Now winter is almost foggy, and the air quality is getting worse and worse. Teenagers who didn't like wearing masks before have to wear masks to hide now-this is not the winter I expected.
Winter should be crystal clear, and there are ice ridges on the road, which will make a click when stepping on it. The air in winter should be clean, cold and pure. Breathing cold air into the lungs and exhaling white air is an exchange with the world and a close contact. However, at the moment, the smog makes all this just an illusion.
Walking on the road, we are afraid to breathe freely. At this time, we may envy those drivers who can breathe freely in the narrow space in the car. Teenagers should remind everyone here that the air inside the car is not better than the air outside the car. Many times, when the smog weather is the worst, the air inside the car is worse than the air outside the car.
Where does automobile air pollution come from?
PM2.5 in the air: When you open the door or window, the air will directly enter the car.
Various accessories and materials of the new car itself, such as plastic, leather case, etc. The internal structure of automobile is mainly composed of leather, fiber and various engineering plastics. These materials need to use harmful substances such as formaldehyde and benzene in production. Enterprises with perfect quality management system will carry out a round of "disinfection" before the interior parts leave the factory, but not all parts supporting enterprises will do enough "disinfection" because of cost problems.
Indoor decorations such as plush toys and plastic carpets are the main sources of secondary pollution. There are many kinds of interior decoration products sold in the market with different materials, but most of them do not indicate the manufacturer and effective quality and safety labels. You can imagine how low the safety index of these products is.
Carbon monoxide, gasoline volatiles and nitrogen oxides produced when automobile engines are running. If there is a defect in the sealing process of the carriage, harmful gases produced by automobile exhaust will invade the carriage and affect the human body.
Indoor air circulation system: When the air conditioning system lacks proper maintenance and cleaning, it will accumulate a lot of pollutants and affect the indoor air quality. Long-term use of the air conditioning system of old cars is easy to produce odor and breed bacteria. Car perfume, car wash cleaner, etc. , may bring pollution inside the car.
How to fight smog, the methods that individuals can choose are very limited, and there are even fewer ways to drive outside. As far as the current situation is concerned, the best way is the car purifier.
-Teenagers
How to choose high-quality car purifier?
When choosing a car purifier, you need to pay attention to the following points:
First, the purification principle
The purification principle of a high-quality car air purifier is particularly important. At present, the purification technologies advertised in the market can be described as various. Simply put, they are mainly mechanical and electrostatic (also known as negative ions).
Mechanical: the principle is similar to that of water filtration device. Through a fan with large air volume, the air passes through several layers of screens to filter out particles and volatile organic compounds.
Advantages: Good filtering effect and no secondary pollution.
Disadvantages: The filter screen needs to be replaced regularly.
Static electricity: The air is ionized into negative oxygen ions and hydroxyl groups by applying a strong electric field in space, and charged dust is adsorbed on the electrode plate or settled on the inner surface of the vehicle.
Advantages: No filter screen is needed (dust filter screen can be reused).
Disadvantages: low filtration efficiency, easy to produce ozone, ozone is very harmful to human body.
Second, the filter material.
Activated carbon filter screen: Activated carbon has a huge adsorption surface area, which can effectively remove volatile organic compounds. If you want to achieve better adsorption effect, you must choose activated carbon with alumina and sepiolite. The adsorption capacity of activated carbon mainly depends on iodine value, and the iodine value of high-quality activated carbon should be above 1000. Iodine value is the amount of organic matter that can be adsorbed by activated carbon per unit weight. Therefore, the iodine value multiplied by the weight is the main basis to measure the quality of an activated carbon.
HEPA filter: the filter grade is above H 12, and H 1 1 and below are all sub-efficient filters. HEPA filter can effectively remove bacteria, viruses, PM2.5, second-hand smoke and so on. Whether you have a cold or sneeze, the car purifier can reduce the impact of these pollution spread.
Third, the quality of the motor.
Motor is one of the core components of air purifier, and an excellent motor should meet the following requirements: 1. Low energy consumption; 2. Long service life; 3. High wind pressure; 4. Low noise. Relatively speaking, the quality of air purifiers using imported motors is higher. The air volume of traditional fans is very small, and the average air volume can be below 20m3/h.
Fourth, the air volume
Besides choosing appropriate technology and professional filter, the air output of car air purifier is also one of the important selection criteria. But for air purifiers, ensuring purification efficiency means that the filter holes should be small, which will limit the air output. The average car owner usually spends about 30-60 minutes in the car, so the purification speed is an important criterion for choosing a car purifier.
Fifth, the maintenance should be convenient.
A high-quality automobile air purifier, as the most important component of air purification-filter element, should always be kept in an effective working state. However, most car owners will forget to replace the filter element, which will not only lead to the air not being purified, but also the dust and mold accumulated on the filter screen may cause secondary pollution to the car. Even if I remember, I don't know when to replace it.
Sixth, additional functions
Finally, a high-quality car air purifier should pay attention to other issues. For example, materials should be environmentally friendly and do not produce secondary pollution; For example, there should be an intelligent control system that can automatically detect the air quality inside the car and intelligently choose to turn on and off the purifier.
As mentioned above, people do not pay enough attention to automobile air pollution, so there are not many car purifiers to choose from. The four models listed below are all outstanding in the field of car purifiers at present, with good sales and reputation.
Product features: three-stage filtration system: first-stage filtration, high-efficiency HEPA filter screen, high iodine value activated carbon; Patent ion cluster technology; The formaldehyde removal rate is 96%; 360-degree air intake +360-degree magnetic suspension fan.
Description:
Characteristics of 360-degree magnetic levitation fan: 1. The wind is stronger; 2. High efficiency and stable speed; 3. The noise is lower.
Product features: three-layer filtration: double-layer activated carbon fiber, activated carbon and low resistance filter paper; Optimize the air duct design; The number of clean air changes in the car is 4 times per hour (generally 2-3 times for ordinary products); Secondary wind speed setting; Filter update tips.
Description:
Low resistance filter paper: stable performance, uniform distribution, high efficiency, high strength and environmental protection.
Product features: double filtration: pre-filtration, activated carbon filtration; The whole body is covered with air inlets; There are two speeds to choose from.
Product features: three-stage filtration: HEPA filter (3M Filtrete filter), activated carbon particles and nano-silver mesh; Frequency conversion motor, intelligent compensation power supply, high wind speed; Vortex fan for absorbing floating dust; Optimize the air duct design, 360 degrees in and out of the air.
Description:
Nano-silver mesh is a kind of silver filter with nanometer particle size, which has strong inhibition and killing effect on bacteria.
The above data refer to the latest information on the e-commerce website.
Tips: What should I do if I encounter smog when I go out?
Homeowners and car owners can choose purifiers. You may whisper, aren't people who walk outside miserable? Relatively speaking, direct exposure to smog is indeed more vulnerable, so teenagers chose this tip, hoping that everyone can protect themselves and live healthier.
1. Wear a mask. Although there is no universal mask that can completely block harmful particles, it is recommended to wear a duckbill mask. However, it should be noted that after wearing the mask for a long time, the mask is also easy to be polluted. After use, it must be cleaned and disinfected in time to ensure hygiene.
2. Don't be bald and naked in foggy days, because your hair is absorbent, and you should wear a hat when you go out.
3. Except the hair, nose and mouth, the less exposed the rest parts, the better. Scarves and dresses are all necessary clothes for going out.
4. Stay outdoors less, the pace should not be too fast, and the shorter the time in the smog, the better. Stop outdoor sports.
Breathe through your nose, not your mouth, and don't open your mouth and laugh.
6. Don't wear contact lenses in foggy days. Haze can pollute lenses and hurt eyes.
7. Wash your face and hands as soon as possible after entering the house, and wash your nose with clear water.
8. Drink plenty of water and eat crude fiber food to help your body detoxify.
9. The stratum corneum can resist external stimuli, so ladies who love beauty should not do exfoliation and skin care in foggy weather.
10. Open the window for ventilation to avoid the time when the smog is serious. It is best to have a window at noon when the sun is shining.