# US 10,370,269 B2 · Water filtration system

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- Number: US 10,370,269 B2
- Document ID: US10370269B2
- Status: Granted
- Kind: B2
- Application number: 15/861,530
- Filed: 2018-01-03
- Published: 2018-09-13
- Granted: 2019-08-06
- Earliest claimed: 2017-03-07
- Assignees: Foshan Shunde Midea Water Dispenser Mfg. Co., Ltd.; Midea Group Co., Ltd.
- Applicants: Foshan Shunde Midea Water Dispenser Mfg. Co., Ltd.; Midea Group Co., Ltd.
- Inventors: Lyu Yang
- Web page: https://patentgrep.com/patent/US10370269B2

## CPC

- C02F 1/44: by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)}
- B01D 61/027: {Nanofiltration}
- B01D 61/08: Apparatus therefor
- C02F 1/003: {using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices (C02F9/20 takes precedence)}
- C02F 9/20: Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
- C02F 1/001: {Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00)}
- C02F 1/441: {by reverse osmosis}
- C02F 1/442: {by nanofiltration}
- C02F 2201/004: Seals, connections
- C02F 2201/005: Valves
- C02F 2201/006: Cartridges
- C02F 2209/005: Processes using a programmable logic controller [PLC]
- C02F 2209/03: Pressure
- C02F 2209/42: Liquid level
- C02F 2303/24: Separation of coarse particles, e.g. by using sieves or screens
- C02F 2307/10: as part of a potable water dispenser, e.g. for use in homes or offices
- 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)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A water filtration system (100) includes: a raw water inlet (100a); a pure water outlet (100b); a purified water outlet (100c); a waste water outlet (100d); and an integrated filter cartridge (1) having first (10a) through fourth ports (10d), in which the first port (10a) is connected to the raw water inlet (100a), the second port (10b) is connected to the pure water outlet (100b), the purified water outlet (100c) and the waste water outlet (100d) are both connected to the third port (10c), and a water storage device (2) is disposed to at least one of a flow path connected to the pure water outlet (100b) and the fourth port (10d).

## Claims

### Claim 1

A water filtration system, comprising:
a raw water inlet;
a pure water outlet;
a purified water outlet;
a waste water outlet; and
an integrated filter cartridge comprising a pre-filter cartridge, a fine filter cartridge and a post-filter cartridge, and having a first port, a second port, a third port, and a fourth port, wherein
the first port is connected to the raw water inlet, the second port is connected to the pure water outlet, the purified water outlet and the waste water outlet are both connected to the third port, and the fourth port is connected to a water storage device,
a first portion of raw water entering through the raw water inlet is configured to flow out through the pure water outlet after filtered by the pre-filter cartridge, the fine filter cartridge and the post-filter cartridge successively,
a second portion of the raw water entering through the raw water inlet is configured to flow out through the purified water outlet after only filtered by the pre-filter cartridge, and
a third portion of the raw water entering through the raw water inlet is produced as waste water by the integrated filter cartridge and configured to flow out through the waste water outlet.

### Claim 2 (depends on 1)

The water filtration system according to claim 1, wherein a water inlet valve and a booster pump are provided between the first port and the raw water inlet, and the water inlet valve is located upstream of the booster pump.

### Claim 3 (depends on 2)

The water filtration system according to claim 2, wherein the water storage device is provided with a detection device, and when the detection device detects that the water storage device is not full of liquid, a controller of the water filtration system opens the water inlet valve and operates the booster pump.

### Claim 4 (depends on 3)

The water filtration system according to claim 3, wherein the detection device is one selected from the group consisting of a pressure sensor and a liquid level sensor.

### Claim 5 (depends on 2)

The water filtration system according to claim 2, wherein a pre-filtering mesh is disposed between the raw water inlet and the water inlet valve.

### Claim 6 (depends on 1)

The water filtration system according to claim 1, wherein the third port comprises a first sub-port and a second sub-port, the purified water outlet is connected to the first sub-port through a purified water flow path, and the waste water outlet is connected to the second sub-port through a waste water flow path.

### Claim 7 (depends on 1)

The water filtration system according to claim 1, wherein a first one-way valve and a first high pressure switch are provided between the second port and the pure water outlet, and the first one-way valve and the first high pressure switch are integrated together.

### Claim 8 (depends on 1)

The water filtration system according to claim 1, wherein a second one-way valve and a second high pressure switch are provided between the third port and the purified water outlet, and the second one-way valve and the second high pressure switch are integrated together.

### Claim 9 (depends on 1)

The water filtration system according to claim 1, wherein the water storage device is one selected from the group consisting of a water storage bag, a pressure tank, and a water tank.

### Claim 10 (depends on 1)

The water filtration system according to claim 1, wherein the fine filter cartridge is one selected from the group consisting of a reverse osmosis filter cartridge and a nano-filtration membrane filter cartridge.