PROBLEM TO BE SOLVED: To improve dust removal effect of a dust prevention net for filtering outside air, in a prime mover chamber cooling apparatus of a combine-harvester, which cools a radiator and the like with outside air sucked by a cooling fan.SOLUTION: A brush moving space 26 is formed between a radiator outer cover 14, in which an outer net 32 is stretched on the outside of a radiator 13 of an engine room 11, and a radiator inner cover 15, which is provided on the inside of the radiator outer cover 14 and in which an inner net 31 is stretched. A dust discharge passage 45, which reaches a cooling fan 12 from the outside of the radiator inner cover 15 through a side part of the radiator 13, is provided. A brush 24a, which comes into rubbing-contact with the inner net 31 of the radiator inner cover 15 when moving forward toward the dust discharge passage 45, is provided in the brush moving space 26. The brush 24a separates from an outer surface of the radiator inner cover 15 during returning movement in which the brush separates from the dust discharge passage 45.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2016,JPO&INPIT【課題】本発明は、冷却ファンの吸引する外気でラジエータ等を冷却するコンバインの原動室冷却装置において、外気を濾過する防塵網の除塵効果を向上することが課題である。【解決手段】エンジンルーム11のラジエータ13の外側に外ネット32を張ったラジエータ外カバー14と、このラジエータ外カバー14の内側に設けられ、内ネット31を張ったラジエータ内カバー15との間にブラシ移動間隙26を形成し、ラジエータ内カバー15の外側からラジエータ13の側部を通って冷却ファン12に至る排塵通路45を設け、前記ブラシ移動間隙26内に排塵通路45に向かう往路移動時にラジエータ内カバー15の内ネット31に擦接するブラシ24aを設け、該ブラシ24aは前記排塵通路45から離れる方向に移動する復路移動時にはラジエータ内カバー15の外側面から離れる。【選択図】図9
