WO2020199918A1

WO2020199918A1 - System and method for keeping water quality of produced water

Info

Publication number: WO2020199918A1
Application number: PCT/CN2020/079867
Authority: WO
Inventors: 刘果; 刘小菡
Original assignee: 宿迁菡束环保设备有限公司
Priority date: 2019-03-29
Filing date: 2020-03-18
Publication date: 2020-10-08
Also published as: CN110950447A

Abstract

A system for keeping water quality of produced water, comprising: an integrated assembly (1) comprising an integrated filter element, a first water inlet, a pure water output assembly, and a first concentrated water port; wherein the first concentrated water port is connected to one end of a concentrated water regulating valve (2); the other end of the concentrated water regulating valve (2) is connected to a controlled end of a four-side valve (3); the pure water output assembly comprises a first pure water port; s first switch (4) assembly is respectively connected to the first pure water port and a control end of the four-side valve (3); the four-side valve (3) is used for concentrated water flowing into the controlled end to turn on the four-side valve (3) by means of a liquid pressure difference of the controlled end to the control end when the first switch (4) assembly is turned on, and the concentrated water is discharged to the outside; and when the first switch (4) assembly is turned off, the pure water flowing into the control end turns off the four-side valve (3) by means of a liquid pressure difference of the control end to the controlled end, and the concentrated water is stopped from being discharged to the outside. Further provided is a method for keeping water quality of produced water.

Description

System and method for maintaining water quality

Technical field

This application relates to the field of water purification, in particular to systems and methods for maintaining the quality of water produced.

Background technique

A water purification system that uses ultra-low pressure reverse osmosis membranes and relies on tap water pressure to drive can achieve no electricity drive and directly purify tap water into direct drinking water. It has broad application prospects for the household water purification market.

However, because the pressure of tap water varies greatly from one household to another, especially in an environment with low tap water pressure, the water purification system will have insufficient water production rate and substandard purified water quality. Similarly, after the water purification system has been working for a long time, the isolated concentrated water at the concentrated water end is not discharged in time, and some of it will adhere and precipitate on the membrane, resulting in higher and higher TDS values of the water quality recovered by the water purification system. It becomes bitter and eventually causes unqualified purified water. However, the user is often unaware, especially the user will not take the initiative to manually adjust the concentrated water regulating valve to flush the system.

In addition, ultra-low pressure reverse osmosis membranes and ultra-low pressure nanofiltration membranes are more prominently affected by the head glass of water. When the water purification system stops running, the concentrated water remaining in the membrane shell passes through the purified water at the other end of the membrane. The pressure is mutually infiltrated, so that the water quality of the direct drinking water at the water purification end is close to concentrated water over time, so the purified water remaining in the membrane shell becomes unqualified drinking water. How to avoid the frequent activation of the water purification system will also inhibit the production of the first cup of water, so that the stability of the purified water quality can be guaranteed!

How to suppress the production of the first glass of water, the long-term stability of the purified water quality and the realization of micro-emissions is the time when the non-electric water purifier will benefit thousands of households; therefore, it is urgent to overcome the above technical barriers and invent relevant equipment and solutions!

technical problem

The present application provides a system and method for maintaining the quality of water production; to solve the problem of overly complex operation of the water production process.

Technical solutions

In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

This application provides a system for maintaining the quality of water produced, which is characterized in that it includes:

Integrated components, including: integrated filter element, first water inlet, pure water output component and first concentrated water outlet;

The first concentrated water port is connected to one end of the concentrated water regulating valve and is used to output concentrated water generated by the integrated filter element;

The pure water output assembly includes a first pure water port for outputting pure water produced by the integrated filter element;

The other end of the concentrated water regulating valve is connected with the controlled end of the four-sided valve, and is used to maintain a preset discharge ratio of pure water concentrated water;

The first switch assembly is respectively connected with the first pure water port and the control end of the four-sided valve;

The four-sided valve is used to open the four-sided valve when the first switch assembly is opened, and the concentrated water flowing into the controlled end relies on the liquid pressure difference between the controlled end and the control end to open the four-sided valve and discharge the concentrated water to the outside When the first switch assembly is closed, the pure water flowing into the control end depends on the liquid pressure difference of the control end to the controlled end to close the four-sided valve and stop the external discharge of the concentrated water.

Preferably, the system further includes a flushing component;

The flushing assembly is connected with the first concentrated water port and used for flushing the integrated filter element when the flushing assembly is opened.

Preferably, the flushing assembly includes a second switch connected to the first concentrated water port.

Preferably, the flushing assembly includes a first one-way valve connected to an input end of the first concentrated water port and a second switch connected to an output end of the first one-way valve.

Preferably, the system further includes a pressure reducing valve connected to the first water inlet.

Preferably, the pure water output assembly further includes a second one-way valve, and the output end of the second one-way valve is connected to the first pure water port.

Preferably, the integrated filter element includes a pre-filter element and a filter membrane element;

Preferably, the pre-filter element includes one of the following layered combined structures: PP cotton layer and activated carbon carbon rod layer, or PP cotton layer and a mixture layer of activated carbon and resin, or PP cotton layer, activated carbon and resin The mixed body layer and PP cotton layer, or PP cotton layer and activated carbon fiber layer.

Preferably, the filter membrane element includes: an ultra-low pressure reverse osmosis membrane or an ultra-low pressure nanofiltration membrane.

Preferably, the first switch assembly includes a self-locking liquid level valve and/or a water cutoff valve installed in a water storage tank;

The self-locking liquid level valve is used to control whether to input pure water into the water storage tank according to whether the pure water level in the water storage tank reaches a preset height;

The water cutoff valve is used to manually control whether to input pure water into the water storage tank.

Preferably, the self-locking liquid level valve includes a first valve body and a floating ball arranged in the pure water tank, which is used to, according to the buoyancy of the pure water in the water storage tank on the floating ball, The first valve body is controlled to close by the floating ball, so that the pure water stops flowing through the first valve body.

Preferably, the self-locking liquid level valve further includes a forced button for manually opening the first valve body so that the pure water flows through the first valve body.

Preferably, the water cutoff valve is arranged in the upper cover of the water storage tank, and is used to close the water cutoff valve when the upper cover is opened; and open the water cutoff valve when the upper cover is closed.

The present application provides a method for maintaining the quality of water produced, and the method includes the system for maintaining the quality of water produced as described above;

Turn on the first switch assembly, so that the water to be treated flows into the integrated assembly through the first water inlet;

The water to be treated is passed through the integrated filter element to generate pure water and concentrated water;

The pure water is externally output through the first pure water port and the first switch assembly;

The concentrated water flows into the controlled end through the concentrated water regulating valve, and the four-sided valve is opened by relying on the liquid pressure difference between the controlled end and the control end to discharge the concentrated water to the outside.

Further, the method further includes:

Closing the first switch assembly, so that the water to be treated flows into the integrated assembly through the first water inlet;

The water to be treated is passed through the integrated filter element to generate the pure water and the concentrated water;

The pure water flows into the control end through the first pure water port, and the four-sided valve is closed depending on the liquid pressure difference between the control end and the controlled end, and the concentrated water is stopped to be discharged to the outside.

Further, the method further includes:

The second switch is turned on, so that the water to be treated flows into the integrated assembly through the first water inlet, and is discharged to the outside through the first concentrated water inlet and the second switch.

Beneficial effect

This application provides a system and method for maintaining the quality of water produced. Provides a system that reduces user participation and maintains system water quality. Usually, when installing a water purification system, according to local water quality conditions, the pure water concentrated water discharge ratio of the concentrated water regulating valve is preset. Then, by passively cleaning the impurities in the integrated components to reduce the concentration of impurities, the user's direct intervention in the water purification system is reduced, and the water purification system is indirectly interfered through daily life to achieve the purpose of maintaining the quality of the water produced.

In our daily work, we have completed the timely flushing of the water purification system, and achieved flushing without wasting water resources, and truly achieved zero emission of flushing. It solves the complicated operation of the non-electrically driven water purification system that requires regular opening of the concentrated water regulating valve for flushing, so that the water quality can maintain long-term stability of the water quality without user intervention, and effectively inhibits the industry that uses permeable membrane equipment. Sexual technical difficulties. At the same time, it avoids the sedimentation of the filter material, which will cause dirt and blockage and bring economic losses.

Description of the drawings

Figure 1 is a schematic structural diagram of a system for maintaining the quality of water produced by an embodiment of the application;

2 is a flowchart of a method for maintaining the quality of water produced by an embodiment of the application;

Fig. 3 is a flowchart of a method for maintaining the quality of water produced by an embodiment of the application.

Description of reference signs

1-Integrated components, 2-concentrated water regulating valve, 3-four-side valve, 4-first switch, 5-second switch, 6-reducing valve, 7-first check valve, 8-second check valve , 9- water storage tank;

11-pre-filter element, 12-filter membrane;

41-self-locking liquid level valve, 42-water cut valve;

411-first valve body, 412-floating ball;

421-Upper cover.

Embodiments of the invention

Hereinafter, specific embodiments of the application will be described in detail with reference to the accompanying drawings, but it is not a limitation of the application.

It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be regarded as a limitation, but merely as an example of an embodiment. Those skilled in the art will think of other modifications within the scope and spirit of this application.

The drawings included in the specification and constituting a part of the specification illustrate the embodiments of the present application, and together with the general description of the application given above and the detailed description of the embodiments given below, are used to explain the application principle.

These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples with reference to the accompanying drawings.

It should also be understood that although the application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the application, which have the features described in the claims and are therefore located here. Within the limited scope of protection.

The above and other aspects, features and advantages of this application will become more apparent in view of the following detailed description when combined with the drawings.

Hereinafter, specific embodiments of the present application will be described with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present application, which can be implemented in various ways. Well-known and/or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details to obscure the present application. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as the basis and representative basis of the claims to teach those skilled in the art to use the present in a variety of ways with substantially any suitable detailed structure. Application.

This specification may use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", which can all refer to the same according to the application. Or one or more of the different embodiments.

This application provides a system for maintaining the quality of water produced; this application also provides a method for maintaining the quality of water produced. Detailed descriptions are given in the following embodiments one by one.

The first embodiment provided in this application is an embodiment of a system for maintaining the quality of water produced.

This embodiment will be described in detail below with reference to FIG. 1, where FIG. 1 is a schematic structural diagram of a system for maintaining the quality of water produced by an embodiment of the application.

This embodiment provides a system for maintaining the quality of water produced, including:

Integrated component 1, including: integrated filter element, first water inlet, pure water output component and first concentrated water outlet.

The integrated filter element is used for filtering the water to be treated input into the first water inlet to generate pure water (direct drinking water) and concentrated water that can be directly drinkable.

The integrated filter element includes a pre-filter element 11 and a filter membrane element 12.

The pre-filter element 11 is mainly used to remove silt, rust, colloids, odors, organic matter and other harmful substances in the water to be treated to achieve the pre-treatment effect.

The pre-filter element 11 and the filter membrane element 12 can be integrated or separated. In order to ensure a large flux, preferably, the pre-filter element 11 is looped around the periphery of the filter membrane 12 to ensure a large flux of the water to be treated.

The pre-filter element 11 includes one of the following layered combined structures: PP cotton layer and activated carbon carbon rod layer, or PP cotton layer and a mixture layer of activated carbon and resin, or a mixture of PP cotton layer, activated carbon and resin Body layer and PP cotton layer, or PP cotton layer and activated carbon fiber layer.

The membrane filter 12 includes an ultra-low pressure reverse osmosis membrane or an ultra-low pressure nanofiltration membrane.

The first concentrated water port is connected to one end of the concentrated water regulating valve 2 for outputting concentrated water produced by the integrated filter element.

The pure water output assembly includes a first pure water port for outputting pure water produced by the integrated filter element.

The other end of the concentrated water regulating valve 2 is connected to the controlled end of the four-sided valve 3 for maintaining the preset discharge ratio of pure water concentrated water.

The concentrated water regulating valve 2 is used to adjust the discharge ratio of pure water concentrated water for different water quality. While ensuring the quality and efficiency of water production, it also ensures water conservation.

Generally, in a water purification system, as the system is used for a long time, a large amount of impurities will accumulate in the integrated component 1 and gradually reduce the efficiency of water purification. The generally adopted method is to periodically adjust the pure water concentrated water discharge ratio of the concentrated water regulating valve 2. In order to achieve the purpose of ensuring water quality. This method brings a lot of trouble to users.

This embodiment provides a system for maintaining the water quality of the system that reduces user participation. Usually when installing a water purification system, according to the local water quality conditions, the pure water concentrated water discharge ratio of the concentrated water regulating valve 2 is preset. Then, by cleaning the integrated component 1 to reduce the concentration of impurities, the user's direct intervention in the water purification system is reduced, and the water purification system is indirectly interfered through daily life to achieve the purpose of maintaining the quality of the water produced.

The first switch 4 components are respectively connected with the first pure water port and the control end of the four-sided valve 3.

The four-sided valve 3 is used to open the first switch 4 assembly, and the concentrated water flowing into the controlled end relies on the liquid pressure difference between the controlled end and the control end to open the four-sided valve 3 and discharge it to the outside. The concentrated water.

Since the first switch 4 assembly is opened, the pure water flows out through the first switch 4 assembly, so that the control end of the four-sided valve 3 is in a low pressure state, and the concentrated water causes the four-sided valve The piston in 3 is opened, and the concentrated water is discharged to the outside. For example, the concentrated water is discharged into a floor drain.

The four-sided valve 3 is used to close the first switch 4 assembly, and the pure water flowing into the control end depends on the liquid pressure difference between the control end and the controlled end to close the four-sided valve 3 and stop the external The concentrated water is discharged.

Since the first switch 4 component is closed, the pure water flows to the control end of the four-sided valve 3 through the first switch 4 component, so that the control end of the four-sided valve 3 is in a high-pressure state, and the pressure difference The piston in the four-sided valve 3 is closed, so that the controlled end stops discharging the concentrated water to the outside. Avoid the influence of shut-off pressure on the water purification system.

The system also includes a flushing component.

In order to realize the flushing function of the integrated component 1. Preferably, the flushing assembly includes a second switch 5 connected to the first concentrated water port.

For example, the second switch 5 is set at the cold water end of the tap in the kitchen. When we need to clean the fruits and vegetables, we can open the tap while washing the integrated component 1; The tap water is pretreated and filtered by the integrated component 1, which is safer to use; at the same time, it avoids the phenomenon of dirty and clogged taps.

Preferably, the flushing assembly includes a first check valve 7 connected to the input end of the first concentrated water port and a second switch 5 connected to the output end of the first check valve 7.

For example, continuing the above example, in order to prevent the hot water pipe of the tap water tap from flowing back into this branch, the first one-way valve 7 is set between the first concentrated water outlet and the tap water tap to avoid some special situations. Such as the problem of hot water backflow; in order to ensure a large flow of water from the tap, the water purification system can use a 3-point junction and a connecting pipe, wherein the first water inlet of the integrated assembly 1 and the first concentration The nozzles all use larger size joints.

In this embodiment, we complete the timely flushing of the water purification system during our daily work, and realize flushing without wasting water resources, and truly achieve zero emission of flushing. It solves the complicated operation of the non-electrically driven water purification system that requires regular opening of the concentrated water regulating valve for flushing, so that the water quality can maintain long-term stability of the water quality without user intervention, and effectively inhibits the industry that uses permeable membrane equipment. Sexual technical difficulties. At the same time, it avoids the sedimentation of the filter material, which will cause dirt and blockage and bring economic losses. In order to reduce the impact of water hammer on the water purification system, preferably, the system further includes a pressure reducing valve 6 connected to the first water inlet.

Adding the pressure reducing valve 6 to the water purification system can suppress the impact of water hammer on the water purification system. In the water purification system, the components that are often impacted by water hammer include: filter housing, various waterway joints, etc.

In order to avoid the reduction of water pressure, a reverse flow is generated. Preferably, the pure water output assembly further includes a second one-way valve 8, and the output end of the second one-way valve 8 is connected to the first pure water port.

The pure water output through the membrane filter 12 is output through the second one-way valve 8 and the first pure water port.

In a specific application scenario. The first switch 4 assembly includes a self-locking liquid level valve 41 and/or a water cutoff valve 42 installed in the water storage tank 9.

The self-locking liquid level valve 41 is used to control whether to input pure water into the water storage tank 9 according to whether the pure water level in the water storage tank 9 reaches a preset height.

The water cutoff valve 42 is used to manually control whether to input pure water into the water storage tank 9.

Preferably, the self-locking liquid level valve 41 includes a first valve body 411 and a floating ball 412 arranged in the pure water tank, which is used to float the water according to the pure water in the water storage tank 9. The buoyancy of the ball 412 controls the closing of the first valve body 411 by the floating ball 412, so that the pure water stops flowing through the first valve body 411.

Preferably, the self-locking liquid level valve 41 further includes a forcing button for manually opening the first valve body 411 so that the pure water flows through the first valve body 411.

Preferably, the water cutoff valve 42 is provided in the upper cover 421 of the water storage tank 9 for closing the water cutoff valve 42 when the upper cover 421 is opened; and opens when the upper cover 421 is closed The water shutoff valve 42.

For example, when the upper cover 421 of the water storage tank 9 is opened, the water cutoff valve 42 is closed, which can avoid the phenomenon of pure water being thrown when water is taken in the water production process. After water is taken, the upper cover 421 can be closed. At this time, the water cutoff valve 42 is opened at the same time. Press the forced button on the upper cover 421 to open the self-locking liquid level valve 41 and start water production. .

The second embodiment provided for this application is an embodiment of a method for maintaining the quality of water produced.

This embodiment will be described in detail below with reference to FIG. 2. In which, FIG. 2 is a flowchart of a method for maintaining the quality of water produced by an embodiment of the application; FIG. 3 is a method for maintaining the quality of water produced by an embodiment of the application. Flow chart of the method.

The description of the second embodiment provided in this application is relatively simple. For related parts, please refer to the corresponding description of the first embodiment provided above. The embodiments described below are merely illustrative.

This embodiment provides a method for maintaining the quality of water produced, and the method includes the system for maintaining the quality of water produced as described in the first embodiment. Please refer to Figure 2, the specific steps are as follows:

Step 101: Turn on the first switch 4 assembly, so that the water to be treated flows into the integrated assembly 1 through the first water inlet.

Step 102: The water to be treated passes through the integrated filter element to generate pure water and concentrated water.

Step 103, the pure water is output to the outside through the first pure water port and the first switch 4 assembly.

Step 104, the concentrated water flows into the controlled end through the concentrated water regulating valve 2, and the four-sided valve 3 is opened by the liquid pressure difference between the controlled end and the control end, and the concentrated water is discharged to the outside. .

As shown in Figure 3, the method further includes the following steps:

Step 201: Turn off the first switch 4 assembly, so that the water to be treated flows into the integrated assembly 1 through the first water inlet.

In step 202, the water to be treated is passed through the integrated filter element to generate the pure water and the concentrated water.

Step 203: The pure water flows into the control end through the first pure water port, and the four-sided valve 3 is closed by the liquid pressure difference between the control end and the controlled end, and the concentrated water is stopped to be discharged to the outside. .

The method further includes the following steps:

The second switch 5 is turned on, so that the water to be treated flows into the integrated assembly 1 through the first water inlet, and is discharged to the outside through the first concentrated water inlet and the second switch 5.

This application provides a system that reduces user participation and maintains system water quality. Usually, when installing a water purification system, according to local water quality conditions, the discharge ratio of the pure water concentrated water of the concentrated water regulating valve is preset. Then, by passively cleaning the impurities in the integrated components and reducing the concentration of impurities, the user's direct intervention in the water purification system is reduced, and the water purification system is indirectly interfered through daily life to achieve the purpose of maintaining the quality of the water produced.

The above embodiments are only exemplary embodiments of the application, and are not used to limit the application, and the protection scope of the application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within the essence and protection scope of this application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of this application.

Industrial applicability

This application provides a system that reduces user participation and maintains system water quality. Usually, when installing a water purification system, according to local water quality conditions, the pure water concentrated water discharge ratio of the concentrated water regulating valve is preset. Then, by passively cleaning the impurities in the integrated components to reduce the concentration of impurities, the user's direct intervention in the water purification system is reduced, and the water purification system is indirectly interfered through daily life to achieve the purpose of maintaining the quality of the water produced.

Claims

A system for maintaining the quality of water produced, characterized in that it comprises:

Integrated components, including: integrated filter element, first water inlet, pure water output component and first concentrated water outlet;

The first concentrated water port is connected to one end of the concentrated water regulating valve and is used to output concentrated water generated by the integrated filter element;

The pure water output assembly includes a first pure water port for outputting pure water produced by the integrated filter element;

The other end of the concentrated water regulating valve is connected with the controlled end of the four-sided valve, and is used to maintain a preset discharge ratio of pure water concentrated water;

The first switch assembly is respectively connected with the first pure water port and the control end of the four-sided valve;

The four-sided valve is used to open the four-sided valve when the first switch assembly is opened, and the concentrated water flowing into the controlled end relies on the liquid pressure difference between the controlled end and the control end to open the four-sided valve and discharge the concentrated water to the outside When the first switch assembly is closed, the pure water flowing into the control end depends on the liquid pressure difference of the control end to the controlled end to close the four-sided valve and stop the external discharge of the concentrated water.

2. The system according to claim 1, wherein the system further comprises a flushing component;

The flushing assembly is connected with the first concentrated water port and used for flushing the integrated filter element when the flushing assembly is opened.

3. The system according to claim 2, wherein the flushing assembly comprises a second switch connected to the first concentrated water port.

4. The system according to claim 2, wherein the flushing assembly includes a first one-way valve connected to the input end of the first concentrated water port and a first one-way valve connected to the output end of the first one-way valve. The second switch.

5. The system according to claim 1, wherein the system further comprises a pressure reducing valve connected to the first water inlet.

6. The system according to claim 1, wherein the pure water output assembly further comprises a second one-way valve, and the output end of the second one-way valve is connected to the first pure water port.

7. The system of claim 1, wherein the integrated filter element includes a pre-filter element and a filter membrane element.

8. The system according to claim 7, wherein the pre-filter element comprises one of the following layered combined structures: PP cotton layer and activated carbon carbon rod layer, or PP cotton layer and activated carbon and resin Mixed body layer, or PP cotton layer, activated carbon and resin mixed body layer and PP cotton layer, or PP cotton layer and activated carbon fiber layer.

9. The system according to claim 7, characterized in that the filter membrane element comprises: an ultra-low pressure reverse osmosis membrane or an ultra-low pressure nanofiltration membrane.

10. The system according to any one of claims 1-9, wherein the first switch assembly comprises a self-locking liquid level valve and/or a water cutoff valve installed in a water storage tank;

The self-locking liquid level valve is used to control whether to input pure water into the water storage tank according to whether the pure water level in the water storage tank reaches a preset height;

The water cutoff valve is used to manually control whether to input pure water into the water storage tank.

11. The system according to claim 10, wherein the self-locking liquid level valve comprises a first valve body and a floating ball arranged in a pure water tank, which is used to adjust The buoyancy of the pure water on the floating ball is controlled by the floating ball to close the first valve body, so that the pure water stops flowing through the first valve body.

12. The system according to claim 11, wherein the self-locking liquid level valve further comprises a forced button for manually opening the first valve body to allow pure water to flow through the first valve body.

13. The system according to claim 10, wherein the water cutoff valve is arranged in the upper cover of the water storage tank for closing the water cutoff valve when the upper cover is opened; When the upper cover is mentioned, open the water shutoff valve.

14. A method for maintaining the quality of water produced, characterized in that the method comprises the system for maintaining the quality of water produced according to any one of claims 1 to 13;

Turn on the first switch assembly, so that the water to be treated flows into the integrated assembly through the first water inlet;

The water to be treated is passed through the integrated filter element to generate pure water and concentrated water;

The pure water is externally output through the first pure water port and the first switch assembly;

The concentrated water flows into the controlled end through the concentrated water regulating valve, and the four-sided valve is opened by relying on the liquid pressure difference between the controlled end and the control end to discharge the concentrated water to the outside.

15. The method of claim 14, wherein the method further comprises:

Closing the first switch assembly, so that the water to be treated flows into the integrated assembly through the first water inlet;

The water to be treated is passed through the integrated filter element to generate the pure water and the concentrated water;

The pure water flows into the control end through the first pure water port, and the four-sided valve is closed depending on the liquid pressure difference between the control end and the controlled end, and the concentrated water is stopped to be discharged to the outside.

16. The method according to claim 14, wherein the method further comprises:

The second switch is turned on, so that the water to be treated flows into the integrated assembly through the first water inlet, and is discharged to the outside through the first concentrated water inlet and the second switch.