Water purification system and water purifier

Abstract

The utility model relates to the technical field of water purification equipment, in particular to a water purification system and a water purifier. The water purification system comprises a water inlet pipeline, a pure water pipeline, a concentrated water pipeline and a membrane filter element, one end of the water inlet pipeline is communicated with the water inlet, one end of the concentrated water pipeline is communicated with the concentrated water port, an air bag is arranged in the membrane filter element and filled with a preset amount of gas, and the pure water pipeline is communicated with the pure water port; the water purification system continues to work for preset time, and pure water generated by the membrane filter element extrudes and compresses the air bag. When the RO water purifier works, the concentrated water side of the membrane filter element starts to release pressure, compressed air in the air bag extrudes pure water towards the concentrated water side, the pure water permeates through a membrane of the membrane filter element, and the concentrated water is extruded, so that the problems that in the standing process of the RO water purifier after water production, the concentration of calcium and magnesium ions measured by the concentrated water of the RO membrane is very high, and the calcium and magnesium ions are easy to crystallize and precipitate and are attached to the membrane surface; therefore, the water production capacity of the RO water purifier is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a water purification system and a water purifier. Background Art

[0002] With the improvement of people's living standards, people pay more and more attention to water quality and hygiene. It has become a trend to equip households with water purification equipment. A water purifier, also known as a water purification machine or water quality purifier, is a water treatment device that deeply filters and purifies water quality according to the usage requirements of water. The core technology thereof is the filter membrane in the filter element device, and the main technologies come from three types: ultrafiltration membrane, RO reverse osmosis membrane, and nanofiltration membrane. After the conventional RO water purifier produces water, during the standing process, due to the very high concentration of calcium and magnesium ions on the concentrated water side of the RO membrane, it is easy to crystallize and precipitate and adhere to the membrane surface. The precipitated water scale covering the membrane surface will affect the water production capacity of the membrane, resulting in a decrease in the water production capacity of the water purifier. Content of the Utility Model

[0003] In view of this, the utility model provides a water purification system and a water purifier, which are used to solve the problem that in the prior art, during the standing process after the RO water purifier produces water, the concentration of calcium and magnesium ions on the concentrated water side of the RO membrane is very high, and it is easy to crystallize and precipitate and adhere to the membrane surface, resulting in a decrease in the water production capacity of the RO water purifier.

[0004] To achieve one or part or all of the above purposes or other purposes, the utility model provides a water purification system, including a water inlet pipeline, a pure water pipeline, a concentrated water pipeline, and a membrane filter element. The membrane filter element has a water inlet, a pure water outlet, and a concentrated water outlet. One end of the water inlet pipeline is communicated with the water inlet, one end of the concentrated water pipeline is communicated with the concentrated water outlet. An airbag is arranged inside the membrane filter element, and a preset amount of gas is filled in the airbag. The pure water pipeline is communicated with the pure water outlet. When the pure water pipeline is switched from being opened to being closed, the water purification system continues to work for a preset time, and the pure water generated by the membrane filter element squeezes the airbag to compress.

[0005] Preferably, the membrane filter element includes a filter element housing, a membrane element, an upper end cover, a lower end cover, and a concentrated water check valve. The water inlet, the pure water outlet, and the concentrated water outlet are arranged on the filter element housing. The central pipe of the membrane element is hermetically connected to the filter element housing and communicated with the pure water outlet. The upper end cover is covered on the upper end of the membrane element and forms a raw water channel, and the raw water channel is communicated with the water inlet. The lower end cover is covered on the lower end of the membrane element to form a first channel. A second channel is formed between the outer side wall of the membrane element and the inner side wall of the filter element housing. The first channel and the second channel form a concentrated water channel, and the concentrated water channel is communicated with the concentrated water outlet. The concentrated water check valve is arranged in the lower end cover for separating the first channel and the second channel.

[0006] Preferably, the upper end of the central tube is an open end and protrudes, the lower end of the central tube is a closed end, the inner upper wall of the filter element housing is provided with a first connection port, the first connection port communicates with the pure water port, and the outer wall of the open end is hermetically connected to the inner wall of the first connection port.

[0007] Preferably, the upper end cover is provided with an upper cover port, the inner upper wall of the filter element housing is provided with a second connection port, the second connection port communicates with the water inlet, the first connection port is located within the second connection port, and the outer wall of the upper cover port is connected to the inner wall of the second connection port.

[0008] Preferably, the lower end cover is provided with a lower cover port, the first channel is formed by the closed end, the lower end portion of the membrane element, and the inner wall of the lower end cover, the concentrated water check valve is disposed at the lower cover port, and the second channel is formed by the outer wall of the membrane element, the inner wall of the filter element housing, the outer wall of the upper end cover, and the outer wall of the lower end cover.

[0009] Preferably, the membrane element is a RO membrane element.

[0010] Preferably, the airbag is strip-shaped, and both ends of the airbag are respectively located at both ends of the central tube.

[0011] Preferably, the water inlet pipeline includes a first pipeline, a first solenoid valve, and a booster pump. One end of the first pipeline is connected to the water inlet, and both the first solenoid valve and the booster pump are disposed on the first pipeline.

[0012] Preferably, the pure water pipeline includes a pure water pipeline and a second solenoid valve. One end of the pure water pipeline is connected to the pure water port, and the second solenoid valve is disposed on the pure water pipeline.

[0013] The present invention also provides a water purifier, including the above-mentioned water purification system.

[0014] Implementing the embodiments of the present invention will have the following beneficial effects:

[0015] After adopting the above-mentioned water purification system and water purifier, when the user closes the drinking water outlet, that is, closes the pure water pipeline, the water purification system continues to make water, the membrane filter element is filled with pure water, the pressure of the pure water increases, and the air inside the airbag is compressed; when the water purification system stops making water, the concentrated water side of the membrane filter element starts to relieve pressure, and the compressed gas in the airbag will squeeze the pure water towards the concentrated water side, and the pure water permeates through the membrane of the membrane filter element and enters the concentrated water side, squeezing out the concentrated water, thereby greatly reducing the TDS of the concentrated water side and reducing the calcium and magnesium ion concentration of the concentrated water side, solving the problem that in the prior art, during the static process after the RO water purifier makes water, the calcium and magnesium ion concentration on the concentrated water side of the RO membrane is very high, easy to crystallize and precipitate and adhere to the membrane surface, resulting in a decrease in the water production capacity of the RO water purifier. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Among them:

[0018] Figure 1 is a schematic structural diagram of a water purification system in an embodiment of the application of the present invention;

[0019] Figure 2 is a schematic cross-sectional view of a membrane filter element in an embodiment of the application of the present invention;

[0020] Figure 3 is a schematic diagram of the water flow direction of a membrane filter element in an embodiment of the application of the present invention.

[0021] Description of the Reference Numerals in the Drawings:

[0022] Water inlet pipeline 1, first pipeline 11, first solenoid valve 12, booster pump 13, pure water pipeline 2, concentrated water pipeline 3, membrane filter element 4, central pipe 41, communication port 411, filter element housing 42, water inlet 421, pure water outlet 422, concentrated water outlet 423, first connection port 424, second connection port 425, membrane element 43, upper end cover 44, lower end cover 45, concentrated water check valve 46, raw water channel 47, pure water channel 48, first channel 491, second channel 492, airbag 5. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0026] Embodiment 1

[0027] As Figures 1 to 3 shown, an embodiment of the present utility model discloses a water purification system, including a water inlet pipeline 1, a pure water pipeline 2, a concentrated water pipeline 3, and a membrane filter element 4. The membrane filter element 4 has a water inlet 421, a pure water outlet 422, and a concentrated water outlet 423. One end of the water inlet pipeline 1 is communicated with the water inlet 421, one end of the concentrated water pipeline 3 is communicated with the concentrated water outlet 423, the pure water pipeline 2 is communicated with the pure water outlet 422, an airbag 5 is arranged inside the membrane filter element 4, a preset amount of gas is filled in the airbag 5, and when the pure water pipeline 2 is switched from open to closed, the water purification system continues to work for a preset time, and the pure water generated by the membrane filter element 4 squeezes the airbag 5 to compress.

[0028] When the user closes the drinking water outlet, that is, closes the pure water pipeline 2, the water purification system continues to produce water. The membrane filter element 4 is filled with pure water, the pressure of the pure water increases, and the air inside the airbag 5 is compressed; when the water production of the water purification system stops, the concentrated water side of the membrane filter element 4 starts to relieve pressure, and the compressed gas in the airbag 5 will squeeze the pure water to the concentrated water side. The pure water permeates through the membrane of the membrane filter element 4 and enters the concentrated water side, squeezing out the concentrated water, thereby greatly reducing the TDS of the concentrated water side and reducing the calcium and magnesium ion concentration of the concentrated water side, solving the problem that in the prior art, during the static process after water production by an RO water purifier, the calcium and magnesium ion concentration on the concentrated water side of the RO membrane is very high, easy to crystallize and precipitate and adhere to the membrane surface, resulting in the decline of the water production capacity of the RO water purifier.

[0029] In this embodiment, the membrane filter element 4 includes a filter element housing 42, a membrane element 43, an upper end cap 44, a lower end cap 45, and a concentrated water check valve 46. The water inlet 421, the pure water outlet 422, and the concentrated water outlet 423 are provided on the filter element housing 42. The central tube 41 of the membrane element 43 is hermetically connected to the filter element housing 42 and communicates with the pure water outlet 422. The upper end cap 44 covers the upper end portion of the membrane element 43 and forms a raw water channel 47. The raw water channel 47 communicates with the water inlet 421. The lower end cap 45 covers the lower end portion of the membrane element 43 to form a first channel 491. The outer side wall of the membrane element 43 and the inner side wall of the filter element housing 42 form a second channel 492. The first channel 491 and the second channel 492 form a concentrated water channel. The concentrated water channel communicates with the concentrated water outlet 423. The concentrated water check valve 46 is provided in the lower end cap 45 for separating the first channel 491 and the second channel 492.

[0030] The water inlet pipe 1 enters the raw water channel 47 through the water inlet 421. Under the action of the membrane element 43, the prepared pure water enters the pure water channel 48 through the communication port 411, and the prepared concentrated water enters the first channel 491. The concentrated water then flows through the concentrated water check valve 46 to the second channel 492, and then flows out through the concentrated water outlet 423. Due to the action of the concentrated water check valve 46, the concentrated water in the second channel 492 can be prevented from flowing back to the first channel 491.

[0031] In this embodiment, the upper end of the central tube 41 is an open end and protrudes, and the lower end of the central tube 41 is a closed end. The upper inner side wall of the filter element housing 42 is provided with a first connection port 424. The first connection port 424 communicates with the pure water outlet 422. The outer side wall of the open end is hermetically connected to the inner side wall of the first connection port 424. The protrusion of the central tube 41 facilitates the hermetic connection with the first connection port 424 and prevents the pure water in the central tube 41 from leaking through the connection.

[0032] In this embodiment, the upper end cap 44 is provided with an upper cover port. The upper inner side wall of the filter element housing 42 is provided with a second connection port 425. The second connection port 425 communicates with the water inlet 421. The first connection port 424 is located within the second connection port 425. The outer side wall of the upper cover port is connected to the inner side wall of the second connection port 425. The first connection port 424 being located within the second connection port 425 enables the protruding part of the central tube 41 to be located within the raw water channel 47, effectively reducing the overall volume of the membrane filter element 4.

[0033] In this embodiment, the lower end cover 45 is provided with a lower cover opening. The first channel 491 is formed by the closed end, the lower end portion of the membrane element 43, and the inner side wall of the lower end cover 45. The concentrated water check valve 46 is arranged at the lower cover opening. The second channel 492 is formed by the outer side wall of the membrane element 43, the inner side wall of the filter element housing 42, the outer side wall of the upper end cover 44, and the outer side wall of the lower end cover 45. The concentrated water check valve 46 is installed at the lower cover opening, so that the function of the concentrated water check valve 46 is to separate the concentrated water in the membrane element 43 from the concentrated water between the membrane element 43 and the filter element housing 42.

[0034] In this embodiment, the membrane element 43 is a RO membrane element.

[0035] In this embodiment, the airbag 5 is strip-shaped, and both ends of the airbag 5 are respectively located at both ends of the central pipe 41.

[0036] In this embodiment, the number of the communication ports 411 is eight, and the eight communication ports 411 are symmetrically distributed with the axis of the central pipe 41 as the midline.

[0037] In this embodiment, the water inlet pipeline 1 includes a first pipeline 11, a first solenoid valve 12, and a booster pump 13. One end of the first pipeline 11 is connected to the water inlet 421, and both the first solenoid valve 12 and the booster pump 13 are arranged on the first pipeline 11. The other end of the first pipeline 11 is used to connect to tap water. The function of the first solenoid valve 12 is to open or close the water inlet pipeline 1 of the membrane filter element 4, and the function of the booster pump 13 is to increase the water pressure of the water inlet of the membrane filter element 4, so that the membrane filter element 4 can produce pure water under normal working pressure.

[0038] In this embodiment, the pure water pipeline 2 includes a pure water pipeline and a second solenoid valve. One end of the pure water pipeline is connected to the pure water port 422, and the second solenoid valve is arranged on the pure water pipeline.

[0039] Embodiment Two

[0040] As Figures 1 to 3 shown, the embodiment of the present utility model also discloses a water purifier, including the above-mentioned water purification system. The water purification system includes a water inlet pipeline 1, a pure water pipeline 2, a concentrated water pipeline 3, and a membrane filter element 4. The membrane filter element 4 has a water inlet 421, a pure water port 422, and a concentrated water port 423. One end of the water inlet pipeline 1 is communicated with the water inlet 421, one end of the concentrated water pipeline 3 is communicated with the concentrated water port 423, the pure water pipeline 2 is communicated with the pure water port 422, an airbag 5 is arranged in the membrane filter element 4, a preset amount of gas is filled in the airbag 5, and when the pure water pipeline 2 is switched from open to closed, the water purification system continues to work for a preset time, and the pure water generated by the membrane filter element 4 squeezes the airbag 5 to compress.

[0041] When the user closes the drinking water outlet, the pure water pipeline 2 is closed. The water purification system continues to produce water, and the membrane filter element 4 is filled with pure water. The pressure of the pure water increases, and the air inside the airbag 5 is compressed. When the water production of the water purification system stops, the concentrated water side of the membrane filter element 4 starts to relieve pressure. The compressed gas in the airbag 5 will squeeze the pure water towards the concentrated water side. The pure water permeates through the membrane of the membrane filter element 4 and enters the concentrated water side, squeezing out the concentrated water. Thus, the TDS of the concentrated water side is greatly reduced, and the calcium and magnesium ion concentration of the concentrated water side is reduced, solving the problem that in the prior art, during the static process after water production by the RO water purifier, the calcium and magnesium ion concentration on the concentrated water side of the RO membrane is very high, easy to crystallize and precipitate and adhere to the membrane surface, resulting in the decline of the water production capacity of the RO water purifier.

[0042] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A water purification system, characterized in that: It includes a water inlet pipeline, a pure water pipeline, a concentrated water pipeline and a membrane filter element. The membrane filter element has a water inlet, a pure water outlet and a concentrated water outlet. One end of the water inlet pipeline is communicated with the water inlet, one end of the concentrated water pipeline is communicated with the concentrated water outlet, and the pure water pipeline is communicated with the pure water outlet. An air bag is arranged in the membrane filter element, and a preset amount of gas is filled in the air bag. When the pure water pipeline is switched from being open to being closed, the water purification system continues to work for a preset time, and the pure water generated by the membrane filter element squeezes the air bag to compress it.

2. The water purification system according to claim 1, wherein: The membrane filter element includes a filter element housing, a membrane element, an upper end cover, a lower end cover and a concentrated water check valve. The water inlet, the pure water outlet and the concentrated water outlet are arranged on the filter element housing. The central pipe of the membrane element is hermetically connected to the filter element housing and communicated with the pure water outlet. The upper end cover is covered on the upper end portion of the membrane element and forms a raw water channel, and the raw water channel is communicated with the water inlet. The lower end cover is covered on the lower end portion of the membrane element to form a first channel. The outer side wall of the membrane element and the inner side wall of the filter element housing form a second channel. The first channel and the second channel form a concentrated water channel, and the concentrated water channel is communicated with the concentrated water outlet. The concentrated water check valve is arranged in the lower end cover and is used to separate the first channel and the second channel.

3. The water purification system according to claim 2, wherein: The upper end of the central pipe is an open end and protrudes, the lower end of the central pipe is a closed end, and a first connection port is arranged on the upper inner side wall of the filter element housing. The first connection port is communicated with the pure water outlet, and the outer side wall of the open end is hermetically connected to the inner side wall of the first connection port.

4. The water purification system according to claim 3, wherein: The upper end cover is provided with an upper cover port, and a second connection port is arranged on the upper inner side wall of the filter element housing. The second connection port is communicated with the water inlet. The first connection port is located in the second connection port, and the outer side wall of the upper cover port is connected to the inner side wall of the second connection port.

5. The water purification system according to claim 4, wherein: The lower end cover is provided with a lower cover port. The first channel is formed by the closed end, the lower end portion of the membrane element and the inner side wall of the lower end cover. The concentrated water check valve is arranged in the lower cover port. The second channel is formed by the outer side wall of the membrane element, the inner side wall of the filter element housing, the outer side wall of the upper end cover and the outer side wall of the lower end cover.

6. The water purification system according to claim 2, wherein: The membrane element is a RO membrane element.

7. The water purification system according to claim 2, wherein: The air bag is strip-shaped, and both ends of the air bag are respectively located at both ends of the central pipe.

8. The water purification system according to claim 1, characterized in that: The water inlet pipeline includes a first pipeline, a first solenoid valve and a booster pump. One end of the first pipeline is connected to the water inlet, and the first solenoid valve and the booster pump are both arranged on the first pipeline.

9. The water purification system according to claim 1, wherein: The pure water pipeline includes a pure water pipeline and a second solenoid valve. One end of the pure water pipeline is connected to the pure water outlet, and the second solenoid valve is arranged on the pure water pipeline.

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

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