CONSTRUCTION MACHINE ENGINE HOOD, CONSTRUCTION MACHINE ENGINE ROOM CONSTRUCTION, AND CONSTRUCTION MACHINE COOLING DEVICE

The present invention relates to the engine hood, engine room structure, and cooling system in a construction machine. The engine hood includes a hood main body (41) and a plate (41). The hood main body (41) is revolvably installed on an outside of the engine room (2B) of the ceiling surface (22) so as to cover the opening (22a). The hood main body (41) is formed into a configuration bulging upward in a covering posture where the opening (22a) is covered, and has a downstream portion, formed in an axial flow direction (Y) of the cooling fan (25), where a cooling-air discharge port (41ba) is formed. The plate (41) is installed inside the bulging configuration of the hood main body (41), and is also installed at a position vertically away from a ceiling portion of the hood main body (41) and on an engine room (2B) side remote from the discharge port (41ba). The plate (42) forms a predetermined gap (44) between an upstream side thereof and the hood main body (41), and is fixedly installed at a downstream side thereof to the hood main body (41). Therefore, a cooling-air passage (43) is formed between the hood main body (41) and the plate (42) and the cooling-air discharge efficiency is enhanced.