METHOD AND DEVICE FOR CONTROLLING WATER HARDNESS IN A DWELLING

摘要

A method and device for controlling water hardness in a dwelling, including a water consumption circuit. The supply water for the dwelling is first introduced into a dynamic storage device, and then, at the outlet of the dynamic storage device, is introduced either into the water consumption circuit of the dwelling or into a purification circuit, depending upon the degree of hardness of the supply water. The purification circuit includes a pump followed by an anti-clogging device followed by an osmosis unit, a filtration device or an ultrafiltration device. Next, the “pure water” leaving the osmosis unit, the filtration device or the ultrafiltration device is reintroduced into the dynamic storage device, while the water rejected by the osmosis unit, the filtration device or the ultrafiltration device is filtered and decanted in a filtration and decantation device and then reinjected into the purification circuit by the pump. Additionally, the “pure water” from the dynamic storage tank having a degree of hardness below a predefined threshold value is introduced into the consumption circuit of the dwelling through a mixing unit so as to produce a water mixture having a hardness of between 8° fH and 12° fH. The dynamic storage circuit includes a tube wound about itself into a coil and having a length equal to or greater than 10 m.