Formaldehyde exists in three states: free state, adsorption state, and binding state. Only formaldehyde can be eliminated by ventilation in the free state. 3--15 年，也就是说装修后经过通风是不能完全去除室内甲醛 的，只能起到暂时降低甲醛浓度的效果 Research by Yokohama National University in Japan shows that the indoor formaldehyde release period is generally 3--15 years, which means that after decoration, ventilation can not completely remove indoor formaldehyde , and can only reduce the concentration of formaldehyde temporarily.
通发现， 80% 的客户认可通风能有效的降低甲醛浓度，同时绝大多数人认为每天开窗几个小时就足够了。 According to relevant research reports , 80% of customers recognize that ventilation can effectively reduce formaldehyde concentration, and most people think that opening windows for several hours a day is sufficient. Is this really the case? The relevant experiments are as follows:
0.2mg/m3 ，并且维持温度在 25 度。 Firstly, the formaldehyde release source was sealed in the experimental chamber. After stabilization, the formaldehyde concentration in the experimental chamber was maintained at 0.2 mg / m3 , and the temperature was maintained at 25 degrees. “ 南北通风 ” 。 Then open the two ends of the experimental cabin and place them in an outdoor environment to achieve " south-north ventilation " . After obtaining the data for a period of time, the experimental chamber was sealed again to observe the change in formaldehyde concentration. 10 分钟左右，甲醛浓度即可降到国家标准 0.1mg/m3 以下，如果家庭里装修复杂，通风不畅，时间会更长。 After several tests, a general conclusion was reached: in some cases, the ventilation time was about 10 minutes, and the concentration of formaldehyde could fall below the national standard of 0.1 mg / m3 . 分钟左右又会达到原始甲醛浓度。 After the doors and windows are closed, the original formaldehyde concentration will be reached again in about 30 minutes.
Based on laboratory data, the following conclusions are drawn. If the formaldehyde is removed by ventilation alone, several conditions must be met:
进风量 。 First, the amount of air intake . We can think of the indoor environment as pollution sources are constantly emitting smoke. At this time, we open the doors and windows. If the air intake is small or there is no wind entering the room, can the smoke trapped in the room be taken away? I'm afraid the answer is no. Therefore, if you want the wind to take away the smoke, the amount of incoming air must be greater than the volatilization rate of the harmful substances. 19 度以后，甲醛释放量会随温度成指数倍增加，这也是为什么夏天室内容易超标的主要原因。 Because the boiling point of formaldehyde is relatively low, after the temperature is increased to 19 degrees, the amount of formaldehyde release will increase exponentially with temperature, which is the main reason why indoor standards are easily exceeded in summer.
室外空气质量 。 Second, outdoor air quality . PM2.5 ，它的危害比甲醛危害报道的还要早，还要多。 It is well known that the main pollution of outdoor air is PM2.5 , and its harm is reported earlier and more than the harm of formaldehyde. When we opened the window for ventilation, it was possible that formaldehyde was taken away, but new pollutants were brought. It is equivalent to sending away the wolf, and attracting tigers and panthers, and for our health, these are all things that need our attention.
持续通风 。 Third, continuous ventilation . 24 小时不间断的，开窗通风虽然把游离的甲醛带走了，但是家具、木板、纺织物等污染源的甲醛还在源源不断释放。 According to the above experiment, it is known that the formaldehyde release is uninterrupted 24 hours a day . Although the window opening ventilation takes away the free formaldehyde, the formaldehyde from pollution sources such as furniture, wooden boards and textiles is continuously released. When you feel that the air is getting better, or you have to close the window to rest at night, the formaldehyde will gather in a short time, and the indoor air quality will be polluted again. Therefore, if you want to keep the indoor environment up to standard, you must open the window continuously or close the doors and windows for no more than half an hour at a time, but it is generally difficult to do so.
冷热交换 。 Fourth, cold and heat exchange . Spring and autumn are generally fine. In summer or winter, every family likes to close doors and windows and turn on air-conditioning or heating. If ventilation is needed at this time, it will have a great effect on the indoor temperature. However, in general, more people choose not to open the window, which is why we think that the impact of formaldehyde on the human body in winter is greater.
To sum up, the selection of ventilation and purification of indoor air must meet the above four conditions at the same time, but very few can be achieved. 是一项综合治理过程，通风是一种***的辅助性净化空气方法，只是通过单一方式难以实现真正的空气净化。 We suggest that indoor air purification is a comprehensive treatment process, and ventilation is a complementary method of purifying air, but it is difficult to achieve true air purification through a single method. ，为了自己和家人健康着想，切不可盲目采用没有根据的方法。 Therefore, after a professional company provides a targeted solution, do an indoor formaldehyde detection and treatment . For the health of yourself and your family, you must not blindly use unfounded methods.