Refrigerant enters the evaporator coil as a cold low pressure liquid. As this liquid passes through the evaporator coil, heat moves from the warm air blowing across the evaporator fins into cooler refrigerant. This air that has now been cooled is then ducted into the cabin via the blower motor.
When there is enough heat to cause a change of state, a large amount of heat moves from the air to the refrigerant. This causes the refrigerant to change from a low pressure cold liquid into a cold vapor.
As the warmer air blows across the evaporator fins, moisture contained in that air (humidity) will condense on the cooler evaporator fins. Condensed moisture then runs off through the drain tubes located at the underside of the evaporator case. |
