Patent ID: 6663769
Filing Date: 2003-12-16
Classification: C02F,Y02W

Abstract:
A system for utilizing rainwater falling on a building, comprising:an initial precipitation collection tank for temporarily storing a predetermined quantity of initial precipitation; a purifier including a filtering tank and a sterilization tank, the filtering tank containing a pH adjusting agent, and the sterilization tank containing a primary reactive catalyst for producing active oxygen species; a switching valve for switching a water path between the initial precipitation collection tank and the purifier, the switching valve shutting off the rainwater from flowing into the initial precipitation collection tank when the rainwater stored in the initial precipitation collection tank has reached the predetermined quantity and allowing the subsequent rainwater to enter the purifier; a storage tank for storing the purified rainwater supplied from the purifier; and a level sensor connected to and cooperating with the switching valve, and detecting the water level of the storage tank, the level sensor causing the switching valve to shut off the rainwater from entering the purifier if it is detected that the water level of the storage tank has reached a predetermined upper limit.