What type of air does the blower in each cockpit evaporator module pull through the evaporator coils?

The appropriate type of air that the blower in each cockpit evaporator module pulls through the evaporator coils is ambient cockpit air. This air is drawn from the environment directly within the cockpit area rather than air from other sources.

Utilizing ambient cockpit air allows for effective cooling and dehumidification. As the ambient air passes through the evaporator coils, it interacts with the refrigerant within those coils, which absorbs heat from the air. This process cools the air before it is circulated back into the cockpit, ensuring a comfortable environment for the crew.

Using recirculated cabin air limits the system's ability to refresh the air quality, and while filtered outside air can be beneficial in some HVAC systems, it is not the primary air source for the evaporator in this specific module. Pressurized cabin air, while applicable in some contexts, does not describe the specific mechanism of air intake for the evaporator coils. Hence, the method of drawing in ambient cockpit air is the most effective and suitable choice for ensuring proper temperature control and comfort in the cockpit environment.