Airflow control system

An airflow control system comprising:

• an air blower disposed on a front side in a vehicle traveling direction with respect to an inside of a cabin and disposed inside an engine compartment that houses a propulsion engine;
• an outlet door that opens and closes an air outlet through which an air flow from an inside of the engine compartment is blown to another area on a rear side in the vehicle traveling direction with respect to the engine compartment;
• and
• a single introduction duct formed to guide the air flow blown from the air blower to the air outlet,
• wherein,
• the air blower blows an air flow containing exhaust heat of the propulsion engine to the other area through the air outlet while the air outlet is opened by the outlet door;
• the introduction duct forms a return flow outlet through which an air flow from the air blower is blown into the engine compartment, the introduction duct being further formed for guiding the air flow from the air blower to the return flow outlet;
• and
• the air blower blows out an air flow through the return flow outlet of the introduction duct, and the blown out air flow is sucked into the air blower, so that a return air flow passing through the air blower and the introduction duct is generated.