초록 ▼

A structure for venting of gasses from fluids, and in particular, venting of gasses from filter elements or filter media used in water treatment devices. The structure incorporates a fluid flow diverter having a vent tube, tangential flow diverter and a lower air collection space to vent air from an

A structure for venting of gasses from fluids, and in particular, venting of gasses from filter elements or filter media used in water treatment devices. The structure incorporates a fluid flow diverter having a vent tube, tangential flow diverter and a lower air collection space to vent air from an interface between stages of the filter cartridge. The vent structure is particularly suited to systems having a pressure drop of 1 psi or less, such as those systems which filter a fluid by a pressure differential generated by gravity alone, or aided by a manual pressurization means. There is also disclosed a multi-stage filter cartridge, incorporating the vent structure, and having an upper stage including granular carbon and a lower stage including a plurality of hollow fibers.

대표청구항 ▼

1. A gravity-fed fluid filter, comprising: a housing having at least one fluid entry port and at least one filtered fluid exit port; a first filtration medium disposed intermediate to said fluid entry port and filtered fluid exit port; a second filtration medium disposed intermediate to said fi

1. A gravity-fed fluid filter, comprising: a housing having at least one fluid entry port and at least one filtered fluid exit port; a first filtration medium disposed intermediate to said fluid entry port and filtered fluid exit port; a second filtration medium disposed intermediate to said first filtration medium and said filtered fluid exit port; a venting system disposed intermediate to said first and second filtration media, said venting system including a tangential fluid diverter configured and arranged to separate a fluid flow into a first region of liquid flow and a second region of non-liquid flow to thereby vent gases therefrom, said gasses being vented countercurrently to said fluid flow whereby an air-to-air interface is maintained. 2. The filter of claim 1, wherein said first filtration medium includes carbon and said second filtration medium includes a membrane. 3. The filter of claim 2, wherein said first filtration medium includes an ion-exchange resin and said second filtration medium comprises a plurality of hollow fibers. 4. The filter of claim 1, wherein said tangential fluid diverter is in the form of an inverted funnel. 5. The filter of claim 1, wherein said filter yields an effluent rate of at least 30 cm3/min at a pressure differential of 1.0 psi or less. 6. The filter of claim 1, wherein said venting system includes air collection means and air exhausting means.