Water purification system and water purification equipment

Abstract

The water purification system comprises a water purification module, a front-end purification module and a rear-end purification module, the front-end purification module and the rear-end purification module are communicated with the water purification module, the water purification module comprises a reverse osmosis filter element, and the front-end purification module comprises a front filter unit, a first buffer tank, a water pump and a water purification loop. The front filter unit is communicated with the water inlet side of the reverse osmosis filter element through the first buffer tank and the water pump, the water inlet end of the water purification loop is communicated with the water purification side of the reverse osmosis filter element, and the water outlet end of the water purification loop is communicated with the water inlet end of the front filter unit; the rear-end purification module comprises a rear filter unit and a second buffer tank, and the rear filter unit is communicated with the pure water side of the reverse osmosis filter element through the second buffer tank; the water purification system further comprises a water source connector module, and the water source connector module is communicated with the water purification module, the front-end purification module and the rear-end purification module. The water purification loop is additionally arranged to carry out backflow flushing on the reverse osmosis filter element, so that the surface of the filter membrane of the reverse osmosis filter element is effectively flushed, the situation that concentration polarization easily occurs at the front end of the reverse osmosis filter membrane in the prior art is avoided, the service life of the reverse osmosis membrane is effectively prolonged, and the filtering effect of the reverse osmosis membrane is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of water purifiers, and particularly to a water purification system and a water purification device. Background Art

[0002] As society pays more and more attention to drinking water safety, reverse osmosis water purifiers have gradually become an indispensable household appliance. The reverse osmosis water purifier uses a reverse osmosis filter element provided with a reverse osmosis membrane, and thus filters the water to be purified based on the reverse osmosis principle to produce water with extremely high purity.

[0003] However, since the reverse osmosis filter element mainly filters out solutes at the front end of the reverse osmosis membrane after applying high pressure on the side of the water to be purified, so that pure water flows out from the back end of the reverse osmosis membrane, it is easy to occur concentration polarization at the front end of the reverse osmosis membrane, reducing the service life of the reverse osmosis membrane and affecting the filtration effect.

[0004] The foregoing description is to provide general background information and does not necessarily constitute prior art. Summary of the Utility Model

[0005] In view of the above technical problems, this application provides a water purification system and a water purification device, which can effectively flush the surface of the filter membrane of the reverse osmosis filter element, avoid the situation of easy concentration polarization at the front end of the reverse osmosis filter membrane in the prior art, and effectively improve the service life and filtration effect of the reverse osmosis membrane.

[0006] To solve the above technical problems, this application provides a water purification system, including a water purification module, and a front-end purification module and a back-end purification module respectively communicated with the water purification module. Among them, the water purification module includes a reverse osmosis filter element, the front-end purification module includes a pre-filter unit, a first buffer tank, a water pump and a water purification circuit. The pre-filter unit is communicated with the water inlet side of the reverse osmosis filter element through the first buffer tank and the water pump in sequence. The water inlet end of the water purification circuit is communicated with the purified water side of the reverse osmosis filter element, and the water outlet end of the water purification circuit is communicated with the water inlet end of the pre-filter unit; the back-end purification module includes a post-filter unit and a second buffer tank, and the post-filter unit is communicated with the pure water side of the reverse osmosis filter element through the second buffer tank;

[0007] The water purification system further includes a water source connector module, which is respectively communicated with the water purification module, the front-end purification module and the back-end purification module. The first end of the water source connector module is communicated with the water inlet end of the front-end purification module, the second end of the water source connector module is communicated with the water outlet end of the front-end purification module, the third end of the water source connector module is communicated with the water outlet end of the concentrated water tank, and the fourth end of the water source connector module is communicated with the water outlet end of the back-end purification module.

[0008] Further, in some embodiments of the present application, the front-end purification module further includes a first check valve. The water inlet end of the first check valve is connected to the water outlet end of the pre-filter unit, and the water outlet end of the first check valve is connected to the water inlet end of the first buffer tank. The rear-end purification module further includes a second check valve. The water inlet end of the second check valve is connected to the water outlet end of the second buffer tank, and the water outlet end of the second check valve serves as the pure water outlet.

[0009] Further, in some embodiments of the present application, the purified water circuit includes a third check valve and a purified water pipeline. The purified water pipeline includes a first purified water branch and a second purified water branch. The water inlet end of the third check valve is connected to the purified water side of the reverse osmosis filter element, and the water outlet end of the third check valve is connected to the water inlet ends of the first purified water branch and the second purified water branch. The water outlet end of the first purified water branch is connected to the water inlet end of the pre-filter unit.

[0010] Further, in some embodiments of the present application, the front-end purification module further includes a concentrated water circuit. The water inlet end of the concentrated water circuit is connected to the concentrated water side of the reverse osmosis filter element, and the water outlet end of the concentrated water circuit serves as the concentrated water discharge outlet.

[0011] Further, in some embodiments of the present application, the concentrated water circuit includes a fourth check valve and a concentrated water pipeline. The concentrated water pipeline includes a first concentrated water branch and a second concentrated water branch. The water inlet end of the fourth check valve is connected to the concentrated water side of the reverse osmosis filter element, and the water outlet end of the fourth check valve is connected to the water inlet ends of the first concentrated water branch and the second concentrated water branch. The water outlet end of the first concentrated water branch is connected to the water inlet end of the pre-filter unit.

[0012] Further, in some embodiments of the present application, the concentrated water circuit further includes a fifth check valve and a concentrated water tank. The water inlet end of the fifth check valve is connected to the water outlet end of the second concentrated water branch, and the water outlet end of the fifth check valve is connected to the water inlet end of the concentrated water tank.

[0013] Further, in some embodiments of the present application, the water source connector module includes a first water source branch, a second water source branch, a third water source branch, and a fourth water source branch; the water inlet end of the first water source branch is connected to a faucet, and the water outlet end of the first water source branch is connected to the water inlet end of the pre-filter unit in the front-end purification module; the water inlet end of the second water source branch is connected to the water outlet end of the second water purification branch in the front-end purification module, and the water outlet end of the second water source branch serves as a purified water outlet; the water inlet end of the third water source branch is connected to the water outlet end of the concentrated water tank, and the water outlet end of the third water source branch serves as a concentrated water outlet; the water inlet end of the fourth water source branch is connected to the water outlet end of the second check valve in the rear-end purification module, and the water outlet end of the fourth water source branch serves as a pure water outlet.

[0014] Further, in some embodiments of the present application, the pre-filter unit includes a polypropylene meltblown filter element and / or a pre-activated carbon filter element, and the post-filter unit includes a post-activated carbon filter element and / or a polypropylene meltblown filter element.

[0015] The present application also provides a water purification device including the water purification system as described above.

[0016] Implementing the embodiments of the present application has the following beneficial effects:

[0017] As described above, a water purification system and a water purification device provided by the present application, the water purification system includes a water purification module, and a front-end purification module and a rear-end purification module respectively connected to the water purification module. Among them, the water purification module includes a reverse osmosis filter element, the front-end purification module includes a pre-filter unit, a first buffer tank, a water pump, and a purified water circuit. The pre-filter unit is connected to the water inlet side of the reverse osmosis filter element through the first buffer tank and the water pump in sequence. The water inlet end of the purified water circuit is connected to the purified water side of the reverse osmosis filter element, and the water outlet end of the purified water circuit is connected to the water inlet end of the pre-filter unit; the rear-end purification module includes a post-filter unit and a second buffer tank, and the post-filter unit is connected to the pure water side of the reverse osmosis filter element through the second buffer tank. By providing a water purification system and a water purification device, the present application effectively flushes the filter membrane surface of the reverse osmosis filter element by adding a purified water circuit at the front end of the reverse osmosis filter element, reduces the concentration difference at the front end of the reverse osmosis filter membrane, solves the problem in the prior art that concentration polarization is likely to occur at the front end of the reverse osmosis membrane, resulting in a reduced service life of the reverse osmosis membrane, and improves the service life and filtration effect of the reverse osmosis membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the first implementation manner of the water purification system provided by the embodiments of this application;

[0020] Figure 2 It is a schematic structural diagram of the second implementation manner of the water purification system provided by the embodiments of this application;

[0021] Figure 3 It is a schematic structural diagram of the third implementation manner of the water purification system provided by the embodiments of this application;

[0022] Figure 4 It is a schematic structural diagram of the fourth implementation manner of the water purification system provided by the embodiments of this application;

[0023] Figure 5 It is a schematic structural diagram of the fifth implementation manner of the water purification system provided by the embodiments of this application;

[0024] Figure 6 It is a schematic structural diagram of the sixth implementation manner of the water purification system provided by the embodiments of this application;

[0025] Figure 7 It is a schematic structural diagram of the seventh implementation manner of the water purification system provided by the embodiments of this application;

[0026] Figure 8 It is a schematic structural diagram of the eighth implementation manner of the water purification system provided by the embodiments of this application;

[0027] Figure 9 It is a schematic structural diagram of the ninth implementation manner of the water purification system provided by the embodiments of this application;

[0028] Figure 10 It is a schematic structural diagram of the tenth implementation manner of the water purification system provided by the embodiments of this application;

[0029] Figure 11 It is a schematic structural diagram of the eleventh implementation manner of the water purification system provided by the embodiments of this application;

[0030] Figure 12 It is a schematic structural diagram of the twelfth implementation manner of the water purification system provided by the embodiments of this application;

[0031] Figure 13 It is a schematic structural diagram of the thirteenth implementation manner of the water purification system provided by the embodiments of the present application.

[0032] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Through the above-mentioned accompanying drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0033] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0034] It should be noted that in this document, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanations in the specific embodiments or further in combination with the context of the specific embodiments.

[0035] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] In the subsequent description, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of the description of the present application, and they have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0037] Please refer to Figure 1 , Figure 1It is a schematic structural diagram of the first implementation manner of the water purification system provided by the embodiments of the present application. The water purification system provided by this embodiment may specifically include a water purification module 20, and a front-end purification module 10 and a back-end purification module 30 that are respectively connected to the water purification module 20. Among them, the water purification module 20 includes a reverse osmosis filter element 21. The front-end purification module 10 includes a pre-filtering unit 11, a first buffer tank 12, a water pump 13, and a purified water circuit 14. The pre-filtering unit 11 is connected to the water inlet side of the reverse osmosis filter element 21 through the first buffer tank 12 and the water pump 13 in sequence. The water inlet end of the purified water circuit 14 is connected to the purified water side of the reverse osmosis filter element 21, and the water outlet end of the purified water circuit 14 is connected to the water inlet end of the pre-filtering unit 11. The back-end purification module 30 includes a post-filtering unit 31 and a second buffer tank 32. The post-filtering unit 31 is connected to the pure water side of the reverse osmosis filter element 21 through the second buffer tank 32.

[0038] In addition, the water purification system further includes a water source connector module 40. The water source connector module 40 is respectively connected to the water purification module 20, the front-end purification module 10, and the back-end purification module 30. The first end of the water source connector module 40 is connected to the water inlet end of the front-end purification module 10, the second end of the water source connector module 40 is connected to the water outlet end of the front-end purification module 10, the third end of the water source connector module 40 is connected to the water outlet end of the concentrated water tank, and the fourth end of the water source connector module 40 is connected to the water outlet end of the back-end purification module 30.

[0039] Specifically, as Figure 1 shown, the water purification system provided by this embodiment includes a water purification module 20, and a front-end purification module 10 and a back-end purification module 30 that are respectively connected to the water purification module 20. Among them, one end of the front-end purification module 10 is the raw water inlet end for accessing raw water, and the other end of the front-end purification module 10 is connected to the first end of the water purification module 20 for flowing the raw water purified by the front-end purification module 10 into the water purification module 20 for filtration. The second end of the water purification module 20 serves as the pure water outlet end for flowing out pure water. The third end of the water purification module 20 is connected to the purified water circuit in the front-end purification module 10, and the purified water circuit is also connected to the pre-filtering unit in the front-end purification module 10. The purified water circuit is used to return the purified water flowing out of the water purification module 20 to the front-end purification module 10 to effectively backwash the water purification module 20.

[0040] In a specific embodiment, as Figure 2As shown in the figure, the water purification module 20 provided in this embodiment may specifically include a reverse osmosis filter element 21. The front-end purification module 10 may specifically include a pre-filtering unit 11, a first buffer tank 12, a water pump 13, and a purified water circuit 14. The pre-filtering unit 11 is successively connected to the water inlet side of the reverse osmosis filter element 21 through the first buffer tank 12 and the water pump 13. After the raw water is pre-filtered by the pre-filtering unit 11, it first flows into the first buffer tank 12 for storage, and then flows into the water inlet side of the reverse osmosis filter element 21 through the water pump 13. The water pump is used to provide the water pressure when the raw water flows into the reverse osmosis filter element. The water inlet end of the purified water circuit 14 is connected to the purified water side of the reverse osmosis filter element 21, and the water outlet end of the purified water circuit 14 is connected to the water inlet end of the pre-filtering unit 11. After the raw water is filtered by the reverse osmosis filter element 21, the purified water flows out from the purified water side of the reverse osmosis filter element 21 to the water inlet end of the purified water circuit 14, and then flows out through the purified water circuit 14 to the water inlet end of the pre-filtering unit 11 for subsequent backwashing. The rear-end purification module 30 may specifically include a post-filtering unit 31 and a second buffer tank 32. The post-filtering unit 31 is connected to the pure water side of the reverse osmosis filter element 21 through the second buffer tank 32. After the raw water is filtered by the reverse osmosis filter element 21, the obtained pure water flows out from the pure water side of the reverse osmosis filter element 21 to the water inlet end of the post-filtering unit 31, and is re-filtered by the post-filtering unit 31, and the finally filtered pure water flows into the second buffer tank 32 for storage. In this embodiment, by adding a purified water circuit 14 at the front end of the reverse osmosis filter element 21, the purified water flowing back through the purified water circuit 14 effectively flushes the surface of the filter membrane of the reverse osmosis filter element 21, reducing the concentration difference at the front end of the reverse osmosis filter membrane, and solving the problem in the prior art that concentration polarization is likely to occur at the front end of the reverse osmosis membrane, resulting in a reduced service life of the reverse osmosis membrane.

[0041] Further, in some embodiments, the front-end purification module further includes a first check valve. The water inlet end of the first check valve is connected to the water outlet end of the pre-filtering unit, and the water outlet end of the first check valve is connected to the water inlet end of the first buffer tank. The rear-end purification module further includes a second check valve. The water inlet end of the second check valve is connected to the water outlet end of the second buffer tank, and the water outlet end of the second check valve serves as the pure water outlet.

[0042] Specifically, as Figure 3As shown in the figure, the front-end purification module 10 in this embodiment may specifically further include a first check valve 15. The first check valve 15 is provided between the pre-filter unit 11 and the first buffer tank 12. The water inlet end of the first check valve 15 is connected to the water outlet end of the pre-filter unit 11, and the water outlet end of the first check valve 15 is connected to the water inlet end of the first buffer tank 12. The first check valve 15 is used to control the raw water flowing out of the pre-filter unit 11, and control its inflow into the first buffer tank 12 or stop the inflow. The rear-end purification module 30 may specifically further include a second check valve 33. The second check valve 33 is provided after the second buffer tank 32. The water inlet end of the second check valve 33 is connected to the water outlet end of the second buffer tank 32, and the water outlet end of the second check valve 33 serves as the pure water outlet of the water purification system. The second check valve 33 is used to control the outflow and stop the outflow of pure water.

[0043] Further, in some embodiments, the purified water circuit includes a third check valve and a purified water pipeline. The purified water pipeline includes a first purified water branch and a second purified water branch. The water inlet end of the third check valve is connected to the purified water side of the reverse osmosis filter element, and the water outlet end of the third check valve is connected to the water inlet ends of the first purified water branch and the second purified water branch. The water outlet end of the first purified water branch is connected to the water inlet end of the pre-filter unit.

[0044] Specifically, as Figure 4 shown, the purified water circuit 14 in this embodiment may specifically further include a third check valve 141 and a purified water pipeline 142. The purified water pipeline 142 may specifically include a first purified water branch 142a and a second purified water branch 142b. The water inlet end of the third check valve 141 is connected to the purified water side of the reverse osmosis filter element 21, and the water outlet end of the third check valve 141 is respectively connected to the water inlet ends of the first purified water branch 142a and the second purified water branch 142b. The water outlet end of the first purified water branch 142a is connected to the water inlet end of the pre-filter unit 11, and is used to return the outflowing purified water to the pre-filter unit 11, and return it to the reverse osmosis filter element 21 through the pre-filter unit 11 for flushing. The third check valve 141 is used to control the inflow and stop the inflow of the purified water flowing out of the reverse osmosis filter element 21.

[0045] Further, in some embodiments, the front-end purification module further includes a concentrated water circuit. The water inlet end of the concentrated water circuit is connected to the concentrated water side of the reverse osmosis filter element, and the water outlet end of the concentrated water circuit is connected to the water inlet end of the pre-filter unit.

[0046] Specifically, as Figure 5 shown, the front-end purification module 10 in this embodiment may specifically further include a concentrated water circuit 16. The water inlet end of the concentrated water circuit 16 is connected to the concentrated water side of the reverse osmosis filter element 21, and the water outlet end of the concentrated water circuit 16 serves as the concentrated water discharge outlet of the water purification system. The concentrated water circuit 16 is used to receive the concentrated water flowing out of the reverse osmosis filter element 21 and discharge the concentrated water through the concentrated water circuit 16.

[0047] Further, in some embodiments, the concentrated water circuit includes a fourth check valve and a concentrated water pipe. The concentrated water pipe includes a first concentrated water branch and a second concentrated water branch. The water inlet end of the fourth check valve communicates with the concentrated water side of the reverse osmosis filter element, and the water outlet end of the fourth check valve communicates with the water inlet ends of the first concentrated water branch and the second concentrated water branch. The water outlet end of the first concentrated water branch communicates with the water inlet end of the pre-filter unit.

[0048] Specifically, as Figure 6 shown, the concentrated water circuit 15 in this embodiment may specifically further include a fourth check valve 161 and a concentrated water pipe 162. Among them, the concentrated water pipe 162 may specifically include a first concentrated water branch 162a and a second concentrated water branch 162b. The water inlet end of the fourth check valve 161 communicates with the concentrated water side of the reverse osmosis filter element 21, and the water outlet end of the fourth check valve 161 communicates with the water inlet ends of the first concentrated water branch 162a and the second concentrated water branch 162b. The fourth check valve 161 is used to control the outflow and stop of the concentrated water. The water outlet end of the first concentrated water branch 162a communicates with the water inlet end of the pre-filter unit 11. The first concentrated water branch 162a is used to return the concentrated water flowing out of the reverse osmosis filter element 21 to the pipe before the pre-filter unit 11. The water outlet end of the second concentrated water branch 162b is used as the concentrated water discharge outlet.

[0049] Further, in some embodiments, the concentrated water circuit further includes a fifth check valve and a concentrated water tank. The water inlet end of the fifth check valve communicates with the water outlet end of the second concentrated water branch, and the water outlet end of the fifth check valve communicates with the water inlet end of the concentrated water tank.

[0050] Specifically, as Figure 7 shown, the concentrated water circuit 16 in this embodiment may specifically further include a fifth check valve 163 and a concentrated water tank 164. Among them, the water inlet end of the fifth check valve 163 communicates with the water outlet end of the second concentrated water branch 162b, and the water outlet end of the fifth check valve 163 communicates with the water inlet end of the concentrated water tank 164. The fifth check valve 163 is used to control the outflow and stop of the concentrated water in the second concentrated water branch 162b to the concentrated water tank 164. The concentrated water tank 164 is used to store the concentrated water flowing out of the second concentrated water branch 162b.

[0051] Specifically, as Figure 8As shown in the figure, the water purification system of this embodiment may specifically further include a water source connector module 40. The water source connector module 40 is respectively connected to the water purification module 20, the front-end purification module 10, and the back-end purification module 30. The first end of the water source connector module 40 is connected to the water inlet end of the front-end purification module 10 to provide raw water for the front-end purification module 10. The second end of the water source connector module 40 is connected to the water outlet end of the front-end purification module 10 to receive the purified water flowing out of the front-end purification module 10. The third end of the water source connector module 40 is connected to the water outlet end of the concentrated water tank 164 in the front-end purification module 10 to receive the concentrated water flowing out of the concentrated water tank. The fourth end of the water source connector module 40 is connected to the water outlet end of the back-end purification module 30 to receive the pure water flowing out of the back-end purification module 30.

[0052] Further, in some embodiments, the water source connector module includes a first water source branch, a second water source branch, a third water source branch, and a fourth water source branch; the water inlet end of the first water source branch is connected to a faucet, and the water outlet end of the first water source branch is connected to the water inlet end of the pre-filter unit in the front-end purification module; the water inlet end of the second water source branch is connected to the water outlet end of the second water purification branch in the front-end purification module, and the water outlet end of the second water source branch serves as a purified water outlet; the water inlet end of the third water source branch is connected to the water outlet end of the concentrated water tank, and the water outlet end of the third water source branch serves as a concentrated water outlet; the water inlet end of the fourth water source branch is connected to the water outlet end of the second check valve in the back-end purification module, and the water outlet end of the fourth water source branch serves as a pure water outlet.

[0053] In a specific embodiment, as Figure 9 shown, the water source connector module 40 in this embodiment may specifically include a first water source branch 41, a second water source branch 42, a third water source branch 43, and a fourth water source branch 44; the water inlet end of the first water source branch 41 is connected to a faucet, and the water outlet end of the first water source branch 41 is connected to the water inlet end of the pre-filter unit 11 in the front-end purification module 10. The first water source branch 41 is used for the raw water flowing out of the faucet to flow into the pre-filter unit 11; the water inlet end of the second water source branch 41 is connected to the water outlet end of the second water purification branch 142b in the front-end purification module 10, and the water outlet end of the second water source branch 42 serves as a purified water outlet. The second water source branch 42 is used for the purified water flowing out of the second water purification branch 142b to flow into the purified water outlet for discharge; the water inlet end of the third water source branch 43 is connected to the water outlet end of the concentrated water tank 164, and the water outlet end of the third water source branch 43 serves as a concentrated water outlet. The third water source branch 43 is used for the concentrated water flowing out of the concentrated water tank 164 to flow into the concentrated water outlet for discharge; the water inlet end of the fourth water source branch 44 is connected to the water outlet end of the second check valve 33 in the back-end purification module 30, and the water outlet end of the fourth water source branch 44 serves as a pure water outlet. The fourth water source branch 44 is used for discharging the pure water flowing out of the back-end purification module for the user to drink.

[0054] In the water purification system applying the reverse osmosis filter element in this example, it may further include Figures 10 - 13 the water source connector 7 shown in Figures 10 - 13 . The water source connector 7 can be directly connected to a faucet 8 (or other water source supply ends such as a drain outlet), so that the unpurified water (such as tap water) from the faucet 8 can be directly conveyed to the front-end purification assembly 2 through the water source connector 7, and is purified by the front-end purification assembly 2, the reverse osmosis filter element 1, the rear-end purification assembly 3, etc., and the purified clean water, pure water, etc. are output. Based on the internal structure of the water source connector 7, the embodiments shown in Figures 10 - 13 will be described respectively below.

[0055] As an exemplary embodiment, Figure 10 is a schematic structural diagram of a water purification system shown according to an exemplary embodiment. As shown in Figure 10 Figure 10 , the water source connector 7 in this water purification system may include:

[0056] A first pipeline 7A, including a first end 7A1 communicated with the water inlet faucet 8 and a second end 7A2 communicated with the water inlet pipeline 23 of the front-end purification assembly 2;

[0057] A second pipeline 7B, including a third end 7B1 communicated with the water outlet pipeline 32 of the rear-end purification assembly 3 and a fourth end serving as a pure water outlet 7B2;

[0058] A third pipeline 7C communicated with the clean water output pipeline 4. The third pipeline 7C includes a fifth end serving as a clean water outlet 7C2.

[0059] In this embodiment, through the first pipeline 7A, the unpurified water from the water inlet faucet 8 can be directly output to the front-end purification assembly 2 without the user manually transferring the unpurified water; through the second pipeline 7B, the purified pure water can be directly conveyed to the water source connector 7 and output from the pure water outlet 7B2, making the user similar to directly fetching water from the water inlet faucet 8, which helps to reduce the learning amount of the user; through the third pipeline 7C, the preliminarily purified clean water can be directly conveyed to the water source connector 7 and output from the clean water outlet 7C2, also making the user similar to directly fetching water from the water inlet faucet 8, which helps to improve the user experience.

[0060] As another exemplary embodiment, Figure 11 is a schematic structural diagram of a water purification system shown according to an exemplary embodiment. As shown in Figure 11 Figure 11 , on the basis of the Figure 10 embodiment, that is, in addition to including the first pipeline 7A, the second pipeline 7B, and the third pipeline 7C, the water source connector 7 in this water purification system may further include:

[0061] A fourth pipeline 7D connected to the first pipeline 7A, the fourth pipeline 7D including a sixth end serving as an outlet 7D1 for unpurified water;

[0062] A second valve 62, disposed on the fourth pipeline 7D, closing when the pure water output function is triggered and otherwise remaining open.

[0063] In this embodiment, by adding the fourth pipeline 7D, the user can directly select to output unpurified water from the fourth pipeline 7D without passing through the purification process of the purified water, which can avoid waste of purification resources in some application scenarios with low water quality requirements; at the same time, by adding the second valve 62, the first pipeline 7A and the fourth pipeline 7D can be isolated. Thus, when the pure water output function is triggered, by closing the second valve 62, the unpurified water is output from the second end 7A2 of the first pipeline 7A to the front-end purification assembly 2, and the unpurified water is prevented from being output from the unpurified water outlet 7D1, avoiding waste (when the user enables the pure water output function, water is necessarily received only from the pure water outlet 7B2 and not from the unpurified water outlet 7D1 at the same time, so the water output from the unpurified water outlet 7D1 will cause waste). When the unpurified water output function is triggered, by opening the second valve 62, the user can smoothly receive water from the unpurified water outlet 7D1.

[0064] As another exemplary embodiment, Figure 12 is a schematic structural diagram of a water purifier shown according to an exemplary embodiment, as Figure 12 shown, on the basis of the Figure 11 embodiment, that is, in addition to including the first pipeline 7A, the second pipeline 7B, the third pipeline 7C, the fourth pipeline 7D and the second valve 62, the water source connector 7 in this water purification system may further include:

[0065] A fifth pipeline 7E connected to the fourth pipeline 7D, the fifth pipeline 7E also being connected to the third pipeline 7C;

[0066] A third valve 63, located on the fifth pipeline 7E, closing when the unpurified water output function or the purified water output function is triggered and opening when both the unpurified water output function and the purified water output function are triggered;

[0067] A fourth valve 64, located on the pipeline between the end where the fifth pipeline 7E is connected to the third pipeline 7C and the purified water outlet 7C2, opening when the purified water output function is triggered and closing when both the unpurified water output function and the purified water output function are triggered;

[0068] wherein, the second valve 62 is disposed on the pipeline between the end where the fourth pipeline 7D is connected to the first pipeline 7A and the end where the fifth pipeline 7E is connected to the fourth pipeline 7D.

[0069] In this embodiment, similar to Figure 11 , a second valve 62 can be provided on the fourth pipeline 7D. Thus, when the second valve 62 is opened, the output of untreated water can be realized, and when the second valve 62 is closed, the untreated water is conveyed to the front-end purification assembly 2 through the first pipeline 7A, and the output of pure water is realized through the second pipeline 7B. In addition, the following can also be achieved through the third valve 63 and the fourth valve 64: when the third valve 63 is closed, if the second valve 62 is opened, the untreated water can be separately output from the untreated water outlet 7D1, and if the fourth valve 64 is opened, the purified water can be separately output from the purified water outlet 7C2; when the second valve 62 is opened, the third valve 63 is opened, and the fourth valve 64 is closed, a mixed water of untreated water and purified water can be output from the untreated water outlet 7D1.

[0070] Furthermore, in some embodiments, the water source connector module further includes:

[0071] a sixth pipeline communicating with the first pipeline, and the sixth pipeline also communicates with the third pipeline;

[0072] a fifth valve, located on the sixth pipeline, closing when the pure water output function or the purified water output function is triggered, and otherwise remaining open.

[0073] As another exemplary embodiment, Figure 13 is a schematic structural diagram of a water purifier shown according to an exemplary embodiment. As shown in Figure 13 , on the basis of the Figure 10 embodiment, that is, in addition to including the first pipeline 7A, the second pipeline 7B, and the third pipeline 7C, the water source connector 7 in this water purifier may further include:

[0074] a sixth pipeline 7F communicating with the first pipeline 7A, and this sixth pipeline 7F also communicates with the third pipeline 7C;

[0075] a fifth valve 65, located on the sixth pipeline 7F, closing when the pure water output function or the purified water output function is triggered, and otherwise remaining open.

[0076] In this embodiment, the first pipeline 7A and the third pipeline 7C are connected through the sixth pipeline 7F, so that the purified water outlet 7C2 can be used to separately output untreated water or purified water. Among them, when the untreated water output function is triggered, the fifth valve 65 switches to the open state to ensure that the untreated water in the sixth pipeline 7F is output from the purified water outlet 7C2; when the purified water output function is

[0077] When triggered, the fifth valve 65 switches to the closed state to ensure the isolation of the unpurified water and the purified water, and enables the purified water in the third pipeline 7C to be output from the purified water outlet 7C2; when the pure water output function is triggered, the fifth valve 65 switches to the closed state to ensure that when the pure water is output from the pure water outlet 7B2, the unpurified water is prevented from being output from the purified water outlet 7C2.

[0078] Through the filtering effect of the reverse osmosis membrane, although the reverse osmosis filter element 1 can filter the purified water input from the purified water inlet 11 to obtain pure water, in some scenarios, if not all of the purified water can be filtered to the rear end of the reverse osmosis membrane to become pure water, it will cause water to remain at the front end of the reverse osmosis membrane, that is, "concentrate water". Therefore, in the water purification system, corresponding pipelines can also be set to output the concentrate water from the reverse osmosis filter element 1.

[0079] Furthermore, in some embodiments, the pre-filter unit may specifically include a polypropylene melt-blown filter element and / or a pre-activated carbon filter element, and the post-filter unit may specifically include a post-activated carbon filter element and / or a polypropylene melt-blown filter element.

[0080] In summary, the water purification system provided in this embodiment includes a water purification module, and a front-end purification module and a rear-end purification module respectively connected to the water purification module. Among them, the water purification module includes a reverse osmosis filter element, the front-end purification module includes a pre-filter unit, a first buffer tank, a water pump and a purified water circuit. The pre-filter unit is connected to the water inlet side of the reverse osmosis filter element through the first buffer tank and the water pump in sequence. The water inlet end of the purified water circuit is connected to the purified water side of the reverse osmosis filter element, and the water outlet end of the purified water circuit is connected to the water inlet end of the pre-filter unit; the rear-end purification module includes a post-filter unit and a second buffer tank, and the post-filter unit is connected to the pure water side of the reverse osmosis filter element through the second buffer tank. In this embodiment, by adding a purified water circuit in front of the reverse osmosis filter element, the purified water flowing back through the purified water circuit effectively flushes the surface of the filter membrane of the reverse osmosis filter element, reduces the concentration difference at the front end of the reverse osmosis filter membrane, solves the problem in the prior art that concentration polarization is likely to occur at the front end of the reverse osmosis membrane, resulting in a reduction in the service life of the reverse osmosis membrane, and improves the service life and filtering effect of the reverse osmosis membrane.

[0081] The embodiment of the present application also provides a water purification device, including the water purification system described above.

[0082] That is, the above description is only the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, such as the mutual combination of technical features in each embodiment, or directly or indirectly applied in other related technical fields, is equally included in the patent protection scope of the present application.

[0083] In addition, for structural elements with the same or similar characteristics, the present application may use the same or different reference numerals for identification. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0084] In the present application, the term "for example" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "for example" in the present application is not necessarily to be construed as more preferred or more advantageous than other embodiments. The above description is given to enable any person skilled in the art to implement and use the present application. In the above description, various details are set forth for purposes of explanation.

[0085] It should be understood that those of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other embodiments, well-known structures and processes will not be elaborated in detail so as not to obscure the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

Claims

1. A water purification system, characterized in that, It includes a water purification module, as well as a front-end purification module and a back-end purification module that are respectively connected to the water purification module. Among them, the water purification module includes a reverse osmosis filter element. The front-end purification module includes a pre-filter unit, a first buffer tank, a water pump, and a purified water circuit. The pre-filter unit is connected to the water inlet side of the reverse osmosis filter element through the first buffer tank and the water pump in sequence. The water inlet end of the purified water circuit is connected to the purified water side of the reverse osmosis filter element, and the water outlet end of the purified water circuit is connected to the water inlet end of the pre-filter unit; The back-end purification module includes a post-filter unit and a second buffer tank, and the post-filter unit is connected to the pure water side of the reverse osmosis filter element through the second buffer tank; The water purification system further includes a water source connector module. The water source connector module is respectively connected to the water purification module, the front-end purification module, and the back-end purification module. The first end of the water source connector module is connected to the water inlet end of the front-end purification module, the second end of the water source connector module is connected to the water outlet end of the front-end purification module, the third end of the water source connector module is connected to the water outlet end of the concentrated water tank, and the fourth end of the water source connector module is connected to the water outlet end of the back-end purification module.

2. The water purification system according to claim 1, characterized in that The front-end purification module further includes a first check valve. The water inlet end of the first check valve is connected to the water outlet end of the pre-filter unit, and the water outlet end of the first check valve is connected to the water inlet end of the first buffer tank; The back-end purification module further includes a second check valve. The water inlet end of the second check valve is connected to the water outlet end of the second buffer tank, and the water outlet end of the second check valve serves as the pure water outlet.

3. The water purification system according to claim 1, characterized in that, The purified water circuit includes a third check valve and a purified water pipeline. The purified water pipeline includes a first purified water branch and a second purified water branch. The water inlet end of the third check valve is connected to the purified water side of the reverse osmosis filter element, and the water outlet end of the third check valve is connected to the water inlet ends of the first purified water branch and the second purified water branch. The water outlet end of the first purified water branch is connected to the water inlet end of the pre-filter unit.

4. The water purification system according to claim 1, characterized in that, The front-end purification module further includes a concentrated water circuit. The water inlet end of the concentrated water circuit is connected to the concentrated water side of the reverse osmosis filter element, and the water outlet end of the concentrated water circuit serves as the concentrated water discharge outlet.

5. The water purification system according to claim 4, wherein The concentrated water circuit includes a fourth check valve and a concentrated water pipeline. The concentrated water pipeline includes a first concentrated water branch and a second concentrated water branch. The water inlet end of the fourth check valve is connected to the concentrated water side of the reverse osmosis filter element, and the water outlet end of the fourth check valve is connected to the water inlet ends of the first concentrated water branch and the second concentrated water branch. The water outlet end of the first concentrated water branch serves as the concentrated water discharge outlet.

6. The water purification system according to claim 5, characterized in that The concentrated water circuit further includes a fifth check valve and a concentrated water tank. The water inlet end of the fifth check valve is connected to the water outlet end of the second concentrated water branch, and the water outlet end of the fifth check valve is connected to the water inlet end of the concentrated water tank.

7. The water purification system according to any one of claims 1-6, characterized in that, The water source connector module includes a first water source branch, a second water source branch, a third water source branch, and a fourth water source branch; the water inlet end of the first water source branch is connected to a faucet, and the water outlet end of the first water source branch is connected to the water inlet end of the pre-filter unit in the front-end purification module; the water inlet end of the second water source branch is connected to the water outlet end of the second water purification branch in the front-end purification module, and the water outlet end of the second water source branch serves as a purified water outlet; the water inlet end of the third water source branch is connected to the water outlet end of the concentrated water tank, and the water outlet end of the third water source branch serves as a concentrated water outlet; the water inlet end of the fourth water source branch is connected to the water outlet end of the second check valve in the rear-end purification module, and the water outlet end of the fourth water source branch serves as a pure water outlet.

8. The water purification system according to claim 1, wherein The pre-filter unit includes a polypropylene meltblown filter element and / or a pre-activated carbon filter element.

9. The water purification system according to claim 1, wherein, The post-filter unit includes a post-activated carbon filter element and / or a polypropylene meltblown filter element.

10. A water purification device, characterized in that, It includes the water purification system according to any one of claims 1-9.

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