In recent years, the word "fresh air system" has become the focus of public attention due to the rampant haze. Although we heard the word "fresh air system" for the first time, it is not without birth.
To put it simply: fresh air systems are not created because of haze, and they are not needed because haze disappears.
Even if there is no haze in our life, a healthy life is inseparable from the fresh air system! That's why the world's first fresh air system was born in 1964.
In 1956, the British government promulgated the clean air act for the first time.
The original prototype of fresh air system design is a low noise and high static pressure forced draft fan. Since it came out in 1958, it was extremely popular in China at that time.
Early products only one-way exhaust, so also known as exhaust (fan).
At the end of 1970s, after the industrial revolution, Europe entered the fast lane of rapid development. High clouds spewed out thick black chimneys, which became the "original sin" of air pollution. Fan function has been unable to meet the needs of consumers.
At the end of 1970s, in the aspects of European economy, advanced technology and quality of life, a product of improving indoor air quality (IAQ) - Residential microcirculation air replacement system (VMC), also known as the central fresh air system, appeared. In the 1970s, VMC systems were installed in more than 90% of new homes in Spain.
ASHRAE invented indoor air quality ventilation code in 1989. In today's United States, indoor and outdoor air systems have become a necessity.
In 2000, it became law to install central fresh air systems in buildings throughout the European Union.
It took nearly 30 years for the industry to upgrade its industrial structure from the first generation ventilator to the second generation mechanical fresh air treatment system.
The third generation fresh air system: intelligent fresh air system
In 1984, when the United States applied the concept of informatization and integration of construction equipment to Hartford, Connecticut, the first "intelligent building" appeared, which started the global upsurge of building intelligent housing.
Development of fresh air system in China
After the birth of fresh air system technology, it can be said that the development of enterprises is not fast.
It's easy to understand. After all, the air pollution was not so serious at that time. In China, the development of fresh air system can be seen from the change of patent application.
Patent applications for fresh air system from 1985 to 2016
Before 1995, there were only 3 applications; from 1996 to 2005, there were 21 applications; from 2006 to 2015, there were 972 applications; and so far in 2016, 1683 applications have been made public (excluding those that have been applied but have not yet been made public).
The reason for the rapid growth of the number is not only the enhancement of the national awareness of intellectual property protection, but also the increasing emphasis on institutional innovation in recent years.
On January 1, 2002, China Indoor air pollution control standard was born.
In 2003, SARS, avian influenza, tuberculosis and other diseases made the global indoor air quality receive high attention.
Since 2010, with the severe haze weather, people pay more and more attention to the environmental problems and pursue a green and healthy home, which makes the "new wind system" more well-known and further into Chinese families.
The fresh air system does not simply filter PM2.5
With the deterioration of air pollution and environment, the development of fresh air has come into our eyes. But the design of fresh air system for a family education is not only through filtering PM2.5.
If so, what is the difference between air purifier and air purifier?
Ventilation: ventilation is the original intention of fresh air, but also the core function of fresh air. Traditional ventilation methods, such as window ventilation, are affected by seasons and weather, the outdoor air is not fresh, noise and dust, which will lead to the negative impact of window ventilation on the indoor environment, and the fresh air can provide indoor fresh air stably and continuously.
Reduce carbon dioxide: in family daily life, sleeping with doors and windows closed at night, carbon dioxide is easy to exceed the standard, which is not conducive to human health. The fresh air system can keep the indoor carbon dioxide in a healthy concentration range while ventilating.
Removal of indoor pollutants: according to the air detection of the newly decorated rooms by the relevant departments of the state, 75% of the rooms are found to exceed the standard of formaldehyde, and various "green" building materials are used to seal the rooms due to "superimposed pollution", and the harmful substances emitted by them far exceed the national emission standard.
75%, which is still the average percentage of the whole country, and the over standard rate of formaldehyde in some areas is even close to 90%.
Beijing decoration enterprise environmental management committee through the detection system data analysis shows that: 352 newly decorated houses in Beijing, 314 exceed the standard, accounting for 89%!
This means that there are 10 suites and 9 suites with formaldehyde exceeding the standard, and the elderly, children and pregnant women can't stand formaldehyde for a long time at home.