1. HVAC UNIT : LOCALISATION IN VEHICULE

2. HVAC : Heating, Ventilating & Air Conditioning Unit
Recirculation
air intake
Air intake grille
Demisting / defrosting flap
Air inlet flap
Vent flat
Blower
Feet heating flap
HVAC unit
Filter
Mixing flap
Heater core
Evaporator

3. OBJECTIVES
SAFETY
VISIBILITY
* WINDSCREEN
* LEFT & RIGHT SIDE
THERMAL
WINTER
* HEATING
COMFORT
SUMMER
* COOLING

4. Vehicle integration

5. AIR CIRCULATION

6. BLOWER SUBASSEMBLY

7. BLOWER

8. THERMAL SUBASSEMBLY

9. THERMAL SUBASSEMBLY: TEMPERATURE CONTROL WITH WATER FLOW CONTROL

10. THERMAL SUBASSEMBLY: COMPARISON OF DIFFERENT TYPES OF TEMPERATURE CONTROL

11. THERMAL SUBASSEMBLY: EVAPORATOR

12. THERMAL SUBASSEMBLY: ELIMINATION OF CONDENSATES
Position 9 to 15° in
the vehicle
Wall to trap dropletts

13. THERMAL SUBASSEMBLY: HEATER CORE

14. THERMAL SUBASSEMBLY: HEATER CORE

15. AIR DISTRIBUTION: FEET / HEATING MODE
The distribution control is on the “Feet” position;
the demisting nozzle is usually permanently
supplied (by design leak: 10% of the flow rate).
The position of the blower control and the
heating control are adjusted according to
requirements (the colder the external
temperature, the larger the flow rate).
The air intake control is on outside air.
The A/C control is switched on
(the compressor starts up as soon as
the temperature so permits).
A/C

16. CENTRED HVAC UNIT

17. CENTRED HVAC UNIT DISADVANTAGES ADVANTAGES
Same unit for left and right hand
Volume in x or z axis (--)
drive
Cost
Compacity in y axis (glove box)
(++)
Left and right separate
temperature control (++)

18. CENTRED HVAC UNIT WITH LATERAL BLOWER

19. CENTRED HVAC UNIT WITH LATERAL BLOWER

20. HALF CENTRED HVAC UNIT

21. HALF CENTRED HVAC UNIT

22. NON CENTRED HVAC UNIT

23. NON CENTRED HVAC UNIT

24. THE CAR CABINE FILTER
It is near the air inlet, in the engine compartment, or between the blower and the evaporator in the cockpit

25. PARTICLES FILTERS CHARACTERISATION
ENDURANCE On VEHICULE
Big town
Semi-urban
Motor-way
Pressure drop by fouling (Pascals)
Kilometers (Km)

26. FILTER FOR CAR CABINE
The filter should be controled systematically during maintenance operations
New filter
Old Filter

27. PARTICLES FILTER

28. AIR INLET SUBASSEMBLY: PARTICLE FILTERS

29. COMBINED GAS AND PARTICLES FILTERS