"Changyin" is one of the simplest and fast -blocking ways to block virus transmission. Disease control experts: It is recommended to be less than twice a day, no less than 30 minutes each time

During the new crown epidemic, the crowd of crowd and poor ventilation will increase the risk of new crown pneumonia. This is because the new crown pneumonia is infected with the virus from the virus through speaking, cough, sneezing, etc. The droplets generated can spread more than 1 meter in the air. This is also the origin of the "1 meter line". The air -soluble gum that is generated can be suspended for a long time in the air, which has the characteristics of long communication distance and strong diffusion ability. Take an elevator, the same transportation, dining together, chess and card rooms, and the recent epidemic dissemination caused by the recently closed space.

Nowadays, although there are many virus methods to kill the air on the market, such as ultraviolet disinfection, use chemical disinfection agent air disinfection, and air disinfection machines, etc., but the relevant methods are difficult to achieve in places where people are active, and the cost is too high. Essence It is not realistic to wear masks for a long time in some specific occasions, such as home and restaurants. So how to improve the public space environment with low cost and efficiency and reduce the risk of virus transmission? Wang Xin, a popular science expert of the Municipal Centers for Disease Control and Prevention, said that the scientific prevention of virus invasion should learn "scientific ventilation." This simple and operable minor measure can introduce the outdoor cleaning air into the indoor, quickly dilute the air -soluble, and drain the indoor air to the outdoor, which can greatly reduce the risk of virus transmission indoors. The weather is sultry, reminding everyone not to stay in a closed space where the air is not circulating, and open windows to ventilate at home regularly. Some units and public places must also actively formulate regular ventilation plans.

In common ventilation measures, natural ventilation is the simplest and easier to do. Open the windows, doors to allow the air to circulate indoor and inside the car. Even if the weather conditions are not good, if you encounter high temperature and cold weather, you can turn on the window or ventilation in a short time, which can make indoor and outdoor air circulation, which can also play a certain role. The opening of the window ventilation plan can open the windows for 30 minutes at 10:00-10: 30 every day, and the standard operation of ventilation for 30 minutes of ventilation for 30 minutes every day at 15:00-15: 30 per day. In some public buildings, due to the long ventilation path, large flow resistance is not enough to achieve natural ventilation, or the ventilation situation is poor, or the ventilation situation is poor. Auxiliary ventilation, such as installing row fans and electric fans in the bathroom or restaurant. In some large shops, hotels, schools, shopping centers, restaurants, office buildings, etc., due to architectural design, natural ventilation may be poorly effective. It is recommended to use a centralized ventilation system and air filtration system to improve indoor air, reduce virus transmission, The risk of exposure to the crowd.

Effective ventilation, keep in mind the following key time points:

1. "After the morning" must be ventilated: rest overnight, the environment is closed, the carbon dioxide content contained in the air is high, the oxygen is relatively thin, and harmful substances such as dandruff and dust mites will also float in the air. At this time Ventilation is very necessary.

2. During cooking, ventilation is necessary: ​​During the process of cooking, oil fume will be generated in most cases, and oil fume contains more harmful substances. In order to reduce the concentration of oil fume, it is recommended that you open the window simultaneously while turning on the range hood to allow the indoor air to be fully flowing.

3. Before going to bed: Appropriate windows to ventilate the windows one hour before going to bed to ensure the interior air flow, increase the oxygen in the air, beautify the indoor environment, and promote sleep.

4. In the process of cleaning and cleaning: During the cleaning process, there are more indoor dust. At this stage, indoor pollutants have the most, including bacteria and dust mites. Open the window to reduce the concentration of harmful substances indoor, and avoid inhaling small harmful substances.

Wang Jiangli, a reporter from Xi'an Newspaper, Wang Jiangli

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