Content source: People's Medical Publishing House published "Lung Words: Lung To Clear, More to Maintain"
Here don't do any recommended brand, what brand is not important, important is as a result, most of the purifier after reasonable purchase and put, can have a good effect, let us thoroughly clean indoor environment for the rest of our lungs to create a good environment, eliminate indoor "killer".
Compared to the haze outside, the indoor air is even worse!
Even if there is smoke outside the window, there are only a few moments when we can really get close to the person. And we spend most of our time indoors, either working or resting. For most homes, indoor air quality is even worse than outdoor air quality.
Related studies have reported that there are more than 30 kinds of carcinogens in polluted indoor air. More than half of these carcinogens come from the penetration of outdoor air or the flow of gases generated by opening Windows for ventilation. In addition, sources of particulates in indoor air often include coal heating, tobacco smoke, cooking oil fumes, plant pollen and indoor human activities.
Suppose when the haze comes, we hide in the room, closed doors and Windows, can really put the haze out of the door? Unfortunately, there is no difference at all between indoor and outdoor PM 2.5 concentrations. In the absence of any air purification device, indoor air is only likely to be worse than outdoor air most of the time, and usually not better.
Although staying indoors can isolate the outside haze pollution sources, closed when the particles, will slowly settlement, adsorption, absorption, the general direction is certainly getting smaller and smaller. But in reality, such an ideal situation does not really exist. The airtight effect of the Windows and doors of the vast majority of residential buildings is not so good. So the air from inside and outside can still be exchanged, albeit very slowly and in limited quantities, through small gaps.
If you do not open the window, the indoor PM 2.5 will gradually settle and adsorb on the surface of various objects, such as curtains, walls, desktops, clothes, especially those with large surface area, such as plush toys, sweaters, towels, etc., especially by the human body's natural "air purifier" - lung purification. In any case, when your child is playing with a stuffed animal, she's probably inhaling no less smog than when she goes running on a smoggy day.
How does an air purifier work?
Air purifier and lung function is very similar, are divided into three steps, the first step is to suck in the gas, the second step is in the body for adsorption and treatment, the third step is to release the treated gas. The first step and the third step are simple mechanical functions, very simple, and the difference between the air purifier is mainly in the second link.
The current air purifier in the most core of the second link generally includes the following: physical filtration, electrostatic adsorption and mixing.
The first is pure physical filtration, in fact, through a large air volume and high pressure fan, the air is passed through a layer or several layers of filters to filter out the particles or volatile organic compounds, or both.
The second principle is electrostatic adsorption, which makes sense, given that when we get to winter, we have a lot of dust and hair stuck to our clothes. The principle of the air purification device is when the air after a high voltage electric field, ionization, gas ionization out positive ions are absorbed to the cathode plate, while the negative ions will be the cathode, attached to the pollutant molecules to make it bring a negative charge, is to do a "this is a sign of bad guys", after the negatively charged pollutant molecules are adsorbed on the anode plate.
Electrostatic dust removal devices are already capable of handling molecular materials, and can remove particles as small as 0.01 micron in diameter. Commercially, it is used to remove soot from kitchens, so PM 2.5 is a no-braerunners. Electrostatic adsorption air purifiers do not need to replace the screen, because the board that absorbs pollutants will shake the dirty stuff into the screen. Just rinse the strainer regularly.
Of course, electrostatic dust removal device also has a disadvantage, because the high voltage electric field will produce ozone, so when using must pay attention to ventilation. To know, ozone can only have a bactericidal effect in low concentration, high concentration of harm to human body is no less than PM 2.5.