What should I do in foggy weather? How to prevent smog indoors?

Indoor air pollution can be avoided by the following methods:

1. "Where there is decoration, there is air pollution". One of the main sources of indoor air pollution is decoration pollution. Therefore, controlling from the source is the highlight of prevention and control. The main control countermeasures are:

(1) Carry out green supervision from the aspects of architectural design and environmental design, carry out green environmental design, and control the use of composite boards, sandwich panels and coatings. Binders containing formaldehyde and benzene.

2 buy environmentally friendly home appliances.

③ Use clean energy. Use electric energy and gas fuel as much as possible in the kitchen to reduce the generation of sulfur dioxide, nitrogen oxides and dust, and use a range hood in the cooking process to make the generated pollutants quickly discharged outdoors.

2. It is the most effective way to deal with indoor air pollution, but it also depends on the outdoor air condition. For example, the outdoor air quality in China is not suitable for opening windows for a long time.

3. Regularly clean and dust, do not accumulate dust, and keep the room clean. [ 1 1]

4. Keep the indoor environment at a certain humidity and temperature. If the humidity and temperature are too high, most pollutants will soon be emitted from the decoration materials, which is unfavorable when there are people indoors. At the same time, too high humidity is conducive to the reproduction of bacteria and other microorganisms. But when there is no one at home, such as traveling, some measures can be taken to improve the humidity.

5. Use pesticides, incense and deodorant in moderation. These substances have a certain treatment effect on indoor pests and odors, but they are also harmful to human body. Especially in wet use, the generated spray particles can absorb a lot of harmful substances into the body, and its harm is much more serious than that in dry use.

6. Try to reduce the chances of smoking indoors, and smoke less or not.

7. Green plants: Green plants have also become one of the choices of citizens on cloudy days, but the photosynthesis of plants on cloudy days is limited, so the effect of green plants on improving air quality is not obvious. You can plant a variety of green crown-leaf plants such as green radish and evergreen in your balcony, terrace and indoor, because they have large leaves and strong adsorption capacity. However, when placing green plants at home, we should not only consider the function of plants, but also consider the current situation of room area, light and ventilation.

Most plants absorb carbon dioxide and expel oxygen under the photosynthesis of sunlight during the day, but the opposite is true at night. However, succulents such as cactus, which are native to tropical arid areas, never compete with the owner of the room for oxygen. The stomata on their fleshy stems are closed during the day and opened at night, which increases the concentration of negative ions in indoor air while absorbing carbon dioxide.

Plants such as Hupi Lan, Huwei Lan, Tequila, Palm, Kale, Sedum, Rooting and Pineapple are also less dependent on sunlight, which can purify the air at night and achieve the purpose of sterilization. The number one plant listed by NASA to purify the air is geranium, which is called "the most effective air humidifier". These plants have a certain auxiliary effect on cleaning indoor air on cloudy days. [4]

purifying equipment

The most effective way to remove indoor pollution is to install an air purifier. There are many different technologies and media in the air purifier, which can provide users with clean and safe air.

Air purifier: refers to household appliances that can remove solid pollutants (such as dust, pollen, bacterial particles, etc.). ) and gaseous pollutants (decoration pollution such as odor and formaldehyde, etc. ) In the indoor air. Mainly divided into desktop, floor-standing and wall-hanging, composite and so on. In recent years, with people's concern about air quality and gas pollution after decoration, air purifiers are gradually selling well in the market. [ 12]

Air purifier

At present, the removal technologies of particulate matter in the air mainly include mechanical filtration, electrostatic precipitation, negative ion plasma method and electrostatic electret filtration.

Generally, mechanical filtration mainly captures particles in the following four ways: direct interception, inertial collision, Brownian diffusion mechanism and screening effect. Good collection effect for fine particles, but large wind resistance. In order to obtain high purification efficiency, the filter element needs to be compact and replaced regularly.

Electrostatic dust removal is a kind of dust removal method which uses high voltage electrostatic field to ionize gas and make dust particles charged and adsorbed on electrodes. Although the wind resistance is small, the collection effect of larger particles and fibers is poor, which will cause discharge, troublesome and time-consuming cleaning, easy to produce ozone and form secondary pollution.

The working principle of negative ion and plasma method to remove indoor particulate pollutants is similar, which is to make the particulate matter in the air agglomerate to form larger particles and settle, but the particulate matter is not actually removed, but only attached to the nearby surface, which is easy to cause dust again.

Electrostatic electret filtration, represented by "high-efficiency electrostatic air filter" in the market, adopts breakthrough filtering materials with permanent static electricity, which can effectively block particulate pollutants in the air larger than 0. 1 micron, such as dust, dander, pollen, bacteria and so on. At the same time, the ultra-low impedance ensures the stable operation and refrigeration effect of the air conditioner. In addition, the deep dustproof design ensures a longer service life. At present, it is widely used in household and car air conditioners (such as the best-selling models of famous brands such as SAIC, Volkswagen and GM) and some commercial construction fields (such as the Bird's Nest, Beijing Hotel and the third phase of the Capital Airport).

Traditional standard filter media can effectively remove particles above 10 micron. When the particle size is reduced to 5 microns, 2 microns or even submicron, the efficient mechanical filtration system will become more expensive and the wind resistance will increase significantly. Through the electrostatic electret air filter material, high collection efficiency can be achieved with low energy consumption, and at the same time, it has the advantages of electrostatic dust removal and small wind resistance, but there is no need to externally connect tens of thousands of volts, so ozone will not be generated, and it is very convenient to discard because it is made of polypropylene.

It should be noted that most brands of purifiers exaggerate their functions when promoting sales, and some purifiers claim that they can "effectively capture" dozens of kinds of particulate matter. Faced with a wide variety of market brands and complex functions, consumers have a feeling of seeing flowers in the fog. To this end, experts remind consumers that they can choose products with guaranteed brands when they can't distinguish the functions of products, or choose according to the sales volume of products.

It should also be noted that air purifiers placed indoors cannot guarantee complete air purification. This aspect is different from the use of water purifiers. People can easily ensure that they only drink the water treated by the purifier to ensure the basic safety of drinking water. The air purifier placed indoors cannot "organize air to filter through it", and the purifier can only filter or treat the air flowing through it. The indoor air quality after using the air purifier will be affected by many factors, such as the handling air volume of the air purifier, the size of the room, the indoor air flow state (whether the doors and windows are opened and sealed), the location of the air purifier in the room, the purifier and so on.

Experts believe that buying an air purifier is not once and for all. Air purifiers, like water purifiers, need regular maintenance, and filter screens and filter elements need to be replaced regularly to maintain their purification effect. Otherwise, the filter screen of the purifier itself will become a pollution source, causing secondary pollution to the air. However, with the increase of cloudy weather, the frequency of maintenance or replacement should be accelerated.