Abstract: A device for treating water by CDI method according to the present invention comprises a filter unit including first and second filter parts having a water-purifying mode of discharging purified water by purifying raw water and a regeneration mode of regenerating an electrode according to the CDI method; and a control unit for controlling the filter unit. Here, if any one of the first and second filter parts is in the water-purifying mode for a first time, the other one is in the regeneration mode for a second time. In addition, if the water-purifying mode stops in the middle of the first time, the control unit stops the regeneration mode and then performs a first control of flushing the filter part in the regeneration mode with the raw water for a third time.

Abstract: A device for treating water by CDI method according to the present invention comprises a filter unit including first and second filter parts having a water-purifying mode of discharging purified water by purifying raw water and a regeneration mode of regenerating an electrode according to the CDI method; and a control unit for controlling the filter unit, wherein if any one of the first and second filter parts performs the water-purifying mode for a first time, the other one performs the regeneration mode for a second time, and the control unit determines the first time or the second time on the basis of the water-purifying performance of the first filter part and the second filter part.

Abstract: A CDI-type water treatment device according to the present invention comprises: a filter unit for purifying raw water in a CDI type through an electrode part formed by alternately stacking electrodes and separators; and a sterilization unit provided on the front of the filter unit to supply the electrode part with a sterilization substance, which has been generated from the raw water in order to sterilize the electrode part. The sterilization unit, in this case, preferably operates after a predetermined time has passed since the electrode part has both stopped purifying raw water and stopped regenerating the electrodes.

Abstract: A CDI type water treatment apparatus according to the present invention includes: a CDI filter unit which discharges purified water in a purification mode for purifying raw water, discharges recycle water in a recycle mode for recycling electrodes, and includes a water inlet port through which the raw water is introduced and a water outlet port through which the purified water or the recycle water is discharged; a supply unit for supplying the raw water to the CDI filter unit; a dispensing unit for dispensing the purified water to a user; a discharge unit for discharging the recycle water to the outside; a valve unit including a plurality of valves; and a control unit for controlling opening or closing the valves of the valve unit.