| 摘要 |
PURPOSE:To simplify the construction and facilitate the installation of a duct by connecting a first duct having blow-out ports to both first and second decks and a second duct having blow-out ports to the second deck, to the air discharge port of an air conditioning unit, and closing said second duct in the case of a heater mode. CONSTITUTION:A first duct 21 having blow-out ports 22 to a first-deck bus room 3 and blow-out ports 23 to a second-deck bus room 4, and a second duct 25 having only blow-out ports 26 to the second-deck bus room 4, are connected to the air discharge outlet 12 of an air conditioning unit 10 via a switch duct 27. A switch damper 33 is provided in this switch duct 27, and placed in the position of the dotted line (b) by means of an actuator 32 to shut off connection to the second duct 25 at the time of a heater mode. Thus, by forming the first duct 21 to be combinedly usable for both cold air and warm air, the construction of a duct can be simplified while facilitating its installation. |
