PROBLEM TO BE SOLVED: To provide a mist generator which is capable of efficiently generating fine mist.SOLUTION: A mist generator includes: a rotational substrate 70 which is rotatably driven and fluid feeding means 9 for feeding a mist generating fluid 8 to the rotational substrate 70. In the mist generator, annular arrays 82 of collision walls with collision walls 81 and fluid passages 83 alternately arranged are provided at least doubly in a radial direction in a state of surrounding a rotation center of the rotational substrate 70. The arrays 82 of collision walls are arranged in a state that the collision walls 81 constituting an outer side array 82 of collision walls are facing the fluid passages 83 of an inner side array 82 of collision walls. A width dimension W of the collision walls 81 in a circumferential direction of the rotational substrate 70, a thickness dimension T of the collision walls 81 in the radial direction of the rotational substrate 70, and a protrusion dimension H of the collision walls 81 are set so that relationships W>H and W>T are satisfied.COPYRIGHT: (C)2014,JPO&INPIT【課題】効率的に微細なミストを生成できるミスト発生装置を提供する。【解決手段】回転駆動される回転基板70と、ミスト生成用の液体8を回転基板70に送給する液体送給手段9とを備えている。衝突壁81と液体通路83とを交互に配置してなる環状の衝突壁列82を、回転基板70の回転中心を囲む状態で、径方向へ少なくとも二重に設けている。各衝突壁列82は、外側の衝突壁列82を構成する衝突壁81が、内側の衝突壁列82の液体通路83と対向する状態で配置されている。回転基板70の周方向に係る衝突壁81の幅寸法Wと、回転基板70の径方向に係る衝突壁81の厚み寸法Tと、衝突壁81の突出寸法Hとが、W>H、W>Tの関係を満たすように設定されている。【選択図】図1
