# US 2016/0355418 A1 · Cdi-type water treatment device

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- Number: US 2016/0355418 A1
- Document ID: US20160355418A1
- Status: Published application
- Kind: A1
- Application number: 15/103,199
- Filed: 2014-12-09
- Published: 2016-12-08
- Earliest claimed: 2013-12-23
- Assignees: Coway Co., Ltd.
- Applicants: Coway Co., Ltd.
- Inventors: Soo Young LEE; Tae Seong KWON; Hyoung Min MOON; Byung Kil PARK; Sung Min MOON
- Web page: https://patentgrep.com/patent/US20160355418A1

## CPC

- C02F 1/4691: {Capacitive deionisation}
- C02F 1/4674: {with halogen or compound of halogens, e.g. chlorine, bromine}
- C02F 2001/46142: {Catalytic coating}
- C02F 2201/48: Devices for applying magnetic or electric fields
- C02F 2209/005: Processes using a programmable logic controller [PLC]
- C02F 2209/10: Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
- C02F 2209/40: Liquid flow rate
- C02F 2303/04: Disinfection
- C02F 2305/02: Specific form of oxidant
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## 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.

## Claims

### Claim 1

A CDI-type water treatment device, comprising:
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.

### Claim 2 (depends on 1)

The device of claim 1, wherein the sterilization unit reduces chlorine ion (Cl—) in the raw water to chlorine (Cl2) in order to generate the sterilization substance in the raw water.

### Claim 3 (depends on 2)

The device of claim 2, wherein the sterilization unit comprises:
a sterilization terminal part coated with ruthenium oxide (RuOx); and
a sterilization case part accommodating the sterilization terminal part.

### Claim 4 (depends on 3)

The device of claim 3, wherein the device further comprises a control unit controlling power supplied to the sterilization terminal part.

### Claim 5 (depends on 4)

The device of claim 4, wherein among a water-purifying mode for purifying the raw water at the electrode part, a regeneration mode for regenerating an electrode of the electrode part, and a sterilization mode for sterilizing bacteria in the electrode part, the control unit performs a control of supplying power to the sterilization terminal part when in the sterilization mode.

### Claim 6 (depends on 5)

The device of claim 5, wherein the sterilization mode is performed after a predetermined time passes with the water-purifying mode and the regeneration mode not performed.

### Claim 7 (depends on 5)

The device of claim 5, wherein the control unit controls a strength of power to be supplied to the sterilization terminal part in the sterilization mode according to total dissolved solids (TDS) of the raw water.

### Claim 8 (depends on 5)

The device of claim 5, wherein the control unit controls a strength of power to be supplied to the sterilization terminal part in the sterilization mode according to a strength of current flowing in the electrode part when a certain voltage is applied to the electrode part in the water-purifying mode.

### Claim 9 (depends on 1)

The device of claim 1, wherein the filter unit discharges purified water in a water-purifying mode for purifying raw water at the electrode part, discharges regeneration water in a regeneration mode for regenerating an electrode of the electrode part, has an inlet to which the raw water is supplied and an outlet from which the purified water or the regeneration water is discharged, and comprises a filter case part accommodating the electrode part.

### Claim 10 (depends on 9)

The device of claim 9, wherein the raw water is supplied to the inlet or outlet through the sterilization unit.

### Claim 11 (depends on 9)

The device of claim 9, wherein the raw water is supplied to the inlet through the sterilization unit by a first flow rate during the operation of the sterilization unit for a first sterilization for the electrode part.

### Claim 12 (depends on 11)

The device of claim 11, wherein the raw water is supplied to the outlet through the sterilization unit by a second flow rate during the operation of the sterilization unit for a second sterilization for the electrode part.

### Claim 13 (depends on 12)

The device of claim 12, wherein the raw water is supplied to the outlet through the sterilization unit by a third flow rate, which is greater than the first flow rate or the second flow rate, for back washing of the electrode part.

### Claim 14

(canceled)

### Claim 15

(canceled)

### Claim 16 (depends on 9)

The device of claim 9, wherein the device further comprises:
a supply unit supplying the raw water to the filter unit;
a purge unit purging the purified water to a user;
a discharge unit discharging the regeneration water to the outside;
a valve unit including a supply valve installed on a flow path passing from the supply unit to the inlet; a purge valve installed on a flow path passing from the outlet to the purge unit; a discharge valve installed on a flow path passing from the outlet to the discharge unit; a washing valve installed on a flow path passing from a front of the supply valve to the outlet; and a drain valve installed on a flow path passing from a rear of the supply valve to the outside; and
a control unit controlling an opening and closing of the valves.

### Claim 17 (depends on 16)

The device of claim 16, wherein the control unit performs a control of opening the supply valve, closing the discharge valve, opening the purge valve, closing the washing valve, and closing the drain valve, during non-operation of the sterilization unit in the water-purifying mode.

### Claim 18 (depends on 16)

The device of claim 16, wherein the control unit performs a control of opening the supply valve, opening the discharge valve, closing the purge valve, closing the washing valve, and closing the drain valve, during non-operation of the sterilization unit in the regeneration mode.

### Claim 19 (depends on 16)

The device of claim 16, wherein the control unit performs a control of opening the supply valve, opening the discharge valve, closing the purge valve, closing the washing valve, and closing the drain valve, during operation of the sterilization unit for a first sterilization for the electrode part in the sterilization mode.

### Claim 20 (depends on 19)

The device of claim 19, wherein the control unit performs a control of closing the supply valve, closing the discharge valve, closing the purge valve, opening the washing valve, and opening the drain valve, during operation of the sterilization unit for a second sterilization for the electrode part in the sterilization mode.

### Claim 21 (depends on 20)

The device of claim 20, wherein the control unit performs a control of closing the supply valve, closing the discharge valve, closing the purge valve, opening the washing valve, and opening the drain valve for back washing of the electrode part in the sterilization mode.

### Claim 22

(canceled)

### Claim 23

(canceled)