The working theory of cooling pad ventilator is based on the water vaporized into steam, It means that the air is cooled by water absorbed the energy from the humidity air in case of enthalpy is not changed. The detailed process showed as following:

Step1: The fresh air go through the core part of ventilator.

The water in side net of which temperature is almost the same with wet bulb's temperature get touched with fresh air directly, The water inside the net cools the air along with enthalpy line and the net filters the dirt of the air

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