Filter element assembly and water purification equipment

Abstract

The utility model discloses a filter element assembly and water purification equipment, and relates to the technical field of water purification, the filter element assembly comprises a filter bottle, a central pipe, a filter material and a filter element cover; a containing cavity is formed in the filter bottle, and a mounting opening communicated with the containing cavity is formed in the top of the filter bottle; the central pipe is arranged in the accommodating cavity, and central water inlet holes are formed in the peripheral side; the filter material is wound on the central pipe, the inner peripheral side of the filter material is communicated with the central water inlet hole, a water storage space is formed between the outer peripheral side and the cavity wall of the accommodating cavity, and the bottom of the water storage space is communicated with the lower end opening of the central pipe; the filter element cover covers the mounting opening and is provided with a raw water inlet end, a wastewater outlet end and a pure water outlet end, the raw water inlet end is communicated with the outer periphery of the upper end part of the filter material, the wastewater outlet end is communicated with the inner periphery of the upper end part of the filter material, and the pure water outlet end is communicated with the top of the water storage space. According to the scheme, the water path structure in the filter element is improved, and the proportion of pure water in the water body in the filter element can be increased, so that the TDS value of the first cup of water obtained by filtering after the filter element is shut down and restarted can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and in particular to a filter element assembly and water purification equipment. Background Technology

[0002] The core component of a water purifier is the filter element. The filter element filters the raw water through corresponding membrane elements to remove impurities and pollutants such as bacteria, calcium and magnesium ions, and heavy metals, ensuring the quality of the output water.

[0003] In existing filter cartridges, especially those using reverse osmosis membranes, the proportion of raw water and filtered wastewater in the filter system is much greater than that of the filtered pure water. When the water purifier stops, the inlet solenoid valve closes, creating a sealed space inside the filter cartridge. At this time, the remaining raw water, wastewater, and pure water in various parts of the filter cartridge are mixed and diluted. Because the proportion of raw water and wastewater is much greater than that of pure water, the TDS (Total Dissolved Solids) value at the inlet end of the entire filter cartridge is extremely high after shutdown. When the water purifier is restarted, the inlet solenoid valve opens, and under pressure, the high TDS mixture remaining in the filter cartridge is filtered first. This naturally results in a relatively high TDS value in the filtered pure water after restarting for a period of time, thus adversely affecting the normal use of the water purifier. Utility Model Content

[0004] The main purpose of this invention is to propose a filter cartridge assembly that aims to solve the problem that the TDS value of the first cup of water filtered after a shutdown and restart in the existing filter cartridge is high.

[0005] To achieve the above objectives, the filter element assembly proposed in this utility model includes:

[0006] A filter bottle has an internal cavity; the top of the filter bottle has an installation port that communicates with the cavity.

[0007] A central tube is disposed within the accommodating cavity; a central water inlet hole is provided on the periphery of the central tube;

[0008] The filter media is wound around the central tube; the inner circumferential side of the filter media is connected to the central water inlet hole, and a water storage space is formed between the outer circumferential side of the filter media and the cavity wall of the accommodating cavity; the bottom of the water storage space is connected to the lower end opening of the central tube.

[0009] A filter element cover is fitted onto the mounting port; the filter element cover has a raw water inlet, a wastewater outlet, and a pure water outlet. The raw water inlet is connected to the outer periphery of the upper end of the filter material, the wastewater outlet is connected to the inner periphery of the upper end of the filter material, and the pure water outlet is connected to the top of the water storage space.

[0010] In one embodiment, the filter element assembly further includes a first flow-through end cap, the upper end of which is sealed to the filter element cover, and the lower end of which is sealed to the upper end of the filter material. The first flow-through end cap is provided with a raw water channel, a wastewater channel, and a first pure water channel. The raw water channel is connected to the raw water inlet and the outer periphery of the upper end of the filter material. The wastewater channel is connected to the wastewater outlet and the inner periphery of the upper end of the filter material. The first pure water channel is connected to the pure water outlet and the top of the water storage space.

[0011] In one embodiment, the first overflow end cap is provided with a first connecting post, which is inserted into the upper opening of the central tube.

[0012] In one embodiment, a partition is provided inside the central tube, which divides the inner cavity of the central tube into a first chamber and a second chamber. The first chamber is connected to the upper opening of the central tube, and the second chamber is connected to the lower opening of the central tube. The central water inlet is connected to the second chamber.

[0013] In one embodiment, the first overflow end cap is provided with a first connecting post, which is sealed and inserted into the upper opening of the central tube; the first pure water flow channel passes through the first connecting post and communicates with the first chamber.

[0014] In one embodiment, the first pure water flow channel includes a central channel and at least two radial channels. The central channel is located at the central axis of the first flow end cover and extends vertically. The top of the central channel is connected to the pure water outlet. The at least two radial channels are arranged circumferentially around the first flow end cover. The inner ends of the at least two radial channels are connected to the bottom of the central channel, and the outer ends of the at least two radial channels are connected to the top of the water storage space.

[0015] In one embodiment, the raw water flow channel includes a first annular channel and at least two first guide channels. The first annular channel is arranged circumferentially around the first flow end cap, and the upper end of the first annular channel is connected to the raw water inlet. The at least two first guide channels are arranged at intervals circumferentially around the first flow end cap. The top of the at least two first guide channels is connected to the lower end of the first annular channel, and the bottom of the at least two first guide channels is connected to the outer periphery of the upper end of the filter material.

[0016] In one embodiment, the wastewater flow channel includes a second annular channel and at least two second guide channels. The second annular channel is arranged circumferentially around the first flow end cap, and the upper end of the second annular channel is connected to the wastewater outlet. The at least two second guide channels are arranged at intervals circumferentially around the first flow end cap. The top of the at least two second guide channels is connected to the lower end of the second annular channel, and the bottom of the at least two second guide channels is connected to the inner periphery of the upper end of the filter material.

[0017] In one embodiment, the filter element assembly further includes a second flow end cap, which is sealed and fitted onto the lower end of the filter material. The second flow end cap has a second pure water flow channel inside, which is connected to the lower opening of the central tube and the bottom of the water storage space.

[0018] In one embodiment, the filter element assembly further includes an outer skeleton tube disposed between the outer periphery of the filter material and the water storage space.

[0019] In one embodiment, the filter material includes a reverse osmosis membrane.

[0020] This utility model also proposes a water purification device, which includes the filter element assembly as described above.

[0021] In the technical solution of this utility model, the pure water obtained after filtration by the filter material is not directly discharged from the upper opening of the central tube, but flows through the water storage space from the lower opening of the central tube, and then is discharged outward from the pure water outlet. That is to say, in addition to the central tube, the path that the pure water needs to flow through also includes an additional water storage space. This can increase the proportion of pure water in the filter element during the operation of the filter element, thereby reducing the TDS (Total Dissolved Solids) value in the filter element after shutdown in a convenient and low-cost manner without adding a pure water storage tank or increasing the overall size of the machine. This reduces the TDS value of the first cup of water filtered after the filter element is restarted. In addition, the water circuit structure corresponding to the filter element assembly in this embodiment has a more uniform water flow distribution than the water circuit structure of existing filter elements, which can better avoid the problem of water stagnation or slow flow in some places. Moreover, since the bottom of the filter bottle is a water storage space to hold pure water, it can prevent raw water and wastewater from accumulating and remaining at the bottom of the filter bottle, thus avoiding the formation of dead water areas. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 An exploded view of an embodiment of the filter element assembly provided by this utility model;

[0024] Figure 2 A schematic cross-sectional view of an embodiment of the filter element assembly provided by this utility model;

[0025] Figure 3 A partially exploded structural diagram of an embodiment of the filter element assembly provided by this utility model;

[0026] Figure 4 A cross-sectional view of the central tube in one embodiment of the filter element assembly provided by this utility model;

[0027] Figure 5 A three-dimensional structural schematic diagram of the first flow-through end cap in one embodiment of the filter element assembly provided by this utility model;

[0028] Figure 6 A cross-sectional view of the first flow end cap in one embodiment of the filter element assembly provided by this utility model.

[0029] Explanation of icon numbers:

[0030] 1. Filter bottle; 11. Receptacle; 12. Mounting port; 111. Water storage space;

[0031] 2. Central pipe; 21. Central water inlet; 22. Baffle; 23. First chamber; 24. Second chamber;

[0032] 3. Filter media;

[0033] 4. Filter cartridge cover; 41. Raw water inlet; 42. Wastewater outlet; 43. Pure water outlet;

[0034] 5. First overflow end cap; 51. Raw water flow channel; 52. Wastewater flow channel; 53. First pure water flow channel; 54. First connecting column; 511. First annular channel; 512. First guide channel; 521. Second annular channel; 522. Second guide channel; 531. Central channel; 532. Radial channel;

[0035] 6. Second overflow end cap; 61. Second pure water flow channel; 62. Second connecting column.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] In existing filter cartridges, especially those using reverse osmosis membranes, the proportion of raw water and filtered wastewater in the filter system is much greater than that of the filtered pure water. When the water purifier stops, the inlet solenoid valve closes, creating a sealed space inside the filter cartridge. At this time, the remaining raw water, wastewater, and pure water in various parts of the filter cartridge are mixed and diluted. Because the proportion of raw water and wastewater is much greater than that of pure water, the TDS (Total Dissolved Solids) value at the inlet end of the entire filter cartridge is extremely high after shutdown. When the water purifier is restarted, the inlet solenoid valve opens, and under pressure, the high TDS mixture remaining in the filter cartridge is filtered first. This naturally results in a relatively high TDS value in the filtered pure water after restarting for a period of time, thus adversely affecting the normal use of the water purifier.

[0041] The traditional solution to this problem is to add a pure water storage tank to the water purifier. When the machine stops and restarts, the pure water in the storage tank will flow out first, thus solving the problem of poor water quality in the first cup. However, the drawback of this solution is that it requires a certain amount of space inside the water purifier to install the pure water storage tank, which will increase the size of the entire machine and is not conducive to the miniaturization and lightweight improvement of the water purifier.

[0042] Based on the above problems, this utility model provides a filter element that, without the need to add a pure water storage tank and avoid excessive overall size, improves the water channel structure inside the filter element to increase the proportion of pure water in the water body inside the filter element, thereby reducing the TDS value of the first cup of water filtered after the filter element is restarted.

[0043] Please see Figure 1 and Figure 2 The filter element assembly provided in this embodiment of the present invention includes:

[0044] The filter bottle 1 has a receiving cavity 11 inside; the top of the filter bottle 1 has an installation port 12 that communicates with the receiving cavity 11.

[0045] The central tube 2 is disposed within the accommodating cavity 11; a central water inlet hole 21 is provided on the periphery of the central tube 2;

[0046] The filter media 3 is wound around the central tube 2; the inner circumferential side of the filter media 3 is connected to the central water inlet 21, and the outer circumferential side of the filter media 3 forms a water storage space 111 between the cavity wall of the accommodating cavity 11, and the bottom of the water storage space 111 is connected to the lower end opening of the central tube 2.

[0047] The filter element cover 4 is fitted onto the mounting port 12. The filter element cover 4 is provided with a raw water inlet 41, a wastewater outlet 42 and a pure water outlet 43. The raw water inlet 41 is connected to the outer periphery of the upper end of the filter material 3, the wastewater outlet 42 is connected to the inner periphery of the upper end of the filter material 3, and the pure water outlet 43 is connected to the top of the water storage space 111.

[0048] In this embodiment, the filter material 3 may specifically include an RO membrane (Reverse Osmosis membrane) and other filter membrane layers. The filter material 3 can be wound onto the central tube 2 in the same manner as existing reverse osmosis membrane filter cartridges. Multiple central water inlet holes 21 can be provided, and these multiple central water inlet holes 21 can be spaced apart circumferentially along the central tube 2 and arranged in an array along the axial direction of the central tube 2 to ensure that the pure water obtained after filtration by the filter material 3 can enter the inner cavity of the central tube 2 from various positions circumferentially and axially through the corresponding central water inlet holes 21.

[0049] Based on the above settings, during the filtration process using this filter assembly, such as Figure 2 As shown, external raw water enters the filter media 3 through the raw water inlet 41, and after being filtered by the filter media 3, wastewater and pure water are obtained. The wastewater will flow from bottom to top from the inner periphery of the upper end of the filter media 3 to the wastewater outlet 42, and then be discharged to the outside from the wastewater outlet 42. The pure water enters the inner cavity of the central pipe 2 through the central inlet hole 21, and then flows into the water storage space 111 through the lower opening of the central pipe 2. It then flows from bottom to top through the water storage space 111 to the pure water outlet 43, and finally is discharged to the outside from the pure water outlet 43.

[0050] Compared with existing filter cartridges, in this embodiment, the pure water obtained after filtration by the filter material 3 is not directly discharged from the upper opening of the central tube 2, but flows through the water storage space 111 from the lower opening of the central tube 2, and then is discharged outward from the pure water outlet 43. In other words, in addition to the central tube 2, the path that the pure water needs to flow through also includes the water storage space 111. This can increase the proportion of pure water in the filter cartridge during operation, thereby reducing the TDS (Total Dissolved Solids) value in the filter cartridge after shutdown in a convenient and low-cost manner without adding a pure water storage tank or increasing the overall size of the machine. This reduces the TDS value of the first cup of water filtered after the filter cartridge is restarted. In addition, the water channel structure corresponding to the filter element assembly in this embodiment has a more uniform water flow distribution than the existing filter element water channel structure, which can better avoid the problem of water stagnation or slow flow in local positions. Furthermore, since the bottom of the filter bottle 1 is a water storage space 111 for holding pure water, it can prevent raw water and wastewater from accumulating and remaining at the bottom of the filter bottle 1, thus avoiding the formation of dead water areas.

[0051] In one embodiment, refer to Figures 1 to 3 The filter element assembly also includes a first flow end cap 5. The upper end of the first flow end cap 5 is sealed to the filter element cap 4, and the lower end of the first flow end cap 5 is sealed to the upper end of the filter material 3. The first flow end cap 5 is provided with a raw water channel 51, a wastewater channel 52 and a first pure water channel 53. The raw water channel 51 is connected to the raw water inlet 41 and the outer periphery of the upper end of the filter material 3. The wastewater channel 52 is connected to the wastewater outlet 42 and the inner periphery of the upper end of the filter material 3. The first pure water channel 53 is connected to the pure water outlet 43 and the top of the water storage space 111.

[0052] Specifically, the first overflow end cap 5 acts as a connector, allowing for the connection and fixation between the filter media 3 and the filter element cover 4. This creates a water storage space 111 between the outer periphery of the filter media 3 and the cavity wall of the receiving chamber 11. Furthermore, the sealing effect between the first overflow end cap 5, the filter element cover 4, and the filter media 3 ensures normal flow of water between the filter element cover 4, the first overflow end cap 5, and the filter media 3, preventing water leakage to other areas and thus maintaining the filtration effect. Preferably, the upper end of the filter media 3 can be sealed to the lower end of the first overflow end cap 5 using an adhesive such as quick-drying glue.

[0053] In one embodiment, refer to Figures 1 to 4 The central tube 2 is equipped with a partition 22, which divides the inner cavity of the central tube 2 into a first chamber 23 and a second chamber 24. The first chamber 23 is connected to the upper opening of the central tube 2, and the second chamber 24 is connected to the lower opening of the central tube 2. The central water inlet 21 is connected to the second chamber 24.

[0054] By setting a partition 22 inside the central tube 2, the first chamber 23 and the water storage space 111 can be isolated from each other, thus achieving the separation between the upper opening of the central tube 2 and the water storage space 111. This allows pure water entering the central tube 2 through the central water inlet 21 to be easily guided into the water storage space 111 through the second chamber 24, preventing pure water from overflowing from the upper opening of the central tube 2 to other areas and damaging the filtration effect.

[0055] In one embodiment, refer to Figures 1 to 4 The first overflow end cap 5 is provided with a first connecting post 54, which is inserted into the upper opening of the central tube 2.

[0056] By inserting the first connecting post 54 into the central tube 2, the central tube 2 can be centered and positioned using the first overflow end cap 5, thereby ensuring the positional stability of the central tube 2 in the accommodating cavity 11.

[0057] Furthermore, based on the partition 22 configuration in the previous embodiment, while retaining the upper opening of the central tube 2, the connection between the upper opening of the central tube 2 and the pure water entering the central tube 2 is blocked, and a first chamber 23 is formed at the upper end of the central tube 2. The first chamber 23 can provide sufficient space for the insertion and mating of the first connecting post 54. Optionally, as... Figure 2As shown, when the first connecting post 54 is inserted into the first chamber 23 through the upper opening of the central tube 2, the outer cylindrical surface of the first connecting post 54 is sealed to the cavity wall of the first chamber 23 through the sealing ring, and the first pure water flow channel 53 passes through the first connecting post 54 and communicates with the first chamber 23; thus, the first chamber 23 can be used to form a buffer space, which can be used to buffer the pure water flowing from the first pure water flow channel 53 to the pure water outlet 43; and due to the presence of the partition 22, the pure water in the first chamber 23 can be prevented from mixing with the pure water in the second chamber 24.

[0058] In one embodiment, refer to Figures 1 to 6 The first pure water flow channel 53 includes a central channel 531 and at least two radial channels 532. The central channel 531 is located at the central axis of the first overflow end cover 5 and extends vertically. The top of the central channel 531 is connected to the pure water outlet end 43. The at least two radial channels 532 are arranged circumferentially around the first overflow end cover 5. The inner ends of the at least two radial channels 532 are connected to the bottom of the central channel 531, and the outer ends of the at least two radial channels 532 are connected to the top of the water storage space 111.

[0059] The filter material 3 is centrally located in the accommodating cavity 11, so that the water storage space 111 formed between the outer periphery of the filter material 3 and the cavity wall of the accommodating cavity 11 is annular. In this embodiment, by setting at least two radial channels 532 arranged circumferentially, it can be ensured that the pure water flowing upward from the annular water storage space 111 can converge to the central channel 531 through at least two radial directions, and finally be discharged outward through the pure water outlet 43 located in the center on the filter element cover 4, thereby reducing water flow obstruction and ensuring smooth flow of pure water between the water storage space 111 and the first overflow end cover 5.

[0060] In one embodiment, refer to Figures 1 to 6 The raw water flow channel 51 includes a first annular channel 511 and at least two first guide channels 512. The first annular channel 511 is arranged around the first flow end cover 5 in a circumferential direction, and the upper end of the first annular channel 511 is connected to the raw water inlet end 41. The at least two first guide channels 512 are arranged at intervals along the circumferential direction of the first flow end cover 5. The top of the at least two first guide channels 512 is connected to the lower end of the first annular channel 511, and the bottom of the at least two first guide channels 512 is connected to the outer periphery of the upper end of the filter material 3.

[0061] By providing a first annular channel 511 on the first overflow end cap 5, it is not necessary to limit the relative fitting angle between the first overflow end cap 5 and the filter element cover 4 in the circumferential direction. In other words, after the filter element cover 4 is closed on the first overflow end cap 5, even if the filter element cover 4 is rotated around its central axis, the raw water inlet 41 on the filter element cover 4 can always remain connected to the annular first annular channel 511, thereby ensuring that the raw water can flow smoothly from the raw water inlet 41 into the first overflow end cap 5, improving application flexibility. Furthermore, by providing at least two first guide channels 512 arranged circumferentially on the first overflow end cap 5, the raw water entering the first annular channel 511 can enter the filter media 3 from at least two areas through the first guide channels 512, thereby making the distribution of raw water in the circumferential direction of the filter media 3 more uniform. This allows for full utilization of the filter media 3 and effectively avoids the problem that the raw water injected into the filter media 3 is concentrated in a single area of ​​the filter media 3, resulting in excessive filtration pressure in that area while other areas are not fully utilized.

[0062] In one embodiment, refer to Figures 1 to 6 The wastewater flow channel 52 includes a second annular channel 521 and at least two second guide channels 522. The second annular channel 521 is arranged around the first flow end cover 5 in a circumferential direction, and the upper end of the second annular channel 521 is connected to the wastewater outlet end 42. The at least two second guide channels 522 are arranged at intervals along the circumferential direction of the first flow end cover 5. The top of the at least two second guide channels 522 is connected to the lower end of the second annular channel 521, and the bottom of the at least two second guide channels 522 is connected to the inner periphery of the upper end of the filter material 3.

[0063] By providing at least two second flow channels 522 arranged circumferentially on the first flow end cover 5, the wastewater obtained after filtration by the filter material 3 can enter the second annular channel 521 from at least two areas through the second flow channels 522. This avoids the problem of excessive discharge pressure caused by the wastewater flowing from the filter material 3 to the first flow end cover 5 through only a single channel, and ensures the smooth flow of wastewater between the filter material 3 and the first flow end cover 5. By providing a second annular channel 521 on the first overflow end cover 5, it is not necessary to limit the relative fitting angle between the first overflow end cover 5 and the filter element cover 4 in the circumferential direction. In other words, after the filter element cover 4 is closed on top of the first overflow end cover 5, even if the filter element cover 4 is rotated around the central axis, the wastewater outlet 42 on the filter element cover 4 can always remain connected with the annular second annular channel 521. This ensures that the wastewater entering the second annular channel 521 from the second flow guide channel 522 can smoothly enter the wastewater outlet 42 from the first overflow end cover 5, thus improving the application flexibility.

[0064] Preferably, since the flow rate of raw water is greater than the flow rate of wastewater, the first annular channel 511 is arranged around the second annular channel 521, so that the volume of the first annular channel 511 is greater than the volume of the second annular channel 521, thereby the first annular channel 511 can better meet the needs of the larger flow rate of raw water.

[0065] Based on the water channel structure of the first overflow end cap 5 in the above embodiment, the raw water channel 51, wastewater channel 52 and first pure water channel 53 can be kept separate from each other while completing the filtration operation.

[0066] In one embodiment, refer to Figures 1 to 4 The filter element assembly also includes a second flow end cap 6, which is sealed and fitted onto the lower end of the filter material 3. The second flow end cap 6 has a second pure water flow channel 61 inside, which is connected to the lower opening of the central tube 2 and the bottom of the water storage space 111.

[0067] Specifically, the sealing effect between the second overflow end cap 6 and the filter media 3 ensures the normal flow of pure water between the central pipe 2 and the water storage space 111, while preventing water leakage to other areas and thus avoiding damage to the normal operation of the filter element assembly. The lower end of the filter media 3 can be sealed to the second overflow end cap 6 using an adhesive such as quick-drying glue.

[0068] Preferably, the second overflow end cap 6 is provided with a second connecting post 62, which is sealed and inserted into the lower end opening of the central tube 2. The second pure water flow channel 61 passes through the second connecting post 62 and communicates with the second chamber 24. This can improve the relative positional stability between the filter material 3 and the central tube 2.

[0069] In one embodiment, refer to Figure 1 and Figure 2 The filter element assembly also includes an outer skeleton tube (not shown in the figure), which is disposed between the outer periphery of the filter material 3 and the water storage space 111.

[0070] Specifically, the upper end of the outer skeleton tube can be sealed to the first flow end cap 5, and the lower end of the outer skeleton tube can be sealed to the second flow end cap 6. The outer skeleton tube, the first flow end cap 5, and the second flow end cap 6 together play a role in pressure bearing and sealing, which can isolate the water storage space 111 from the filter material 3, so that the pure water in the water storage space 111 will not be contaminated by the wastewater or raw water leaked from the filter material 3.

[0071] In one exemplary embodiment, the outer skeleton tube is made of metal, and the outer skeleton tube is connected and fixed to the first flow end cap 5 and the second flow end cap 6 by threaded fasteners. In another exemplary embodiment, the outer skeleton tube is made of glass fiber, and the outer skeleton tube can be wound around the surface of the filter material 3 and cured with an adhesive. In yet another exemplary embodiment, the outer skeleton tube is made of plastic, which has advantages such as low cost and ease of processing and manufacturing.

[0072] This utility model embodiment also provides a water purification device; please refer to [link / reference]. Figures 1 to 6 The water purification device includes the filter cartridge assembly in any of the above embodiments.

[0073] The water purification device in this embodiment can be any one of a water purifier, a water dispenser, a water softener / purifier combo machine, a water purifier / heater combo machine, and an ice maker. The specific structure of the filter assembly can be referred to the above embodiments. Since the water purification device in this embodiment adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0074] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A filter element assembly, characterized in that, The filter assembly includes: A filter bottle has an internal cavity; the top of the filter bottle has an installation port that communicates with the cavity. A central tube is disposed within the accommodating cavity; a central water inlet hole is provided on the periphery of the central tube; The filter media is wound around the central tube; the inner circumferential side of the filter media is connected to the central water inlet hole, and a water storage space is formed between the outer circumferential side of the filter media and the cavity wall of the accommodating cavity; the bottom of the water storage space is connected to the lower end opening of the central tube. A filter element cover is fitted onto the mounting port; the filter element cover has a raw water inlet, a wastewater outlet, and a pure water outlet. The raw water inlet is connected to the outer periphery of the upper end of the filter material, the wastewater outlet is connected to the inner periphery of the upper end of the filter material, and the pure water outlet is connected to the top of the water storage space.

2. The filter element assembly as described in claim 1, characterized in that, The filter element assembly further includes a first flow-through end cap, the upper end of which is sealed to the filter element cover, and the lower end of which is sealed to the upper end of the filter material. The first flow-through end cap is provided with a raw water channel, a wastewater channel and a first pure water channel. The raw water channel is connected to the raw water inlet and the outer periphery of the upper end of the filter material. The wastewater channel is connected to the wastewater outlet and the inner periphery of the upper end of the filter material. The first pure water channel is connected to the pure water outlet and the top of the water storage space.

3. The filter element assembly as described in claim 2, characterized in that, The first overflow end cap has a first connecting post protruding from it, and the first connecting post is inserted into the upper opening of the central tube.

4. The filter element assembly as described in claim 2, characterized in that, The central tube is equipped with a partition, which divides the inner cavity of the central tube into a first chamber and a second chamber. The first chamber is connected to the upper opening of the central tube, and the second chamber is connected to the lower opening of the central tube. The central water inlet is connected to the second chamber.

5. The filter element assembly as described in claim 4, characterized in that, The first overflow end cap has a first connecting post protruding from it, and the first connecting post is sealed and inserted into the upper opening of the central tube; the first pure water flow channel passes through the first connecting post and communicates with the first chamber.

6. The filter element assembly as described in claim 2, characterized in that, The first pure water flow channel includes a central channel and at least two radial channels. The central channel is located at the central axis of the first flow end cover and extends vertically. The top of the central channel is connected to the pure water outlet. The at least two radial channels are arranged circumferentially around the first flow end cover. The inner ends of the at least two radial channels are connected to the bottom of the central channel, and the outer ends of the at least two radial channels are connected to the top of the water storage space.

7. The filter element assembly as described in claim 2, characterized in that, The raw water flow channel includes a first annular channel and at least two first guide channels. The first annular channel is arranged around the first flow end cover in a circumferential direction, and the upper end of the first annular channel is connected to the raw water inlet. The at least two first guide channels are arranged at intervals in a circumferential direction along the first flow end cover. The top of the at least two first guide channels is connected to the lower end of the first annular channel, and the bottom of the at least two first guide channels is connected to the outer periphery of the upper end of the filter material. And / or, the wastewater flow channel includes a second annular channel and at least two second guide channels. The second annular channel is arranged circumferentially around the first flow end cover, and the upper end of the second annular channel is connected to the wastewater outlet. The at least two second guide channels are arranged at intervals circumferentially around the first flow end cover. The top of the at least two second guide channels is connected to the lower end of the second annular channel, and the bottom of the at least two second guide channels is connected to the inner periphery of the upper end of the filter material.

8. The filter element assembly as claimed in claim 1, characterized in that, The filter element assembly further includes a second flow end cap, which is sealed and fitted onto the lower end of the filter material. The second flow end cap has a second pure water flow channel inside, which is connected to the lower opening of the central tube and the bottom of the water storage space.

9. The filter element assembly as described in any one of claims 1 to 8, characterized in that, The filter element assembly also includes an outer skeleton tube, which is disposed between the outer periphery of the filter material and the water storage space. And / or, the filter material includes a reverse osmosis membrane.

10. A water purification device, characterized in that, The water purification device includes a filter cartridge assembly as described in any one of claims 1 to 9.

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