| 摘要 |
PURPOSE:To get a less-expensive ventilation fan of which installing characteristic is superior by a method wherein the ventilation fan is provided with an air blower forming a discharging passage communicating with a discharging port and a suction port, partition plates crossing at a right angle to each other are arranged at both ends to external connection ports and a pipe joint having bent partition walls cooperating with the partition plates at both ends. CONSTITUTION:Indoor air flow from a suction port 15 through a discharging port 20 and from an air supplying port 19 to a discharging port 14, a heat exchanging operation is carried out by a heat exchanger 35 and a concurrent sucking and discharging operation is carried out. In this case, the discharging flow from the discharging port 20 is rotated by 90 deg. by a pipe joint 21, discharged from a weather cover main body 27 through a double-layered pipe duct 25. Suction flow sucked from the weather cover main body 27 passes through the double-layered pipe duct 25 and is rotated by 90 deg. by the pipe joint 21. The air is supplied through the suction port 19 to the main body 12. With such an arrangement, in the event that the main body 12 is charged for its position by 90 deg. and installed at a wall 26, this can be accommodated only with the pipe joint 21 without changing angles of the weather cover main body 27, panel 28 and the double-layered pipe duct 25. |
