Whether there is this epidemic or not, the disinfection and protection of vehicles is the first step to maintain our health. As far as vehicles are concerned, the pollution sources inside the vehicle mainly come from several aspects. The new car is easy to release harmful substances such as benzene and formaldehyde because of the interior materials and materials; Physical buttons such as the steering wheel of the vehicle are easy to attach bacteria and viruses after long-term contact; When the air conditioner is used for a long time, a lot of dust and germs will gather at the air outlet; If you open the window, car exhaust and PM2.5 will be harmful to your health.
With the impact of the epidemic, except supermarkets, most physical stores are closed. At this time, the owner must learn to disinfect his vehicle. Regarding the choice of disinfectants, 84, peracetic acid, Lysol and intravenous drip are all good choices. 84 Disinfectant should be diluted with 200 times of water before use, and peracetic acid stock solution should be diluted to 0.2%-0.5% before use. The proportion of Lysol water should be controlled at 65,438+0%-3% of the prepared solution, and the disinfectant should be added dropwise according to 65,438+0.
The prepared solution can be directly dipped or sprayed with a rag, and then the steering wheel, car doors and windows and places where hands often touch can be wiped with the rag to achieve the purpose of disinfection. After wiping the vehicle with disinfectant, you need to open the doors and windows and let the vehicle ventilate for about half an hour before you can continue to use it.
Frequent contact places can be wiped and disinfected with disinfectant. For harmful gases such as PM2.5 in the car, in addition to natural ventilation, the vehicle air conditioning system is also needed for filtration and circulation. At present, many vehicles already have PM2.5 filter devices in their cars.
The car air conditioner filters the air in the car through the filter element, and its working principle is similar to the mask we wear. Different automobile companies use different technologies to achieve this result, and some of them use multi-layer filter elements and add activated carbon. Others use catalysts to make formaldehyde and benzene react chemically; There are also methods of electrostatic adsorption of harmful substances such as particulate matter, the principle is different, but its main purpose is to deodorize, prevent pollution and filter PM2.5 and formaldehyde.
The main route of transmission in COVID-19 this time is droplet transmission. The diameter of droplet particles produced by our human body is below two microns, or even lower. According to scientific research, the diameter of COVID-19 is even smaller, about 0.08 micron. Even if the vehicle is equipped with an in-vehicle PM2.5 filtering device, the particulate matter that can be filtered is directly greater than or equal to 2.5 microns, and the filtering capacity of the air purification device installed in the vehicle is far from the standard for filtering COVID-19.
Can COVID-19 be isolated by replacing the filter element with higher filtration accuracy? In fact, it is unrealistic to increase the aperture of the filter element. For a common example, wearing a mask with a high level of protection can filter COVID-19, but I believe that many people sometimes have difficulty breathing because of wearing a mask, and so do the filter elements of automobile air conditioners. Too small a filter hole diameter isolates the virus, and it will also lead to a decrease in air intake, which will lead to poor breathing on the mask, an increase in the load of the fan in the car, a greater noise, and a blockage of the filter element.
According to the interpretation of a large number of experts, COVID-19 cannot survive in the outdoor air for a long time, and the probability of virus pollution in cars used outdoors for a long time is extremely low. Whether it is a house or a car, as long as it is ventilated frequently, the possibility of being polluted by viruses can be reduced. Therefore, disinfection, opening the air conditioning circulation system or opening the window for ventilation are effective ways to reduce the probability of infection in the car. Bamboo charcoal or air purifier can be placed in the car, which can better purify the air inside the car during non-ventilation time. In addition, driving is different from walking, and cars at high speed are difficult to be contaminated by viruses.
Academician Zhong Nanshan has made it clear in an interview whether to wear a mask when driving. Disinfection and ventilation have been achieved. If you drive alone, you don't have to wear a mask in the car and travel with your family. As long as everyone is healthy, there is no need to be overly nervous. If a taxi driver carries a stranger, you need to wear a mask to prevent the spread of the virus as much as possible.
The above methods can only reduce the possibility of being infected by virus, whether it is to disinfect the vehicle or to ventilate the vehicle frequently. If you are really worried, or car owners with superior economic conditions, wearing masks and changing them regularly can reduce the risk of infection to a greater extent. Of course, if you don't want to be infected, you'd better stay at home and wait for further instructions from experts.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.