Filter element for water purification equipment

Abstract

The utility model discloses a filter element for water purification equipment, which comprises a shell, a water inlet end cover, a concentrated water end cover, a pure water end cover, a cavity, an RO (reverse osmosis) membrane component and a central pipe are arranged in the shell, and a water inlet, a pure water port and a concentrated water port are arranged at one end of the shell; the water inlet is communicated with the RO membrane assembly through a water inlet end cover, the RO membrane assembly is arranged on the outer side of the central pipe in a surrounding manner, a water permeable hole is formed in the side part of the central pipe, and the output end of the central pipe is connected with the pure water port through a pure water end cover; the cavity surrounds the outer sides of the water inlet end cover and the RO membrane assembly, the concentrated water end cover surrounds the outer sides of the cavity and the water inlet end cover, a first concentrated water runner is formed among the cavity, the RO membrane assembly and the water inlet end cover, and the first concentrated water runner is connected with the concentrated water port through the concentrated water end cover; according to the filter element disclosed by the invention, the water permeable hole of the central pipe is matched with the pure water end cover to realize conveying of pure water, so that the volume of the pure water in the shell is greatly increased, and the TDS value of first cup of water is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, and particularly relates to a filter element for a water purification device. Background Art

[0002] At present, reverse osmosis water purifiers are widely popularized and applied in daily household life. Based on the principle of ion diffusion, reverse osmosis water purifiers can effectively remove impurities and harmful substances in water, providing safe and healthy drinking water for families. However, during the use of existing reverse osmosis water purifiers, there is a phenomenon of forward osmosis, which is particularly obvious during the static process of reverse osmosis water purifiers.

[0003] Most of the reverse osmosis filter elements currently on the market are designed with relatively large volumes at the water inlet end and the concentrated water end, while the volume of the pure water end is relatively small. Although this structural design improves the water purification efficiency to a certain extent, it also brings certain drawbacks. Specifically, due to the relatively large volumes of the water inlet end and the concentrated water end, it is easy for the reverse osmosis water inlet device to accumulate water with a relatively high salt content. During the static process, affected by the forward osmosis phenomenon, these high-concentration salts will gradually penetrate through the reverse osmosis membrane and into the pure water end. Since the volume of the pure water end is small, it is unable to effectively dilute these penetrated salts, resulting in a gradual increase in the concentration of the pure water end, and thus the total dissolved solids (TDS) content of the first glass of water is relatively high, reducing the user experience.

[0004] It can be seen that the existing technology still needs to be improved. Summary of the Utility Model

[0005] In view of the deficiencies of the above-mentioned existing technology, the purpose of the present utility model is to provide a filter element for a water purification device, which can increase the volume of pure water in the housing, slow down the forward osmosis phenomenon, effectively reduce the concentration of pure water during the static process, so as to reduce the TDS value of the first glass of water and improve the user experience.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A filter element for a water purification device, comprising a housing, wherein an inlet end cover, a concentrated water end cover, a pure water end cover, a cavity, an RO membrane assembly and a central tube are arranged in the housing; one end of the housing is provided with an inlet, a pure water outlet and a concentrated water outlet; the inlet is communicated with the RO membrane assembly through the inlet end cover, the RO membrane assembly is disposed around the outside of the central tube, a plurality of water permeable holes are provided on the side of the central tube, the output end of the central tube is communicated with the pure water end cover, a pure water flow channel is formed between the pure water end cover and the housing, and the output end of the pure water flow channel is connected to the pure water outlet; the cavity is disposed around the outside of the inlet end cover and the RO membrane assembly, the concentrated water end cover is disposed around the outside of the cavity and the inlet end cover, a first concentrated water flow channel is formed between the cavity, the RO membrane assembly and the inlet end cover, and the first concentrated water flow channel is connected to the concentrated water outlet through the concentrated water end cover.

[0008] In the filter element for the water purification device, a limiting seat is arranged in the housing, one end of the inlet end cover is connected with the limiting seat through a first sealing member, the other end of the inlet end cover is located between the cavity and the RO membrane assembly, and the first concentrated water flow channel is formed between the other end of the inlet end cover, the outside of the RO membrane assembly and the inner wall of the cavity.

[0009] In the filter element for the water purification device, a water inlet flow channel is provided in the middle of the inlet end cover, and the inlet is communicated with the RO membrane assembly through the water inlet flow channel.

[0010] In the filter element for the water purification device, a fixing seat is arranged in the housing, one end of the concentrated water end cover is connected with the fixing seat through a second sealing member; the other end of the concentrated water end cover is fixedly connected with the outer wall of the cavity, and a third sealing member is arranged between the inner wall of the other end of the concentrated water end cover and the outer wall of the cavity.

[0011] In the filter element for the water purification device, a second concentrated water flow channel is formed between the inner wall of the concentrated water end cover and the outer wall of the inlet end cover, and a third concentrated water flow channel is formed between the inner wall of the concentrated water end cover and the fixing seat; the first concentrated water flow channel, the second concentrated water flow channel, the third concentrated water flow channel and the concentrated water outlet are communicated in sequence.

[0012] In the filter element for the water purification device, a pure water pipe is arranged in the middle of the pure water end cover, the pure water pipe is located inside the central tube, and a fourth sealing member is arranged between the outer wall of the pure water pipe and the inner wall of the central tube; a drainage flow channel is provided in the middle of the pure water pipe, a drainage port is provided at the other end of the pure water end cover, and the inner cavity of the central tube, the drainage flow channel, the drainage port and the pure water flow channel are communicated in sequence.

[0013] In the filter element for the water purification device, the pure water end cover surrounds the outside of the RO membrane module and the cavity, and a fifth seal is provided between the inner wall of the other end of the pure water end cover and the outer wall of the cavity.

[0014] In the filter element for the water purification device, a connection seat is provided at one end of the housing, and the water inlet, the concentrated water outlet, and the pure water outlet are opened at the end of the connection seat; a connection block is provided on the side of the connection seat.

[0015] In the filter element for the water purification device, an operation block is provided at the other end of the housing, and an operation groove is opened on the side of the operation block.

[0016] Beneficial effects:

[0017] The utility model provides a filter element for a water purification device. Through the cooperation of the RO membrane module, multiple water permeable holes on the central tube, and the pure water end cover, the conveyance of pure water is realized, greatly increasing the volume of pure water in the housing, which can slow down the phenomenon of forward osmosis, effectively reduce the concentration of pure water during the standing process, so as to reduce the TDS value of the first glass of water and improve the user experience; further, by providing a cavity, during the initial water passing stage of the filter element, the problem of unexpected water flow interconnection between RO membrane modules caused by the significant pressure difference between the inside and the outside can be effectively solved, improving the stability and reliability of the filter element during operation. Description of the drawings

[0018] Figure 1 It is a schematic structural diagram of the filter element for the water purification device provided by the utility model;

[0019] Figure 2 It is the first internal sectional view of the filter element for the water purification device provided by the utility model;

[0020] Figure 3 It is the second inner wall sectional view of the filter element for the water purification device provided by the utility model.

[0021] Main element symbol description: 1 - housing, 11 - connection seat, 111 - connection block, 12 - pure water outlet, 13 - water inlet, 14 - concentrated water outlet, 15 - operation block, 151 - operation groove, 2 - water inlet end cover, 21 - first seal, 22 - water inlet flow channel, 3 - concentrated water end cover, 31 - second seal, 32 - third concentrated water flow channel, 33 - third seal, 4 - pure water end cover, 41 - drainage flow channel, 42 - fourth seal, 43 - fifth seal, 5 - cavity, 6 - RO membrane module, 7 - central tube, 71 - water permeable hole, 8 - first concentrated water flow channel. Detailed implementation manners

[0022] The present utility model provides a filter element for a water purification device. To make the objectives, technical solutions and effects of the present utility model clearer and more definite, the following further elaborates on the present utility model with reference to the accompanying drawings and by way of examples.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and should not be construed as limiting the present utility model; in addition, terms such as "installation", "connection", etc. should be understood in a broad sense, and for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 3 , the present utility model provides a filter element for a water purification device, including a housing 1. An inlet end cap 2, a concentrated water end cap 3, a pure water end cap 4, a cavity 5, an RO membrane assembly 6 and a central tube 7 are arranged inside the housing 1. An inlet port 13, a pure water port 12 and a concentrated water port 14 are opened at one end of the housing 1; the inlet port 13 is communicated with the RO membrane assembly 6 through the inlet end cap 2. The RO membrane assembly 6 is disposed outside the central tube 7. A plurality of water permeable holes 71 are opened on the side of the central tube 7. The output end of the central tube 7 is communicated with the pure water end cap 4. A pure water flow channel is formed between the pure water end cap 4 and the housing 1, and the output end of the pure water flow channel is connected to the pure water port 12; the cavity 5 is disposed outside the inlet end cap 2 and the RO membrane assembly 6, and the concentrated water end cap 3 is disposed outside the cavity 5 and the inlet end cap 2. A first concentrated water flow channel 8 is formed between the cavity 5, the RO membrane assembly 6 and the inlet end cap 2, and the first concentrated water flow channel 8 is connected to the concentrated water port 14 through the concentrated water end cap 3.

[0025] This application discloses a filter element for a purification device. By means of the RO membrane assembly 6 cooperating with the plurality of water permeable holes 71 on the central tube 7 and the pure water end cap 4, the conveyance of pure water is realized, greatly increasing the volume of pure water inside the housing 1, which can slow down the phenomenon of forward osmosis, effectively reducing the concentration of pure water during the standing process, so as to reduce the TDS value of the first glass of water and improve the user experience; further, by arranging the cavity 5, during the initial water passing stage of the filter element, the problem of unexpected water flow interconnection occurring between the RO membrane assemblies 6 caused by the significant pressure difference between the inside and the outside can be effectively solved, improving the stability and reliability of the filter element during operation.

[0026] In this embodiment, the RO membrane is a prior art and will not be elaborated here.

[0027] Further, please refer to Figure 2 and Figure 3, a limit seat is arranged in the housing 1. One end of the water inlet end cover 2 is connected with the limit seat in a matching manner through a first seal 21. The other end of the water inlet end cover 2 is located between the cavity 5 and the RO membrane module 6. The first concentrated water flow channel 8 is arranged between the other end of the water inlet end cover 2, the outer side of the RO membrane module 6, and the inner wall of the cavity 5.

[0028] In this embodiment, the limit seat and the housing 1 are integrally formed. By arranging the first seal 21 between the outer wall of the water inlet end cover 2 and the inner wall of the limit seat, the connection sealing performance between the water inlet end cover 2 and the limit seat is ensured, water leakage is prevented, and the water treatment efficiency and the reliability during the operation of the filter element are improved.

[0029] Further, please refer to Figure 2 and Figure 3 , a water inlet flow channel 22 is arranged in the middle of the water inlet end cover 2. The water inlet 13 is communicated with the RO membrane module 6 through the water inlet flow channel 22.

[0030] Further, please refer to Figure 2 and Figure 3 , a fixed seat is arranged in the housing 1. One end of the concentrated water end cover 3 is connected with the fixed seat through a second seal 31. The other end of the concentrated water end cover 3 is fixedly connected with the outer wall of the cavity 5. A third seal 33 is arranged between the inner wall of the other end of the concentrated water end cover 3 and the outer wall of the cavity 5.

[0031] In this embodiment, the fixed seat and the housing 1 are integrally formed. The second seal 31 is located between one end of the concentrated water end cover 3 and the fixed seat, effectively preventing liquid from leaking at the connection between the concentrated water end cover 3 and the fixed seat. The third seal 33 is located between the inner wall of the other end of the concentrated water end cover 3 and the outer wall of the cavity 5, further strengthening the sealing effect and ensuring the sealing performance at the connection between the concentrated water end cover 3 and the cavity 5. The double-sealing design formed by the cooperation of the second seal 31 and the third seal 33 improves the reliability of the concentrated water end cover 3 during operation, prevents the possible reduction in filtration caused by leakage, thereby prolonging the service life of the filter element and ensuring the safety of the filtration operation.

[0032] Further, please refer to Figure 2 and Figure 3 , a second concentrated water flow channel is formed between the inner wall of the concentrated water end cover 3 and the outer wall of the water inlet end cover 2. A third concentrated water flow channel 32 is formed between the inner wall of the concentrated water end cover 3 and the fixed seat. The first concentrated water flow channel 8, the second concentrated water flow channel, the third concentrated water flow channel 32, and the concentrated water outlet 14 are communicated in sequence.

[0033] In this embodiment, through the cooperation of four concentrated water channels, intermittent drainage of the concentrated water is achieved, greatly reducing the volume of the concentrated water in the housing 1, which can alleviate the forward osmosis phenomenon to a certain extent, reduce the concentration of pure water during the stationary process, and thus reduce the TDS value of the first glass of water.

[0034] Further, please refer to Figure 2 and Figure 3 , a pure water pipeline is provided in the middle of the pure water end cap 4. The pure water pipeline is located inside the central pipe 7, and a fourth seal 42 is provided between the outer wall of the pure water pipeline and the inner wall of the central pipe 7; a drainage channel 41 is provided in the middle of the pure water pipeline, and a drainage port is provided at the other end of the pure water end cap 4. The inner cavity of the central pipe 7, the drainage channel 41, the drainage port, and the pure water flow channel are connected in sequence.

[0035] In this embodiment, the other end of the pure water end cap 4 is ultrasonically welded to the inner wall of the other end of the housing 1; by providing a fourth seal 42 between the outer wall of the pure water pipeline and the inner wall of the central pipe 7, leakage of pure water inside the system can be effectively prevented, ensuring the purity of the pure water and the stability and reliability during the operation of the filter element; further, the setting of the drainage channel 41 in the middle of the pure water pipeline and the drainage port at the other end of the pure water end cap 4 enables the pure water inside the pure water end cap 4 to be discharged smoothly, further improving the stability and reliability during the operation of the filter element.

[0036] Further, please refer to Figure 2 and Figure 3 , the pure water end cap 4 surrounds the outside of the RO membrane module 6 and the cavity 5, and a fifth seal 43 is provided between the inner wall of the other end of the pure water end cap 4 and the outer wall of the cavity 5.

[0037] In this embodiment, by providing a fifth seal 43 between the inner wall of the other end of the pure water end cap 4 and the outer wall of the cavity 5, cross-flow of pure water and concentrated water can be effectively prevented, ensuring the normal working environment of the RO membrane module 6; further, by providing the fifth seal 43, it helps to maintain the pressure inside the filter element, ensure the efficient production of pure water, improve the stability and reliability during the operation of the filter element, and reduce the maintenance cost and maintenance frequency of the filter element.

[0038] In this embodiment, when the filter element is working, tap water enters the housing 1 through the water inlet 13, and then is filtered by the RO membrane module 6. During the filtering process, pure water enters the inner cavity of the central pipe 7 through a plurality of water permeable holes 71 on the central pipe 7, and then enters the pure water flow channel formed between the pure water end cap 4 and the housing 1 through the drainage channel 41 and the drainage port on the pure water end cap 4, and then is output outside the housing 1 through the pure water port 12; the concentrated water is output outside the housing 1 through four concentrated water channels and the concentrated water port 14 on the housing 1 in sequence.

[0039] In this embodiment, the first seal 21, the second seal 31, the third seal 33, the fourth seal 42, and the fifth seal 43 may be sealing rubber rings.

[0040] Further, please refer to Figure 1 , one end of the housing 1 is provided with a connection base 11, and the water inlet 13, the concentrated water outlet 14, and the pure water outlet 12 are opened at the end of the connection base 11; a connection clamping block 111 is provided on the side of the connection base 11.

[0041] In this embodiment, the connection base 11 and the housing 1 are integrally formed, and the connection clamping block 111 and the connection base 11 are integrally formed. The connection clamping block 111 is used to realize the clamping connection between the filter element and the water purification device, that is, the filter element and the water purification device are detachably connected. When the filtering effect of the filter element does not meet the use requirements, it is convenient to replace the filter element separately, improve the maintenance efficiency, and reduce the maintenance cost.

[0042] Further, please refer to Figure 1 , the other end of the housing 1 is provided with an operation block 15, and an operation groove 151 is opened on the side of the operation block 15.

[0043] In this embodiment, the operation block 15 and the housing 1 are integrally formed; by providing the operation groove 151 on the operation block 15, it is convenient for the user to rotate and install or rotate and disassemble the filter element, so as to realize the clamping connection between the filter element and the water purification device or to disconnect the connection between the filter element and the water purification device.

[0044] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and the inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A filter element for a water purification device, comprising a housing, characterized in that, Inside the housing, there are an inlet end cap, a concentrate end cap, a pure water end cap, a cavity, an RO membrane module, and a central tube. One end of the housing is provided with an inlet port, a pure water port, and a concentrate port. The inlet port is communicated with the RO membrane module through the inlet end cap. The RO membrane module is arranged around the outside of the central tube. A plurality of water permeable holes are provided on the side of the central tube. The output end of the central tube is communicated with the pure water end cap. A pure water flow channel is formed between the pure water end cap and the housing. The output end of the pure water flow channel is connected to the pure water port. The cavity is arranged around the outside of the inlet end cap and the RO membrane module. The concentrate end cap is arranged around the outside of the cavity and the inlet end cap. A first concentrate flow channel is formed between the cavity, the RO membrane module, and the inlet end cap. The first concentrate flow channel is connected to the concentrate port through the concentrate end cap.

2. The filter element for a water purification device according to claim 1, characterized in that, A limit seat is arranged inside the housing. One end of the inlet end cap is connected to the limit seat through a first sealing member. The other end of the inlet end cap is located between the cavity and the RO membrane module. The first concentrate flow channel is arranged between the other end of the inlet end cap, the outside of the RO membrane module, and the inner wall of the cavity.

3. A filter element for a water purification device according to claim 1, characterized in that, A water inlet flow channel is provided in the middle of the inlet end cap. The inlet port is communicated with the RO membrane module through the water inlet flow channel.

4. A filter element for a water purification device according to claim 1, characterized in that, A fixing seat is arranged inside the housing. One end of the concentrate end cap is connected to the fixing seat through a second sealing member. The other end of the concentrate end cap is fixedly connected to the outer wall of the cavity. A third sealing member is arranged between the inner wall of the other end of the concentrate end cap and the outer wall of the cavity.

5. The filter element for a water purification device according to claim 4, characterized in that, A second concentrate flow channel is formed between the inner wall of the concentrate end cap and the outer wall of the inlet end cap. A third concentrate flow channel is formed between the inner wall of the concentrate end cap and the fixing seat. The first concentrate flow channel, the second concentrate flow channel, the third concentrate flow channel, and the concentrate port are communicated in sequence.

6. A filter element for a water purification device according to claim 1, characterized in that, A pure water pipe is arranged in the middle of the pure water end cap. The pure water pipe is located inside the central tube. A fourth sealing member is arranged between the outer wall of the pure water pipe and the inner wall of the central tube. A drainage flow channel is provided in the middle of the pure water pipe. A drainage port is provided at the other end of the pure water end cap. The inner cavity of the central tube, the drainage flow channel, the drainage port, and the pure water flow channel are communicated in sequence.

7. A filter element for a water purification device according to claim 6, characterized in that, The pure water end cap is arranged around the outside of the RO membrane module and the cavity. A fifth sealing member is arranged between the inner wall of the other end of the pure water end cap and the outer wall of the cavity.

8. The filter element for a water purification device according to claim 1, wherein, A connection seat is arranged at one end of the housing. The inlet port, the concentrate port, and the pure water port are provided at the end of the connection seat. Connection blocks are provided on the side of the connection seat.

9. The filter element for a water purification device according to claim 1, characterized in that, An operation block is arranged at the other end of the housing. An operation groove is provided on the side of the operation block.

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