| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce engine noises while restraining the height of a body cover without deteriorating a cooling performance of a construction machine. SOLUTION: An intake opening 10 and an exhaust opening 11 are installed to a body cover 8 of an upper turning element 1, and a cooling fan 5 in an engine room covered with the body cover 8 is driven, so that cooling wind from the intake opening 10 is taken to cool a heat exchanger 7 in the body cover 8, and is discharged from an exhaust opening 11. The intake opening 10 is offset laterally from a position opposite to a ventilation face of the heat exchanger 7. Or, a plurality of intake openings are randomly provided so as to include an offset opening offset from the ventilation face of the heat exchanger 7 as the intake opening. COPYRIGHT: (C)2005,JPO&NCIPI
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