What is the role of the evaporator blower in the cockpit air conditioning system?

The evaporator blower plays a crucial role in the cockpit air conditioning system by actively circulating the air that has been cooled by the evaporator coil. This cooling process involves the refrigerant absorbing heat from the air, thus lowering the air temperature. The blower ensures that this cooled air is effectively distributed throughout the cockpit, helping maintain a comfortable environment for the pilots and passengers.

The other roles mentioned in the choices do not accurately align with the primary function of the evaporator blower. While the system may involve elements of heating and filtering air, those processes are typically managed by other components of the cockpit climate control system. Therefore, the specific function of the evaporator blower is focused on cooling and circulating the air in the cockpit, making it essential for achieving the desired thermal comfort.