To purify supplied water and evaporate it by a method wherein some hollow threads made of films of permeating threads are arranged in a gas flow passage and either water or heated hot water is supplied into the hollow threads.
A plurality of rows of hollow threads cloth 10 are arranged between an upper part header and a lower part header and they are formed by hollow threads 11 arranged at the hollow thread cloth 10 so as not to be contacted to each other in a substantial vertical orientation and by reinforcing lateral threads 12 for reinforcing the hollow threads 11. Water 13 flowing in the hollow threads 11 as indicated by an arrow (a) is immersed at an outer surface of the hollow threads 11 as indicated by an arrow (b) to form a liquid film at the outer surface of each of the hollow threads 11 as indicated by an arrow (c) and finally evaporates in air as indicated by an arrow (d) while flowing down. Due to this fact, a liquid film immersed in the hollow threads 11 to form the outer surface removes solid elements or germs contained in water flowing in the hollow threads 11 and the liquid is clarified and the humidified air under its evaporation increases a degree of cleanliness. Due to this fact, it is possible to reduce an amount of generated dusts in a humidifying device.
HINO MASAO
HOSHI TOSHINOSUKE
YOSHIDA TETSUO
