CN217868391U

CN217868391U - Pure water backflow system of water purifier

Info

Publication number: CN217868391U
Application number: CN202222126538.XU
Authority: CN
Inventors: 张建芳; 刘扬龙; 张康宁; 张兴
Original assignee: Shenzhen Angel Drinking Water Equipment Co Ltd
Current assignee: Shenzhen Angel Drinking Water Equipment Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-11-22
Anticipated expiration: 2032-08-12

Abstract

A pure water reflux system of a water purifier comprises a water inlet electromagnetic valve, a temperature sensor, a first TDS probe, a booster pump, a reverse osmosis membrane filter element and a water outlet, wherein a water channel pipeline is connected to the reverse osmosis membrane filter element through the water inlet electromagnetic valve and is connected to the water outlet after passing through the reverse osmosis membrane filter element; a prepositive processing unit is arranged between the water inlet electromagnetic valve and the booster pump, a postpositive filter element is additionally arranged at the rear end of the reverse osmosis membrane filter element, and a pure water backflow bypass is parallelly arranged between the rear end of the postpositive filter element and the front end of the prepositive processing unit.

Description

Pure water backflow system of water purifier

[ technical field ] A

The utility model relates to a domestic water purification unit field especially relates to a system suitable for pure water backward flow in purifier.

[ background of the invention ]

With the improvement of living standard, the requirements of people on the quality of life are continuously improved, and household appliances are updated and improved continuously. The water purifier is one of the household electronic products which are more and more widely popularized in recent years, and can provide purified water for daily drinking.

The types of water purifiers are various, the conventional water purifier cannot meet the requirements of people, and the large-flux water purifier gradually appears in the visual field of people and is favored at present. However, as the flow rate increases, the volume of the RO membrane shell also increases, and after the water purifier is shut down, the concentrated water with high concentration can gradually permeate to the pure water end with low concentration due to osmosis. The first cup of water purifier play water can have higher salinity and obviously rise (that is to say that the common index TDS value of water purification becomes high), leads to quality of water to worsen, seriously influences user experience and feels.

[ summary of the invention ]

The utility model provides a system for let pure water backward flow in purifier in order to solve the too high problem of TDS value after shutting down, through the leading preprocessing unit of system configuration, let the pure water backward flow to solve the problem that the purifier is shut down and is reopened first cup of water TDS and be on the high side.

The utility model relates to a water purifier pure water backflow system comprises a water inlet electromagnetic valve, a temperature sensor, a first TDS probe, a booster pump, a reverse osmosis membrane filter element and a water outlet, wherein a water channel pipeline is connected to the reverse osmosis membrane filter element through the water inlet electromagnetic valve and is connected to the water outlet through the reverse osmosis membrane filter element, the booster pump is arranged at the water inlet end of the reverse osmosis membrane filter element, the temperature sensor and the first TDS probe are arranged between the water inlet electromagnetic valve and the booster pump, and the water purifier pure water backflow system is characterized in that a front-mounted processing unit, a rear-mounted filter element and a pure water backflow bypass are arranged in the system; a prepositive processing unit is arranged between the water inlet electromagnetic valve and the booster pump, a postpositive filter element is additionally arranged at the rear end of the reverse osmosis membrane filter element, and a pure water backflow bypass is parallelly arranged between the rear end of the postpositive filter element and the front end of the prepositive processing unit.

A second TDS probe is added between the pre-processing unit and the booster pump.

This pure water backward flow bypass includes third TDS probe, backward flow solenoid valve and a check valve, and the direction of backward flow is opposite with normal filtration water supply direction, and the pure water that comes out from rearmounted filter core loops through third TDS probe, backward flow solenoid valve and check valve, is connected to leading processing unit front end.

The system also comprises a pulse flushing unit, wherein the pulse flushing unit is directly connected to the concentrated water end of the reverse osmosis membrane filter element and comprises a solenoid valve combination and a fourth TDS probe, and the solenoid valve combination comprises an on-off solenoid valve and a wastewater ratio solenoid valve.

[ description of the drawings ]

FIG. 1 is a schematic view of a pure water recirculation system of a water purifier according to the present invention;

wherein: 10. a water inlet electromagnetic valve; 21. a first TDS probe; 22. a second TDS probe; 23. a third TDS probe; 24. a fourth TDS probe; 25. a temperature sensor; 30. a booster pump; 40. a reverse osmosis membrane filter element; 50. a water outlet; 60. a pre-processing unit; 70. a post-positioned filter element; 80. a pure water reflux bypass; 81. a return solenoid valve; 82. a one-way valve; 90. a pulse flushing unit; 91. combining electromagnetic valves; 911. switching on and off the electromagnetic valve; 912. waste water ratio solenoid valve.

[ detailed description ] A

The invention will be described in detail below with reference to the drawings, wherein examples of the embodiments are shown in the drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1, the water purifier backflow system according to the present invention is shown, which includes a water inlet solenoid valve 10, a temperature sensor 25, a first TDS probe 21, a booster pump 30, a reverse osmosis membrane filter element 40, and a water outlet 50;

the waterway pipeline is connected to the reverse osmosis membrane filter element 40 through the water inlet electromagnetic valve 10, and is connected to the water outlet 50 after passing through the reverse osmosis membrane filter element 40, and the water inlet end of the reverse osmosis membrane filter element 40 is provided with a booster pump 30 for boosting the water inlet end of the reverse osmosis membrane filter element; be equipped with temperature sensor 25 and first TDS probe 20 between inlet solenoid valve 10 and booster pump 30, supply water and pass through inlet solenoid valve 10 after, in being impressed reverse osmosis membrane filter core 40 by the booster pump pressure through first TDS probe 20, the pure water is provided the user through delivery port 50 after handling through reverse osmosis membrane filter core 40.

In the scheme of improving the system, a pre-treatment unit 60, a post-filter element 70 and a pure water return bypass 80 are arranged in the system; a pre-treatment unit 60 is arranged between the water inlet electromagnetic valve 10 and the booster pump 30, a post-filter element 70 is additionally arranged at the rear end of the reverse osmosis membrane filter element 40, and a pure water backflow bypass 80 is arranged between the rear end of the post-filter element 70 and the front end of the pre-treatment unit 60 in parallel.

A second TDS probe 22 is added between the pre-processing unit 60 and the booster pump 30.

Further, the pure water reflux bypass 80 includes a third TDS probe 23, a reflux solenoid valve 81, and a check valve 82, wherein the reflux direction is opposite to the normal filtering water supply direction, and pure water discharged from the post-filter cartridge 70 passes through the third TDS probe 23, the reflux solenoid valve 81, and the check valve 82 in sequence, and is connected to the front end of the pre-treatment unit 60.

The system also comprises a pulse flushing unit 90, wherein the pulse flushing unit 90 is directly connected to the concentrated water end of the reverse osmosis membrane filter element, the pulse flushing unit 90 comprises a solenoid valve combination 91 and a fourth TDS probe 24, wherein the solenoid valve combination 91 comprises an on-off solenoid valve 911 and a waste water ratio solenoid valve 912. The pulse flushing unit is mainly used for discharging waste water in a pulse mode, for example, the waste water is opened for 5 seconds and closed for 1 second compared with an electromagnetic valve, and pulse discharge is formed in a reciprocating cycle mode.

In a normal operating mode: when the water outlet 50 is opened, the water inlet electromagnetic valve 10 is opened, the booster pump 30 is started, the return electromagnetic valve 81 in the pure water return bypass 80 is closed, and pure water does not return; raw water enters the reverse osmosis membrane filter element 40 through the water inlet electromagnetic valve 10, the temperature sensor 25, the first TDS probe, the pre-processing unit 60, the second TDS probe and the booster pump 30 in a pressurizing mode. The pure water flows out from the water outlet 50 after passing through the post-filter element 70.

Shutdown post-flush mode: after the water outlet 50 is closed, the water inlet electromagnetic valve 10 is continuously opened, and the booster pump is started; raw water enters the reverse osmosis membrane filter element 40 through the pressurization of the booster pump 30 after passing through the water inlet electromagnetic valve 10, the temperature sensor 25, the first TDS probe, the pre-processing unit 60 and the second TDS probe. The backflow solenoid valve 81 in the pure water backflow bypass 80 is opened, pure water enters the pure water backflow bypass 80 through the post-filter element 70 to perform a backflow procedure, passes through the third TDS probe 23, the opened backflow solenoid valve 81 and the check valve 82, enters the pre-treatment unit 60 together with raw water, can continuously dilute the TDS value of the residual water in the pre-treatment unit, and concentrated water in the reverse osmosis membrane filter element is continuously discharged through the pulse flushing unit 90.

When the second TDS probe detects that the TDS value is lower than the preset concentration, the booster pump is closed, the low-concentration water stored in the pre-processing unit 60 is pushed out by the raw water pressure to flush the reverse osmosis membrane shell, the electromagnetic valve combination 91 in the pulse flushing unit is completely opened at the moment, the waste water is discharged, the backflow electromagnetic valve 81 is closed, and the standby mode is entered.

Mode through utilizing the pure water backward flow enters into leading processing unit, let pure water and raw water mix, reduce raw water TDS value and can let deposit water concentration in the infiltration membrane filter core and reduce, then shut down behind a period of time reverse osmosis membrane pure water side concentration also can corresponding reduction, when opening the delivery port once more, through the dilution of depositing water in rearmounted filter core 70, can solve the too high problem of first cup water TDS basically, whole backward flow and washing in-process, the waste water discharge is less.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention is disclosed in the above description in terms of preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art will be able to make any changes or modifications to the equivalent embodiments without departing from the scope of the present invention, and all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A pure water backflow system of a water purifier comprises a water inlet electromagnetic valve, a temperature sensor, a first TDS probe, a booster pump, a reverse osmosis membrane filter element and a water outlet, wherein a water channel pipeline is connected to the reverse osmosis membrane filter element through the water inlet electromagnetic valve and is connected to the water outlet after passing through the reverse osmosis membrane filter element; a prepositive processing unit is arranged between the water inlet electromagnetic valve and the booster pump, a postpositive filter element is additionally arranged at the rear end of the reverse osmosis membrane filter element, and a pure water backflow bypass is parallelly arranged between the rear end of the postpositive filter element and the front end of the prepositive processing unit.

2. The water purifier pure water recirculation system of claim 1, wherein a second TDS probe is added between the pre-treatment unit and the booster pump.

3. The water purifier pure water backflow system of claim 2, wherein the pure water backflow bypass comprises a third TDS probe, a backflow solenoid valve and a one-way valve, wherein the backflow direction is opposite to the normal filtering water supply direction, and pure water coming out of the rear filter element sequentially passes through the third TDS probe, the backflow solenoid valve and the one-way valve and is connected to the front end of the pre-processing unit.

4. The water purifier pure water reflux system as defined in claim 3, further comprising a pulse flushing unit directly connected to the concentrate side of the reverse osmosis membrane cartridge, the pulse flushing unit comprising a solenoid valve assembly and a fourth TDS probe, wherein the solenoid valve assembly comprises an on-off solenoid valve and a waste water ratio solenoid valve.