How Often Should the Filter of a Car Air Purifier Be Replaced?

1 Answers
LeEvangeline
07/30/25 3:00am
Car air purifier filters should generally be replaced every six months or so. A car air purifier, also known as an in-vehicle air purifier or automotive air purifier, is specifically designed to eliminate odors, toxic and harmful gases, bacteria, viruses, and other pollutants from the air inside a car. The working principle of a car air purifier is as follows: A micro-fan (or blower) inside the device circulates the indoor air. Polluted air passes through the air filter inside the machine (undergoing two-stage filtration), where various pollutants are removed or adsorbed. The air is then continuously ionized by a negative ion generator installed at the air outlet (during operation, the high voltage in the negative ion generator produces a direct current negative high voltage), generating a large number of negative ions. These negative ions are blown out by the micro-fan, forming a negative ion airflow, thereby achieving the goal of cleaning and purifying the air.
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