Double-membrane recycling water filtering and purifying system and water purifier

Abstract

The invention relates to a double-membrane recycling water filtering and purifying system and a water purifier. The water purifier is used for desalting and purifying water through the double-membranerecycling water filtering and purifying system. The water filtering and purifying system is provided with a first filtering unit, a second filtering unit and a tangential valve; the water inlet of the first filtering unit is communicated with a raw water pipeline; the pure water outlet of the first filtering unit is communicated with a pure water pipeline, concentrated water of the first filtering unit is used as raw water of the second filtering unit, the concentrated water outlet of the second filtering unit is communicated with a concentrated water pipeline, and the tangential valve is assembled at the communication position between the pure water outlet of the second filtering unit and the pure water pipeline. Raw water is subjected to multiple filtration by a reverse osmosis membraneand a nano filtration membrane; a three-way tangential valve is arranged at the water outlet of the second filtering unit to control the pure water flow direction of the second filtering unit, so that multi-water-quality water production and water recycling are realized, the water production flow rate of the water filtering and purifying system is favorably increased, the service life of the water purifier is favorably prolonged, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of water purifiers, in particular to a double-membrane reuse water filtration and purification system and a water purifier. Background technique [0002] Most reverse osmosis water purifiers use reverse osmosis filter elements for water purification operations, and the reverse osmosis filter elements have reverse osmosis membranes. When the raw water enters the reverse osmosis water purifier, a certain pressure is applied to the water to make the water molecules and ionic mineral elements in the raw water pass through the reverse osmosis membrane, while the macromolecular inorganic salts in the tap water include heavy metal ions, organic matter, bacteria and Viruses cannot pass through the reverse osmosis membrane with small membrane pores to achieve water purification. Existing reverse osmosis membrane water purifiers can only produce a single water quality, that is, pure water for drinking and concentrate...

AI Technical Summary

Problems solved by technology

Existing reverse osmosis membrane water purifiers can only produce a single water quality, that is, pure water for drinking and concentrated water with high salt concentration, which cannot meet the needs of users for drinking water of multiple water quality, affect the user experience, and cannot Make full use of water

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