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) and a waste-discharge conduit (50). The filter cartridge assembly (10) has a water inlet (110), a purified-water outlet (120) and a purified-water outlet (140). The water-inlet conduit (20) is in communication with the water inlet (110). The pure-water conduit (40) is in communication with the pure-water outlet (140). The purified-water conduit (30) is in communication with the purified-water outlet (120) and has a first valve body (320) configured to control on and off of the purified-water conduit (30). The waste-discharge conduit (50) is in communication with the purified-water conduit (30).

A method for managing an operation of a reverse osmosis membrane device, includes managing the operation of the reverse osmosis membrane device based on an aluminum ion concentration and/or an iron ion concentration of a feed water and/or a concentrated water of the reverse osmosis membrane device. Any one or more of suitability of a raw water as the feed water, a water temperature of the feed water, a concentration ratio (recovery rate), a pressure (feed water supply pressure, concentrated water pressure, or treated water pressure of the reverse osmosis membrane), an amount of the concentrated water, a continuous operation period, a washing time, a wash frequency, and a timing of replacement of the reverse osmosis membrane are managed based on the aluminum ion concentration and/or the iron ion concentration of the feed water and/or the concentrated water.

A method for operating an on-board water supply and distribution system of an aircraft for supplying water includes a central tank, consumer assemblies with a supply device and a buffer tank, pump operable in a supply mode and reverse mode, filter device, and high-pressure conduit system. The central tank connects to the pump's upstream side. The conduit system connects the downstream side and consumer assemblies. The pump in supply mode delivers water from the downstream side to the buffer tank. In reverse mode, the pump can convey water from the downstream side to the upstream side. The method includes operating the pump in supply mode so water from the central tank goes to a consumer assembly in a first time interval to fill the buffer tank, and operating the pump in reverse mode in a second time interval so water from the buffer tank passes through the filter device.

A reverse osmosis filtration system (100, 100A, 100B, 100C), comprising: a raw water pipeline (L1); a reverse osmosis filtration unit (10, 10A, 10B, 10C) configured to filter raw water supplied by the raw water pipeline (L1); and a faucet (30, 30A, 30B, 30C) connected to the reverse osmosis filtration unit (10, 10A, 10B, 10C), wherein the faucet (30, 30A, 30B, 30C) is operable such that a water outlet (33) of the faucet (30, 30A, 30B, 30C) is selectively in communication with a product water outflow pipeline of the reverse osmosis filtration unit (10, 10A, 10B, 10C). The reverse osmosis filtration system (100, 100A, 100B, 100C) further comprises a pump unit (50, 50A, 50B, 50C) arranged between the raw water pipeline (L1) and the reverse osmosis filtration unit (10, 10A, 10B, 10C), wherein the pump unit (50, 50A, 50B, 50C) is configured to selectively pump the raw water in the raw water pipeline (L1) to the reverse osmosis filtration unit (10, 10A, 10B, 10C) according to a pressure in the product water outflow pipeline. The reverse osmosis filtration system (100, 100A, 100B, 100C) can operate stably even when a pressure in the raw water pipeline (L1) is low, can provide the operation stability of the reverse osmosis filtration system (100, 100A, 100B, 100C), and can realize on-demand water supply for the reverse osmosis filtration unit (10, 10A, 10B, 10C).

The invention relates to liquid purification and/or desalination systems, predominantly water from different sources, and is used in household and/or drinking water supply, in suburb and country houses. Liquid purification system, comprising of raw liquid line with the inlet valve, reverse osmosis membrane connected to drainage line and purified liquid line and purified liquid consumption line and purified liquid vessel, secondary purified liquid line, connected to purified liquid vessel and to raw liquid line and to console panel, characterized in that debris layer on the reverse osmosis membrane is near totally dissolved by intensive repeated flushing of the reverse osmosis membrane with purified liquid.

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.

An apparatus that treats salt-containing water by reverse osmosis, in which the salt-containing water is separated into a permeate stream and a concentrate stream, includes an inlet for the salt-containing water; an outlet for the permeate; an outlet for the concentrate, and a reverse osmosis device, wherein the inlet and the outlets are integrated into a base unit adapted for installation in a positionally fixed manner, and the reverse osmosis device is an exchangeable unit detachably connected to the base unit.

A manifold for domestic water purification systems having flow paths that can be redirected without having to change the physical structure of the manifold or water purification systema structure to assist with proper installation of specific filter cartridges, a memory reader for processing data relating to the state of the filter cartridges, a hinge system to allow for easier installation/removal of new and replacement filter cartridges, and a flow path structure to assist in adding accessories to the water filtration system without requiring a modification to the manifold structure.

Disclosed is a reversing valve. The reversing valve controls the position change of a valve element thereof under the joint action of the total changing pressure from a piston side thereof and a compression spring side thereof to make connection and disconnection between different chambers in the reversing valve, so that the reversing valve can control connection and disconnection of relevant waterways. The reversing valve adopts a purely mechanical design and has characteristics of high reliability and fast switching. Also disclosed is a household water purifier including the reversing valve.

A water purifier includes a water purifier body including a housing and a filter provided in the housing to filter raw water introduced from outside of the water purifier body. A water discharge module including a water discharge nozzle is disposed on a front surface of the water purifier body to supply the water passing through the filter to the outside of the water purifier body. The water discharge module includes a case from which the water discharge nozzle extends at a lower end of the case. A protection cap is detachably coupled to the lower end of the case to cover at least a portion of the water discharge nozzle extending outside of the case.