| 摘要 |
A control for a water softener includes a sensor (49) for sensing when the resin bed (14) has been depleted to a predetermined percentage of the total resin bed treating capacity. The sensor (49) is connected to a microcomputer which receives from a flow meter (110) data indicative of the quantity of treated water leaving the water treatment device (10) over a given period of time. When the resin bed (14) has been depleted to the predetermined capacity, the microcomputer calculates the total softening capacity of the resin bed. Each day, the microcomputer computes both the total quantity of treated water consumed since the last regeneration and the remaining capacity of the resin bed. The microcomputer also maintains a record of the previous 7 days' usage and calculates the average usage to establish a soft water reserve value. Should the remaining resin bed capacity be less than the established soft water reserve, then regeneration is initiated. |
