Working principle of "Hongda" evaporative air cooler

Evaporative cooling is to cool and humidify air by water evaporation to absorb heat. Did you ever wonder why you feel cooler by the ocean? It is because hot air is blown over water causing some of the water to evaporate and absorb heat. "Hongda" evaporative air cooler is a new high-tech air cooler working this evaporation principle.