RO membrane central tube, RO membrane filter core and water purification machine

Abstract

The invention provides an RO membrane central tube. The RO membrane central tube comprises a central tube, the central tube is sleeved by a separation layer, the separation layer cooperates with the outer wall of the central tube so that a sealedly separated pure water through hole and concentrated water through hole are formed, the pure water through hole is used for communication with a pure water passage of a RO membrane, the concentrated water through hole is used for communication with a concentrated water passage of the RO membrane, the central tube is provided with sealedly separated first and second water communication cavities, the first water communication cavity has a first water outlet, the second water communication cavity has a second water outlet, the side wall of the central tube is provided with a first water communication hole communicated with the first water communication cavity and a second water communication hole communicated with the second water communication cavity, one of the first and second water communication holes is communicated with the pure water through hole and the other one of the first and second water communication holes is communicated with the concentrated water through hole. The RO membrane central tube increases the length of a water flow path of the reverse osmosis membrane and improves the water use efficiency. The invention also provides an RO membrane filter core with the RO membrane central tube, and a water purification machine with the RO membrane filter core.

Description

technical field [0001] The present invention relates to the technical field of water purification treatment, more specifically, to an RO membrane central tube and an RO membrane filter element, and also relates to a pure water machine with the above RO membrane filter element. Background technique [0002] The existing RO (abbreviation for Reverse Osmosis, reverse osmosis) membrane filter element includes a central tube and a membrane wound on the central tube, a pure water channel is arranged in the membrane, and a concentrated water channel is formed between adjacent membranes; the center The inside of the tube is provided with a pure water concentrated flow channel and a plurality of pure water through holes connecting the pure water channel and the pure water concentrated flow channel. The pure water through holes are distributed along the axial direction of the central tube at intervals. The pure water channel enters the pure water concentrated flow channel through the ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing reverse osmosis membrane filter elements all enter raw water from one end along the axial direction, and output concentrated water from the other end. The water flow channel is only the axial distance from the water inlet end to the concentrated water end. The water flow channel is short and the water utilization rate is low.

[0004] In addition, the water inlet and concentrated water ends of the reverse osmosis membrane filter element are separated by a sealing water ring. With the extension of time and pressure fluctuations, the water sealing ring is more likely to have crossover, causing the inlet water and concentrated water to collude, which in turn causes Pollutants on the surface of the membrane cannot be cleaned and clogged the RO membrane, reducing or losing the performance of the membrane

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