LIQUID DISCHARGER

To provide a liquid discharger which can be held by a hand easily, can discharge liquid including nano bubbles, is simplified in a structure, and requires no power.SOLUTION: A liquid discharger 12 comprises: a nano bubble generation structure 30 for generating nano bubbles in liquid by a cavitation; a manual type pump 14 for flowing liquid to the nano bubble generation structure; a handy type bottle 13 for storing the liquid; and a discharge member 15 for discharging liquid in the bottle to outside of the bottle. The nano bubble generation structure has a venturi passage including: an inflow part; a contraction part; and an outflow part. The contraction part is formed of a hole whose cross section is a polygonal shape, the inflow part is preferably formed of an inner face of a pyramid whose cross section is a polygonal shape and is reduced in a diameter following a flowing direction and is connected to the contraction part. Each polygonal shape is preferably, a shape of a triangle, a square, a pentagon or a hexagon.SELECTED DRAWING: Figure 1 【課題】手軽に手に持って、ナノバブルを含む液体を吐出することができ、構造が簡単で、動力が要らない液体吐出器を提供する。【解決手段】液体吐出器１２は、キャビテーションにより液体中にナノバブルを発生させるナノバブル発生構造３０と、ナノバブル発生構造に液体を流す手動式ポンプ１４と、前記液体を貯溜するハンディ型のボトル１３と、ボトル内の前記液体をボトル外へ吐出する吐出部材１５とを含む。ナノバブル発生構造は、流入部と絞り部と流出部とを含むベンチュリー通路を備え、絞り部は断面が多角形の穴からなり、流入部は流れ方向に従い縮径して絞り部に接続する断面が多角形の角錐内面からなるものが好ましい。各多角形は、三角形、四角形、五角形又は六角形が好ましい。【選択図】図１