Water-saving water purifying system and control method thereof

Abstract

The invention provides a water-saving water purifying system and a control method thereof. The water-saving water purifying system comprises a water purifying branch, a coarse filtering branch, a flushing return pipeline and the like. Tap water flows through a first tee joint and a low-pressure switch to enter a first-stage filter element, a second-stage filter element and a third-stage filter element, the coarse filtering branch is led out between the third-stage filter element and a water inlet valve and can be used for domestic water, and pure water which can be directly drunk by people flows out of a rear-mounted filter element. A branch is connected in parallel with a fine filter element and is sequentially communicated with a second flow meter, a flushing electromagnetic valve, a proportional valve and a concentrated water tank, and wastewater flowing out of the concentrated water tank can be used. According to the invention, the filtering effect can be improved, the frequent replacement of the filter elements is reduced, a flushing loop can backwash a reverse osmosis film filter element under the condition of ensuring that the pure water is drunk by the people by controllinga water production loop and the flushing loop, the pollution of impurities in the filter elements is reduced, and the service life of the filter elements is prolonged. And water passing through the water-saving water purifying system can be used in different demand scenes, so that the waste of water resources is reduced.

Description

technical field [0001] The invention belongs to the technical field of water purification, and in particular relates to a water-saving water purification system and a control method thereof. Background technique [0002] At present, due to the improvement of people's living standards, the requirements for water quality are becoming more and more stringent. After the pure water was produced by the previous water purification system, the waste water was directly discharged through the sewer, so that the water resources could not be used rationally and the water resources were seriously wasted. The existing water purification system uses a reverse osmosis filter element. With the increase of water production, when there are more impurities remaining on the surface of the reverse osmosis filter element, there will be a certain barrier to the filter element, and the water purification effect will also be reduced. Frequent replacement of the filter element will lead to The cost i...

AI Technical Summary

Problems solved by technology

After the previous water purification system produced pure water, the waste water was directly discharged through the sewer, which made the water resources not be used rationally, and the water resources were seriously wasted.

The existing water purification system uses a reverse osmosis filter element. With the increase of water production, when there are more impurities remaining on the surface of the reverse osmosis filter element, there will be a certain barrier to the filter element, and the water purification effect will also be reduced. Frequent replacement of the filter element will lead to high cost

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