Multi-membrane reverse osmosis water-purifying system and water purifier

Abstract

The invention discloses a multi-membrane reverse osmosis water-purifying system and a water purifier. Water is purified through the multi-membrane reverse osmosis water-purifying system; the water purifying system is provided with multiple stages of membrane filtration units, concentrated water of a previous-stage membrane filtration unit is discharged into a water inlet of a next-stage membrane filtration unit to be used as inlet water of the next-stage membrane filtration unit, and concentrated water generated by the previous multiple stages of membrane filtration units is intensively treated by a last stage of membrane filtration unit. According to the water purifier, raw water is subjected to multi-stage filtration through the multiple stages of membrane filtration units, the ratio ofpure water to waste water in produced water is improved, and user experience is improved; the concentrated water generated by all the membrane filtration units is treated by the last stage of membranefiltration unit, the flow of the concentrated water after convergence is increased, and the flow velocity of the concentrated water on the surface of a filter membrane of the last-stage membrane filtration unit is higher, so that the scaling risk of a filter element is reduced, the service life of the filter element is prolonged; and the water purifying system can maintain the overall large-flowuse experience of the water purifier only by replacing a last-stage filter element, and the replacement cost of the filter element is reduced.

Description

technical field [0001] The invention relates to the technical field of water purifiers, in particular to a multi-membrane reverse osmosis water purification system and a water purifier. Background technique [0002] At present, more and more water purifiers on the market adopt the barrelless design. Compared with the water purifiers with barrels, the barrelless designed water purifiers are more portable, occupy less space and are easy to install. However, the water purifier with no barrel design needs a large amount of pure water production per unit time to meet people's drinking water needs. The size of the filter element of the reverse osmosis membrane of the water purifier with large flux (usually above 100G) is usually also very large, and the replacement cost when the filter element is replaced as a whole is high. [0003] Although the large flux water purifiers on the market have increased flux, most of them still use single-core reverse osmosis filters. When the fil...

AI Technical Summary

Problems solved by technology

When the filter element is polluted or its service life expires, the filter element needs to be replaced as a whole. Correspondingly, the higher the flux, the higher the replacement cost of the filter element.

For example, for a water purifier with a flux of 400G, the replacement cost of the filter element is about 600 yuan or more. high replacement cost

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