CN219384852U - Water purifier and purifying system - Google Patents

Abstract

The application relates to the technical field of water purifying equipment and discloses a water purifier. The application provides a purifier includes casing and stack layer subassembly. The shell is internally provided with a containing cavity and comprises a raw water inlet, a pure water outlet and a concentrated water outlet; the stacking layer assembly comprises a folded membrane which is used for unidirectionally filtering and purifying raw water, is positioned in the accommodating cavity and divides the accommodating cavity into a plurality of pure water flow paths and raw water flow paths; raw water enters the raw water flow path from the raw water inlet, part of raw water in the raw water flow path enters the pure water flow path through membrane filtration and is discharged through the pure water outlet, and concentrated water formed by impurities and raw water in the raw water flow path is discharged through the concentrated water outlet. The water purifier in the application improves the effective raw water flow through a plurality of raw water flow paths, improves the water production efficiency, and solves the problem that the water purifier is slow in purifying water. The application also discloses a purification system.

Description

Water purifier and purifying system

Technical Field

The application relates to the technical field of household appliances, for example to a water purifier and a purification system.

Background

Along with the improvement of living standard, the water purifier becomes an indispensable article for improving living quality and is widely applied. A conventional coiled reverse osmosis membrane element in the market is formed by superposing a composite multi-layer winding central tube formed by reverse osmosis membrane sheets, water inlet grids and pure water diversion grids, wherein the central tube is arranged between the folded reverse osmosis membrane sheets, the water inlet grids are positioned in water inlet channels formed between the folded inner surfaces of the reverse osmosis membrane sheets, the pure water diversion grids are positioned in water outlet channels formed between the folded outer surfaces of the reverse osmosis membrane sheets, the two side end surfaces of the reverse osmosis membrane sheets and the wall of the winding central tube are adhered by glue, the whole outer surfaces are wrapped and sealed by adhesive tapes, and a layer of sealing ring is added. One end of the conventional coiled reverse osmosis element is a raw water channel, a part of raw water is filtered by a reverse osmosis membrane to form pure water, the pure water flows into the central tube along the pure water guide net, and the remaining concentrated water which is not filtered flows out from the other end face of the element along the water inlet grid. The coiled reverse osmosis membrane element has long service time, easy scaling and shortened service life.

In the related art, a small combined type efficient water purifying device is disclosed, and comprises a barrel body, a top cover arranged at the top of the barrel body, a water inlet pipe arranged on one side wall of the barrel body and a water outlet pipe arranged on the other side wall of the barrel body, wherein a partition plate is arranged in the barrel body, a gap is reserved between the bottom of the partition plate and the bottom of the barrel body, an ultraviolet lamp is arranged on the partition plate, a first mounting plate is arranged on the inner wall of the barrel body, and a reverse osmosis membrane is arranged on the first mounting plate; the supernatant passes through the reverse osmosis membrane after ultraviolet disinfection and gravity sedimentation, impurities in the water flow are removed by utilizing the filtering effect of the reverse osmosis membrane on the water flow, and meanwhile, the impurities in the water flow are subjected to preliminary treatment after the pretreatment of the water flow, so that the burden of the reverse osmosis membrane is reduced, and the service life of the reverse osmosis membrane is prolonged.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the water purifying equipment in the related art has complex water preparing flow and low water preparing speed.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a water purifier, wherein a stacking layer assembly is positioned in a containing cavity and divides the containing cavity into a plurality of pure water flow paths and raw water flow paths; raw water enters the raw water flow path from the raw water inlet, part of raw water in the raw water flow path enters the pure water flow path through membrane filtration and is discharged through the pure water outlet, and concentrated water formed by impurities and raw water in the raw water flow path is discharged through the concentrated water outlet. The water purifier in the application improves the effective raw water flow through a plurality of raw water flow paths, improves the water production efficiency, and solves the problem that the water purifier is slow in purifying water.

In some embodiments, a water purifier includes a housing and a stacked layer assembly. The shell is internally provided with a containing cavity and comprises a raw water inlet, a pure water outlet and a concentrated water outlet; the stacking layer assembly comprises a folded membrane which is used for unidirectionally filtering and purifying raw water, is positioned in the accommodating cavity and divides the accommodating cavity into a plurality of pure water flow paths and raw water flow paths; raw water enters the raw water flow path from the raw water inlet, part of raw water in the raw water flow path enters the pure water flow path through membrane filtration and is discharged through the pure water outlet, and concentrated water formed by impurities and raw water in the raw water flow path is discharged through the concentrated water outlet.

In some alternative embodiments, the stacking layer assembly further comprises a clamp assembly, the clamp assembly comprises a raw water clamp and a pure water clamp which are connected, the raw water clamp and the pure water clamp enclose a cavity to wrap the whole membrane, and the pure water clamp is provided with a plurality of flow guide parts.

In some alternative embodiments, the housing includes a first cover plate, a second cover plate, and a third cover plate. The first cover plate is connected with the pure water clamp, and a pure water outlet is formed in the first cover plate; the second cover plate is connected with one side of the clamp assembly, and a raw water inlet is formed in the second cover plate; the third cover plate is connected with the other side of the clamp assembly, and a concentrated water outlet is formed in the third cover plate.

In some alternative embodiments, the first cover plate, the second cover plate and the third cover plate are all provided with grooves, the membrane is attached to the edges of the grooves, and the notch of the grooves faces the accommodating cavity to form the collecting chamber.

In some alternative embodiments, a second cover plate is disposed opposite the third cover plate, the second cover plate being adjacent the first cover plate.

In some alternative embodiments, both sides of the pure water flow path are sealed by a sealing member in a folding direction perpendicular to the membrane.

In some alternative embodiments, the internal pressure of the holding chamber ranges from [0.6,0.9] MPa in the operating state of the water purifier.

In some alternative embodiments, the flow guide portion includes a flow guide hole, and the plurality of flow guide holes corresponds to the plurality of pure water flow paths.

In some embodiments, the purification system comprises a water purifier as described above.

In some alternative embodiments, the piping of the purification system includes a main piping and a branch piping. The main pipeline comprises a front filter element, a water inlet valve, a water pump, a raw water inlet of the water purifier, a pure water outlet of the water purifier, a rear filter element and a water tap which are connected in sequence; the branch pipeline comprises a concentrated water outlet and a waste water valve of the water purifier, which are connected in sequence.

The water purifier provided by the embodiment of the disclosure can realize the following technical effects:

the water purifier includes a cabinet and a stack assembly. The shell is internally provided with a containing cavity and comprises a raw water inlet, a pure water outlet and a concentrated water outlet; the stacking layer assembly comprises a folded membrane which is used for unidirectionally filtering and purifying raw water, is positioned in the accommodating cavity and divides the accommodating cavity into a plurality of pure water flow paths and raw water flow paths; raw water enters the raw water flow path from the raw water inlet, part of raw water in the raw water flow path enters the pure water flow path through membrane filtration and is discharged through the pure water outlet, and concentrated water formed by impurities and raw water in the raw water flow path is discharged through the concentrated water outlet. The water purifier improves the effective raw water flow through a plurality of raw water flow paths, improves the water production efficiency, and solves the problem of slow water purification and water outlet of the water purifier.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic view of the overall structure of a diaphragm provided by an embodiment of the present disclosure;

FIG. 2 is a schematic view of a partial exploded construction of a diaphragm provided by an embodiment of the present disclosure;

FIG. 3 is a schematic view of a portion of a diaphragm and clip provided by an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a diaphragm provided by an embodiment of the present disclosure;

FIG. 5 is an exploded schematic view of a stacked layer assembly provided by an embodiment of the present disclosure;

FIG. 6 is a schematic view of the overall structure of a stacked layer assembly provided by an embodiment of the present disclosure;

FIG. 7 is a schematic cross-sectional view of a stacked layer assembly provided by an embodiment of the present disclosure;

fig. 8 is a schematic flow path diagram of a purification system provided by an embodiment of the present disclosure.

Reference numerals:

1: a membrane; 11: a raw water flow path; 12: a pure water flow path; 13: a raw water guide layer; 14: a pure water diversion layer;

2: a clip assembly; 21: a raw water clamp; 22: a pure water clamp; 221: a flow guiding part;

31: a first cover plate; 311: a pure water outlet; 32: a second cover plate; 321: a raw water inlet; 322: a groove; 33: a third cover plate; 331: a concentrated water outlet;

41: a filter element is arranged in front; 42: a water inlet valve; 43: a water pump; 44: a rear filter element; 45: a water tap; 46: a waste water valve; 47: a water purifier.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

As shown in connection with fig. 1-8, embodiments of the present disclosure provide a water purifier 47.

The water purifier 47 provided in the embodiment of the present disclosure includes a housing and a stacking layer assembly. A containing cavity is arranged in the shell, and the shell comprises a raw water inlet 321, a pure water outlet 311 and a concentrated water outlet 331; the stacking layer assembly comprises a folded membrane 1, wherein the membrane 1 is used for unidirectionally filtering and purifying raw water, and the stacking layer assembly is positioned in the accommodating cavity and divides the accommodating cavity into a plurality of pure water flow paths 12 and raw water flow paths 11; raw water enters the raw water flow path 11 from the raw water inlet 321, a part of raw water in the raw water flow path 11 enters the pure water flow path 12 through the membrane 1 filtration and is discharged through the pure water outlet 311, and concentrated water formed by impurities and raw water in the raw water flow path 11 is discharged through the concentrated water outlet 331.

The existing water purifier 47 mostly adopts a cylindrical membrane assembly with a central tube, which winds an RO membrane, a water purification diversion net and a wastewater diversion net on a water guide tube, water flow enters from one end of the water guide tube, seeps outwards through a diversion opening on the side wall of the water guide tube, and is shunted through the RO membrane, the wastewater diversion net and the water purification diversion net to prepare pure water.

Compared with the water purifier 47 adopting the cylindrical membrane component, the water purifier can form a plurality of layers of raw water flow paths 11, improves the effective raw water flow paths 11 and has high water production efficiency.

Specifically, the film sheet 1 is repeatedly folded at a preset interval, and the film sheet 1 includes a first fold folded toward a first side and a second fold folded toward a second side, the first side and the second side being opposite in direction. The first fold forms a plurality of first spaces, i.e., pure water flow paths 12, by the pure water guide layer 14; the second fold forms a plurality of second spaces, i.e., raw water flow paths 11, by the raw water guide layer 13. In the process of flowing the raw water in the second space, the raw water is filtered to the first space by the membrane 1 to obtain pure water.

Specifically, the membrane 1 is provided with a raw water guide layer 13 on the front side and a pure water guide layer 14 on the back side. The folding membrane 1 is structured so that the stacked layer assembly has: a plurality of first spaces formed by the pure water diversion layer 14, and a plurality of second spaces formed by the raw water diversion layer 13. In the purification process, after the raw water enters the permeation component, the raw water is divided into a plurality of water flows which flow through a plurality of second spaces. During the process of flowing through the second space, impurities in the raw water are filtered by the pure water guide layer 14 of the membrane 1, and permeate from the second space to the first space to form pure water. The unfiltered raw water and impurities form concentrated water, which is discharged from the second space. Alternatively, the raw water guide layer 13 includes a raw water guide net, and the pure water guide layer 14 includes a pure water guide net.

The application has the following advantages: firstly, a plurality of second spaces are obtained through the folded membrane 1, so that a plurality of raw water flow paths 11 are obtained, the effective flow path of raw water is prolonged, the contact area between the raw water and the raw water guide layer 13 is increased, the water production efficiency is improved, and the problem of slow water outlet of the water purifier 47 is solved; secondly, the folded membrane 1 enables the raw water diversion layer 13 to be positioned on the same side surface, and the pure water diversion layer 14 is positioned on the other side surface, so that compared with the curled filter element, the membrane 1 is not easy to pollute and has long service life; thirdly, compared with the existing curled filter element, the stacked layer assembly is simple in manufacturing process and low in cost; fourth, the folding membrane 1 in the application is more convenient to clean relative to the coiled membrane, solves the problem that the stacking layer is difficult to clean, and prolongs the service life.

Optionally, the stacking layer assembly further includes a clip assembly 2, the clip assembly 2 includes a raw water clip 21 and a pure water clip 22 connected to each other, the raw water clip 21 and the pure water clip 22 enclose a chamber to wrap the whole membrane 1, and the pure water clip 22 is provided with a plurality of flow guiding parts 221.

Specifically, the pure water clip 22 is in an inverted U shape, and the pure water clip 22 is provided with a plurality of flow guide parts 221; the raw water clamp 21 is in an inverted U shape, the raw water clamp 21 is detachably connected with the pure water clamp 22, and a chamber enclosed by the pure water clamp 22 and the raw water clamp 21 is used for coating the membrane 1; the pure water clamp 22 is located at the first space side, and the raw water clamp 21 is located at the second space side. The clamp assembly 2 can protect the diaphragm 1 and avoid the problem that the diaphragm 1 deforms due to external force collision. In addition, the plurality of guide parts 221 on the pure water clamp 22 can guide the pure water, so that the flow velocity of the pure water at each position is more balanced, and noise generated by turbulent flow of the water is avoided.

Optionally, the casing includes a first cover 31, a second cover 32, and a third cover 33. The first cover plate 31 is connected with the pure water clamp 22, and the first cover plate 31 is provided with a pure water outlet 311; the second cover plate 32 is connected with one side of the clamp assembly 2, and the second cover plate 32 is provided with a raw water inlet 321; the third cover plate 33 is connected with the other side of the clamp assembly 2, and the third cover plate 33 is provided with a concentrated water outlet 331.

Specifically, the water flow enters the second space of the permeable membrane assembly from the raw water inlet 321 of the second cover plate 32, and the filtered concentrated water flows out from the concentrated water outlet 331 of the third cover plate 33; the filtered pure water passes through the pure water clip 22 and flows out from the pure water outlet 311 of the first cover plate 31. In this way, raw water, concentrated water and pure water can be separated, and water can be prevented from flowing.

Optionally, the first cover plate 31, the second cover plate 32 and the third cover plate 33 are provided with grooves 322, the membrane 1 is attached to the edges of the grooves 322, and the notches of the grooves 322 face the chamber to form a collecting chamber. The second cover plate 32 and the third cover plate 33 may be disposed opposite to each other or may be adjacent to each other. Preferably, the second cover plate 32 and the third cover plate 33 are disposed opposite to each other, so that the problem of dead spots of scale can be avoided by the straight-line flow.

By arranging the groove 322, the filtered concentrated water can be collected at the groove 322 and then flows out through the concentrated water outlet 331 of the third cover plate 33; the filtered pure water passes through the pure water clips 22, is collected in the corresponding grooves 322, and then flows out from the pure water outlet 311 of the first cover plate 31. Thus, the problem of the damage to the components due to the long-time overstretching of the flow velocity at the pure water outlet 311 or the concentrated water outlet 331 can be avoided.

Optionally, the second cover plate 32 is disposed opposite the third cover plate 33, and the second cover plate 32 is adjacent to the first cover plate 31. Thus, the problem of dead angles of dirt accumulation can be avoided through linear flow.

Alternatively, both sides of the pure water flow path 12 are sealed by a seal member in a folding direction perpendicular to the membrane 1.

As shown in fig. 4 and 7, the solid arrows are raw water flow paths, and the broken arrows are pure water permeation paths. The gaps between the front surfaces of the folded diaphragms 1 form a second space, the second space is a raw water flow channel, and raw water flows in from one end; in the process of flowing through the whole second space, filtering can occur on the front surface of the membrane 1, and the filtered pure water enters into a first space formed on the back surface of the membrane, wherein the first space is a pure water flow channel; the unfiltered concentrated water flows out from the other end of the raw water inlet.

By sealing both ends of the first space in the direction perpendicular to the folding direction of the diaphragm 1, raw water and concentrated water can be separated from each other, preventing water from being mixed. Preferably, both ends of the first space are sealed by using sealing glue. The sealing glue is adopted for sealing, the adhesive force to the membrane 1 is good, the membrane cannot be opened after encapsulation, the hardness is high, the insulating property is good, and the heat resistance is good.

Optionally, the number of first spaces ranges from [2, 10 ]. Specifically, the number of the first spaces may be 2, 3, 4, 5, 6, 7, 8, 9, 10. Preferably, the number of first spaces is 6 or 7, which can be less costly on the basis of guaranteeing the quality and efficiency of the purified water. Meeting the domestic water demand.

Optionally, the internal pressure of the accommodating chamber is within the range of 0.6,0.9 MPa in the operating state of the water purifier 47. The side of the membrane 1 in the second side direction is sealed. In the working process of the osmotic membrane component, the working pressure of the osmotic membrane component can be kept within the range of 0.6 and 0.9 MPa, and the osmotic purification efficiency is improved.

Alternatively, the water guide 221 includes water guide holes corresponding to the plurality of pure water flow paths 12.

The diversion holes are arranged on the pure water clamp 22 in an array manner, so that pure water flowing through the pure water clamp 22 can flow out uniformly in multiple strands, and the problem of turbulent flow of water is avoided. The distance between the adjacent diversion holes is the sum of the heights of the first space and the second space, and the diversion holes in each row can be opposite to the first space of each layer.

The purification system provided by the embodiments of the present disclosure includes the aforementioned water purifier 47.

During the process of flowing through the second space, impurities in the raw water are filtered by the pure water guide layer 14 of the membrane 1, permeate into the first space from the second space, form pure water, and then flow out through the pure water outlet 311. The unfiltered raw water and impurities form concentrated water, which is discharged from the concentrated water outlet 331 through the second space. Compared with the existing curled filter element, the preparation process is simple and the cost is low; compared with a coiled membrane, the folding membrane 1 has longer effective raw water flow, and improves the water production efficiency.

Optionally, the piping of the purification system comprises a main piping and a branch piping. The main pipeline comprises a front filter element 41, a water inlet valve 42, a water pump 43, a raw water inlet 321 of a water purifier 47, a pure water outlet 311 of the water purifier 47, a rear filter element 44 and a water tap 45 which are sequentially connected; the branch pipeline comprises a concentrated water outlet 331 of the water purifier 47 and a waste water valve 46 which are connected in sequence. Alternatively, the inlet valve 42 includes an inlet solenoid valve or a one-way valve. The purification system using the water purifier 47 in the present application has the advantages of simple manufacturing process, long raw water flow, short pure water flow and high water production efficiency. In addition, the stacked layer assembly in the application is easy to clean and long in service life.

As an example, when a user turns on the tap 45 to make water, the pressure switch detects a pressure decrease, transmitting a signal to the water inlet solenoid valve and the pump; at this time, raw water sequentially passes through a raw water inlet pipe, a pre-filter element 41, a water inlet electromagnetic valve and a booster pump, then enters an RO membrane, and then is divided into two paths: the pure water produced in one path flows out from the pure water outlet 311 of the water flow distributor through the one-way valve, the high-pressure switch, the rear filter element 44 and finally flows out from the pure water outlet pipe; the other way of wastewater is discharged through a concentrated water outlet 331 of the water flow distributor and a wastewater proportional valve.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (9)

1. A water purifier, comprising:

the shell is internally provided with a containing cavity and comprises a raw water inlet, a pure water outlet and a concentrated water outlet; and, a step of, in the first embodiment,

a stack layer assembly including a folded membrane for purifying raw water by unidirectional filtration, the stack layer assembly being positioned in the accommodation chamber and dividing the accommodation chamber into a plurality of pure water flow paths and raw water flow paths;

raw water enters the raw water flow path from the raw water inlet, part of raw water in the raw water flow path enters the pure water flow path through the membrane filtration and is discharged through the pure water outlet, and concentrated water formed by impurities and raw water in the raw water flow path is discharged through the concentrated water outlet.

2. The water purifier of claim 1, wherein the stacking layer assembly further comprises:

the clamp assembly comprises a raw water clamp and a pure water clamp which are connected, wherein the raw water clamp and the pure water clamp enclose a cavity to wrap the whole membrane, and the pure water clamp is provided with a plurality of diversion parts.

3. The water purifier of claim 2, wherein the housing comprises:

the first cover plate is connected with the pure water clamp, and the pure water outlet is formed in the first cover plate;

the second cover plate is connected with one side of the clamp assembly, and the raw water inlet is formed in the second cover plate; and, a step of, in the first embodiment,

and the third cover plate is connected with the other side of the clamp assembly and is provided with the concentrated water outlet.

4. The water purifier according to claim 3, wherein,

the first cover plate, the second cover plate and the third cover plate are all provided with grooves, the membrane is attached to the edges of the grooves, and the notch of the grooves faces the accommodating cavity to form a collecting chamber.

5. The water purifier according to claim 3, wherein,

the second cover plate is arranged opposite to the third cover plate, and the second cover plate is adjacent to the first cover plate.

6. The water purifier of claim 1, wherein the water purifier comprises a water inlet and a water outlet,

in a folding direction perpendicular to the membrane, both sides of the pure water flow path are sealed by a sealing member.

7. The water purifier according to claim 2, wherein,

the diversion part comprises diversion holes, and a plurality of diversion holes correspond to a plurality of pure water flow paths.

8. A purification system, comprising:

the water purifier as recited in any one of claims 1 to 7.

9. The purification system of claim 8, wherein the piping of the purification system comprises:

the main pipeline comprises a front filter element, a water inlet valve, a water pump, a raw water inlet of the water purifier, a pure water outlet of the water purifier, a rear filter element and a water tap which are connected in sequence; and, a step of, in the first embodiment,

the branch pipeline comprises a concentrated water outlet and a waste water valve which are sequentially connected.