| 摘要 |
A water purifier (1) for bottle container, capable of being installed easily on a bottle container such as PET bottle and capable of efficiently purifyin g water by allowing the flow rate of the purified water to be stable, comprisi ng 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) throug h the wall surface of the joint (5) and the filler port (Pm), air flows throug h 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 chamb er (14) expanding the air passage of the vent tube (6) may be provided at a midpoint in the vent tube (6), and a funnel part (28b) collecting the purifi ed water into a water supply hole (M) and allowing the water to flow downward m ay be provided on the downstream side of the filter case (2).
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