| 摘要 |
PROBLEM TO BE SOLVED: To make compact a body outer enclosure panel and to prevent ventilation noise at an outlet by dividing a bell mouth being provided at the outlet into two portions, enabling them to be along nearly an entire region at the outer-periphery side of a blowing fan, and enlarging the outlet side of the first bell mouth, and enlarging the outlet side of the second bell mouth. SOLUTION: A bell mouth 9 is arranged so that it is along the outer- periphery part of a blowing fan 8 where an outlet 4 faces. The bell mouth 9 is composed of a first bell mouth 9a and a second bell mouth 9b that are combined after division, they are allowed to be along nearly the entire region of the outer-periphery part of the blowing fan 8, at the same time the outlet side of the first bell mouth 9a is expanded, and the suction side of the second bell mouth 9b is expanded. As a result, the bell mouth 9 is not in a configuration where it is expanded in an entire-periphery trumpet shape by a sculptured surface only at the suction side of the lower part, thus preventing a size D of an upper panel from increasing and ventilation resistance from increasing at the outlet side of the upper part. |
