| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability or the like of a drive control part by obtaining an effect as that in forced air cooling without installing a cooling fan anew. SOLUTION: An electrical equipment box 27 for housing a drive control section is made up of a housing part 28 and a lid part 29. An air intake port 31 is provided near a side end part of the housing part 28 on the rear side (namely, on the rear side of a ceiling) of an electronic substrate where the drive control section is assembled and an air outflow port 35 near the other end part thereof so that conditioned air in the rear of the ceiling is sent to each room being sucked by a suction force generated with the rotation of a blow fan while the air is sucked into the electric equipment box 27 from the air intake port 31 by the suction force to flow out of the air outflow port 35 force air cooling the drive control section. |
