Flushing method of nanofiltration and reverse osmosis water purifier

Abstract

The invention discloses a nanofiltration and reverse osmosis water purifier which comprises a filter element assembly installed in a water purifier body, the filter element assembly is connected with a tap water inlet pipe, the tap water inlet pipe is connected with a water pump and a water inlet valve, one side of the filter element assembly is connected with a waste water outlet pipe, the waste water outlet pipe is connected with a waste water valve, the filter element assembly is also connected with a pure water outlet pipe, the pure water outlet pipe is connected with a flow meter and a pure water storage pipe, the pure water storage pipe is connected with a water storage tank, a piston is installed in the water storage tank, the top of the water storage tank is connected with a tap water injection pipe, and the tap water injection pipe is communicated with the tap water inlet pipe. According to the technology, the problem that the quality of the first cup of water is low after the domestic drinking water faucet is opened again is solved, the closed water storage tank mode is adopted, the piston is arranged in the water storage tank, pure water can be reversely injected into the filter element assembly for flushing by squeezing the piston through tap water, the pure water in the water storage tank cannot be polluted, the tap water pressure is higher, and the flushing effect is better.

Description

technical field [0001] The invention belongs to the technical field of water purifiers, and in particular relates to a washing method for nanofiltration and reverse osmosis water purifiers. Background technique [0002] Water purifiers, also called water purifiers and water purifiers, are water treatment equipment that perform deep filtration and purification of water quality according to the requirements for water use. The water purifier we usually talk about generally refers to small purifiers used for household use. In the prior art, when the water purifier is shut down, since the inside and outside of the nanofiltration membrane and the reverse osmosis membrane retain pure water and concentrated water respectively, due to the concentration difference between the pure water and concentrated water, there will be interpenetration between the inside and outside of the membrane, resulting in The TDS value of pure water becomes higher, which leads to the deterioration of the ...

AI Technical Summary

Problems solved by technology

In the prior art, when the water purifier is shut down, since the inside and outside of the nanofiltration membrane and the reverse osmosis membrane retain pure water and concentrated water respectively, due to the concentration difference between the pure water and concentrated water, there will be interpenetration between the inside and outside of the membrane, resulting in The TDS value of pure water becomes higher, which leads to the deterioration of the quality of the first glass of drinking water after the drinking water is opened again. Some water purifiers use water storage tanks to store pure water and rinse the membrane after the water purifier is shut down, but most of them A non-enclosed water storage tank is used, and the pure water in the water storage tank is injected into the filter element by using atmospheric pressure. In this way, the contact between the pure water and the air will inevitably cause the pure water in the water storage tank to be polluted, thus making the flushing effect Poor, even risk of fouling nanofiltration and reverse osmosis membranes

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