Full-effective reverse osmosis membrane element and water purification machine

A full-effective reverse osmosis membrane element, comprising a central tube and a reverse osmosis membrane folded in half to be wound around the central tube a raw water flow channel being formed between front surfaces of the reverse osmosis membrane folded in half, two opposite edges, adjacent to the central tube, of the reverse osmosis membrane folded in half being respectively sealed by a first water division band and a second water division band, a first end of the first water division band and a first end of the central tube being spaced from each other and forming a first concentrated water-outlet, a second end of the first water division band and an end, away from the central tube, of the reverse osmosis membrane being spaced from each other and forming a second concentrated water-outlet, a first end of the second water division band and the end, away from the central tube, of the reverse osmosis membrane being spaced from each other and forming a first raw water-inlet;

• and a second end of the second water division band and a second end of the central tube being spaced from each other and forming a second raw water-inlet.

A reverse osmosis membrane assembly, being characterized in that two opposite edges, adjacent to a central tube, of a reverse osmosis membrane folded in half are respectively sealed by a first water division band and a second water division band, a first end of the first water division band and a first end of the central tube are spaced from each other and form a first concentrated water-outlet, a second end of the first water division band and an end, away from the central tube, of the reverse osmosis membrane are spaced from each other and form a second concentrated water-outlet, a first end of the second water division band and the end, away from the central tube, of the reverse osmosis membrane are spaced from each other and form a first raw water-inlet, and a second end of the second water division band and a second end of the central tube are spaced from each other and form a second raw water-inlet.