| 摘要 |
PROBLEM TO BE SOLVED: To modify improvingly a conventional artificial ventilation mechanism into a natural ventilation mechanism. SOLUTION: In a system in which the natural convection of outdoor air and indoor air is conducted and indoor air is naturally ventilated, the hexagonal type natural ventilation mechanism is composed of a hexagonal frame material body 1 in which the other end face is formed in size larger than one end face and a honeycomb-shaped hexagonal vent hole is formed to the whole circumferential surface, a hexagonal sound-absorbing conical body 11 absorbing noises in the hexagonal frame material body 1 and a butterfly blade 12 installed on one end section side of the hexagonal sound-absorbing conical body 11 and used for preventing wind pressure. |
