Vehicle-mounted air circulation system

The invention discloses a vehicle-mounted air circulation system. The system comprises a motor, a centrifugal fan, an electric heating assembly, an evaporator, a condenser, an air filtering and sterilizing net, a cold air door, a hot air door, a hot air motor, a cold air motor and a hot air duct, a cold air duct, an air outlet, an air exhaust and a negative ion generator; outdoor air is filtered and sterilized, and the treated air is cooled or heated under the action of a CES system and then conveyed to a lift car or discharged out of the lift car. Environment friendliness is achieved, specifically, dust, heavy metal particles, haze and the like in ambient air are filtered, and bacteria in the surrounding environment are killed; the temperature, the humidity, the oxygen concentration, thefresh air and the like can be adjusted at will and can act on the human body through breathing, nerves and blood systems, fatigue is relieved, the resistance ability is enhanced, and a driver can drive in the optimal state. 本