| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power conversion unit in which sand, dust, rainwater, and the like, are hard to enter the power converter housing chamber, and degradation of exhaust efficiency is minimized. <P>SOLUTION: An exhaust cover 41 includes a peripheral wall 42 surrounding the periphery of an air outlet 11G, an inclined wall 43 which recedes from the side plates 11C, 11D gradually downward from the upper wall 42a of the peripheral wall 42, a longitudinal wall 44 extending in parallel with the side plates 11C, 11D from the lower edge of the inclined wall 43 across the bottom wall 42b, at least one exhaust hole (first exhaust hole) 42c formed in the bottom wall 42b of the peripheral wall 42, an elongated exhaust hole (second exhaust hole) 44a formed in the longitudinal wall 44, an exhaust guide 45 of upward inclination receding from the elongated exhaust hole 44a gradually upward from the lower edge thereof, and a filter member 46 disposed in the exhaust cover 41 so as to cover the air outlet 11G. <P>COPYRIGHT: (C)2013,JPO&INPIT |
