WASHER

To provide a washer capable of preventing deterioration of an appearance by making a bubble generation structure inconspicuous from an outside of a chamber, suppressing dissipation of bubbles during movement of the bubbles to a discharge member, by making the bubble generated in washer liquid in the bubble generation structure into nano bubbles, thereby achieving great washing ability.SOLUTION: A washer comprises: nano bubble generation structures 30, 40 for generating nano bubbles in washer liquid and being arranged in a chamber; discharge members 31, 41 which are arranged at outside of a chamber, and discharge the washer liquid to a washing object at an outside of the chamber; and pipes 32, 42 for guiding the washer liquid to the discharge members from the nano bubble generation structures. The nano bubble generation structures comprise 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】気泡発生構造が室外から見えないようにして外観の低下を防ぐとともに、気泡発生構造でウォッシャ液中に発生する気泡をナノバブルとすることにより吐出部材までの移動中にほとんど消滅しないようにし、高い洗浄能力を得る。【解決手段】 ウォッシャは、室内に配されウォッシャ液中にナノバブルを発生させるナノバブル発生構造３０，４０と、室外に配され室外の洗浄対象物にウォッシャ液を吐出する吐出部材３１，４１と、ナノバブル発生構造から吐出部材へウォッシャ液を導く配管３２，４２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