| 摘要 |
PURPOSE:To contrive reduction of ventilation air flow quantity of a whole factory area, by a method wherein works area is divided into a working area where much dust is generated and the outer working area where less dust is generated, and the former working area is provided with an air suction part of an exhaust device and the latter working area is provided with a supply air blowing out part of an air supply device. CONSTITUTION:An air conditioner 3 with a built-in blower 5 is provided on the ceiling part of a works building 1, which is connected with a suction duct 4 having suction opening 6 on its outside. Then, an air supply duct 10 located within a working area A where less dust is generated is installed on a discharge side of the air conditioner 3, and plural branch pipes 11 whose air supply opening 11a and a discharge opening 11b are opened at the lower part of this duct 10 is fixed in a pendant form. On the other hand, as for a working area B where much dust is generated is provided with a blower 9, which serves to act to the inside of the building 1 as air suction side, on the vertical part 8a of a roof 8 located at the upper part so that the dust within the working area B is sucked from a direction (b) and discharged forcibly. |
