Water purifier capable of preventing TDS value from increasing

Abstract

The invention discloses a water purifier capable of preventing a TDS value from increasing. The water purifier comprises a raw water inlet, a first RO (Reverse Osmosis) filter element and a second ROfilter element, wherein the raw water inlet is connected with a water inlet of a supercharging pump, a water outlet of the supercharging pump is divided into two paths, one path is connected with a water inlet end of the first RO filter element through a first water inlet electromagnetic valve, and the other path is connected with a water inlet end of the second RO filter element through a secondwater inlet electromagnetic valve; and a purified water end of the second RO filter element is connected to a water inlet end of the first RO filter element and is located between the first water inlet electromagnetic valve and the first RO filter element. The water purifier further comprises a control module, wherein the control module is used for adjusting the operating voltage of the supercharging pump to be matched with the capacity of the second RO filter element. According to the water purifier, the second RO filter element with a small capacity is additionally arranged on the basis of the traditional high-pass water purifier, and purified water generated by the second RO filter element is used for replacing concentrated water in the first RO filter element, so that the problem of ion diffusion is solved, and the TDS of purified water in a purified water end cannot increase.

Description

technical field [0001] The invention belongs to the technical field of water purifying equipment, in particular to a water purifying machine which prevents the TDS value from rising. Background technique [0002] The traditional reverse osmosis water purifier, the water production capacity is usually 50 gallons per day, the water production capacity ranges from 400 gallons to 800 gallons, or even more than 1,000 gallons, which are generally called large-flux water purifiers. Large-flux water purifiers are improving At the same time as certain performance, it also brings new problems in terms of hygiene indicators and cost performance, resulting in the problem of "living in water". [0003] At present, the flow channel of the reverse osmosis membrane filter element (RO filter element) is as follows: the raw water enters from one end of the filter element, the raw water is filtered from the outside to the inside, the filtered pure water goes out through the central tube, and t...

AI Technical Summary

Problems solved by technology

If it diffuses overnight, the TDS value of the pure water in the pure water side will increase significantly. If there are more heavy metal ions in the raw water, the heavy metals in the pure water will also exceed the standard, and the water quality and taste will be greatly affected.

[0004] When the high-throughput water purifier is working, the TDS at the pure water end is in a normal state. When the user stops using it, the concentrated water at the water inlet end of the RO membrane will gradually diffuse to the pure water end, and the diffusion time will start to appear after more than 5 minutes. The water at the pure water end generally depends on the size of the membrane shell, usually about 500-1000ml, which leads to a high TDS value of the first glass of water after restarting work

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