| 摘要 |
The present invention relates to a rainwater harvesting apparatus 10 for automatically collecting only second stage clean rainwater. The apparatus 10 comprises a diversion chamber (20) having an inlet (21) and an outlet (22), a flow regulator (23) is provided below the inlet (21) and is housed within the diversion chamber (20). The flow regulator (23) has a unidirectional passageway (236) and a flap (233) is disposed within the passageway (236). The flap (233) operatively connected to a float (234). The outlet (22) is located between the inlet (21) and the flow regulator (23). In use, first stage contaminant-filled rainwater enters the apparatus (10) via the inlet (21) and fills up the diversion chamber (20). The rise in the level of first stage rainwater in the diversion chamber (20) causes the float (234) to move upwardly resulting in a corresponding upward movement of the flap (233) which results in closing of the passageway (236) to enable trapping of further incoming second stage clean rainwater within the passageway (236). The trapped second stage rainwater exerts further pressure on the flap (233) so as to seal off the passageway (236) resulting in diversion of the trapped second stage rainwater toward the outlet (22) for collection. |
