Evaporador drain with poor capacity

[rhlg]

Hello Gents,

We´re facing problems with a evaporador drain that is not working properly. Almost the whole condensate in the tray is being captured by the airflow (entrainment). Once the evaporador blower is turned off, the drain is able to remove the condensate.

It is a evaporator configuration where the drain is located in the negative pressure side. I see problems with the 90° bend drain configuration used and the low internal diameter (4 mm). The rate of condensation is 2 liters/hour.

Does anyone have some material or recommendations for designing the evaporators drains ?

Thank you,