Water filtration system

Patent metadata

Field	Value
Publication number	US-2018257948-A1
Application number	US-201715857390-A
Country	US
Kind code	A1
Filing date	Dec 28, 2017
Priority date	Mar 7, 2017
Publication date	Sep 13, 2018
Grant date	—

Abstract

A water filtration system includes a raw water inlet; a pure water outlet; a purified water outlet; a waste water outlet; an integrated filter cartridge having first through sixth ports, of which the third port is connected to a first end of a communication flow path, and a second end of the communication flow path is connected to the second port and the purified water outlet, a water storage device is disposed to at least one of a flow path connected to the pure water outlet and the sixth port; and a return flow path having a first end connected to the purified water outlet and the second port and a second end connected to the waste water outlet and the fifth port.

First claim

What is claimed is:

1 . A water filtration system comprising:
a raw water inlet; a pure water outlet; a purified water outlet; a waste water outlet; 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, a fourth port, a fifth port and a sixth port, wherein the first port is connected to the raw water inlet, the second port is connected to the purified water outlet, a first end of the communication flow path is connected to the third port, a second end of the communication flow path is connected to the second port and the purified water outlet, the fourth port is connected to the pure water outlet, raw water entering the raw water inlet is configured to flow out through the pure water outlet after being filtered by the pre-filter cartridge, the fine filter cartridge and the post-filter cartridge successively, the raw water entering the raw water inlet is configured to flow out through the purified water outlet after being only filtered by the pre-filter cartridge, the fifth port is connected to the waste water outlet, and a water storage device is disposed to at least one of a flow path connected to the pure water outlet and the sixth port; and a return flow path having a first end connected to the purified water outlet and the second port and a second end connected to the waste water outlet and the fifth port.

2 . The water filtration system according to claim 1 , wherein the return flow path is provided with a throttle valve.

3 . The water filtration system according to claim 1 , wherein the return flow path is provided with a flow control valve.

4 . The water filtration system according to claim 1 , wherein the return flow path is provided with a switch.

5 . The water filtration system according to claim 1 , wherein the pre-filter cartridge is disposed separately from the fine filter cartridge and the post-filter cartridge.

6 . The water filtration system according to claim 1 , wherein a flow path connected to the waste water outlet is provided with a waste water valve.

7 . The water filtration system according to claim 1 , wherein a water inlet valve and a booster pump are disposed between the second port and the purified water outlet, the water inlet valve is located between the purified water outlet and the booster pump, the second end of the communication flow path is located at a side of the water inlet valve adjacent to the purified water outlet, and the first end of the return flow path is located between the water inlet valve and the booster pump.

8 . The water filtration system according to claim 7 , wherein the water storage device is provided with a detection device, the detection device comprises at least one of a pressure detection device and a liquid level detection device, and after the detection device detects that the water storage device is not full of liquid, a controller of the water filtration system is triggered to control the water inlet valve to open and controls the booster pump to operate.

9 . The water filtration system according to claim 1 , wherein a pre-filtering mesh is disposed between the first port and the raw water inlet.

10 . The water filtration system according to claim 1 , wherein a one-way valve and a high pressure switch are disposed between the fourth port and the pure water outlet, and the one-way valve and the high pressure switch are integrated into one piece.

11 . 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.

12 . 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 nanofiltration membrane filter cartridge.

Assignees

• Foshan Shunde Midea Water Dispenser Mfg Co Ltd
• Midea Group Co Ltd

Inventors

• Yang Lyu

Classifications

• C02F9/20

  Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems · CPC title

• C02F1/003 Primary

  using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices (C02F9/20 takes precedence) · CPC title

• C02F2209/42

  Liquid level · CPC title

• C02F2201/006

  Cartridges · CPC title

• C02F2209/03

  Pressure · CPC title