Chery automobile Service Manual page 519

3. Ventilation system
centrifugal blower is also used to change and ventilate the air inside the vehicle. The
ventilation system consists of the air filter, air inlet, air duct, vent and etc. The system
introduces the fresh air from the outside of vehicle into the inside while the ventilation and
discharge port extracts the vitiated air from the inside to the outside. Chery A15LHD adopts
the natural ventilation and forced ventilation. The open/close fresh air inlet is controlled by
the fresh/circulating air vacuum valve.
During the natural ventilation, the fresh air enters into the vehicle from the air inlet fixed
under the front windscreen (positive pressure area), and gets into the trunk from the seat belt
notch on the trunk cover, then passes across the vents (negative pressure area) on the body
rear skirt, trunk lining, rear side beam and finally discharges to the atmosphere. Due to the
movement of air in the rear body compartment, it plays a good role to defrost the rear
windows. In addition, the whole process is conducted without pressure, so the air changing
doesn't create any noise and has nothing with the driving speed.
And during the forced ventilation, in case that the fresh air doesn't pass through the heating
radiator (the mixed gate closed) after the air is pressurized by the blower, the air will enter
into the vehicle via all air ducts, and then discharge along the same route as that of natural
ventilation to the atmosphere.
1. Restrictor damper
2. Heater core
3. Blower motor
4. Fresh air
Apart from the cool and heat the air inside the vehicle, the
An individual type casing system with blower
5. Fresh/recirculated air door
6. Recirculated air
7. Evaporator core
8. Air mix damper
U-4
9. To panel
10. A/C defrost damper
11. To defroster
12. To bottom outlet