A waste water ratio device

Abstract

A waste water ratio device, characterized in that: the waste water ratio device includes a valve sleeve, and the valve sleeve is provided with a raw water port, a concentrated water port, a water production port and a drain port; the valve core is axially slidable and arranged on the In the valve sleeve, the raw water port, the concentrated water port and the produced water port are isolated from each other and not connected to each other, and the drain port is respectively isolated from the raw water port and the produced water port. The valve core can control the opening size of the drain port; elastic components; both sides of the valve core The sustained pressure always satisfies the following dynamic balance relationship: Fy+Fn=Fc+Ft. The advantages of the present invention are: the automatic adjustment of the waste water ratio is realized by using pure water pressure control, the control is more stable and reliable, the cleaning of the waste water ratio can be realized in the process of the valve core moving back and forth, the overall structure is simple and easy to implement; according to the change of the raw water channel Adjust the membrane front pressure of the filter device in time to prevent damage to the filter membrane caused by unstable raw water pressure.

Description

technical field [0001] The invention relates to a reverse osmosis water purification device, in particular to a waste water ratio device used in a water purifier or a pure water machine. Background technique [0002] Most of the water purifiers or pure water machines on the market rely on reverse osmosis membranes to purify tap water. After the tap water is compressed and passed through the reverse osmosis membrane, it becomes two parts: clean water and concentrated water. The ratio of clean water to concentrated water is the waste water ratio. . [0003] At present, the industry mainly controls the wastewater ratio by setting a fixed-ratio solenoid valve on the wastewater branch road. For example, the existing patent number is 201820082279.6 "An RO Machine for Automatically Adjusting the Wastewater Ratio" which discloses a RO machine that automatically adjusts the wastewater ratio. , The RO filter element has two water outlets, one end is the pure water end connected to th...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned prior art has the following problems: First, in the prior art, TDS sensors or electromagnetic valves are mainly used to detect changes in water pressure and water quality, and only paying attention to the TDS value often ignores the flow rate, which may easily cause inaccurate flow rates. Stable, and the reliability of the solenoid valve detection method is poor, often causing pipeline problems due to power failure; secondly, the existing waste water is more likely to cause blockage than the drain, and it is necessary to set up a needle or flush solenoid valve to unblock, and the structure is more complicated , the dredging effect is limited; moreover, the existing wastewater ratio devices are all installed after the filtration system, which cannot sense the pressure in front of the membrane, and the change of the raw water pressure will affect the pressure of the pump water, which is likely to cause damage to the filtration membrane; in addition, Existing fixed wastewater ratio, too little selectivity, insufficient flushing in places with poor water quality, waste of flushing water in places with good water quality

[0005] To sum up, the current wastewater ratio device has disadvantages such as easy clogging and unstable performance, and further improvement is still needed.

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