Dual-membrane long-acting water making system

Abstract

The invention relates to a dual-membrane long-acting water making system, which comprises a water making pipeline, wherein a water inlet solenoid valve I, a low pressure switch, a booster pump, an RO (Reverse Osmosis) membrane filter element, a one-way valve I, a high pressure switch, a pressure tank and a rear filter device are sequentially arranged between a raw water inlet and a pure water inlet of the water making pipeline, and a pipeline connected with an ultrafiltration membrane filter element is arranged between the raw water inlet and the water inlet solenoid valve I; a water inlet solenoid valve II and a one-way valve II are arranged between the raw water inlet and the ultrafiltration membrane filter element, and a wastewater port of the ultrafiltration membrane filter element is connected with a wastewater discharge pipeline; a discharge solenoid valve is arranged on the wastewater discharge pipeline, and a branch path I communicated with a purified port of the ultrafiltration membrane filter element is arranged between the water inlet solenoid valve I and the low pressure switch; a water inlet solenoid valve III is arranged on the branch path I, and a concentrated water outlet of the RO membrane filter element is connected with a branch path II and a branch path III; the branch path II is communicated with the branch path I, and a combination solenoid valve and a one-way valve III are arranged on the branch path II; a waste water ratio part II is arranged on the branch path III. The water making system comprises a water making mode and a washing mode, and the service life of the filter element is prolonged.

Description

technical field [0001] The invention relates to a water production device, in particular to a double-membrane long-term water production system. Background technique [0002] At present, reverse osmosis water purifiers have been favored by consumers due to their remarkable purification effect, but most of the water purifiers do not have the function of flushing the filter element. During use, impurities in the water will quickly adhere to the filter element and cause the filter element to block. Shorten the life of the filter element, and at the same time reduce the water production rate or affect the water quality. Moreover, due to the gradual seriousness of water pollution and the differences in water quality in various regions, the filter element needs to be replaced every 2-3 months in places with poor water quality, even in places with better water quality. The time also needs to replace the filter element, and the frequent replacement of the filter element greatly incr...

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