Filter element and water purifier comprising same

Abstract

The invention discloses a filter element and a water purifier comprising the filter element. The filter element comprises a central pipe assembly and a filter membrane assembly, wherein the central tube assembly comprises a raw water pipe and a produced water pipe, wherein a raw water outlet is formed in the raw water pipe, and a purified water inlet is formed in the produced water pipe; the filter membrane assembly comprises a membrane bag, a purified water flow passage is formed inside the membrane bag, an inlet is formed in the membrane bag, the inlet is communicated with the purified waterinlet in the produced water pipe, the membrane bag is wound on the central pipe assembly, a plurality of winding layers are formed in the radial direction of the central pipe assembly, and the adjacent winding layers are communicated with the raw water outlet. According to the filter element provided by the invention, raw water flows into the membrane bag to form purified water, and the purifiedwater flows inside the membrane bag and flows into the produced water pipe. The purified water, raw water and concentrated water are separated through the membrane bag, the purified water is formed inside the membrane bag, the raw water and the concentrated water circulate outside the membrane bag, the concentrated water is beneficial for flowing out, the pollution rate of the filter element is reduced, and the service life of the reverse osmosis membrane filter element is prolonged.

Description

technical field [0001] The invention relates to the technical field of water purification, in particular to a filter element and a water purifier including the same. Background technique [0002] The principle of existing reverse osmosis membrane filter water filtration is that the direction of raw water inlet and concentrated water outflow is parallel to the center pipe, and the direction of product water outflow is perpendicular to the center pipe. By sealing the three sides of the membrane bag away from the center pipe, it is realized. Separation of raw water, concentrated water and pure water. The filter element of this structure has the following problems: (1) The raw water is filtered into pure water under pressure, and part of the raw water is discharged as waste water. With the operation of time, a concentration polarization layer is formed on the membrane surface of the raw water side, resulting in rapid performance of the filter element. decline. (2) The raw wate...

AI Technical Summary

Problems solved by technology

The filter element of this structure has the following problems: (1) The raw water is filtered into pure water under pressure, and part of the raw water is discharged as waste water. With the operation of time, a concentration polarization layer is formed on the membrane surface of the raw water side, resulting in rapid performance of the filter element. decline

(2) The raw water flow channel is long, and there is a transition area in the raw water flow channel from the inlet to the outlet, and there is an area with extremely low water flow velocity. In this area, the concentration difference polarization of the membrane surface is serious, and the water production rate is extremely low

(3) The internal pressure of the reverse osmosis membrane is unstable, the desalination rate is low, the utilization rate of the membrane is unbalanced, and the flux is unstable

(4) The concentration polarization at the end of the reverse osmosis filter element is serious, and the performance of the filter element is seriously affected

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