| 摘要 |
PURPOSE:To eliminate arrangement of a duct at the back of a ceiling and to perform reliable and easy execution of a connection work by a method wherein through a cylindrical duct member having an upper opening part and a lower opening, opened to a space at the back of a ceiling, and an expansion contraction part located at a part thereof in a communication direction, the opening of the lower panel of a duct panel communicates with a supply opening formed in a ceiling therebelow. CONSTITUTION:A damper 16 is previously assembled to a blowout box 15. Further, a bellows part 13C and a rigid part 13D are interconnected to form a duct member 13. In this case, the bellows part 13 is previously brought into a contracting state. The blowout box 15 to which a damper 16 is previously assembled is mounted on a supply opening 12A opened to a ceiling 12. A duct member 13 is connected to the upper surface of the ceiling 12 in such a state to cover the blowout box therewith and the upper end of the duct member 13 is connected to a lower panel 11C in such a way that the bellows 13C is expanded and communicating with an opening 11D. Further, a grill 12B is assembled in the supply opening 12A. This constitution eliminates a need for arrangement of a heat insulation duct, eliminates complicated execution of the work thereof, performs reliable and easy connection even at a limited space at the back of a ceiling, and reduces a possibility of defective connection occurring. |
