| 摘要 |
PURPOSE:To enable an enough blowing off of conditioned air from a supply opening without the need for the wide increase in the capacity of a main blower, by locating an auxiliary blower and a damper at the inside of a dust. CONSTITUTION:Conditioned air is fed into a branch box 15 from a main blower, a part thereof being blown off from a central supply opening. The remaining air is fed to a right duct 21 and a left duct 40. A damper 30, which is closed by means of an auxiliary blower 27 and a coil spring 40, is located at the right duct 21, the left duct 40 being also equipped with the same system as described above. The auxiliary blower 27 sucks and blows air blown off from a right supply opening 25, and air at the outside of the duct may also be blown off when a difference in the pressure between the inside and the outside is provided as a result of conditioned air being short. The location of the auxiliary blower reduces the resistance at the inside of the duct, and increases an overall airflow. Particularly a blow-off volume from the right and left supply openings increases, and thereby a cool feeling on passengers can be improved. |
