Water purifying and dispensing machine and water purifying method capable of avoiding TDS standard exceeding of water storage tank thereof

Abstract

The invention provides a water purifying method capable of avoiding TDS standard exceeding of a water storage tank of a water purifying and dispensing machine. The water purifying method includes steps: after a water making system of the water purifying and dispensing machine stops running, opening a concentrated water outlet of an RO membrane, and guiding pure water into the RO membrane; stopping guiding the pure water in after concentrated water in the RO membrane is replaced. After the water purifying and dispensing machine stops making water, the concentrated water outlet of the RO membrane is opened, and the pure water is guided into the RO membrane and utilized to replace the concentrated water in the RO membrane to enable the RO membrane to be surrounded by the pure water. In this way, low-TDS pure water is at a concentrated water end of the RO membrane, and increase of TDS at a pure water end of the RO membrane can be avoided, so that TDS value of the water storage tank of the water purifying and dispensing machine can be avoided exceeding standards, probability of scaling on the surface of the RO membrane during machine halt is lowered, water making efficiency is improved, and service life of the RO membrane is prolonged. The invention further provides the water purifying and dispensing membrane.

Description

technical field [0001] The invention relates to the technical field of water quality purification treatment, and more specifically, relates to a water purification method for preventing the TDS of a water storage tank of a water purification machine from exceeding the standard. The invention also relates to a water purification machine. Background technique [0002] Currently on the market, the RO (abbreviation for Reverse Osmosis, reverse osmosis) membrane water purification machine, its pure water outlet is directly connected to the water storage tank; in this way, when the water system is shut down, the principle of permeation and diffusion of the RO membrane will Make the ions from the concentrated water end permeate and diffuse to the pure water end until the TDS (abbreviation for Total dissolved solids, total dissolved solids) at the pure water end reaches a relative balance with the TDS at the concentrated water end. The pure water produced after starting up will be p...

AI Technical Summary

Problems solved by technology

[0002] Currently on the market, the RO (abbreviation for Reverse Osmosis, reverse osmosis) membrane water purification machine, its pure water outlet is directly connected to the water storage tank; in this way, when the water system is shut down, the principle of permeation and diffusion of the RO membrane will Make the ions from the concentrated water end permeate and diffuse to the pure water end until the TDS (abbreviation for Total dissolved solids, total dissolved solids) at the pure water end reaches a relative balance with the TDS at the concentrated water end. The pure water produced after starting up will be pushed into the water storage tank, and this part of the ions will drive the TDS value of the entire water storage tank to increase, resulting in a higher TDS value of the pure water in the water storage tank than the TDS of the pure water end of the RO membrane during water production, resulting in The TDS value of the water storage tank of the drinking machine exceeds the standard

[0003] In addition, when the drinking machine is shut down, the concentrated water side of the RO membrane is immersed in the concentrated water, and various minerals, colloids, organic matter, bacteria, etc. blocked by the RO membrane have accumulated on the concentrated water side, and the concentrated water is alkaline, so It is easier to scale on the concentrated water side of the RO membrane, which accumulates over time, and even forms hard scale that is extremely difficult to clean, which not only affects the water production efficiency, but also shortens the life of the RO membrane

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