ENGINE ROOM STRUCTURE OF AND COOLING DEVICE OF CONSTRUCTION MACHINE

The present invention relates to the engine room structure and cooling system in a construction machine. A discharge duct (32) is installed on the outside of an engine roommain body (21) so as to cover a discharge opening (22a) provided in an engine room (2B). A dimension and arrangement, in an axial flow direction (Y) of an cooling fan (25), of the discharge duct (32) are set so that the discharge duct (32) covers the engine (26) and the muffler (26a) in the axial flow direction (Y). The engine sound and the noise radiated from a muffler (26a) can be effectively intercepted by two wall surfaces, an engine room wall surface (21) and a duct wall surface (32), so the noise can be considerably reduced.