Recently, an article about 'Ali employees have died of leukemia, renting a formaldehyde room during their lifetime' has been screened in a circle of friends. The indoor air pollution represented by formaldehyde has caused social problems, which has made consumers nervous again. What is the most effective way to control indoor pollution? In addition to activated carbon adsorption, chemical decomposition, etc., the fresh air system products are gradually accepted by consumers, becoming a powerful 'weapon' against indoor air pollution sources such as formaldehyde.
When is the harm of formaldehyde?
In the incident of 'Ali employees living in formaldehyde room and suffering from leukemia death', the wife of Mr. Wang, who died of illness, said that Mr. Wang had rented a house managed by a platform in Hangzhou for two months and suffered acute acute myeloid leukemia. Before the death. Mr. Wang has been in good health. In January this year, all the indicators were normal when he was admitted to the medical examination. Afterwards, his wife commissioned a professional organization to test the house, which confirmed that the house formaldehyde exceeded the standard, and indoor formaldehyde pollution caused personal injury. Re-enter the public view.
In this case, whether the formaldehyde in the house exceeds the standard is the main cause of Mr. Wang's suffering from leukemia, formaldehyde has caused great harm to human health, and it has become an indisputable fact. Many scholars at home and abroad have done a lot of research on the relationship between formaldehyde and human health. It is pointed out that formaldehyde has a significant impact on the body's respiratory system, immune system, cell carcinogenesis, etc. Currently, the World Health Organization's International Agency for Research on Cancer (IARC) and the US Department of Health and Human Services and the Public Health Bureau have listed formaldehyde as the first category. Carcinogenic substances. In recent years, 'newly renovated houses have caused children to die of cancer' and other decoration pollution caused the disease, the news of death is endless.
In fact, indoor air quality is not optimistic in the building space of our daily lives and work. According to the official website of the World Health Organization, there are 3.8 million premature deaths in 2016 by the Family Air Pollution. In the same year, in 2016, Tsinghua University Building Environmental Testing Center released a research report “White Paper on China's Family Ecology Environment”, which sampled nearly 1,000 households in nine key cities including Beijing, Shanghai and Guangzhou. The results showed that indoor air pollution. The 'top three' of the 'culprit' are formaldehyde, PM2.5 and benzene. The formaldehyde is the most serious, Beijing, Guangzhou, Jinan, Xi'an, the formaldehyde rate is as high as nearly 80%, followed by PM2.5, benzene and other pollution sources. Excessive problem.
In addition to formaldehyde, air pollutants produced by home interior decoration include total volatile organic compounds (TVOC) such as benzene and toluene. Yang Jun, secretary general of the Indoor Environment Purification and Treatment Committee of China Indoor Decoration Association, told the Beijing News reporter that according to the information, each year 70% of newly renovated homes have problems such as excessive formaldehyde and other environmental pollution. He said: 'Consumers pursue decorative effects, from paints, ceilings to furniture, and almost every aspect must deal with non-environmental factors. Consumers even When purchasing building materials and furniture, every product is qualified for environmental protection testing, but when all products appear in one space, it is very common for the entire space to exceed the standard.
In addition to formaldehyde, which way is the most reliable?
Among the indoor air pollution sources, formaldehyde is the most talked about, and it is also because of its long pollution time. Song Guangsheng, director of the National Indoor Interior Environment and Environmental Protection Product Quality Supervision and Inspection Center, said that the most common sources of formaldehyde pollution are fiberboard, MDF, etc. Sheets, the binders used in the production of these materials are mostly urea-formaldehyde rubber with formaldehyde and urea as the main raw materials. During use, the materials that have not been edge-sealed will release free formaldehyde. Formaldehyde is an inert gas, release rate It has a lot to do with external factors such as temperature and humidity. Because of the 'hidden' in the depth of complex furniture structure, the release process is very long. As early as ten years ago, the research of Yokohama National University in Japan pointed out that the decoration materials such as wood-based panels The formaldehyde contained in the release time is as long as 3-15 years. Therefore, although most consumers have the common sense of 'renovating the house to have a taste, then the ventilation can not solve the problem of decoration pollution for several months.
Since there is pollution, it is necessary to go to the treatment. At present, there are various indoor pollution control methods on the market, which are generally activated carbon adsorption, chemical decomposition, and sealing glaze. Activated carbon adsorption uses activated carbon to absorb pollutants in the air; Decomposition and use of chemical agents to spray the gaps in the furniture, chemical decomposition of formaldehyde decomposition; sealing glaze is painted on the furniture surface, especially at the joints, sealing the volatilization point of formaldehyde may be blocked. In addition, there is also the use of air purifier , install fresh air system and other methods.
The solutions seem to be rich, but each has its own shortcomings. Although activated carbon adsorption is effective, it is often easy to saturate and needs to be replaced frequently, and once the activated carbon is saturated, the harmful gases that have already been adsorbed will be released again, for ordinary consumers. In other words, the amount of usage is difficult to master. Many consumers are accustomed to buying a large bag of charcoal bags before the new house, and put a few bags in each corner. Some insiders said that if the usage and replacement cycle are not scientifically calculated, these charcoal packages are only It has a psychological comforting effect. Chemical decomposition also has drawbacks. If it is not properly operated, it will easily cause secondary pollution of the air. The sealing effect is obvious, but it is obviously unrealistic to seal all the formaldehyde volatilization points in the home, such as curtains, sofas, etc. The source of free formaldehyde, these household items can not use the sealing process.
Song Guangsheng said that ventilation is an effective way to improve indoor air. More than 80% of people's life is spent indoors, if not ventilated in time, formaldehyde, mold, carbon dioxide, dust, dander and other air. The floating harmful substances will increase, the fresh oxygen will continue to decrease, and various diseases will come to the door every day. It is the easiest and economical health weapon to properly open the window every day. In the case of not being able to open the window, the fresh air system is currently The most effective way to purify indoor air.
Fresh air allows air to flow and solve indoor pollution
The concept of modern indoor fresh air first appeared in Europe in the last century. At that time, due to energy conservation considerations, the airtightness of buildings was greatly improved, resulting in insufficient indoor ventilation rate, resulting in frequent indoor air pollution incidents. Central fresh air system In general, the fresh air system is to ventilate the indoor air without opening the window. It is a continuous and able to control the ventilation path, and the indoor air is 'shipped' without opening the window. Go out and introduce outdoor fresh air. The heat exchange function of the fresh air can recover the energy at the maximum extent, so that the indoor temperature will not change much.
In terms of working principle, the fresh air system is different from the air purifier that consumers are more familiar with. The air purifier belongs to the inner circulation, which can only purify indoor air, and can not realize the cycle replacement of indoor and outdoor air; the fresh air system can filter the outdoor Fresh air is introduced into the room. When PM2.5 is filtered out, indoor formaldehyde, benzene and other gaseous pollutants can be discharged to the outside.
At present, in developed countries and regions, the fresh air system has entered the public family. Yan Wei, the chairman of the dreamer Xinfeng, said that the current American family's new wind penetration rate reached 66%, and the European penetration rate reached 80%. In 2017, the new German architecture Energy-saving laws stipulate that all new and renovated buildings, even if a window is replaced, must be installed with fresh air to ensure the indoor oxygen content, to achieve health and energy saving purposes. It can be said that the fresh air system is very high in developed countries such as Europe, America and Japan. The popularity rate is the 'killer' that changes indoor air quality.
In the past two years, with the change of consumer attitudes, the development of the market, the fresh air system has also begun to enter the Chinese family. At the same time as the market began to accept, relevant standards are also being introduced. On June 1, this year, the national standard GB/T 34012 -2017 "Air Purification Device for Ventilation System" has been officially implemented. According to industry insiders, as the first technical standard for residential fresh air, this standard clarifies the purification efficiency, resistance, safety performance, dust holding capacity of air purification equipment and The main performance requirements such as the increase in ozone concentration, further standardize the market for air purification equipment.
In addition to the normative technical indicators for fresh air products, in the installation of the fresh air system, the local government also presided over the introduction of relevant standards, and promoted the new wind system into ordinary residential. On July 1, this year, Beijing local standard "Technical Regulations for Residential Building Fresh Air System" Formal implementation. This standard provides a standard guidance method for the installation of fresh air systems in Beijing. It guides and regulates the design, construction, acceptance and operation of the fresh air system of residential buildings. It is also the first time that the local government promotes the fresh air system into ordinary residential buildings. Accelerate the process of the fresh air system into the ordinary residential building.
Yan Wei, chairman of Dreams Xinfeng, said that in the first quarter of 2017, 8% of the nation's hardcover commercial homes were equipped with a fresh air system, with a usage rate of 4%. In the same period of this year, 21.3% of the renovated homes were equipped with fresh air. System, the use ratio reached 17%. Fresh air system began to enter the public family.
When talking about how ordinary consumers buy fresh air systems, he said: 'In addition to focusing on brands, prices and other factors, it is best to carefully understand the strength of the manufacturers, product materials and service capabilities. Good fresh air products have good indoor air pollution control. The system should be excellent in terms of energy efficiency, heat recovery efficiency, noise, and operational stability. In addition, consumers should also consider the strength of the manufacturer. This is related to the future replacement of consumables, cleaning pipelines and other follow-up services, and is also an important part of consumer decision-making. '
Yan Wei finally mentioned that the current dreamer Xinfeng is launching the activity of “finding 100 homes that need to be guarded, and formaldehyde is exceeding the standard to create a dreamer”, and consumers who are worried about excessive formaldehyde in their homes can actively participate.