Evaporator Core

Evaporator is a device which cools and dehumidifies air before it enters vehicle. High-pressure liquid refrigerant flows through expansion tube orifice and becomes a low-pressure gas in evaporator. Heat in air passing through evaporator core is transferred to cooler surface of core, which cools air. As process of heat transfer from air to evaporator core surface is taking place, any moisture or humidity in air condenses on outside surface of evaporator core and is drained off as water.