A reverse osmosis composite filter element assembly

Abstract

The invention discloses a reverse osmosis composite filter element assembly, comprising an installation head, a casing and a reverse osmosis filter element. The installation head is located at the end of the casing, and a raw water aqueduct layer and a pure water aqueduct layer communicated with a central pipe are formed in the reverse osmosis membrane. Passing along the axial direction of the reverse osmosis filter element, the pure water outlet of the filter element assembly is located on the installation head, one of the raw water inlet or the concentrated water outlet is located on the installation head, and the other of the raw water inlet or the concentrated water outlet is located on the installation head. It is located on the shell and communicates with the end of the reverse osmosis filter element away from the installation head. A rear purification unit is arranged between the reverse osmosis filter element and the installation head. The rear purification unit includes a cylinder and a filter material located in the cylinder. The central pipe passes through the rear purification unit. In communication with the pure water outlet, there is a first flow channel outside the cylinder, and one of the raw water inlet or the concentrated water outlet communicates with the end of the reverse osmosis filter element near the installation head through the first flow channel. The invention reduces the number of filter elements in the water purifier, and simplifies the pipeline layout 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, the installation head is located at the end of the casing, the reverse osmosis filter element includes a central tube and a reverse osmosis membrane wound on the central tube, and the reverse osmosis membrane is formed inside The raw water aquifer layer and the pure water aquifer layer communicated with the center pipe, the water flow passes along the axial direction of the reverse osmosis filter element, and it is characterized in that it includes: a raw water inlet, a pure water outlet and a concentrated water outlet. The pure water outlet is located on the installation head, the raw water inlet is located on the installation head, the concentrated water outlet is located on the shell and communicates with the end of the reverse osmosis filter element away from the installation head; the rear purification unit is located between the reverse osmosis filter element and Between the installation heads, the post-purification unit includes a cylinder and a filter material located in the cylinder, and the central pipe communicates with the pure water outlet through the post-purification unit; the post-purification space is located between the reverse osmosis filter element and the installation Between the heads, the post-purification unit is located in the post-purification space, and the post-purification space is isolated from the end of the reverse osmosis filter element away from the installation head; the first flow channel is located between the inner wall of the shell and the cylinder, and the The raw water inlet communicates with the end of the reverse osmosis filter element close to the installation head through the first flow channel. The first flow channel has a large water passing area; the water flow enters the raw water aquifer from the end of the reverse osmosis filter element close to the installation head, and the water changes from the axial flow for radial flow

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