Spiral Wound Reverse Osmosis Membrane Element and Water Purifier with Spiral Wound Reverse Osmosis Membrane Element

A spiral wound reverse osmosis membrane element, comprising:

• a central tube, a first reverse osmosis membrane sheet, and a second reverse osmosis membrane sheet, wherein the first reverse osmosis membrane sheet is bent to form a first long leaf, a first folded edge and a first short leaf that are sequentially connected, a length of the first long leaf is greater than a length of the first short leaf, the second reverse osmosis membrane sheet is bent to form a second long leaf, a second folded edge and a second short leaf that are sequentially connected, a length of the second long leaf is greater than a length of the second short leaf, the first short leaf and the second short leaf are disposed oppositely, and the first reverse osmosis membrane sheet and the second reverse osmosis membrane sheet are stacked into a whole and then wound around the central tube;
• and a first raw water channel is formed between a part of the first long leaf and the first short leaf that are disposed oppositely, a second raw water channel is formed between a part of the second long leaf and the second short leaf that are disposed oppositely, a third raw water channel is formed between a part of the first long leaf extending beyond the first short leaf and a part of the second long leaf extending beyond the second short leaf that are disposed oppositely, the first raw water channel and the second raw water channel are in communication with a raw water nozzle so as to feed raw water, water in the first raw water channel and water in the second raw water channel separately flow to the third raw water channel, and a sum of cross-sectional circulation areas of the first raw water channel and the second raw water channel is greater than a cross-sectional circulation area of the third raw water channel.