Valeooscope - Air Conditioning System Thermal comfort loop

9. The Heating Ventilation and Air Conditioning unit (HVAC)

9.2 Capturing the outdoor air The outdoor air enters the cabin through an air inlet between the windscreen and the bonnet, in a part of the bodywork known as the water separator that acts as a seal between the air conditioning system and the bodywork. The air inlet is protected by a vent grill that prevents foreign bodies - leaves, insects, debris or even small animals - from entering the system. The air inlet is located in a zone that is insensitive to dynamic pressure. The cross section must be large enough to avoid excessive loss of head. The hot air that is warmed by the bonnet or comes from the engine compartment must not be drawn in, and the path of the air must not disrupt the air flow at the blower inlet.

9.1 Air circulation

Air is the main component of an HVAC circuit.

9.3 Extracting the air from the cabin

Outdoor air inlet

The air inside the cabin must be renewed. Once it has been captured and treated, the air must be expelled by extractors.

Air circulation in the cabin

Air re-circulation

Air circulation and extraction

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