12 questions and answers about smog and air purifier
Today we have summarized 12 issues that everyone cares about and are related to smog, to answer them one by one.
Do you want to open the window in the fog?
A: Of course not.
Some people say that the fog is coming, the air quality in indoors and outdoors is similar, and it is not as good as ventilation through windows.
This statement is wrong. In the case of normal closing of doors and windows in foggy days, the indoor PM2.5 concentration is nearly half lower than that of the outdoor. Friends with top rated air purifiers for large rooms can see it from the test data. Opening the window will allow the outdoor high concentration of harmful particulate matter to enter the home without any obstacles, seriously affecting the indoor air quality and threatening our health.
Secondly, most people use heating/air conditioning equipment or humidification/dehumidification equipment at home. Ventilation of the window will cause heat/cooling loss and humidity imbalance in the room, which is not energy-saving and environmentally friendly.
Therefore, our solution to the people in the smog area is “a fresh air system with filtering function + a reasonable number of large room air purifier for smoke”.
What is a fresh air system?
A: The fresh air system is a kind of home appliance that can continuously deliver fresh air to your home and discharge indoor dirty air. It can continuously change indoor air, let the indoor air flow and keep fresh.
The fresh air system mainly has three types: central ceiling pipe type, wall type and cabinet type.
The central ceiling pipe type can be hidden in the ceiling, the fresh air effect is better, but the price is relatively high, and the installation design requirements are also relatively high. Wall-mounted and cabinet-type are non-pipeline fresh air systems, which are divided into one-way flow and two-way flow.
The working mode of the new fan in one-way flow can be understood as only entering the air. The air is continuously drawn in and then the dirty air in the room is squeezed through the window slit and the door seam, and there is no independent exhaust outlet.
The two-way flow of the new fan can be understood as having the presence and exit, while the air is continuously pumping in, and there is also a separate exhaust vent to discharge the dirty air.
What is the difference between an air purifier and a fresh air system? How should I choose?
Answer: The air purifier is responsible for purifying the indoor air. It is the inner circulation. The fresh air system is used to filter the outdoor air and then pump it into the room to realize air circulation and increase the indoor oxygen content.
At present, the fresh air system in China is based on the current state of air quality, the filtration level has been improved, ventilation and ventilation can also maintain a good filtration effect.
If the local air quality is relatively poor, it is recommended to buy both the fresh air system and the air purifier. The fresh air system can be turned on 24 hours a day. When the indoor and outdoor air quality is relatively poor, both of them are turned on at the same time.
Why are there so many differences in the appearance of the air purifier? Which one is more suitable for the family?
A: These differences are caused by the structure of the air purifier. For households, a purifier with a double inlet structure is more recommended.
At present, the air purifiers on the market can be roughly divided into four types: half-tower, tower, box, and double-inlet. The reason why the double-intake is more recommended is because its structural advantages are obvious.
Its air duct is very short and direct. The sides of the machine are large-area filters and enter the wind at the same time. The air is not blocked too much and is quickly blown out from the top of the machine with lower noise. In particular, it maintains a high air purification efficiency (CADR value) even when the minimum wind is applied, which is more suitable for the family to open 24 hours, and the lower noise will not interfere with family rest.
Moreover, its price is moderate, the price of the family version is generally around 5,000 yuan, compared to the tower price of about 10,000 yuan or so.
Is the higher the CCM value of the air purifier, the better?
A: Not the higher the better.
The CCM value represents the service life of the air purifier filter. The home environment is relatively small and does not require too high a CCM value.
It is best to end the smog season every year, the filter screen is almost dead, and replaced directly. Otherwise, when the season of the purifier is not very good, the filter screen will be delayed and not replaced, and the harmful substances inside will be easily mildewed and deteriorated, causing secondary pollution.
When purchasing an air purifier, you can directly purchase a family model. Do not blindly pursue high-end business choices. The best is the best.
Can buying an air purifier solve all indoor air pollution problems?
The main function of the air purifier is to purify indoor particulates through a HEPA filter. Some high-end purifiers also have activated carbon and other purification media, which may have a certain purifying effect on formaldehyde and some volatile organic compounds with odor.
But in fact, formaldehyde is only a kind of indoor harmful gas. You may also breathe a series of toxic or even carcinogenic gases at home, such as TVOC (total volatile organic compounds), strontium, ammonia and so on.
According to the World Health Organization’s 2016 data, indoor air pollution kills 4.3 million people worldwide each year, 600,000 more than outdoor pollution. Indoor harmful gases have exceeded the pollution of outdoor particulate matter and become an important factor threatening our health.
For these harmful gases, air purifiers alone cannot solve them.
The best way to solve indoor air pollution is to avoid using too complicated building materials, try to buy large brands of home improvement products, and ventilate the air. If there is no window opening condition, you can install a fresh air system, which can not open the window. Under the 24-hour ventilation.
What kind of mask can prevent smog?
A: It needs to meet certain standards. There are three main types of identification for these standards.
N95. The well-known N95 is not a specific product name. It is a mask classification of the US standard, that is, in the US NIOSH (National Institute for Occupational Safety and Health) standard, “filtering non-oily particles is more than 95% efficient” and passed A type of mask reviewed by NIOSH.
NIOSH has conducted a series of research and specifications on respiratory protection products since the 1980s and is now continuously updated. For PM2.5 granules, or to protect against some of the disease spread through the air, this can be achieved with a N95 mask.
▲ US NIOSH standard
KN90. On some packages you can see the words GB2626-2006 KN90, which is the Chinese standard established in 2006.
According to the GB2626-2006 standard, our country uses sodium chloride aerosol to represent non-oily particulate matter and paraffin oil to represent oily particulate matter to test the protective ability of a professional mask product. The particle size used in these test standards is less than 2.5 microns and is therefore considered to be protective against PM2.5.
▲ China GB2626-2006 standard
FFP1. This is the European standard and is certified by the Comité Européen de Normalisation (CEN) respiratory protection equipment. The standard is to divide the particulate protective filter into two types: solid particle protection and liquid particle protection, which are tested and classified by NaCL (sodium chloride) and DOP (paraffin oil) aerosols respectively.
▲ European EN standard
How to choose a mask?
A: The phrase “There is no best, only the most suitable” is the mask. In addition to the above mentioned points, in order to meet certain standards, we believe that fit and comfort are also important considerations.
“Efficient fit” is a prerequisite for all dust masks to work. The air is like a stream of water, where it flows first where resistance is small. A mask that does not form an effective confined space on your face is uncomfortable and has no effect.
If a mask leaks, it is really not as good as a dog, no, it is better not to wear it.
The other one is comfort. A mask is good to wear, Le Bleu does not press the nose, whether the breath is smooth, there is no taste, etc., we must consider the choice of masks.
Before we bought 15 anti-mite masks for a detailed evaluation of comfort, interested can drop down to the final recommended reading, the first one is oh.
What are the small details to pay attention to when wearing/protecting masks?
A: In the process of purchasing and using, you need to pay attention to these points:
It is best to buy a single individually packaged mask (see the next question for reasons).
A head-mounted or neck-worn mask will have a higher fit than an ear-worn fit.
A mask with a skeleton will not cause a mask to contract with the breath during vigorous and rapid breathing, and the comfort of breathing will increase.
The mask that has just opened the bag will be somewhat tasteful. You can open the package in advance, or take out the mask and open it.
Disposable protective masks are not washable. Do not modify the mask yourself.
Mask replacement time varies from person to person, the surrounding environment, the time spent on the road, the way of wearing, and the frequency of use will have an impact. There are no strict life regulations for everyday applications (usually 3-4 days). However, when the protective mask is damaged, dirty or the breathing resistance is too large, the mask should be replaced in time.
If the glasses don’t fog, make the sealed nose clips fit the nose as much as possible.
Long-haired girls can wear a high ponytail or a large ball when wearing a head-mounted mask, so that the upper rope can be fixed at a higher position, which can improve the fit and comfort.
Some special people, such as children and the elderly, should wear masks carefully.
How to use the used anti-mite mask?
A: It is recommended to put it in its original packaging bag.
After the mask is unpacked, we always habitually throw away the bag. In fact, this bag is a tool for storing the used anti-smashing mask.
Many of the better-designed tamper masks are now individually packaged, and a better mask package uses a zippered self-sealing port. Do not throw the bag after unpacking. The anti-smash mask is not required to be put back, and the plastic seal can be sealed to effectively avoid contact with external pollutants.
However, it should be noted that the anti-mite mask has just been taken off, it is best to cool it a little and dry it, and then put it in, to avoid the residual temperature in the bag to generate steam, breeding bacteria.
Is the breathing valve on the tamper mask really useful?
A: It is really useful.
Most breathing valves are one-way valves. When inhaling, the breathing valve is closed and gas is passed through the mask fabric into the interior. When exhaling, the gas can be quickly discharged to avoid the feeling of tightness.
If there is no breathing valve, the hot and humid air tends to accumulate inside the mask, causing discomfort, which can cause dizziness due to lack of oxygen. Therefore, the price of a mask with a breathing valve will be relatively expensive.
Is the electric tamper mask a gimmick or is it really practical?
A: The gimmick does not work, and it does.
Everyone knows from the above questions. As long as the mask meets the standard and the fit is good, it can better prevent sputum, and this electric smash-proof mask has taken a new step in comfort. This kind of mask can actively deliver air, not boring, and is more suitable for running and riding.
Electric tamper masks are also known as fresh air masks and are currently available in two types.
One is piped. It is pumped into the outside air through a small new fan attached to the arm. After being cleaned by a new fan, it is piped to the mask for breathing.
The downside is that it’s a bit ugly. The big pipe is connected to the mask and the new fan. It is especially like someone who runs out of the hospital intensive care unit.
The other is non-pipelined. The new fan is integrated into the mask, and the value of the fan is greatly improved. The disadvantage is that the volume is large and has a certain weight. The new fan is closer to the ear and has some noise.
Nothing else, as long as you don’t care about other people’s eyes, even if you wear it.
Finally, remind everyone again that if the local area is also affected by smog or dust, it is best to bring the mask. We also welcome everyone to share the air conditions in their respective locations in the message area, so that we envy envy.
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