| 摘要 |
PURPOSE:To improve performances of air exhaust and air suction, prevent an exhausting bell-mouthed part of a decorative frame from having a sink mark and warpage, and prevent the whole of the decorative frame from being deformed. CONSTITUTION:A reversible driving motor 16 is disposed in a body frame 10 for rotating a fan blade 18, and a synthetic resin decorative frame 26 is removably mounted on an indoor side opening 13 in the body frame 10. The fan blade 18 is surrounded by an exhausting bell-mounted part 28 of the decorative frame. On this case, the decorative frame 26 is formed by a PFP(Partial Frame Process), in which the exhausting bell-mounted part 28 is a hollow one, and a circular arc-shaped sucking bell-mounted part 30 is formed on an outdoor side tip end of the exhausting bell-mounted part 28 such that it has a greater diameter as it goes to the outdoor side. |
