| 摘要 |
A water filter system (10) for home use, includes a valve (34) that passes pressured water from a municipal water supply (30) though the inlet (20) of a passage (14) containing bidirectional filter elements (16) so the water has to pass though the filter elements to reach an outlet (22) that leads to a faucet (24). A water pressuring device (52) such as one that includes a bladder (56), has one side that faces a water outlet storage region (54) and an opposite side that faces a pressing apparatus such as compressed air (64). At intervals such as every 24 hours at 3:00 a.m., a timer (70) operates the control valve to connect the inlet (20) to a drain (50) instead of to the municipal water supply, for a period such as 20 seconds. Then, water backflushes though the bidirectional filter elements to a drain, to clean the filter elements. An ultraviolet light (104) at the outlet storage region kills bacteria to prevent bacteria buildup in the outlet region.
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