| 摘要 |
PURPOSE:To provide sufficient height for a room above the upper floor and a room below the upper floor by installing an air conditioner between the ceiling and the floor of the upper floor, wherein feed air of air conditioning for a floor blowoff port communicating with a room above the upper floor or for a ceiling blowoff port communicating with said room can be changed over by operating a damper. CONSTITUTION:When, by changing over a damper 11, a feed air duct 7A is put into communication with a first downstream side duct 9 through a branch 8 and also the duct 7A is isolated from a second downstream side duct 10 by the damper 11, feed air of air conditioning from an air conditioner 6 flows through the duct 7A, the branch 8, the duct 9, a floor blowoff port 12, and into a room above the upper floor 2A. At this moment, feed air does not flow into a room below the upper floor. In order to feed air into said room, the damper 11 is changed over to the opposite direction to allow the duct 7A to communicate with the duct 10 through the branch 8, while the duct 7A is isolated from the duct 9 by the damper 11. |
