PROBLEM TO BE SOLVED: To enhance working efficiency of a combined harvester by preventing overheat of an engine, by blowing away dust-dirt sticking to a wide range of an outside surface of a dustproof net.SOLUTION: A dust removing device (21) is oppositely arranged on the outside surface of the dustproof net (16) arranged in a starting end part of a cooling air duct, and the dust removing device (21) is constituted of a cross-sectional flow fan (22) and a fan case (23) for covering the cross-sectional flow fan (22). The cross-sectional flow fan (22) is constituted of a fan shaft (22a), fan side plates (22b and 22b) installed on both sides of the fan shaft (22a) and blade plates (22c, etc.) installed along the radiator direction in an outer peripheral part of the fan side plates (22b and 22b). The fan case (23) is formed with a suction port (23a) for sucking outside air inside, and a blowout clearance (23b) for blowing off dust removing air along the outside surface of the dustproof net (16).COPYRIGHT: (C)2012,JPO&INPIT【課題】防塵ネットの外側面の広範囲に付着している塵埃を吹き飛ばせるものとし、エンジンのオーバーヒートを防止してコンバインの作業能率を高める。【解決手段】冷却風路の始端部に設けた防塵ネット(16)の外側面に除塵装置(21)を対向させて設け、除塵装置(21)を横断流ファン(22)と該横断流ファン(22)を被覆するファンケース(23)とで構成し、横断流ファン(22)をファン軸(22a)と、ファン軸(22a)の両側に取り付けたファン側板(22b,22b)と、ファン側板(22b,22b)の外周部に放射体方向に沿うように取り付けた羽根板(22c,…)とで構成し、ファンケース(23)には外気を吸入する吸入口(23a)と防塵ネット(16)の外側面に沿うように除塵風を吹き出す吹き出し間隙(23b)を形成する。【選択図】図4
