| 摘要 |
PURPOSE: A building shaft system is provided to improve the ventilation efficiency by blowing air upwards by lowering the pressure towards the top end of a shaft. CONSTITUTION: A building shaft system comprises a shaft(100), a lighting unit(200), a ventilation unit(300), and an underground ventilation unit(400). The inner side of the shaft is sloped outwards for gradual increase of the cross sectional area of the shaft towards the upper side. The underground ventilation unit comprises a heating unit(410) and allows external air to flow in the lower end of the shaft which is positioned in an underground floor. The heating unit raises the temperature of the external air for supplying to the lower end of the shaft. |
