WATER PURIFICATION SYSTEMS

摘要

A water system is controlled (i.e. has its contents purified) by an ion supply unit, fed directly from the mains supply (15) to the water system and generating ion-laden water (concentrate) which is then injected (via 16) into the water system as required. The ion supply unit comprises a tank (26A), an ioniser (32A), and a pump (33A) which circulates water between the tank and the ioniser. The concentrate is injected into the water system, as water is drawn from the system or at suitable intervals as water circulates in the system. If the system does not use enough water to require replenishment at a rate which can incorporate the required amount of concentrate, a small amount of water can be drained off. Alternatively, the ion supply unit may comprise a reservoir which can be refilled with concentrate generated at and supplied from a central station; the concentrate can be stabilized by acidifying it with citric acid at a pH of 5.5.