HVAC UNIT : LOCALISATION IN VEHICULE

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

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

Vehicle integration

AIR CIRCULATION

BLOWER SUBASSEMBLY

BLOWER

THERMAL SUBASSEMBLY

THERMAL SUBASSEMBLY: TEMPERATURE CONTROL WITH WATER FLOW CONTROL

THERMAL SUBASSEMBLY: COMPARISON OF DIFFERENT TYPES OF TEMPERATURE CONTROL

THERMAL SUBASSEMBLY: EVAPORATOR

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

THERMAL SUBASSEMBLY: HEATER CORE

THERMAL SUBASSEMBLY: HEATER CORE

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

CENTRED HVAC UNIT

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 (++)

CENTRED HVAC UNIT WITH LATERAL BLOWER

CENTRED HVAC UNIT WITH LATERAL BLOWER

HALF CENTRED HVAC UNIT

HALF CENTRED HVAC UNIT

NON CENTRED HVAC UNIT

NON CENTRED HVAC UNIT

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

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

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

PARTICLES FILTER

AIR INLET SUBASSEMBLY: PARTICLE FILTERS

COMBINED GAS AND PARTICLES FILTERS