Patent ID: 6312609
Filing Date: 2001-11-06
Classification: B01D,C02F

Abstract:
A water purification device including:a purification unit; anda pipe unit to lead water, the pipe unit including at least one flexible pipe connected to the purification unit, the water purification unit being immersed at least partially into water contained in a storage container, the water being led from the storage container into a collecting container located underneath the storage container by means of a syphon pressure caused by a height difference between the purification unit and the collecting container;the purification unit comprising:a filter for purifying the water and including at least one thin, plane shaped filtering film made of plastic based material, being one of a Partial Track Membrane and a Track-etch Membrane, the filtering film having a thickness of about 7-25 micrometers and pores sized about 0.05-10 micrometers; andan auxiliary frame having supporting frame for supporting the filter, the supporting frame formed of a rigid plate structure covered by the filtering films and having two opposite imperforate and essentially plane-shaped supporting side surfaces to which the filtering films are hermetically fastened, each supporting surface having a plurality of projections for forming a flow space between the filtering film and the supporting surface to lead water, that has passed through the filtering film, between the filtering film and the supporting surface through an output pipe fitting provided in the auxiliary frame into the pipe unit, wherein outer surfaces of the filtering films facing away from the opposite supporting surfaces are each covered by a respective casing part, wherein the casing parts are releasably connected to the auxiliary frame by quick-release means in order to enable cleaning of the purification unit.