Reverse osmosis filter assembly and water purification system
By introducing a backwash water path and a one-way valve control into the reverse osmosis filter system, the problems of difficulty in replacing concentrated water and waste of water resources in reverse osmosis filter cartridges are solved, achieving efficient purification and water saving effects.
Patent Information
- Application Number
- CN202422901850.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing reverse osmosis filter cartridges have problems such as difficulty in replacing concentrate and waste of water resources. The resistance of pure water reflux is high, making it difficult to completely replace concentrate, and a large amount of pure water is required.
By setting up a backwash water path, pure water flows from the pure water passage upstream of the reverse osmosis filter element to flush the filter element. The one-way valve controls the water pressure difference to achieve efficient flushing, reducing flow resistance and pure water consumption.
It achieves efficient flushing of the reverse osmosis filter cartridge, thoroughly removes concentrated water, reduces the TDS value of the first cup of water, and significantly reduces the consumption of pure water.
Smart Images
Figure CN223873732U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of reverse osmosis filter assemblies and water purification system, belong to the technical field of kitchen appliances. BACKGROUND
[0002] With the attention to drinking water safety, reverse osmosis water purifier or water purification system gradually becomes indispensable household appliance product in family. Wherein reverse osmosis filter assembly in water making, utilize the reverse osmosis principle, under the action of additional pressure, water molecules pass through the membrane of reverse osmosis filter core and enter the pure water side, and salt ions are intercepted in the concentrated water side. When standing, faucet closure leads to pure water side sealing, pure water in pure water side cannot penetrate back to concentrated water side, and salt ions slowly diffuse to pure water side, leading to the increase of TDS value in pure water side;When using again, these high TDS value pure water is discharged, which will affect people's drinking water health.
[0003] Currently in prior art, reverse osmosis filter assembly usually adopts the way of pure water backflow into reverse osmosis filter core to replace the water quality containing large particles in reverse osmosis filter core, that is, raw water and concentrated water, so as to greatly reduce the TDS value of first cup water. However, when pure water backflows, it needs to pass through multiple reverse osmosis membranes of reverse osmosis filter core, and the backflow resistance is large, which makes it difficult for pure water to completely replace concentrated water, so that large particle impurities remain in reverse osmosis filter core, on the other hand, a large amount of pure water is needed for backflow in this flushing mode, and generally the volume of reverse osmosis filter core is about 800 mL, and about 2 L of pure water is needed to basically replace the concentrated water in reverse osmosis filter core, leading to the waste of water resources. SUMMARY
[0004] The technical problem to be solved by the present application is to provide a kind of reverse osmosis filter assembly and water purification system, which purifies reverse osmosis filter core by flushing, reduces the difficulty of replacing concentrated water and saves water.
[0005] The present application is realized by the following technical solutions.
[0006] A kind of reverse osmosis filter assembly, comprising: filter container with raw water port, pure water port and concentrated water port, the filter container is formed with raw water passage connected with the raw water port, pure water passage connected with the pure water port and concentrated water passage connected with the concentrated water port;
[0007] The raw water passage is provided with reverse osmosis filter core, so that raw water in the reverse osmosis filter core flows to generate pure water in the pure water passage by reverse osmosis, and flows to generate concentrated water in the concentrated water passage by raw water passage;
[0008] The pure water passage and the raw water passage are connected with a backflush water passage which can be blocked or communicated, the backflush water passage is connected at the raw water passage upstream of the reverse osmosis filter element, and when the backflush water passage is communicated, the pure water in the pure water passage is allowed to flow into the raw water passage, and the reverse osmosis filter element is flushed.
[0009] As a further improvement of the present application, the backflush water passage is provided with a check valve which defines the flow from the pure water passage to the raw water passage, the check valve is set with a pressure difference threshold, and the check valve is opened when the water pressure difference between the pure water passage and the raw water passage reaches the pressure difference threshold, and the check valve is closed when the water pressure difference between the pure water passage and the raw water passage does not reach the pressure difference threshold.
[0010] As a further improvement of the present application, the filter container comprises a filter bottle in which the reverse osmosis filter element is arranged, and a filter element seat arranged on the filter bottle, the raw water inlet, the pure water outlet and the concentrated water outlet are arranged on the filter element seat, and the filter element seat is provided with a raw water pipeline which communicates with the raw water inlet and constitutes part of the raw water passage, a pure water pipeline which communicates with the pure water outlet and constitutes part of the pure water passage, and a concentrated water pipeline which communicates with the concentrated water outlet and constitutes part of the concentrated water passage.
[0011] As a further improvement of the present application, the backflush water passage connects the pure water pipeline and the raw water pipeline.
[0012] As a further improvement of the present application, the filter bottle is provided with a central pipe having a water passage hole, the central pipe constitutes part of the pure water passage and communicates with the pure water pipeline, the reverse osmosis filter element is sleeved outside the central pipe, the reverse osmosis filter element constitutes part of the raw water passage and communicates with the raw water pipeline, and a gap is formed between the reverse osmosis filter element and the inner wall of the filter bottle, the gap constitutes part of the concentrated water passage and communicates with the concentrated water pipeline.
[0013] A water purification system comprises:
[0014] a reverse osmosis filter assembly;
[0015] a raw water pipeline for inputting raw water to the reverse osmosis filter assembly, the raw water pipeline is provided with a raw water inlet valve and a booster pump;
[0016] a concentrated water pipeline for discharging concentrated water output by the reverse osmosis filter assembly, the concentrated water pipeline is provided with a concentrated water outlet valve;
[0017] The normal-temperature water pipe and the water storage pipe are arranged in parallel and used for discharging the pure water output by the reverse osmosis filtering assembly; the normal-temperature water pipe is provided with a normal-temperature water outlet valve; the water storage pipe is provided with a water storage valve and a water storage tank, and the water storage tank is used for storing the pure water output by the reverse osmosis filtering assembly, the output of the pure water being controlled by a flow control pump and the pure water being provided to the hot water pipe and the backwashing pipe;
[0018] The hot water pipe is provided with a heating pipe and used for discharging hot water; the backwashing pipe is provided with a pure water backflow valve and used for inputting pure water to the reverse osmosis filtering assembly to flush the reverse osmosis filter element.
[0019] As a further improvement of the present application, it further comprises:
[0020] A pre-filter element is arranged in the raw water pipe and used for pre-filtering the raw water in the raw water pipe.
[0021] A pure water pipe is arranged in parallel with the backwashing pipe and used for outputting the pure water generated by the reverse osmosis filtering assembly.
[0022] A post-filter element is arranged in the pure water pipe and used for post-filtering the pure water in the pure water pipe and conveying the post-filtered pure water to the normal-temperature water pipe and the water storage pipe.
[0023] As a further improvement of the present application, the pre-filter element and the post-filter element are combined into a composite filter element.
[0024] As a further improvement of the present application, the water storage tank is connected with a water discharge pipe, the hot water pipe and the backwashing pipe are connected in parallel with the water discharge pipe, and the water discharge pipe is provided with the flow control pump and a flow meter.
[0025] As a further improvement of the present application, the water storage tank is provided with a water level monitoring mechanism and used for detecting the pure water storage in the water storage tank.
[0026] The present application has the following beneficial effects:
[0027] When the backwashing water path is communicated, the pure water in the pure water path is allowed to flow into the raw water path through the backwashing water path and flush the reverse osmosis filter element in the raw water path, and the flushing effect can flush and replace all the concentrated water in the reverse osmosis filter element, so that the reverse osmosis filter element does not contain larger molecules and particles such as solid, inorganic salt, organic matter, colloid, bacteria and virus, thereby greatly reducing the TDS value of the first cup of water when the user takes water.
[0028] The pure water is not introduced into the reverse osmosis filter element through backflow, but is introduced into the upstream of the reverse osmosis filter element through the water backflushing path, and the pure water flushes the reverse osmosis filter element along the original flow direction of the raw water, so that the flow resistance of the pure water subjected to backflushing is greatly reduced compared with the prior art, the flushing efficiency is improved, the reverse osmosis filter element can be completely covered and flushed, and the consumption of the pure water can be greatly reduced compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS
[0029] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so as to help understand the purposes and advantages of the present application, in which:
[0030] Figure 1 FIG. 1 is a schematic view of a reverse osmosis filtration assembly according to an embodiment of the present application;
[0031] Figure 2 FIG. 2 is a schematic view of a filter element seat according to an embodiment of the present application;
[0032] Figure 3 FIG. 3 is a schematic view of a purification system according to an embodiment of the present application. DETAILED DESCRIPTION
[0033] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.
[0034] In this specification, the orientation terms such as up, down, left, right, front, back, front surface, back surface, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, and the words "inner" and "outer" respectively refer to the directions toward or away from the geometric center of a particular component, which are relative concepts, so they can change accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.
[0035] A reverse osmosis filtration assembly, referring to Figure 1 and Figure 2 , comprises a filter container 1, the filter container 1 has a raw water port h1, a pure water port h2 and a concentrated water port h3, and the filter container 1 has a raw water passage r1, a pure water passage r2 and a concentrated water passage r3. Among them, the raw water passage r1 and the raw water port h1 are communicated, the raw water is input into the filter container 1 through the raw water port h1, the raw water flows along the raw water passage r1, the pure water passage r2 and the pure water port h2 are communicated, the pure water in the filter container 1 flows along the pure water passage r2, and the filter container 1 is output by the pure water port h2, the concentrated water passage r3 and the pure water port h2 are communicated, the concentrated water in the filter container 1 flows along the concentrated water passage r3, and the filter container 1 is output by the concentrated water port h3.
[0036] The raw water passage r1 is provided with a reverse osmosis filter core 13, which is also called an RO reverse osmosis pure water machine filter core. The reverse osmosis filter core 13 utilizes the principle of reverse osmosis technology. When water passes through a reverse osmosis membrane under the action of a certain pressure, water molecules can pass through, while most of the dissolved solids, inorganic salts, organic matter, colloids, bacteria, viruses and other larger molecules and particles cannot pass through and are blocked and discharged with concentrated water. Therefore, the reverse osmosis filter core 13 can filter raw water to form pure water and concentrated water. In the present embodiment, the raw water passes through the reverse osmosis filter core 13 to generate pure water entering the pure water passage r2 and concentrated water entering the concentrated water passage r3. In the filter container 1, the pure water passage r2 and the concentrated water passage r3 are connected in parallel to the raw water passage r1.
[0037] In the present embodiment, the pure water passage r2 and the raw water passage r1 are connected with a backflush water passage r4, which is connected to the raw water passage r1 upstream of the reverse osmosis filter core 13. The backflush water passage r4 can be blocked or connected. When the backflush water passage r4 is blocked, the flow of pure water in the pure water passage r2 and the flow of raw water in the raw water passage r1 do not interfere with each other. When the backflush water passage r4 is connected, it allows the pure water in the pure water passage r2 to flow into the raw water passage r1 through the backflush water passage r4, and flushes the reverse osmosis filter core 13 in the raw water passage r1. The flushing action can completely flush and replace the concentrated water in the reverse osmosis filter core 13, so that the reverse osmosis filter core 13 does not contain larger molecules and particles such as solids, inorganic salts, organic matter, colloids, bacteria and viruses. Therefore, the first cup of water taken by the user has a significantly reduced TDS value.
[0038] When backwashing is needed, the backwashing water path is connected, and the pure water in the pure water path r2 flows into the raw water path r1 upstream of the reverse osmosis filter core 13 through the backwashing water path r4, so that the pure water can flow into the reverse osmosis filter core 13 from the water inlet end and flow out from the water outlet end, thereby being able to fully cover the reverse osmosis filter core 13 and improve the cleanliness of the flushing of the reverse osmosis filter core 13, thereby avoiding the presence of macromolecules and particles in the reverse osmosis filter core 13. In addition, in the prior art, backwashing is performed by returning pure water to the reverse osmosis filter core 13, and the reverse osmosis filter core 13 is structurally composed of multiple layers of reverse osmosis membranes. Whether it is raw water filtration or pure water return, water is passed through the multiple layers of reverse osmosis membranes to achieve the filtration, and a large water pressure difference needs to be created to make the raw water permeate through the membranes. However, it is difficult to provide a large water pressure difference during backwashing, so that the permeation of pure water into the reverse osmosis filter core 13 is relatively low, and due to the high difficulty of permeation, a large amount of pure water needs to be consumed for reverse osmosis. In the present embodiment, since the pure water is not returned to the reverse osmosis filter core 13, but is introduced into the upstream of the reverse osmosis filter core 13 through the backwashing water path r4, the pure water flows along the original flow direction of the raw water to flush the reverse osmosis filter core 13, so that the flow resistance of the pure water during backwashing is greatly reduced compared to the prior art, not only improving the flushing efficiency, but also completely covering the reverse osmosis filter core 13 for flushing, and the consumption of pure water is also greatly reduced compared to the prior art.
[0039] In the present embodiment, the backwashing water path r4 is provided with a one-way valve 16, which limits the flow from the pure water path r2 to the raw water path r1. The one-way valve 16 is set with a pressure difference threshold, and the one-way valve 16 opens when the water pressure difference between the pure water path r2 and the raw water path r1 reaches the pressure difference threshold, and closes when the water pressure difference between the pure water path r2 and the raw water path r1 does not reach the pressure difference threshold. Generally, when the raw water inlet h1 stops inputting raw water, the pure water outlet h2 stops outputting pure water, and the concentrated water outlet h3 maintains outputting concentrated water, the water pressure difference between the pure water path r2 and the raw water path r1 can reach the pressure difference threshold, so that the one-way valve 16 opens to enter the backwashing state. It should be noted that the pure water path r2 in the water storage state not only can reach the pressure difference threshold to open the one-way valve 16, but also can provide sufficient pure water to flow into the raw water path r1 through the backwashing water path r4 to flush the reverse osmosis filter core 13, thereby further optimizing the effect and efficiency of backwashing.
[0040] For the specific structural composition of the filter container 1, in the present embodiment, the filter container 1 comprises a filter bottle 11 and a filter core seat 12. The filter bottle 11 is a structure with an opening and a hollow interior, a reverse osmosis filter core 13 is arranged in the filter bottle 11, and the filter core seat 12 is arranged at the opening of the filter bottle 11, thereby forming a sealed structure with the filter bottle 11. The raw water port h1, the pure water port h2, and the concentrated water port h3 are all arranged on the filter core seat 12. The filter core seat 12 is provided with a raw water pipeline 121, a pure water pipeline 122, and a concentrated water pipeline 123. The raw water pipeline 121 is in communication with the raw water port h1 and constitutes part of a raw water passage r1, and the other part of the raw water passage r1 is located in the filter bottle 11. The pure water pipeline 122 is in communication with the pure water port h2 and constitutes part of a pure water passage r2, and the other part of the pure water passage r2 is located in the filter bottle 11. The concentrated water pipeline 123 is in communication with the concentrated water port h3 and constitutes part of a concentrated water passage r3, and the other part of the concentrated water passage r3 is located in the filter bottle 11.
[0041] In the present embodiment, a backflushing water passage r4 is arranged in the filter core seat 12 and connects the pure water pipeline 122 and the raw water pipeline 121, and the reverse osmosis filter core 13 is arranged in the filter bottle 11, so that the pure water of the backflushing water passage r4 flows into the upstream of the reverse osmosis filter core 13, thereby enabling the pure water to flush the reverse osmosis filter core 13.
[0042] In the present embodiment, a central pipe 14 is arranged in the filter bottle 11, the central pipe 14 is located at the center of the filter bottle 11, the pipe wall of the central pipe 14 has a plurality of water passing holes 141, which enable water to flow from the periphery of the central pipe 14 into the central pipe 14 through the water passing holes 141, the central pipe 14 constitutes the other part of the pure water passage r2 and is in communication with the pure water pipeline 122, so the central pipe 14 and the pure water pipeline 122 constitute a complete pure water passage r2. The reverse osmosis filter core 13 is annularly arranged outside the central pipe 14, the reverse osmosis filter core 13 constitutes the other part of the raw water passage r1 and is in communication with the raw water pipeline 121, so the reverse osmosis filter core 13 and the raw water pipeline 121 constitute a complete raw water passage r1. The gap 15 between the reverse osmosis filter core 13 and the inner wall of the filter bottle 11 is annular and constitutes the other part of the concentrated water passage r3 and is in communication with the concentrated water pipeline 123, so the annular gap 15 and the concentrated water pipeline 123 constitute a complete concentrated water passage r3.
[0043] In the embodiment, the filter core seat 12 is arranged at the top end of the filter bottle 11, the central tube 14 is arranged vertically, raw water enters from the raw water inlet h1, flows along the raw water pipeline 121 into the reverse osmosis filter core 13, a part of the raw water in the reverse osmosis filter core 13 is subjected to reverse osmosis, the pure water subjected to reverse osmosis flows into the central tube 14 through the water passage 141, flows along the central tube 14 upwardly and into the pure water pipeline 122, and is finally output from the pure water outlet h2, and the other part of the raw water in the reverse osmosis filter core 13 forms concentrated water after flowing through the reverse osmosis filter core 13, flows along the gap 15 upwardly and into the concentrated water pipeline 123, and is finally output from the concentrated water outlet h3.
[0044] Embodiment 2
[0045] A water purification system, with reference to Figure 3 and in combination Figure 1 and Figure 2 , comprising a reverse osmosis filter assembly 1, a raw water pipeline t1, a concentrated water pipeline t2, a normal temperature water pipeline t3, a storage water pipeline t4, a hot water pipeline t5 and a backwashing pipeline t6. Wherein, the reverse osmosis filter assembly 1 is as shown in the embodiment 1, the raw water pipeline t1 is used for inputting raw water into the reverse osmosis filter assembly 1; the raw water pipeline t1 is provided with a raw water inlet valve v1 for controlling the output of the raw water, and the raw water pipeline t1 is provided with a booster pump p1 for increasing the flow rate; the concentrated water pipeline t2 is used for discharging the concentrated water output from the reverse osmosis filter assembly 1, and the concentrated water pipeline t2 is provided with a concentrated water outlet valve v2 for controlling the output of the concentrated water; the normal temperature water pipeline t3 and the storage water pipeline t4 are arranged in parallel and used for discharging the pure water output from the reverse osmosis filter assembly 1; the normal temperature water pipeline t3 is provided with a normal temperature outlet valve v3 for controlling the output of the normal temperature pure water; the storage water pipeline t4 is provided with a storage water valve v4 for controlling the output of the pure water, and the storage water pipeline t4 is provided with a storage water tank m for storing the pure water; the output of the pure water from the storage water tank m is controlled by a flow control pump p2, and the pure water is provided to the hot water pipeline t5 and the backwashing pipeline t6; the hot water pipeline t5 is provided with a heating tube c and a hot water valve v6, and the pure water in the hot water pipeline t5 is output as hot water after being heated by the heating tube c; the backwashing pipeline t6 is provided with a pure water backflow valve v5 and used for inputting pure water into the reverse osmosis filter assembly 1 to flush the reverse osmosis filter core.
[0046] In the embodiment, the storage water tank m is arranged to store the pure water, and the stored pure water has two functions, one is to serve as a water source to output hot water, and the other is to serve as a water source to backwash the reverse osmosis filter assembly 1 when the reverse osmosis filter assembly 1 needs to be purified. When backwashing is needed, the pure water is backflowed into the reverse osmosis filter assembly 1 through the backwashing pipeline t6, the pure water enters the pure water passage to increase the water pressure of the pure water passage, and when the pure water passage and the raw water passage reach a pressure difference threshold, a one-way valve is opened to enable the pure water to flush the reverse osmosis filter core.
[0047] The water purification system of the embodiment further comprises a pre-filter f1, a post-filter f2 and a purified water pipe t7. The pre-filter f1 is arranged on the raw water pipe t1 and used for pre-filtering the raw water in the raw water pipe t1. The pre-filtered raw water is then delivered to the reverse osmosis filter assembly 1 for filtration. The purified water pipe t7 is connected to the reverse osmosis filter assembly 1 and the post-filter f2. The purified water pipe t7 delivers the purified water output by the reverse osmosis filter assembly 1 to the post-filter f2. The post-filter f2 post-filters the purified water. The normal temperature water pipe t3 and the water storage pipe t4 are connected in parallel to the post-filter f2.
[0048] The pre-filter f1 is arranged to remove larger impurities in the water, such as sand, rust, algae and other visible particulate matter. The pre-filtering can effectively protect the reverse osmosis filter assembly 1 from the influence of large particulate impurities, prolong the service life of the entire water purification system. The post-filter f2 is responsible for intercepting finer contaminants in the purified water, including bacteria, viruses, heavy metal ions and other small molecular substances harmful to the human body. In addition to further purifying the water quality, the activated carbon or other special materials in the post-filter f2 can also remove the color and odor in the water, making the purified water clearer and better in taste.
[0049] In the embodiment, the pre-filter f1 and the post-filter f2 are combined into a composite filter f. Combining the pre-filter f1 and the post-filter f2 into the composite filter f can simplify the overall structure, simplify the pipeline layout and optimize the space required by the water purification system.
[0050] In the embodiment, the water storage tank m is connected to a water discharge pipe t8. The hot water pipe t5 and the backwashing pipe t6 are connected in parallel to the water discharge pipe t8. The water discharge pipe t8 is provided with a flow control pump p2 and a flow meter d. The flow meter d can accurately control the output of hot water and the amount of purified water required for backwashing.
[0051] In the embodiment, the water storage tank m is provided with a water level monitoring mechanism (not shown in the figure). When the water level in the tank reaches the minimum threshold, the water storage mode is started to store water. When the water level in the tank reaches the maximum threshold, the backwashing mode is started. The backwashing mode is also started after the user stops taking normal temperature water to ensure the TDS value of the first cup of water.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. These modifications or replacements do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A reverse osmosis filtration assembly, characterized by, include: A filter container having a raw water inlet, a pure water inlet, and a concentrated water inlet, wherein a raw water passage is formed inside the filter container, a pure water passage is formed inside the raw water inlet, a pure water passage is formed inside the pure water inlet, and a concentrated water passage is formed inside the concentrated water inlet. The raw water passage is equipped with a reverse osmosis filter element, so that the raw water flows through the reverse osmosis filter element to generate pure water that enters the pure water passage, and flows through the raw water passage to generate concentrated water that enters the concentrated water passage. The pure water passage and the raw water passage are connected by a backwash water passage that can be blocked or connected. The backwash water passage is connected upstream of the reverse osmosis filter element in the raw water passage. When the backwash water passage is connected, pure water from the pure water passage is allowed to flow into the raw water passage and flush the reverse osmosis filter element.
2. The reverse osmosis filtration assembly of claim 1, wherein, The backwash water path is equipped with a one-way valve that limits the flow from the pure water path to the raw water path. The one-way valve is set with a pressure difference threshold. When the water pressure difference between the pure water path and the raw water path reaches the pressure difference threshold, the one-way valve opens. When the water pressure difference between the pure water path and the raw water path does not reach the pressure difference threshold, the one-way valve closes.
3. The reverse osmosis filtration assembly of claim 1, wherein, The filtration container includes a filter bottle with the reverse osmosis filter element inside and a filter element seat on the filter bottle; the raw water inlet, the pure water inlet and the concentrated water inlet are all located on the filter element seat; the filter element seat is provided with a raw water pipe that connects to the raw water inlet and forms part of the raw water passage, a pure water pipe that connects to the pure water inlet and forms part of the pure water passage, and a concentrated water pipe that connects to the concentrated water inlet and forms part of the concentrated water passage.
4. The reverse osmosis filtration assembly of claim 3, wherein, The backwash water path connects the pure water pipe and the raw water pipe.
5. The reverse osmosis filtration assembly of claim 3, wherein, The filter bottle is provided with a central tube having water passage holes. The central tube forms part of the pure water passage and is connected to the pure water pipe. The reverse osmosis filter element is sleeved outside the central tube. The reverse osmosis filter element forms part of the raw water passage and is connected to the raw water pipe. There is a gap between the reverse osmosis filter element and the inner wall of the filter bottle. The gap forms part of the concentrate passage and is connected to the concentrate pipe.
6. A water purification system characterized by, include: Reverse osmosis filtration assembly according to any one of claims 1-5; A raw water pipe is used to input raw water into the reverse osmosis filtration assembly. The raw water pipe is equipped with a raw water inlet valve and a booster pump. A concentrate pipe is used to discharge the concentrate output from the reverse osmosis filtration assembly, and the concentrate pipe is equipped with a concentrate outlet valve. A parallel-connected ambient temperature water pipe and a water storage pipe are used to discharge the pure water output by the reverse osmosis filtration component; the ambient temperature water pipe is equipped with an ambient temperature outlet valve; the water storage pipe is equipped with a water storage valve and a water storage tank, the water storage tank is used to store the pure water output by the reverse osmosis filtration component, and the output of the pure water is controlled by a flow control pump and provides pure water to the hot water pipe and the backwash pipe; The hot water pipe is equipped with a heating element and a hot water valve, and is used to discharge hot water; the backwash pipe is equipped with a pure water return valve, and is used to input pure water into the reverse osmosis filtration assembly to flush the reverse osmosis filter element.
7. The water purification system of claim 6, wherein Also includes: A pre-filter is used to pre-filter the raw water in the raw water pipe; A pure water pipe is arranged in parallel with the backwashing pipe and is used to output the pure water produced by the reverse osmosis filtering assembly; A post-filtering core is arranged to post-filter the pure water of the pure water pipe and to deliver the post-filtered pure water to the normal temperature water pipe and the water storage pipe.
8. The water purification system of claim 7, wherein, The post-filtering core and the pre-filtering core are combined into a composite filter core.
9. The water purification system of claim 6, wherein, The water storage tank is connected with a water discharge pipe, the hot water pipe and the backwashing pipe are connected in parallel with the water discharge pipe, and the water discharge pipe is provided with the flow control pump and the flow meter.
10. The water purification system of claim 9, wherein, The water storage tank is provided with a water level monitoring mechanism for detecting the pure water storage in the water storage tank.