| 摘要 |
PURPOSE:To reduce the size of a device and to improve a cooling effect, by a method wherein an auxiliary internal air introduction port with an auxiliary damper is formed to an external air switching damper, and during operation of a damper through introduction of external air, an auxiliary internal air introduction port is opened. CONSTITUTION:By controlling an internal and external air switching lever to the external air side, an internal and external air switching damper 16 opens an external air introduction port 14 through a link mechanism 15 and a rotary support shaft 20, and external air A is introduced in an internal and external air switching device 11. In this case, with a cooler switched ON, an auxiliary damper 18 is moved to a position shown by a 2-dot chaine line through a link mechanism 22 and a rotary support shaft 19, and only an auxiliary internal air introduction port 17 is opened. This constitution forces a part of cooled air B in a car room to be introduced in the internal and external air switching device 11. Thus, a cooling effect is improved compared with that available when 100% internal air is introduced. |
