Water purification machine system and control method for controlling system

Abstract

The invention provides a water purification machine system and a control method for controlling the system. The water purification machine system comprises a raw water opening, a first filter element, a pure water outlet and a concentrated water outlet, wherein raw water enters from the raw water opening and flows through the first filter element so as to be divided into pure water and concentrated water; and the pure water can be discharged from the pure water outlet; the concentrated water outlet can be discharged from the concentrated water outlet. The water purification machine system also comprises concentrated water backflow branches which are suitable for causing the concentrated water to flow back to the upper part of the first filter element. The water purification machine system has the beneficial effects that the alternate change of water quality states on a membrane surface of the filter element is realized by adopting an intermittent backflow water production mode; the effective washing of the membrane surface of the filter element is realized; the scaling risk is reduced; wastewater discharge is reduced; and the recovery rate of the system is improved.

Description

technical field [0001] The invention relates to the field of water purification, in particular to a water purifier system and a control method for controlling the system. Background technique [0002] The existing water purifier system has the phenomenon of low recovery rate and waste of water. Some water purifier systems reduce the discharge of concentrated water by reducing the wastewater ratio of the concentrated water branch, so as to achieve the purpose of improving the overall recovery rate of the system, but this method is likely to cause concentration polarization on the reverse osmosis membrane surface. Membrane surface is prone to fouling, reducing the service life of reverse osmosis membrane. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide a water purifier system and a control method for controlling the system. For example, the intermittent backflow water production mode is used to realize the alternate cha...

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Problems solved by technology

[0002] The existing water purifier system has low recovery rate and waste water

Some water purifier systems reduce the discharge of concentrated water by reducing the wastewater ratio of the concentrated water branch, so as to achieve the purpose of improving the overall recovery rate of the system, but this method is likely to cause concentration polarization on the reverse osmosis membrane surface. Membrane surface is easy to scale, reducing the service life of reverse osmosis membrane

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