PROBLEM TO BE SOLVED: To prevent waste straw, dust and the like from re-adhering to a filtering element.SOLUTION: A structure includes the filtering elements (16 and 24) for filtering outside air which are arranged outside an intercooler (12) and a radiator (21). A dust-exhaust fan (51) is reversed in response to a rotation stop of a radiator fan (26), and a fan (14) for the intercooler is reversed in response to a reverse of the dust-exhaust fan (51).COPYRIGHT: (C)2012,JPO&INPIT【課題】濾過体への藁屑、塵埃等の再付着を防止する。【解決手段】インタークーラ(12)及びラジエータ(21)の外側に配置した外気濾過用の濾過体(16,24)を備え、ラジエータファン(26)の回転停止に対応させて排塵ファン(51)を逆転させると共に、該排塵ファン(51)の逆転に対応させてインタークーラ用ファン(14)を逆転させる構成とした。【選択図】図16
