# US 10,500,543 B2 · Water filtration system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,500,543 B2
- Document ID: US10500543B2
- Status: Granted
- Kind: B2
- Application number: 15/863,687
- Filed: 2018-01-05
- Published: 2018-09-13
- Granted: 2019-12-10
- 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/US10500543B2

## CPC

- B01D 61/12: Controlling or regulating
- B01D 61/025: {Reverse osmosis; Hyperfiltration}
- B01D 61/027: {Nanofiltration}
- B01D 61/04: Feed pretreatment
- B01D 61/081: {used at home, e.g. kitchen}
- 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 1/003: {using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices (C02F9/20 takes precedence)}
- C02F 1/008: {Control or steering systems not provided for elsewhere in subclass C02F}
- C02F 1/441: {by reverse osmosis}
- C02F 9/20: Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
- B01D 2311/252: Recirculation of concentrate
- B01D 2311/2649: Filtration
- B01D 2313/18: Specific valves
- B01D 2313/243: Pumps
- C02F 1/442: {by nanofiltration}
- C02F 2201/004: Seals, connections
- C02F 2201/006: Cartridges
- C02F 2209/03: Pressure
- C02F 2301/046: Recirculation with an external loop
- C02F 2303/04: Disinfection
- C02F 2307/06: Mounted on or being part of a faucet, shower handle or showerhead
- C02F 2307/10: as part of a potable water dispenser, e.g. for use in homes or offices
- 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)
- 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 water filtration system (100) is provided. The water filtration system (100) includes: a filter cartridge assembly (10), a water-intake pipe (20), a purified-water pipeline (30), a pure-water pipeline (40) and a waste discharge pipeline (50). The filter cartridge assembly (10) has a water inlet (110), a purified-water outlet (120), a purified-water return port (130), a pure-water outlet (140) and a waste discharge port (150). The pure-water pipeline (40) is communicated with the pure-water outlet (140), and the pure-water pipeline (40) has a pure-water external port (410) and a second valve (420) configured to control on and off of the pure-water pipeline (40). The waste discharge pipeline (50) has a first end communicated with the waste discharge port (150) and a second end communicated with an outside.

## Claims

### Claim 1

A water filtration system, comprising:
a filter cartridge assembly, wherein the filter cartridge assembly is an integrated composite filter cartridge that has a water inlet for receiving raw water, a purified-water outlet for dispensing purified water that is produced by the integrated composite filter cartridge through a first filtering process, a purified-water return port for receiving at least some of the purified water that is dispensed from the purified water outlet, a pure-water outlet for dispending pure water that is produced by the composite filter cartridge that is produced by the integrated composite filter cartridge through a second filtering process distinct from the first filtering process and a waste discharge port for dispensing waste water that is produced with the pure water by the integrated composite filter cartridge through the second filtering process;
a water-intake pipe communicated with the water inlet;
a purified-water pipeline configured to connect the purified-water outlet to the purified-water return port, the purified-water pipeline being provided with a purified-water external port and a first valve configured to control on and off of the purified-water pipeline;
a pure-water pipeline communicated with the pure-water outlet, the pure-water pipeline being provided with a pure-water external port and a second valve configured to control on and off of the pure-water pipeline;
a waste discharge pipeline having a first end communicated with the waste discharge port and a second end communicated with an outside; and
a circulation pipeline having a first end communicated with the purified-water pipeline and a second end communicated with the waste discharge pipeline,
wherein when the water filtration system produces the purified water using the first filtering process of the integrated composite filter cartridge, the purified-water pipeline is on and the pure-water pipeline is off; when the water filtration system produces the pure water using the second filtering process of the integrated composite filter cartridge, the purified-water pipeline, the pure-water pipeline and the waste discharge pipeline are on respectively.

### Claim 2 (depends on 1)

The water filtration system according to claim 1, further comprising:
a pump assembly configured to drive water in the pure-water pipeline to flow, wherein the pump assembly is disposed in the purified-water pipeline and located between the purified-water external port and the purified-water return port.

### Claim 3 (depends on 2)

The water filtration system according to claim 2, wherein the pump assembly is a booster pump.

### Claim 4 (depends on 2)

The water filtration system according to claim 2, wherein the first valve is located upstream of the pump assembly.

### Claim 5 (depends on 4)

The water filtration system according to claim 4, wherein the first end of the circulation pipeline is connected between the first valve and the pump assembly.

### Claim 6 (depends on 1)

The water filtration system according to claim 1, wherein the first valve is a solenoid valve and the second valve is a check valve.

### Claim 7 (depends on 1)

The water filtration system according to claim 1, wherein the waste discharge pipeline is provided with a third valve configured to control on and off of the waste discharge pipeline.

### Claim 8 (depends on 7)

The water filtration system according to claim 7, wherein the third valve is a solenoid valve.

### Claim 9 (depends on 1)

The water filtration system according to claim 1, wherein the circulation pipeline is provided with a throttle valve.