| 摘要 |
PURPOSE:To obtain the air-conditioning and ventilating fan, small sized, low price, obtaining large air flow when nessary and easy in mounting work by a method wherein the fan is provided with the main body portion which performes a heat exchange and ventilation with a high energy saving effect normally and the fan portion which displays a big effect when large amount of air flow is necessary. CONSTITUTION:A main body is formed by an air exhaust path A A' and air supplying parth B B'. A fan portion is formed as a whole by an indoor side opening 12, a blade 13, a motor 14 and a shutter 15 by which an outlet 16 is opened and closed, futher, back flow is prevented while the fan portion is provided with a ventilating portion C C'. In the main body, the indoor air is discharged to outdoor passing through the air exhaust path A A', on the other hand, the outdoor air is supplied into a room passing through air supplying path B B'. In the fan portion, the indoor air is discharged to the outdoor passing through the ventilating path C C'. In case many people smoke cigarette in the roo, even though the energy saving effect drops a little, the air in the room is necessary to be ventilated quickly. In this case, the good ventilating effect may be obtained by the operation of the fan neighbored to the main body. |
