| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceiling is built-in type heat exchanging-ventilation device of which assembly is simple and manufacturing cost is low. SOLUTION: A fan casing 18 storing vane wheels 21, 22 is constituted of a first divided segment 19 and a second divided segment 20 divided into an upper section and a lower section with a driving shaft 15a of a motor 15 as a border. The second divided segment 20, the motor 15 having the vane wheel and the first divided segment 19 are assembled in this order and stacked from each other into a main body casing 1 having an opening in its down face through the opening 1a so as to complete a fan device U. In the conventional system, each of the component parts constituting the fan was required to be assembled temporarily, although this assembling operation can be eliminated in the present invention and its manufacturing cost can be made less-expensive through reduction in assembling steps. |
