First, take a look at three common situations:
- After starting the vehicle, a odor briefly appeared on the air outlet
- After the vehicle was turned off, the odor continued to appear on the air outlet
- When using warm air, the odor always existed on the air outlet
Many vehicles' air conditioning vents do not have odor or other odor when using warm air. What is the reason for this?
has explained the relationship between car heating air conditioners and A/C before this. You do not need to turn on A/C when using heating air. Interested readers refer to the following.
Someone commented on why there is no odor after A/C is turned on, which shows that the car has not started to heat up after A/C is turned on. Most vehicles will still cool in the current temperature environment; as long as the natural wind is cooled or blown at low temperatures, there will generally be no odor. The reason is very simple, because the low temperature will make the odor not so smelly.
Odor comes from bacterial metabolism, and protein will decompose into odorous molecules. The activity of
molecules will be affected by temperature. High temperatures will lead to greater internal energy, and increasing electron potential energy will increase the diffusion range; therefore, high temperatures will make the molecule more active in movement, so it will obviously smell bad when approaching trash cans or public toilets in summer. But in winter, it won’t feel too smelly even in the once dry toilet. The reason is that the low temperature reduces the activity of molecules.
This is why you don’t feel very odor when using cold air conditioners, and the low temperature reduces the activity of molecules; on the contrary, when using warm air, it is equivalent to directly "stimulating" the molecules, and it is natural to feel difficult.
just what exactly causes these molecules, can they be avoided?
These odors mainly come from rotten molds, and mold is inevitable.
Because the principle of cooling air conditioner is to absorb heat twice. The first heat absorption is that the low-temperature refrigerant absorbs the heat energy of the evaporator , and the second heat absorption is that the evaporator absorbs the heat energy in the air to achieve air cooling; the high-temperature air contains more water vapor, so when the blower blows the high-temperature air to the low-temperature evaporator, the condensate water will inevitably appear.
These condensed water will make the evaporator very humid during discharge through the drainage pipe of the evaporator box, and the air duct will be very humid. This is an ideal environment for senior mold; therefore, mold will appear as long as you use the cold air conditioner, which will appear every time you use it. Even after professional cleaning, it is impossible to avoid using the air conditioner again. This is why the air conditioning system has a odor, but warm air must not be used in winter. So what should I do?
There is no good way to do it, the correct way is to clean it regularly.
professional cleaning by disassembly and other methods is relatively expensive, and costs hundreds of yuan each time. High-frequency cleaning is not realistic.
So the correct operation is to clean it with high temperature, the warm air gust is next to the evaporator, and the warm air gust after the hot car is very hot, and the temperature is enough to kill mold and other bacteria.
drive the vehicle to the hot car, then adjust the temperature and air volume of the air conditioner to the maximum, and then open the door and windows; idle for half an hour can effectively sterilize and remove odor. If you want to disinfect the inside of the car, clean the seats and interior of the car and close the door and idle for half an hour.
The fuel consumption of a fuel vehicle for an hour is about half to two-thirds of the fuel consumption. Using a cold air conditioner will be equivalent to the displacement. If the external temperature is too low, using warm air is also equivalent; however, at best, it is only a dozen yuan in cost, which still saves a lot compared to professional cleaning. electric car or plug-in hybrid car costs much lower, after all, electricity costs are low.
When disinfecting the high temperature in the car, you should take out flammable and explosive products, mobile phones and other electronic equipment, water bottles and puffed foods and other items. After disinfecting the car, it is best to clean it, or open the window to ventilate and drive for a while.
Edit: Tianhe Auto-Auto Science Island
Dayshe MCN release, copyright protection rights reserved
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