager of facilities and equipment.

The China Property Association requires that all property service enterprises must pay more attention to the novel coronavirus outbreak, strengthen the physical prevention of building entrances and exits, underground parking lots and relatively densely populated areas, and assign special personnel to take charge of air conditioning systems, elevator systems and other equipment.

Hvac clean room design and installation experts suggest that in buildings without epidemics, when the air conditioning system is put into use, the air conditioning unit should operate according to the full fresh air condition, in principle, to ensure that the per capita fresh air volume is not less than 30 cubic meters/hour, and increase the cleaning and disinfection frequency of key equipment such as the internal filter of the air conditioning unit, surface cooler and fan coil return air filter. It is recommended that the transportation system should be cleaned and disinfected according to the actual flow of people, and office buildings and other areas should be cleaned and disinfected regularly or daily according to the situation.

During the epidemic period, the air conditioning and ventilation system of public buildings should be put into operation for preheating 1 to 2 hours before use, and the fresh air and exhaust system should continue to run for 1 hour after use to carry out comprehensive ventilation of the building to ensure fresh indoor air. When conditions permit, consider adding an appropriate amount of simple air shower room at each personnel entrance or elevator entrance, and also set up temporary disinfection facilities such as ultraviolet disinfection lamps to disinfect the area during non-use time.

Under the epidemic situation, in order to ensure safe and orderly work, the safety of the water supply and drainage system of the office building and the temporary storage of garbage collection are also critical. Water supply and drainage system includes tap water, hot water and sewage, from the perspective of health and epidemic prevention, tap water is required to carry out water quality testing according to regulations, hot water is required to disinfect low-temperature pipes, and sewage system is required to do a good job of water sealing and sealing. The property should confirm whether the water seal is available and effective one by one, and all those that cannot be determined should be blocked, and the office building should also strengthen the disinfection and daily disinfection of key parts. In terms of garbage collection and temporary storage, the property is required to operate in strict accordance with the rules and regulations, there is a special person responsible for it, and the work of collecting used masks separately should be done.