Water purifier for use with bottle container

Abstract

A water purifier (1) for use with bottle containers, capable of being installed easily on a bottle container such as a PET bottle and capable of efficiently purifying water by allowing the flow rate of the purified water to be stable, includes a filter case (2) and a filter medium (3) charged therein. Wherein a joint (5) fittable to a filler port (Pm) of the PET bottle (P) is provided at the upstream side end part of the filter case (2), a vent tube (6) extends from the outside of the PET bottle (P) to the inside of the PET bottle (P) through the wall surface of the joint (5) and the filler port (Pm), air flows through the vent tube (6) into the PET bottle when water is passed from the filler port (Pm) through the water purifier (1). At the time of water purification, air flow control means capable of controlling the flow rate of air flowing into the bottle container may be provided in the vent tube (6). An air chamber (14) for expanding the air passage of the vent tube (6) may be provided at midpoint on the vent tube (6), and a funnel part (28b) for collecting the purified water into a water supply hole (M) and allowing the water to flow downward may be provided on the downstream side of the filter case (2).

Dependencies are inferred from the claim text.