Reverse osmosis water purification system, reverse osmosis water purifier and control method

Abstract

The invention discloses a reverse osmosis water purification system, a reverse osmosis water purifier and a control method. The reverse osmosis water purification system comprises a pretreatment unit as well as a water hardness sensor, a reverse osmosis treatment unit and an electric control system, wherein the water hardness sensor is arranged in front of the pretreatment unit and is used for detecting the water hardness of raw water; the reverse osmosis treatment unit is arranged behind the pretreatment unit and comprises a reverse osmosis membrane filtering device and a washing unit; the reverse osmosis membrane filtering device is used for purifying water treated by the pretreatment unit; the washing unit is used for washing the reverse osmosis membrane filtering device; the electric control system is used for adjusting the washing degree of the reverse osmosis treatment unit according to the water hardness detected by the water hardness sensor. By adopting the reverse osmosis water purification system disclosed by the invention, the washing degree can be adjusted according to the water hardness of the raw water, and the caking pollution of the reverse osmosis membrane filtering device can be prevented.

Description

technical field [0001] The invention relates to the field of water purifiers, in particular to a reverse osmosis water purification system, a reverse osmosis water purifier and a control method. Background technique [0002] Existing reverse osmosis water purifiers generally include a pre-treatment filter device, a water pump and a reverse osmosis membrane filter device, and the raw water entering the reverse osmosis water purifier is divided into purified water and concentrated water after being filtered by the reverse osmosis membrane filter device. The purified water produced by the reverse osmosis water purifier can meet the water quality standard stipulated by the Ministry of Health and can be directly drunk, but the concentrated water produced by the reverse osmosis water purifier is often directly discharged when it is used. At present, the ratio of purified water to wastewater that can be achieved by the reverse osmosis water purifier system is 1:3, that is, to produ...

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Problems solved by technology

[0003] However, the existing water-saving methods generally adopt concentrated water backflow, multi-membrane cascading, and reducing the wastewater ratio. If these methods do not consider regional water quality differences and real-time water quality conditions, they will cause fouling of the reverse osmosis membrane filtration device. and fouling, resulting in a reduction in the life of the reverse osmosis membrane filtration device and an increase in the cost of using the water purifier

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