Air purification method and system adopting fresh air

Abstract

The invention discloses an air purification method and system adopting fresh air and belongs to the indoor environment purification technology. The air purification system is characterized by comprising a casing, an air quantity regulation part and at least one primary filter screen layer, wherein an air inlet and an air outlet are formed in the casing, and the air inlet is used for introducing outdoor air; a first air treatment assembly and a second air treatment assembly are arranged in the casing, the first air treatment assembly comprises a power fan, the second air treatment assembly comprises a reusable dust collecting device, and the purification performance of the dust collecting device does not get poor after cleaning; the air quantity regulation part is used for controlling the rotating speed of the power fan, so that the speed range of air output from the air outlet ranges from 0.3 m / s to 5 m / s, and the primary purification efficiency of the dust collecting device for PM 2.5 is enabled to be as high as 80%-99.9%.

Description

technical field [0001] The invention relates to indoor environment purification technology, in particular to a fresh air purification method and system. Background technique [0002] At present, my country's air pollution is very serious, and outdoor air pollution is mainly characterized by soot and motor vehicle pollution. The concentration of total suspended particulate matter in the urban atmospheric environment generally exceeds the standard; sulfur dioxide pollution remains at a relatively high level; total vehicle exhaust pollutant emissions increase rapidly; nitrogen oxide pollution is on the rise; In the city's PM2.5 ranking, the annual average concentration of air PM2.5 in nearly 92% of the cities does not meet the national standard, and the annual average concentration of PM2.5 in 32 cities is more than twice the national standard, ranking in the top ten The average annual concentration of PM2.5 in cities in Beijing is almost three times higher than the national s...

AI Technical Summary

Problems solved by technology

[0004] Since the control of outdoor air pollution is a long-term and arduous task, it requires the efforts of the whole society and the government leads it. However, indoor air purification is a feasible method. The existing indoor air purification methods can be divided into indoor air purification methods. There are two ways, the air conditioner or the fresh air system, but there are some problems in use, which need to be improved

[0005] As far as the air purifier is concerned, its defects are as follows: (1) There is no indoor and outdoor ventilation function. The problem of excessive carbon dioxide and low oxygen content; (2) The effect of removing toxic and harmful gases in the room is very limited. The methods of carbon adsorption and photolysis are only effective for certain gases, and they are effective for dozens or even hundreds of types of gases that exist in the room. Toxic and harmful gases cannot be removed

Moreover, the effect of removing some gases will decline with the increase of use time, or even fail; (3) the working mode is only to repeatedly filter the indoor air, and the dust holding capacity of the filter is very limited. If the outdoor air is filtered, Its filter screen is quickly clogged and invalid; the filter screen needs to be replaced, and the cost of use is high; (4) the primary filtration rate of PM2. Repeated filtration can achieve a higher proportion of purification; and fresh air air purifiers are not in the circulation filtration mode, so they require a high primary filtration rate of PM2.5, and their primary filtration rate can reach as high as 80%-99%. (6) Existing air purifiers cannot change the problem of high carbon dioxide content and removal of various toxic and harmful gases in airtight rooms; (7) Existing air purifiers cannot withstand outdoor Low temperature, high dust, high humidity and other harsh air; (8) The existing air purifier body structure, air duct and air inlet and outlet structure, filter composition, electronic control method, material selection, installation and use methods, etc. cannot meet the requirements of fresh air. Requirements for introducing indoors and purifying

[0006] The central fresh air system can solve the problem of ventilating the room and purifying the incoming air to a certain extent, but it still has the following defects: (1) It is necessary to open multiple wall holes and arrange ventilation ducts in the room, and the installation of the system is complicated, The installation cost is high; (2) The indoor layout of ventilation ducts and fans requires a suspended ceiling, which takes up valuable indoor height space; (3) Since the ventilation ducts are arranged on the suspended ceiling, the system cannot be directly installed in the decorated room, otherwise it will affect the appearance; (4) The air duct of the system is covered by the ceiling and decoration materials, which makes it very inconvenient to clean and maintain the air duct system in the later stage, or even impossible to clean and maintain; (5) Due to the difficulty in cleaning the air duct, it is easy to cause secondary pollution to the indoor air, For example, when the temperature difference is large in winter in the north, the fresh air pipes are prone to condensation and dripping water, which will damage the home decoration, and bacteria are easy to breed in the damp pipes, and these bacteria flow into the room with the air.

[0008] Although the aforementioned two invention patent disclosures provide a fresh air machine that does not need to replace the filter screen, they do not disclose how to improve the one-time purification pass rate of the fresh air machine. For the fresh air machine, since the air cannot be circulated and filtered, it is harmful to PM2. The one-time filtration efficiency of 5, that is, the one-time purification pass rate is a key indicator to measure the purification effect

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