| 摘要 |
PURPOSE:To simplify the supporting method of a motor mounting frame by a method wherein the motor mounting frame is housed within a main body casing, on which electrical parts such as a motor and the like is mounted, by being pinched with spiral casings in a combined suction-exhaust ventilating fan, which ventilates with suction flow and with exhaust flow at the same time. CONSTITUTION:Firstly, a motor 20 and geared motor 20' are mounted on the motor mounting frame 17. Secondly, a first fan 21 is mounted at a shaft end of the motor 20. Thirdly, the first spiral casing 16 is placed on an intermediate casing 18 in such a manner as to pinch the motor mounting frame 18 between the casings 16 and 18. Fouthly, after that, a second spiral casing 19 is placed under the intermediate casing 18. Fifthly, a second fan 22 is mounted at the other end the motor 20. Sixthly, the assembly piled up as mentioned above is housed in a main body casing 1b through the opening 30 of the main body casing 1b in order to complete the main body casing 1b. In this case, a rotary type heat exchanger 2, which is laid across the air flow holes of the first spiral casing 16 and of the second spiral casing 19, is housed within a front casing 1a and coupled with the geared motor 20'. |
