Unlike air conditioning units, Dyson Purifiers, Heaters, Fans and Humidifiers have no energy-hungry cooling elements.
They aren't designed to lower the room temperature - they cool you, not the room. The cooling effect comes when the smooth stream of air is projected from the amplifier, and passes over your skin. This is called ‘Wind Chill’.
Simply increase / adjust the speed of the airflow to suit your needs.