These car filters are worthy of the reputation of "N95 masks" for mobile phones. See if you use it in your car.

Steam potential automatic-the first Liu

At present, the epidemic is starting after the holiday. Although most jobs are still in the state of "working from home", compared with "working from home" on legal holidays, work-related business trips may be inevitable. Compared with the bus and subway, it is obviously safer to choose a private car to travel in a "special period". First, the private car space is relatively "private" and is not shared with strangers; Secondly, the automobile air filtration system is often located in the engine room under the front windshield. As long as the cockpit is relatively closed, the ventilation provided by the air conditioning system often needs to pass through the air filtration system for more than one meter, which can also cut off the effective spread of COVID-19. Third, the anti-smog air purification function for PM2.5 earlier will also play a "miraculous effect" in the "war epidemic".

In the battle against COVID-19, N95 mask can be described as "the first battle to seal the gods" because it can effectively filter out 95% of particles with a diameter of 0.3 micron. Although the diameter of COVID-19 virus is lower, only 0.06-0. 14 micron, but the virus transmission needs carriers, usually attached to droplets with larger diameter, so N95 mask is an absolutely reliable epidemic prevention tool.

Old drivers may be quite proficient in car maintenance, and how to choose engine oil, machine filter and air filter has long been familiar with it, but air conditioning filter elements are often ignored. Now that the epidemic is coming, the air conditioning filter element equivalent to a car mask has attracted much attention. What are the anti-epidemic black technologies of small air-conditioning filter elements? Which air conditioning filter elements can reach the "N95 mask" level? How to choose many brands of air conditioning filter elements? The automatic priority of steam potential will appear together below.

Air conditioning filter element epidemic prevention black technology

The earlier automobile air purification and smog prevention functions have now become an epidemic prevention weapon. Tesla's Biochemical Model and Volvo's Cleanliness? Zone system, Geely's AQS, Roewe's PM2.5 full-effect air dust filtration system, BYD's green cleaning system, Lincoln's AAR cockpit "fresh air housekeeper" ... There are countless examples of car companies launching air purification functions. Air quality monitoring, intelligent switching of internal and external circulation, air purification in advance and other functions really ensure the air health in the car, but in the final analysis, the most effective epidemic prevention effect comes from the air conditioning filter itself.

When it comes to smog prevention and epidemic prevention, the filtering effect of air conditioning filter element on tiny particles is the core assessment factor, and the application of activated carbon material is the key to greatly improve the filtering effect of particles. At present, almost all brands of air-conditioning filter elements on the market have used activated carbon materials, among which Bosch is the representative brand of air-conditioning filter elements. Its raw materials are mainly sawdust and coconut shells, which are crushed, mixed, extruded and activated with dry charcoal. The filter screen of Bosch air conditioner adopts double-layer filtration. The light gray surface filtration can filter dust particles with a diameter of 0.3 microns at one time, and the dark gray surface contains activated carbon, which can filter smaller particles and odor again, and the filtering effect is equivalent to that of N95 mask.

Layered filtration technology is also the core technology of mainstream air-conditioning filter brands, among which Man brand is the most representative brand, and its filtration layer is as high as 7 layers. Filter paper materials include activated carbon, high-efficiency non-woven fabrics, multi-layer composite media, glass fiber materials and so on. It can inhale particulate matter, odor, pollen, ozone and nitrogen dioxide, and each layer has different filtration tasks.

3M, Mahler and Man brands have their own advantages in improving the effective filtration life of air filter elements. Compared with the traditional filter paper, the patented FILTRETE material used in the 3M brand filter has a more open and fluffy structure, which can deeply contain dust. The electrostatic fiber filtration technology can ensure the high efficiency of filtering particles with low filtration resistance. The service life of air conditioning filter elements of general brands is mostly 1 10,000 km, while the service life of 3M filter elements can reach1.5,000 km. The technical core idea of Mahler brand filter screen is basically the same, that is, to reduce the pressure of air conditioning filter element and improve its life, while taking the high efficiency of filtration as the breakthrough; Mann brand adopts melt-blown technology to improve the dust capacity of the filter element, make the structure of the filter element stronger and ensure the ventilation of the air conditioning system as much as possible. The improvement of the service life of air conditioning filter element can enhance the filtering effect in the middle and late period of use, which is its greatest advantage.

In addition, the air conditioning filter element used in Tesla's "biochemical mode" attracts attention in the field of HEPA (High Efficiency Air Filter) technology and lifting structure. According to GB/t 6 165- 1998 "Performance Test Method for High Efficiency Air Filters"? Permeability and resistance ",the filter with particle size ≥0. 1 micron with permeability ≤0. 1% (i.e. efficiency ≥99.9%) or counting permeability ≤0.00 1% (i.e. efficiency ≥99.999%) is a high efficiency air filter, and Tesla HEPA is a high efficiency air filter. In addition, thanks to the simple mechanical structure of pure electric vehicles, Tesla's air conditioning filter area can reach more than five times that of other vehicles. The biggest advantage of increasing the structural area is to ensure the effective life of the filter element, but correspondingly, its replacement cost will also increase greatly.

In addition to the application of activated carbon, multi-layer filtration, low pressure loss, HEPA and other air conditioning filtration black technologies, it also incorporates Volvo Clean? The negative ion generator in the Zone system can also become an "epidemic prevention artifact"-negative ions can destroy the molecular protein structure of viruses through the extra electrons they carry during the contact with bacteria, molds and viruses, resulting in structural changes (protein polarity inversion) or energy transfer, thus inactivating microorganisms such as bacteria and viruses.

Original vs brand? How to choose air conditioning filter element

February 4th is the solar term in beginning of spring. FAW-Volkswagen Audi launched the service of "Decisive Spring Warming and Cleaning the Core", reminding car owners to replace the original air conditioner filter of Audi, cleaning and maintaining the original air conditioner, which can improve the air health inside the car and provide users with door-to-door pick-up service at special time, which is full of warmth.

A warm poster also raises a question worthy of attention: how to choose the most suitable air-conditioning filter element in the case of many models and brands of air-conditioning filter elements? In order to solve this problem, Auto-First interviewed BMW authorized dealers, repair shops and an old driver who is good at maintaining cars.

Wang Jialin, Electrical and Mechanical Director of Beijing Baocheng BMW 4S Store: It is recommended to stick to the original air conditioning filter.

According to Wang Jialin, at present, the original air-conditioning filter elements of authorized dealers of major automobile brands can be basically divided into two categories, namely, ordinary filter paper type and activated carbon filter elements. Activated carbon filter element is more effective in filtering inhalable particles. At present, the original air-conditioning filters supplied by Baocheng BMW Store are all activated carbon filters. Wang Jialin gave three reasons for suggesting users to use original air-conditioning filter elements: First, the quality of original accessories replaced at authorized dealers is stable and reliable, and there is no hidden danger of shoddy or counterfeit; Secondly, the filtration effect and quality of air-conditioning filter elements are different, which will also affect the ventilation of vehicle air-conditioning system. Choosing original air-conditioning filter elements can ensure the consistency of vehicle air-conditioning system. Third, the air-conditioning maintenance provided by regular authorized dealers includes cleaning and sterilization of air-conditioning ducts and vehicle interior parts in addition to replacing filter elements. Compared with the private replacement of air conditioning filter, the air health in the car is more secure.

Lu Jingyu, head of Lu Xiao Auto Repair in Wu Fang Huge Automobile Park: Recommend 3M air conditioning filter.

In contrast, the reason given by Lu Jingyu is more "real": "Users who choose repair shops generally pay more attention to economy. Considering the brand premium factor, the original filter is often not cost-effective. " The reasons for recommending 3M brand air conditioning filter are: First, the customer reputation of the repair shop for many years; Second, the price of 3M brand air conditioning filter element is moderate, and the most important thing is its service life of1.5000 km. Lu Jingyu said, "Smart guests have calculated an account. Although the single use cost of 3M air conditioner filter is not the lowest, it is equivalent to a discount after running 5000 kilometers, and they don't remember it as clearly as the oil change machine filter maintenance.

Beijing taxi driver Master Lu: Recommend men's brands in special times.

Master Lu has been driving for 27 years and has rich experience in the normal maintenance of engine oil, mechanical filter, air filter and brake pads, and also has a lot of research on air conditioning filter elements. However, he doesn't care so much about the air-conditioning filter on weekdays, and even often ignores the replacement of the air-conditioning filter. Nowadays, with the current epidemic situation, air conditioning filter has become the highlight of automobile maintenance. "Under the cruel, spent 150 (yuan), and the owner of the repair shop is a friend for many years. He has always had a man brand there, which is the most expensive in the air-conditioning filter element and the best filtering effect, but never thought about changing it. Now that pneumonia is serious, this Hyundai (Elantra) has no high-end function of air purification and can only rely on this better filter element. My son also specially bought me a plug-in (car-mounted) purifier, so that I can work as hard as possible and open the window less. "

Choose the original factory or brand? Heavy service life or heavy filtration effect? In a special period, Auto-First reminds the majority of car owners to pay attention to the air health inside the car, choose the most suitable air conditioning filter and replace it in time.

Attachment: tips on maintenance and car use during the epidemic.

Baocheng BMW Wang Jialin:

During the 1. epidemic, it is suggested to shorten the replacement cycle of air-conditioning filter elements. In the past, the air-conditioning filter element was replaced and the air-conditioning system was maintained every two machine filters. It is recommended to replace every maintenance in special periods.

2. If the air conditioner filter element has not been replaced for more than 10000 km or 1 year, it is recommended to replace it in time.

3. When replacing the filter element, the air conditioning pipes and important parts in the car should be cleaned and disinfected.

Lu Xiao automobile maintenance Lu Jingyu:

1. If it is not convenient to go to the store to replace the air conditioner filter during the epidemic, it is recommended to choose online shopping and replace it yourself in time.

2. When selecting air conditioning filter, the quality of activated carbon filter can be judged by its weight and the thickness of filter.

3. The better the filtering effect, the smaller the ventilation volume and the higher the replacement frequency, otherwise the air conditioning effect will be affected.

Taxi driver Master Lu:

1. In special period, it is not recommended to take out the old air conditioner filter after blowing and continue to use it, and replace it with a new one in time.

2. Besides replacing air-conditioning filter and using car air purifier, regular alcohol disinfection of cars is the best means of epidemic prevention.

3. Even if the filter element of air conditioner with good filtering effect is replaced, try to open windows less, use the internal circulation function of air conditioner more, and insist on wearing N95 or medical mask when driving.

(Image from the Internet)

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.