Water-saving reverse osmosis (RO) machine

[0032] (Example 1)

[0033] see figure 1 , The water-saving RO machine of this embodiment includes a water inlet 1, a pretreatment filter element 2, a booster pump 3, a small flow throttle valve 4, a reverse osmosis processor 5, a return pipe 6, a large flow throttle valve 7, Pure water outlet 8 and control circuit board.

[0034] The inlet of the pretreatment filter element 2 is connected to the water inlet 1, and the outlet thereof is connected to the inlet of the reverse osmosis processor 5. The booster pump 3 is arranged on the inlet pipeline of the reverse osmosis treatment 5 device. The pure water outlet of the reverse osmosis processor 5 is connected to the pure water outlet 8. One end of the return pipe 6 is connected to the concentrated water outlet of the reverse osmosis processor 5, and the other end is connected to the inlet of the pretreatment filter element 2. The large flow throttle valve 7 is arranged on the return pipe 6. The pipeline through which the concentrate

[0041] (Example 2)

[0042] see figure 2 This embodiment is basically the same as embodiment 1, except that it also includes a water circulation device 9 and a water inlet valve 10.

[0043] The water circulation device 9 is arranged on the pipeline from the port of the return pipe 6 close to the end of the pretreatment filter element 2 to the inlet of the pretreatment filter element 2. The water activator 9 is an electromagnetic field processor or a magnetic field processor, and the direction of water flow inside it is perpendicular to the propagation direction of electromagnetic waves or the direction of magnetic field lines of the magnetic field. The water inlet valve 10 is arranged on the pipeline between the water inlet 1 and the port of the return pipe 6 close to the end of the pretreatment filter element 2 or on the pipeline between the outlet of the pretreatment filter element 2 and the inlet of the reverse osmosis processor 5.