Reverse osmosis water purifier

Abstract

The invention relates to a domestic water purifier and discloses a reverse osmosis water purifier. The reverse osmosis water purifier comprises a reverse osmosis film filter element (1), the reverse osmosis film filter element (1) is connected with a raw water inlet pipe (11), a concentrated water outlet pipe (12) and a purified water outlet pipe (13), a pressure tank (2) is connected to the purified water outlet pipe (13) through a water storage pipe (21), and the pressure tank (2) is connected with a raw water inlet of the reverse osmosis film filter element (1) through a return pipe (23). Due to the facts that the pressure tan (2) for storing purified water is arranged in the reverse osmosis water purifier and concentrated water on the surface of a film is flushed through the purified water in the pressure tank (2), no osmotic pressure exists in a reverse osmosis film shell, the salt removing rate is high, and the TDS value of the purified water in the reverse osmosis film is effectively lowered.

Description

technical field [0001] The invention relates to a household water purifier, in particular to a reverse osmosis water purifier. Background technique [0002] Household water treatment products are becoming more and more popular, greatly improving people's quality of life. [0003] In this series of products, the core treatment technology is a unit called reverse osmosis membrane, which performs ultimate purification of source water to meet the purpose of filtering out various impurities in water. [0004] In this series of products, the general treatment process of large-flow reverse osmosis water purifiers is as follows - "water inlet ball valve, pre-filter, water inlet solenoid valve, booster pump, reverse osmosis membrane, check valve, Combination solenoid valve with waste water ratio, high pressure switch, water outlet tap, etc. [0005] The water purifier is generally in a fully automatic working state. The water purifier is directly connected to the tap water pipelin...

AI Technical Summary

Problems solved by technology

[0007] In particular, the problem of the large-flow barrelless reverse osmosis water purifier is that when it is shut down for a long time or not in use, it will have the disadvantage of low desalination rate when it is turned on again. The specific reason is that when the water purifier is shut down, the water inlet solenoid valve is closed, the booster pump stops working, and some pure water and waste water remain in the reverse osmosis membrane shell. Under the condition of no external pressure, due to the osmotic pressure between concentrated water and pure water in the reverse osmosis membrane shell, There will be a process of two-way osmosis, that is, pure water seeps to the concentrated water side, and concentrated water seeps to the pure water side

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