How to judge whether the air conditioning evaporator needs to be cleaned?

The working principle of air conditioning is very simple, the fan blows to you, and a heating element is put in the middle, and the hot air is produced; Change the cooling element, cold air; If this intermediate element is dirty and smelly, it will come out as smelly wind.

The heating element (auxiliary water tank) and refrigeration element (evaporation box) of the car air conditioning are installed in the deepest part of the center console, and you can not see whether it is dirty or not. This alone makes home air conditioners much easier to maintain!

Smell, something to do with mushrooms?

All the articles I've seen stop at "because it's dirty, it stinks", but what exactly is it that stinks?

Many people may not know, the biological world has four gates: animals, plants, bacteria, fungi! Fungi have set up shop because the family is so big!

Fungi means "mushrooms" in English. Mushrooms do belong to fungi, in life, we also commonly use "fast growing mushrooms" to describe a thing is very dirty, which is very reasonable. Some people will also think of beriberi, gray nails, mycotic XX inflammation... It's all right. It's all fungus! Some are delicious to eat, some are smelly, and some are toxic, and they are disgusting.

Where did the fungus in the air conditioner come from? You have to start with growing conditions. The moisture in the air will condense on the cold Coke bottle, which is called "condensation".

When the air conditioning refrigeration element (evaporation box) works, it is colder than the beverage bottle, and it will also attract the moisture in the air to condense. When the evaporation box is wet, dust, microorganisms and the "seeds" of microorganisms in the air will stick to the evaporation box. If the evaporation box stays damp for a long time, it will attract more settlers.

Experts suggest that "first turn off the air conditioning, natural wind for 3 to 5 minutes and then turn off the fire", that is, to let the natural wind dry the evaporation box and air duct, to avoid wet all night to seduce microorganisms and create new offspring. But ~ yes ~, many people do not care about this operation, directly turn off the fire and leave.

Gradually, the "little mushroom" appeared...

Mold is also a kind of fungus, you must have seen moldy fruit. Mold likes moist conditions and is very fertile.

Spores are "small strong" mold, mature spores are very eager to wind, always waiting to go to a new place to settle.

You see, when you turn on the air conditioner, these smelly little particles go on a trip, get stuck in your nasal mucosa, and you smell the stink. (Sometimes just open the air conditioning, the wind has not cooled down, you will inexplicably sneeze, do you remember?)

Some people have measured the car air conditioning that has not been cleaned for 3 years, and there are 1000 to 2000 molds per square centimeter on the evaporation box, and the spores are countless, and the time is blown out, and the next time it can grow out.

There are many kinds of mold, most of which are harmless to humans, but a few are dangerous. The main toxicity of mold is caused by nervous and endocrine disorders, immune suppression, carcinogenesis, liver and kidney damage, reproductive disorders, etc. (This is very important). You can also check the "Legionella bacteria" in the air conditioner, which was the same year, it spread wantonly in the barracks, wiped out one of Napoleon's regiments, hence the name.