| 摘要 |
This invention is used in water purification units. The spiral element of the filter consists of the top and bottom covers; the spring made of rust resistant steel - the filtering part - is mounted between them. The distance between the coils of the spring is 0.010-0.5 mm. In the upper part of the spring, there are risings, which are distributed with a distance of 10-15 mm between each other. The vertical cut of risings comes in the shape of a triangle, rectangle, square, trapezium or sphere. The filtering part can also consist of two cylindrical springs of rust-resistant steel, one placed into the other. |
