Reverse osmosis filter core and reverse osmosis filter core assembly

Abstract

The invention discloses a reverse osmosis filter core, the reverse osmosis filter core comprises a central tube and reverse osmosis membrane bags winding the central tube, pure water guiding layers are formed in the reverse osmosis membrane bags, a raw water guiding layer is formed between adjacent reverse osmosis membrane bags; one end of the reverse osmosis filter core is a water inlet end, theother end of the reverse osmosis filter core is a water outlet end, wherein the water cross area of the raw water guiding layer at the water inlet end of the reverse osmosis filter core is larger thanthe water cross area of the raw water guiding layer at the water outlet end of the reverse osmosis filter core. The reverse osmosis filter core helps to keep the flow velocity at both ends consistent, and avoids the problems that due to the slow flow velocity of the inner side of the water outlet end, concentration polarization is formed, pure water permeation flux is reduced to cause solutes such as inorganic salts and heavy metal ions to deposit on the surface of a reverse osmosis membrane to form scale so as to affect the service life of the reverse osmosis filter core. In addition, no significant pressure drop between the water outlet end and the water inlet end of the reverse osmosis filter core can be ensured, the water production efficiency of the part can be ensured, and both endsof the reverse osmosis filter core can be evenly used.

Description

technical field [0001] The invention relates to a reverse osmosis filter element and a reverse osmosis filter element assembly, belonging to the technical field of water treatment. Background technique [0002] With the improvement of people's requirements for drinking water quality, pure water systems are gradually entering the drinking water system of every household. The water purifiers currently on the market generally use reverse osmosis filters, which can filter organic matter, colloids, bacteria, viruses and other impurities in raw water, especially for inorganic salts, heavy metal ions and other impurities with extremely high filtration efficiency. Therefore, the reverse osmosis filter element constitutes the core component of the water purifier, and the filtering effect of the water purifier is directly related to the filtering effect of the reverse osmosis filter element. The reverse osmosis filter includes a central tube and a reverse osmosis membrane bag wound...

AI Technical Summary

Problems solved by technology

[0003] The flow rate of raw water gradually decreases along the axial direction, resulting in a decrease in the permeation flux of pure water, and even the deposition of solutes such as inorganic salts and heavy metal ions on the surface of the reverse osmosis membrane to form scaling, which affects the service life of the reverse osmosis filter element. In addition, reverse osmosis The pressure at the water outlet end of the filter element will drop significantly compared to the water inlet end, which not only affects the water production efficiency, but also causes a series of problems such as uneven usage at both ends of the reverse osmosis filter element. The invention provides a reverse osmosis filter element, including a central tube and The reverse osmosis membrane bag wound on the central tube, the pure water water guide layer is formed inside the reverse osmosis membrane bag, the raw water water guide layer is formed between the adjacent reverse osmosis membrane bags, and one end of the reverse osmosis filter element is the water inlet end , and the other end is the water outlet, and it is characterized in that, the water-passing area of ​​the raw water aquifer at the water inlet end of the reverse osmosis filter element is greater than the water-passing area of ​​the raw water aquifer layer at the water outlet end of the reverse osmosis filter element

Images