The car solar air purifier is one of the air purifiers for car. It is converted into electric energy by the photoelectric principle of solar energy and then composed of an ion generator, a fan, an air filter, etc. Its working principle is as follows: The micro-fan (also known as the ventilator) circulates the air inside the vehicle. The polluted air passes through the PM2.5 filter and the activated carbon filter in the machine to filter or adsorb various pollutants, and then passes through the negative ion generator installed at the air outlet. (The high voltage in the negative ion generator generates DC negative high voltage when working), the air is continuously ionized, a large amount of negative ions are generated, and is sent by the micro fan to form a negative ion airflow to achieve the purpose of cleaning and purifying the air.