A reverse osmosis composite filter element assembly

Abstract

The invention discloses a reverse osmosis composite filter element assembly, which comprises a mounting head, a casing and a reverse osmosis filter element located in the casing. There is a first water passing gap between the reverse osmosis filter element and the casing. There are raw water inlet, pure water outlet and concentrated water outlet on the top. The reverse osmosis filter element includes a central tube and a reverse osmosis membrane wound on the central tube. The reverse osmosis membrane forms a raw water guide layer and a pure water guide layer. The pure water water guide layer communicates with the first flow channel in the center pipe, and the filter element assembly also includes: a post purification filter element, located between the end of the reverse osmosis filter element and the bottom wall of the shell, including the water inlet side and the water outlet side, the first flow channel It is connected to the pure water water guide layer and the water inlet side of the post-purification filter element; the second flow channel is connected to the water outlet side of the post-purification filter element and the pure water outlet. The invention reduces the number of filter elements in the water purifier and simplifies the layout of pipelines between the filter elements.

Description

technical field [0001] The invention relates to a reverse osmosis composite filter element assembly, which belongs 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. Existing reverse osmosis water purifiers generally have four stages of filtration, and each stage of filtration has a filter element. The first-stage PP cotton filter element mainly filters large particles of impurities; the second-stage pre-activated carbon filter element mainly absorbs impurities such as color and odor, colloid and residual chlorine, and protects the rear-end reverse osmosis filter element; the third-stage reverse osmosis filter element can Organic matter, colloid, bacteria, viruses and other impurities in raw water are filtered, especially for inorganic salts, heavy metal ions and other impurities with extremel...

AI Technical Summary

Problems solved by technology

[0003] Aiming at a series of problems caused by many filter elements in the reverse osmosis water purifier, such as large volume, complex pipeline layout between filter elements, complicated filter element life monitoring and reminder, and complicated filter element replacement, the present invention provides a reverse osmosis composite filter element assembly, It includes an installation head, a casing and a reverse osmosis filter element located in the casing. There is a first water gap between the reverse osmosis filter element and the casing. The installation head is located at the end of the casing, and a raw water inlet is provided on the installation head. , a pure water outlet and a concentrated water outlet, the reverse osmosis filter element includes a central tube and a reverse osmosis membrane wound on the central tube, a raw water guide layer and a pure water guide layer are formed in the reverse osmosis membrane, the The pure water water guide layer communicates with the first flow channel in the center pipe, and is characterized in that it includes: a post purification filter element, located between the end of the reverse osmosis filter element and the bottom wall of the shell, including the water inlet side and the water outlet side, the said The first flow channel connects the pure water water guide layer and the water inlet side of the post-purification filter element; the second flow channel connects the water outlet side of the post-purification filter element and the pure water outlet, and the second flow channel is located at the center of the reverse osmosis filter element ; Or, the reverse osmosis filter element is provided with an isolation cylinder, the first water gap is located between the reverse osmosis filter element and the isolation cylinder, and the second flow channel is located between the shell and the isolation cylinder

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