A water purifier with stable outlet water quality and its application method

Abstract

The invention provides a water purifier realizing stable water quality through a replacer. The water purifier comprises a pretreatment filter core 1 and a main filter core 2 which are successively arranged, a water inlet solenoid valve 4 and a booster pump 3 are arranged between a water-producing end of the pretreatment filter core and a water inlet end of the main filter core, a clean-water pipe is provided with a clean-water valve 6, and a dense-water pipe is provided with a dense-water adjusting device 14; the clean-water end of the main filter core is connected with the water-producing end of the pretreatment filter core through a water-returning bypath 10, and the water-returning bypath is provided with a water-returning solenoid valve 5; and the water purifier also comprises the replacer 8, the water outlet of the replacer 8 is connected with the clean-water end of the main filter core 2, a pressure switch 11 is arranged between the water outlet of the replacer 8 and the water-returning bypath 10, and the pressure switch 11 is controlled by pressure variation of a pipe at which the pressure switch 11 is disposed. The water purifier is capable of automatically replacing dense water in the main filter core in the standby process, the TDS concentration at the front and rear of a membrane of the main filter core is basically same, and the water quality is guaranteed to be stable.

Description

【Technical field】 [0001] The invention relates to domestic water treatment technology, and is especially suitable for the solution of "first glass of water" of reverse osmosis or nanofiltration water purifiers. 【Background technique】 [0002] Reverse osmosis or nanofiltration water purifier is a commonly used water purifier. Its principle is that the raw water with pressure passes through the reverse osmosis / nanofiltration membrane filter element, and the water molecules will pass through the reverse osmosis / nanofiltration membrane under the pressure drive. Inorganic salt ions, bacteria, viruses, organic matter and colloids are intercepted by the reverse osmosis / nanofiltration membrane on the concentrated water side, and discharged through the concentrated water pipeline, so as to realize the purification of raw water and obtain relatively pure drinking water. [0003] After the water purifier is out of service for a period of time, part of the inorganic salt ions and small ...

AI Technical Summary

Problems solved by technology

This method can alleviate the problem of "first glass of water" to some extent, but the effect is not obvious

However, this cannot fundamentally solve the problem of "first glass of water", and the water storage tank will also cause secondary problems such as secondary pollution and stale water quality.

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