Engine-operated generator

摘要

A compact engine-operated generator (1) in which only one centrifugal fan (40) for cooling is provided to restrain leakage of operation noise while an engine (30) and a generator (35) can be cooled efficiently. The engine-operated generator (1) has an engine (30) and a generator (35) driven by the engine (30) arranged in a direction of a rotary shaft and accommodated in a soundproof case(2), and comprises the generator (35) which is an outer-rotor type generator; a centrifugal fan (40) provided on an end surface of an outer-rotor of the generator (35) remote from the engine (30); a duct (7, 8, 16) covering the centrifugal fan (40), the generator (35) and the engine (30) and having a suction opening (4a) at a side facing the centrifugal fan; a discharge hole (8a) on a downstream side of the duct (7, 8, 16) facing an exterior of the soundproof case (2); and a circulation space (43) provided between the generator (35) and the engine (30) for introducing a part of cooling air flowing toward the engine (30) into the generator (35) to circulate again to the centrifugal fan (40).