In view of the actual situation such as the coming of summer and the hot weather, the State Council should clarify the newly released issues such as when to wear masks, when not to wear masks and how to use air conditioners in summer.
In these cases, you don't need to wear a mask.
The Guidelines for Wearing Masks for Public Science (Revised Edition) are applicable to low-risk areas, and the original guidelines are still followed for medium-high-risk areas.
/At home and outdoors/
You don't need to wear a mask at home. In outdoor, parks and other places, it is recommended to use disposable medical masks or surgical masks with you, and keep a social safety distance of more than 1 m without masks. In supermarkets, shopping malls, restaurants, exhibition halls/museums, gymnasiums/gymnasiums and other places, you need to carry disposable medical masks or surgical masks with you. You don't need to wear a mask when there are no people gathering, good ventilation and a social safety distance of 1 m or more. Wear disposable medical masks or surgical masks in theaters, cinemas, underground or relatively closed shopping places, Internet cafes, and poorly ventilated public places such as elevators.
/When riding/
Wearing a mask varies with different means of transportation. You don't need to wear a mask when riding a bike or driving by yourself; Wear disposable medical masks or surgical masks when taking public transportation such as buses, subways, long-distance buses, trains, ships and airplanes.
/specific location/
People in specific places, such as offices and workshops, do not need to wear masks under the condition of ensuring effective ventilation and keeping a safe distance above 1 meter. Service personnel in shops, public transport, restaurants, canteens, hotels, the entrances and exits of unit communities, the front desk of enterprises and other places shall wear disposable medical masks or surgical masks.
/At school/
Primary and secondary school personnel on campus should carry disposable medical masks or surgical masks with them. On campus, students and teachers don't need to wear masks; School waiters, cleaning staff and canteen staff wear disposable medical masks or surgical masks.
College staff, faculty and students do not need to wear masks under the condition of ensuring effective ventilation and keeping a safe distance of 1 meter; Wear a mask when closed, crowded or in close contact with others (less than or equal to 1 m); School waiters, cleaning staff and canteen staff wear disposable medical masks or surgical masks.
/hospital/
Hospital visits, visits or accompanying personnel wear disposable medical masks or medical surgical masks. People in nursing homes, welfare homes, prisons and mental health institutions do not need to wear masks; Foreigners and service providers wear disposable medical masks or surgical masks.
Pay attention to hygiene, and do a good job of hand hygiene before wearing and after taking it off. Masks that need to be reused should be hung in a clean, dry and ventilated place after use. Spare masks are recommended to be stored in the original packaging bag. If they are not individually packaged, they can be stored in disposable food bags and ensure that they are not deformed. If you feel chest tightness and shortness of breath when wearing a mask, you should immediately go to an outdoor open place and take off your mask. Abandoned masks are classified as other garbage for disposal. Medical and health institutions staff, crowded places or other suspected contaminated abandoned masks need to be stored separately and treated as hazardous waste.
How to use air conditioning safely in summer
The Guidelines for Operation, Management and Use of Air Conditioning in Summer (Revised Edition) stipulates the requirements for operation, management and use of centralized air conditioning and ventilation systems (including all-air air conditioning systems, fan-coil systems with fresh air, fan-coil systems without fresh air and multi-unit systems) and split air conditioners in summer, which increases the detailed technical requirements in the use process compared with the original version.
If it is an all-air air conditioning system, it is necessary to master the fresh air source and air supply range before starting, and strengthen personnel training; Check whether the filters, surface coolers, heaters (humidifiers) and other equipment are operating normally. Clean and disinfect the open cooling tower and air handling device, and clean the air duct if possible. The preferred professional organization for cleaning and disinfection of air conditioning system. When conditions permit, the sanitary quality of air supply should be tested; Keep the fresh air outlet and its surrounding environment clean, and the fresh air will not be polluted; Keep a certain distance between the fresh air inlet and the exhaust outlet to avoid short circuit.
In operation, the return air in the middle and high risk area should be closed. If an efficient and above filtering device is used in the return air (pipeline) or air conditioning box, or an effective disinfection device is installed, the return air can be turned down. It is suggested that the indoor temperature should be adjusted at least 26 degrees Celsius. If it can meet the demand of indoor temperature regulation, it is suggested that the doors and windows should not be completely closed when the air conditioner is running. When using air conditioning system in crowded places, to strengthen indoor air flow, priority can be given to opening windows, opening doors or turning on fans, or air conditioning must be turned on for about 20-30 minutes every 2-3 hours. For shopping malls, office buildings, underground garages and other places with large personnel flow, ventilation should be strengthened; And after the end of business every day, the fresh air and exhaust system of the air conditioning system should continue to operate for a period of time. Strengthen the sanitary management of condensed water of air conditioning units, fan coil units and cooling water of cooling towers. Regularly clean, disinfect or replace filters, tuyeres, air handling devices, surface coolers, heaters (humidifiers), condensation trays and other equipment and components that operate air conditioning systems. U-shaped pipes such as sewer pipe, water seal of air handling device, toilet floor drain and condensate drain pipe of air conditioning unit should be inspected regularly, and water should be replenished in time when there is water shortage.
If it is a fan-coil unit plus fresh air system, in addition to mastering the fresh air source and air supply range, it is also necessary to check whether the filters, surface coolers, heaters (humidifiers), fan-coil units and other equipment are operating normally. Clean and disinfect open cooling towers, air handling devices, condensation trays, etc. , and clean the air duct if possible. Cleaning and disinfection of air conditioning system should be carried out by professional institutions first. Ensure that fresh air is directly taken from the outside, and it is strictly forbidden to take air from the computer room, corridor and ceiling. Ensure that the fresh air outlet and its surrounding environment are clean and the fresh air is not polluted. For rooms with large depth, measures should be taken to ensure ventilation in the internal area; If the fresh air volume is insufficient (less than 30m3/h). National standards), the personnel density should be reduced.
During use, it is suggested that the indoor temperature should be adjusted to not less than 26 degrees Celsius. If indoor thermal comfort can be satisfied, it is recommended to open the door or window when the air conditioner is running. Strengthen the ventilation of shopping malls, office buildings, underground garages and other places with large personnel flow; Moreover, the air conditioning system will continue to operate for a period of time after the end of business every day. Increase the ventilation frequency in crowded places. When using the air conditioning system, you can turn on ventilation devices such as window opening, door opening or ventilator, or ventilate for about 20-30 minutes every 2-3 hours. Strengthen the sanitary management of easily polluted areas such as condensed water and cooling water in air conditioning system. The cooling tower, air handling unit, air supply outlet, condensate pan and other equipment and components operating the air conditioning system shall be cleaned, disinfected or replaced regularly. Strengthen the inspection of U-shaped pipes such as sewer pipes, water seals of air handling devices and floor drains in toilets, and replenish water in time to prevent air mixing on different floors.
The operation of split air conditioner is relatively simple. Wipe the dust on the air conditioner shell with a damp cloth that does not drip before opening. Open the cover plate according to the air conditioning instructions, remove the filter screen, rinse the dust off the filter screen with tap water, dry it or wipe it with a dry cloth. Install the filter, start the air conditioning refrigeration mode, and check whether the air conditioner can work normally. Before using split air conditioner every day, open the doors and windows for ventilation for 20-30 minutes, and then turn on the air conditioner. It is recommended to adjust the maximum air volume and run for more than 5- 10 minutes before closing the doors and windows. After the split air conditioner is turned off, open the doors and windows for ventilation. In a crowded area (such as a conference room) where split air conditioners are used for a long time, let the air conditioners ventilate for about 20-30 minutes every 2-3 hours. It is suggested that the indoor temperature should be adjusted at least 26 degrees Celsius. If it can meet the demand of indoor temperature regulation, it is suggested that the doors and windows should not be completely closed when the air conditioner is running.