Fig. 12.1. Schematic diagram of air flow in the ventilation, heating and air conditioning system: 1 – windshield blower deflectors; 2 – air flow distribution flaps to the windshield deflectors and instrument panel deflectors; 3 – instrument panel deflectors; 4 – air ducts for heating the driver"s and passengers" footwells; 5 – air flow distribution flap to the instrument panel deflectors and heating air ducts for the driver and passenger footwells; 6 – heater radiator; 7 – cabin air filter; 8 – air recirculation system damper; 9 – air intake box; 10 – air intake in the car interior; 11 – fan impeller; 12 – fan electric motor; 13 – air conditioner evaporator; 14 - drainage hole for condensate drainage; 15 – temperature regulator flap; 16 – heating and air conditioning system unit housing.
Fig. 12.2. Schematic diagram of the refrigerant flow in the air conditioning system: 1 – combined pressure sensor; 2 – section of high pressure pipeline; 3 – receiver-dryer; 4 – high pressure line service valve; 5 – condenser (air conditioning radiator); 6 – condenser and radiator fan of the cooling system; 7 – air conditioning compressor; 8 – low pressure pipeline section; 9 – Low pressure line service valve; 10 – heater fan; 11 – evaporator; 12 – thermostatic valve.
The ventilation, heating and air conditioning system is a single complex that provides the most comfortable conditions in the car regardless of weather conditions and driving mode. The system includes a heater (increases the air temperature in any operating mode of the system), an air conditioner (reduces the temperature and humidity of the air), an air blower (fan) and air ducts with a filter (provide air exchange in the cabin, clean the air from dust), as well as a control unit (controls all elements of the system to obtain the specified comfort parameters).
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