Elimination of unpleasant odors is performed by destroying their constituent formula at the molecular level and by destroying the bacteria, the product of which is the smell itself.
There are no miracles here - it's chemistry and physics. Many odors are hydrocarbons (CH) with different numbers (phenol CH, formaldehyde CH2O, ammonia CH, etc.). And the matrix produces hydroxides (OH) and as a result of the reaction we get eco-friendly H2O and CO2.
Odor itself and most importantly its source is eliminated. This is the main difference from fresheners and deodorants, which only mask the smell and you get a double dose of chemistry.

Yes, because the device precipitates the most dangerous fine dust, it is very light and flies in the air. This includes all allergens including flower pollen, dust and pet hair particles. Allergens are removed from the breathing zone and do not enter the lungs.

No, because the bulk of all dust in an enclosed room is already on the floor and no more than 1% of the total amount flies in the air, but it is the most dangerous. When the device works, due to ionization, all dust and allergens are charged, attracted to each other, become heavier and are deposited on the floor and taken out of the breathing zone. And you do not filter it with your lungs.

No, it can't, because the ions "live" in the air from a few seconds to a few minutes. Therefore it is necessary to constantly replenish their quantity. There are no natural mechanisms of ionization in closed rooms, and in order to eliminate "aeroion hunger" (with the minimum norm of 600 units/cm3 according to SanPiN 2.2.4.1294-03, the devices work 24 hours a day, maintaining a natural ionic balance.

Microdoses of ozone produced by the device decompose unpleasant odors to neutral residues, destroy viruses and bacteria without exceeding the safe concentration for humans. Human can smell ozone at concentration 100 times less than maximum permissible concentration (MPC). In medicine there is a whole field of Ozone therapy.

Indeed, in high concentrations, like any other substance, ozone can be harmful. But in small doses it has a beneficial effect on the air environment and, as a consequence, on human health. The way it happens in nature in the open air. The devices produce ozone by the safest method of "cold plasma" with the ability to continuously adjust from zero to comfortable levels.
Separately, there is a "sanation" mode with maximum production of ozone, it has a timer for 2; 4; 6; 8 hours, (without the presence of people and animals), in 2-3 hours after switching to normal mode ozone O3 turns into oxygen O2 and is completely safe.

An air conditioner only cools or warms the air by pushing room air through it. Many people mistakenly think that the unit installed outside takes fresh air from the street. This function is available in expensive models from 120 thousand. A typical air conditioner has a filter on which coarse and medium dust is deposited. Together with humidity it is ideal environment for pathogenic microflora and when you turn on air conditioner together with cooled air a great number of molds, fungus, other pathogens and allergens are flying. And all diseases are caused by that, not by cold air. The same thing happens in your car. You have to wash or change the filter every week, which of course nobody does. That's why you need an air purifier.