| 摘要 |
Engine noise of a construction machine is effectively reduced without reducing cooling performance and with an increase in the height of a body cover kept minimum. To achieve the above, an air-intake opening portion ( 10 ) and an air discharge opening portion ( 11 ) are arranged in a body cover ( 8 ) of an upper rotating body ( 1 ), and a cooling fan ( 5 ) in an engine room covered by the body cover ( 8 ) is driven, taking cooling air in from the air-intake opening portion ( 10 ) to cool a heat exchanger ( 7 ) in the body cover ( 8 ) and discharging the air from the air discharge opening portion ( 11 ). The air-intake opening portion ( 10 ) is laterally offset from a position facing to a ventilation surface of the heat exchanger ( 7 ). Alternatively, plural air-intake opening portions are located in a scattered manner such that the plural air-intake opening portions include the offset air-intake opening portion offset from the ventilation surface of the heat exchanger ( 7 ).
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