| 摘要 |
PURPOSE:To enable to adjust the air flow of respective blowoff ports individually by a structure wherein flow adjusting devices with low pressure loss are provided at a plurality of the blowoff ports arranged in the ceiling. CONSTITUTION:Air supply branch duct 5, which is branched from an air supply main duct 4, are provided in the plenum chamber 3 surrounded with floor 1 and ceiling 2 and the flow adjusting blowoff ports 6 are arranged in the ceiling 2. In addition, a rod 9 equipped with a vane 8 is vertically and shiftably mounted at the center of a diffuser-shape blowoff port body 7 installed at each of the blowoff ports 6. In other words, the flow adjusting device consists in adjusting the air flow by changing draft resistance due to the change of the dimension (a) with the vertical motion of the vane 8. Owing to the structure as described above, the pressure loss of the flow adjusting device is as low as below 2mm.Aq at the opening of 70% and the air pressure below 5mm.Aq in the chamber 3 is enough for draft under the employment of said devices, resulting in enabling to execute satisfactory ceiling work with ordinary ceiling process. |
