Water filtration system

Patent metadata

Field	Value
Publication number	US-10414672-B2
Application number	US-201815862480-A
Country	US
Kind code	B2
Filing date	Jan 4, 2018
Priority date	Mar 7, 2017
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A water filtration system (100) includes a filter cartridge assembly (10), a water-inlet conduit (20), a purified-water conduit (30), a pure-water conduit (40), a waste-discharge conduit (50) and a circulation conduit (70). The waste-discharge conduit (50) is in communication with the purified-water conduit (30) and has an end located between a first valve body (320) and a purified-water outlet (120), and the circulation conduit (70) has a first end in communication with the water-inlet conduit (20) and a second end in communication with the waste-discharge conduit (50).

First claim

What is claimed is:

1. A water filtration system, comprising:
a filter cartridge assembly, defining a water inlet, a purified-water outlet and a pure-water outlet;
a water-inlet conduit, in communication with the water inlet and provided with a water-inlet control valve;
a pure-water conduit, in communication with the pure-water outlet;
a purified-water conduit, in communication with the purified-water outlet and having a first valve body configured to control on and off of the purified-water conduit;
a waste-discharge conduit, in communication with the purified-water conduit and having an end located between the first valve body and the purified-water outlet; and
a circulation conduit, having a first end in communication with the water-inlet conduit and a second end in communication with the waste-discharge conduit,
wherein when the water filtration system produces purified water, the purified-water conduit is in an on state, and when the water filtration system produces pure water, the pure-water conduit is in an on state and the waste-discharge conduit is in an on state and the first valve body is closed.

2. The water filtration system according to claim 1 , further comprising:
a pump body assembly provided on the water-inlet conduit, configured to drive water in the pure-water conduit to flow; and
a second valve body located on the pure-water conduit.

3. The water filtration system according to claim 2 , wherein the pump body assembly is located between the water-inlet control valve and the water inlet.

4. The water filtration system according to claim 2 , wherein the first end of the circulation conduit is connected between the water-inlet control valve and the pump body assembly.

5. The water filtration system according to claim 2 , wherein the pump body assembly is configured as a booster pump and the second valve body is configured as a check valve.

6. The water filtration system according to claim 1 , wherein the water-inlet control valve is configured as a solenoid valve.

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

8. The water filtration system according to claim 1 , wherein the third valve body is configured as a solenoid valve.

9. The water filtration system according to claim 1 , further comprising:
a pre-filter mesh provided on the water-inlet conduit and located at an upstream of the water-inlet control valve.

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

Assignees

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

Inventors

• Yang Lyu

Classifications

• C02F2209/03

  Pressure · CPC title

• B01D61/027

  Nanofiltration · CPC title

• B01D61/02

  Reverse osmosis; Hyperfiltration {; Nanofiltration} · CPC title

• C02F2303/04

  Disinfection · CPC title

• C02F1/003

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