The isolated room should be ventilated at least several times a day.

It is best to open the window for ventilation three times a day. "Some people think that the more times you open the window, the better. In fact, this is not the case, because often opening the window will lower the room temperature, and the elderly and children are prone to illness. "

When the room is small and it is windy or cold outside, the window opening time should be shorter; When the room is large, there is no wind outside or the weather is warm, the window opening time should be longer. Taking an 80-square-meter room as an example, opening the window for about 20 minutes in the absence of wind or breeze can reduce pathogenic microorganisms by 60%.

If there is a road outside and there are many pollutants, it is necessary to change the window opening time. "A little earlier in the morning and a little later in the evening, I want to open the window for air when there are few cars. In windy and dusty weather, if there is a screen window, it is best to open the window a little smaller. And use a humidifier, humidifying spray, or put a pot of water on the heating to increase the humidity of the air and let the dust and microorganisms sink. "

Old people and children had better put on some clothes before opening the window to avoid getting sick because of the sudden drop in temperature after opening the window. If you have a seriously ill patient, you need to open the window carefully and try to purify the air with ultraviolet disinfection lamps.

It is best to open the window for ventilation for 7 times:

1, after getting up early when sleeping, the indoor space is often relatively closed. I have been out of breath all night, and the air in the bedroom is often a little bad. Not only has a lot of carbon dioxide accumulated, but oxygen has also become very thin. When arranging bedding, tiny pollutants such as dust mites and dander will float in the air.

At this time, it is particularly important to open the window for ventilation. However, the time to open the window should not be too early, especially in cities, where the concentration of pollutants in the air is still high at six or seven in the morning. It is best to wait until the dirty air deposited on the ground is lifted off before opening the window for air exchange. You can open the window around 8 am, when the temperature rises and the air quality gets slightly better. It should be reminded that patients with cardiovascular diseases are easily affected by cold air and other stimuli. So be sure to wear more clothes after getting up and open the window after getting used to the temperature.

2, quilt cover. Mite likes warm and humid environment, and quilt is its favorite home. The quilt will be stained with human sweat and some will be slightly wet. The temperature and humidity at this time are most suitable for mites to survive. In the south, it is common that the air humidity is high and the quilt is wet. Ventilation by opening the window is a good way to ensure that the quilt is dry.

Don't rush to fold the quilt after getting up. It is best to flatten the quilt in turn, and then open the window to let the quilt breathe, which can promote the evaporation of water vapor in the quilt and avoid the breeding of mites and molds.

3. When cooking. Chinese cooking methods, such as frying and frying, will produce a lot of oil smoke, and the ingredients will emit a lot of harmful substances at high temperature, which has a strong stimulating effect on nasal, eye and throat mucosa, and can cause respiratory diseases such as rhinitis, pharyngolaryngitis and tracheitis, and harmful gases such as carbon monoxide may be released when gas and natural gas are burned.

Therefore, when cooking, you should not only open the range hood, but also open the window for ventilation. It is best to let the air produce convection. After cooking, keep the window open and ventilate for at least 10 minutes to avoid oil fume deposition at home. The range hood should be turned on early and turned off late, that is, before cooking and after cooking for 5 minutes.

4. After taking a shower. After bathing, the water vapor in the bathroom is condensed and the humidity is very high. It must be ventilated and dried in time, otherwise it will easily produce a lot of mold and threaten health. If there is a window in the bathroom, open the window in time after taking a shower and open the bathroom door to ensure air convection; If there are no windows, you must install an exhaust fan with high power and good performance.

5. after the transformation. Formaldehyde is the number one killer of indoor pollution. Decorated wardrobes, cabinets and other parts that use more plates will release pollutants such as formaldehyde indoors for decades. If the cupboard at home smells, you can open the wardrobe, cupboard, bookcase, drawer, etc. When you go out during the day, at the same time, open a small crack in the window to let the pollutants be fully released. If you feel that the indoor pollution is serious, you can open the kitchen and bathroom door at the same time and turn on the ventilation function of the ventilator, range hood or air conditioner to accelerate the diffusion of pollutants.