Filter element assembly and water purifier comprising same
By setting a filter core and multiple filter layers inside the central tube of the filter element, the problem of the single function of water purifier filter elements is solved, and the effective filtration of heavy metals and organic matter is achieved, ensuring water safety and saving production costs.
Patent Information
- Application Number
- CN202520065500.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing water purifiers have limited filter functions and cannot effectively remove heavy metals and organic matter, resulting in substandard water quality.
The filter core, consisting of two filter layers—an activated carbon rod and a heavy metal filter material layer—is set inside the central tube of the filter cartridge. Combined with the internal space design of the central tube, multiple filtration is achieved.
It effectively filters heavy metals and organic matter, ensuring water safety, while avoiding excessively large filter cartridges and increased production costs.
Smart Images
Figure CN223737878U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a filter element assembly and water purifier containing it. BACKGROUND
[0002] At present, the health water technology is the main development direction of water purification, wherein, removing harmful substances such as heavy metals, organic matter, while retaining beneficial minerals is the main goal of realizing health water. However, the existing water purification technology on the market cannot effectively realize the technical effect.
[0003] The filter element of the existing water purifier is generally a nanofiltration filter element, and its structure is that a layer of nanofiltration filter membrane is wound outside a center pipe. This nanofiltration filter element can retain part of the minerals during filtration, but cannot completely remove heavy metals and organic matter, and the filtration function is relatively single, which cannot meet the requirements of people on the quality of drinking water. Although some existing water purifiers can perform multiple filtration on water, they generally combine multiple filter elements with different filtration functions, which has certain requirements on the size of the water purifier. SUMMARY
[0004] The technical problem to be solved by the utility model is to overcome the defects of the single filter element function of the water purifier in the prior art, which cannot better filter harmful substances in water, and to provide a filter element assembly and a water purifier containing the same.
[0005] The utility model solves the above technical problems through the following technical scheme:
[0006] The utility model discloses a filter element assembly, which comprises a center pipe and a filter membrane, the center pipe is a hollow structure, a through hole in communication with the internal cavity is arranged on the outer peripheral surface of the center pipe, the filter membrane is wound on the outer peripheral surface of the center pipe and covers the through hole, the outlet of the filter membrane for filtering and purifying water is in communication with the through hole, the filter element assembly further comprises a cylindrical filter inner core, the filter inner core is arranged in the internal cavity of the center pipe, one end of the inner cavity of the filter inner core is closed, the other end of the inner cavity of the filter inner core is in communication with the outside of the center pipe, and the filter inner core is arranged so that water entering the center pipe enters the inner cavity of the filter inner core through the side wall of the filter inner core.
[0007] In the scheme, by the above technical scheme, a filter inner core is further arranged in the center pipe of the existing filter element, multiple filtration of drinking water is realized, the problem that a single filter element cannot better filter harmful substances in water due to the single function of the filter element is avoided, and the safety of water use is effectively ensured. Moreover, by utilizing the internal space of the center pipe, the external size of the filter element can also be avoided to be too large, the structure of the water purifier is avoided to be adjusted, and the production cost is saved.
[0008] Preferably, the filter core includes a first filter layer and a second filter layer, with the second filter layer wrapping around the outer periphery of the first filter layer.
[0009] In this solution, by setting up two filter layers, harmful substances in the water can be filtered out more effectively.
[0010] Furthermore, the first filter layer is an activated carbon rod, and the second filter layer is a functional material layer capable of filtering heavy metals; or, the first filter layer is a functional material layer capable of filtering heavy metals, and the second filter layer is an activated carbon rod.
[0011] In this solution, activated carbon rods can remove organic matter from water while retaining minerals. Heavy metals are removed through a functional material layer that filters heavy metals, thus solving the problem that existing nanofiltration cartridges cannot completely remove heavy metals and organic matter, and ensuring water safety.
[0012] Preferably, a first chamber is formed between the outer peripheral wall of the filter core and the inner sidewall of the central tube, and the two ends of the first chamber are sealed.
[0013] Preferably, the filter assembly further includes a housing, the central tube is disposed inside the housing, and the housing is further provided with a first inlet, a first outlet and a second outlet;
[0014] The raw water inlet of the filter membrane is connected to the first water inlet, the wastewater outlet of the filter membrane is connected to the first water outlet, and the inner cavity of the filter core is connected to the second water outlet.
[0015] In this solution, by setting up an outer shell, the filter material of the filter element assembly is prevented from being contaminated by the outside environment, thus affecting the filtration effect. On the other hand, it is convenient to install it in the water purifier and connect it to the water circuit interface of the water purifier.
[0016] Preferably, a second chamber is provided between the outer peripheral surface of the filter membrane and the inner wall surface of the housing, the first water inlet is provided at the first end of the housing, the raw water inlet of the filter membrane is provided near the second end of the housing, and the first water inlet is connected to the raw water inlet of the filter membrane through the second chamber.
[0017] In this solution, the above-mentioned technical solution can, on the one hand, increase the water flow path of the raw water to ensure that there is enough raw water in the filter element for filtration, and avoid unstable output of filtered water. On the other hand, it can prevent raw water from directly entering the filter membrane, which would cause the filter membrane to be damaged by water pressure.
[0018] Furthermore, the first water outlet and the second water outlet are located at the first end of the outer casing.
[0019] In this design, the first inlet, the first outlet, and the second outlet are located at the same end of the outer casing, which facilitates the installation of the filter element.
[0020] Furthermore, the outer casing includes a main casing and a casing end cap, the casing end cap being detachably and sealingly connected to the main casing, and the first water inlet, the first water outlet and the second water outlet being disposed on the casing end cap.
[0021] In this design, the outer shell is designed in two parts, which makes it easy to install filter elements such as the central tube inside the outer shell.
[0022] Furthermore, the end cap of the housing includes a first end cap inner ring, a second end cap inner ring, and an end cap outer ring arranged sequentially from the inside to the outside. A first annular cavity is formed between the first end cap inner ring and the second end cap inner ring, and a second annular cavity is formed between the second end cap inner ring and the end cap outer ring.
[0023] The first water inlet is connected to the second annular cavity, the first water outlet is connected to the first annular cavity, and the second water outlet is connected to the cavity formed by the inner ring of the first end cap.
[0024] The filter element assembly further includes an inner end cap and a central tube end cap. One end of the inner end cap is fitted onto the outer peripheral surface of the filter membrane, and the outer peripheral surface of the other end of the inner end cap is sealed to the inner wall surface of the inner ring of the second end cap. A water outlet channel is provided in the middle of the central tube end cap. The inner cavity of the filter core is connected to the outside of the central tube through the water outlet channel. The end of the water outlet channel away from the filter core extends into the inner ring of the first end cap and is sealed to the inner peripheral wall of the inner ring of the first end cap.
[0025] In this solution, the above technical solution enables the raw water, filtered wastewater, and filtered purified water to flow into or out of the filter element through different water flow paths when the filter element is working, thus avoiding contamination of the purified water by the raw water or wastewater.
[0026] This utility model also discloses a water purifier, which includes the filter element assembly described above.
[0027] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.
[0028] The positive and progressive effects of this utility model are as follows:
[0029] This invention achieves multiple filtration of drinking water by adding an inner filter core inside the central tube of an existing filter cartridge. This avoids the problem that a single filter cartridge, with its limited function, cannot effectively filter harmful substances in the water, thus ensuring water safety. Furthermore, by utilizing the internal space of the central tube, this solution avoids an excessively large external volume of the filter cartridge, eliminating the need to adjust the structure of the water purifier and saving production costs. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the external structure of the filter assembly according to an embodiment of the present invention.
[0031] Figure 2 for Figure 1 Cross-sectional view of the internal structure of the filtering component.
[0032] Figure 3 This is a schematic diagram of the structure of the central tube assembly inside the filter assembly of this utility model.
[0033] Figure 4 for Figure 3 A cross-sectional view of the central tube assembly.
[0034] Figure 5 This is a schematic diagram of the structure of the end cap of the housing in an embodiment of this utility model.
[0035] Explanation of reference numerals in the attached figures:
[0036] Main housing 100
[0037] Card Block 101
[0038] 200 shell end cap
[0039] First water inlet 201
[0040] First outlet 202
[0041] Second outlet 203
[0042] First end cap inner ring 210
[0043] Second end cap inner ring 220
[0044] End cap outer ring 230
[0045] Filter membrane 300
[0046] First filter layer 400
[0047] Second filter layer 500
[0048] Central tube 600
[0049] Through Hole 601
[0050] Columnar protrusion 602
[0051] Inner end cap 700
[0052] Center tube end cap 800
[0053] First chamber 10
[0054] Second chamber 20
[0055] The inner cavity of the filter core is 30. Detailed Implementation
[0056] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0057] like Figures 1-5 The diagram shown is a schematic representation of the filter element assembly in this embodiment. In this embodiment, the filter element assembly includes a central tube 600 and a filter membrane 300. The central tube 600 has a hollow structure, and a through-hole 601 communicating with its internal cavity is provided on its outer circumferential surface. The filter membrane 300 is wound around the outer circumferential surface of the central tube 600 and covers the through-hole 601. The outlet of the filtered water from the filter membrane 300 is connected to the through-hole 601, allowing the filtered water to enter the interior of the central tube through the through-hole 601. The filter membrane 300 is composed of a nanofiltration membrane sheet, a separator, and a flow guiding cloth, which are stacked and wound around the outer circumference of the central tube 600, covering the through-hole 601. The filter element assembly also includes a cylindrical filter core, which is disposed within the internal cavity of the central tube 600. One end of the inner cavity 30 of the filter core is closed, and the other end of the inner cavity 30 of the filter core communicates with the outside of the central tube 600. The filter core is configured such that water entering the central tube 600 through the through hole 601 enters the inner cavity 30 of the filter core through the side wall of the filter core.
[0058] By adding an inner filter element within the central tube 600 of the existing filter cartridge, multiple filtration of drinking water is achieved. This avoids the problem of a single filter cartridge being unable to effectively filter harmful substances in the water due to its limited function, thus effectively ensuring water safety. Furthermore, by utilizing the internal space of the central tube 600, this solution avoids an excessively large external volume of the filter cartridge, eliminating the need to adjust the structure of the water purifier and saving production costs.
[0059] There are multiple through holes 601 on the outer surface of the central tube 600, which are spaced apart along the axial direction of the central tube 600. In this embodiment, there are two rows of through holes 601 on the outer surface of the central tube 600, which are arranged symmetrically at the center.
[0060] like Figure 3 and Figure 4As shown, the first end (upper end) of the central tube 600 is open, and the second end (lower end) of the central tube 600 is closed. A detachable central tube end cap 800 is installed at the opening of the central tube 600. After the filter core is inserted into the central tube 600, the central tube end cap 800 limits and fixes the filter core to prevent it from detaching from the central tube 600. A water outlet channel 801 is provided in the middle of the central tube end cap 800, and the inner cavity 30 of the filter core is connected to the outside of the central tube 600 through the water outlet channel 801.
[0061] like Figure 4 As shown, a cylindrical protrusion 602 is also provided in the middle of the end face of the second end of the central tube 600. The cylindrical protrusion 602 is located in the internal cavity of the central tube. When the filter core is inserted into the central tube 600, the cylindrical protrusion 602 is inserted into the inner cavity 30 of the filter core. The filter core and the end face of the second end of the central tube 600 are fitted and sealed to prevent external water from entering the inner cavity 30 of the filter core through the end of the filter core. In some other embodiments, the end of the filter core located at the second end of the central tube 600 can also be made into a closed structure during production.
[0062] like Figure 2 and Figure 4 As shown, in this embodiment, the filter core includes a first filter layer 400 and a second filter layer 500, with the second filter layer 500 wrapping around the outer periphery of the first filter layer 400. By providing two filter layers, harmful substances in the water can be filtered more effectively. In other embodiments, the filter core can be a single filter layer or multiple filter layers; the filtration functions of different filter layers in the filter core can be the same or different. The specific structure and filtration function of the filter core can be configured according to requirements.
[0063] In this embodiment, the first filter layer 400 is a functional material layer capable of filtering heavy metals, and the second filter layer 500 is an activated carbon rod. The activated carbon rod removes organic matter from the water while retaining minerals, and the functional material layer removes heavy metals, thus solving the problem that existing nanofiltration cartridges cannot completely remove heavy metals and organic matter, ensuring water safety.
[0064] In this embodiment, the activated carbon rod has a hollow cylindrical structure. The first filter layer 400, which is a functional material layer capable of filtering heavy metals, can be a commercially available functional filter membrane, such as PP cotton (or modified PP cotton). By wrapping the functional material layer around the inner circumference of the activated carbon rod, and with the water flow direction being from the outside of the activated carbon to first pass through the activated carbon rod and then through the functional material layer, the functional material layer can effectively intercept the powder from the activated carbon rod, preventing the activated carbon powder from entering the effluent. The pre-filtered purified water entering the central pipe 600 is first filtered by the activated carbon rod, then flows through the functional filter membrane of the first filter layer 400 and into the inner cavity 30 of the filter core, and finally flows out through the purified water outlet of the filter element assembly.
[0065] In some other embodiments, the first filter layer 400 is an activated carbon rod, and the second filter layer 500 is a functional material layer capable of filtering heavy metals. The pre-filtered purified water entering the central tube 600 is first filtered by the functional material layer capable of filtering heavy metals, then flows out through the activated carbon rod and enters the inner cavity 30 of the filter core, and finally flows out through the purified water outlet of the filter element assembly.
[0066] A first chamber 10 is formed between the outer peripheral wall of the filter core and the inner side wall of the central tube 600, and both ends of the first chamber 10 are sealed. The pre-filtered purified water from the filter membrane 300 enters the first chamber 10 through the through hole 601 of the central tube 600 and is buffered, and then enters the inner cavity 30 of the filter core through the side wall of the filter core.
[0067] like Figure 2 As shown, the filter element assembly also includes a housing, with a central tube 600 disposed within the housing. The housing also has a first inlet 201, a first outlet 202, and a second outlet 203. The raw water inlet of the filter membrane 300 is connected to the first inlet 201, the wastewater outlet of the filter membrane 300 is connected to the first outlet 202, and the inner cavity 30 of the filter core is connected to the second outlet 203. By providing a housing, on the one hand, the filter material of the filter element assembly is prevented from being contaminated by external factors, thus affecting the filtration effect; on the other hand, it facilitates installation in the water purifier and connection to the water circuit interface of the water purifier.
[0068] like Figure 1 and Figure 2 As shown, in this embodiment, the outer casing includes a main casing 100 and a casing end cap 200, which is detachably and sealingly connected to the main casing 100. A first inlet 201, a first outlet 202, and a second outlet 203 are located on the casing end cap 200, meaning they are situated at the same end of the outer casing, facilitating filter element installation. The modular design of the outer casing allows for the installation of filter element components such as the central tube 600 within the casing.
[0069] In some other embodiments, the first water inlet 201, the first water outlet 202, and the second water outlet 203 can be set in different positions on the housing according to the housing structure. Attention should be paid to the position settings of the raw water inlet of the filter membrane 300, the filtered wastewater outlet, and the filtered clean water outlet on the filter element assembly.
[0070] like Figure 2 and Figure 5 As shown, in this embodiment, the housing end cap 200 includes a first end cap inner ring 210, a second end cap inner ring 220, and an end cap outer ring 230 arranged sequentially from the inside out. A first annular cavity is formed between the first end cap inner ring 210 and the second end cap inner ring 220, and a second annular cavity is formed between the second end cap inner ring 220 and the end cap outer ring 230. A first water inlet 201 communicates with the second annular cavity, a first water outlet 202 communicates with the first annular cavity, and a second water outlet 203 communicates with the cavity formed by the first end cap inner ring 210. The filter element assembly also includes an inner end cap 700, one end of which is sleeved on the outer peripheral surface of the filter membrane 300, and the outer peripheral surface of the other end of the inner end cap 700 is sealed to the inner wall surface of the second end cap inner ring 220 by a sealing ring. The water outlet channel 801 of the central tube end cap 800 extends into the inner ring 210 of the first end cap and is sealed to the inner circumferential wall of the inner ring 210 of the first end cap by a sealing ring.
[0071] In this embodiment, the first inlet 201 communicates with the second annular cavity to form a raw water flow channel, the first outlet 202 communicates with the first annular cavity to form a wastewater flow channel, and the second outlet 203 communicates with the cavity formed by the inner ring 210 of the first end cap to form a purified water flow channel. This ensures that during operation, raw water, filtered wastewater, and filtered purified water flow into or out of the filter element through different water flow paths, preventing the purified water from being contaminated by the raw water or wastewater.
[0072] like Figure 2 As shown, a second chamber 20 is formed between the outer peripheral surface of the filter membrane 300 and the inner wall surface of the outer shell. A first water inlet 201 is located at the first end of the outer shell, and the raw water inlet of the filter membrane 300 is located near the second end of the outer shell. The first water inlet 201 is connected to the raw water inlet of the filter membrane 300 through the second chamber 20. This structure increases the flow path of the raw water, ensuring sufficient raw water for filtration within the filter element and preventing unstable filtered water output. Furthermore, it prevents raw water from directly entering the filter membrane 300, thus avoiding damage caused by water pressure impact.
[0073] like Figure 2As shown in the figure, the dashed line represents the water filtration path of the filter element assembly in this embodiment. When the filter element is working, raw water enters the outer casing through the first inlet 201 (raw water inlet), passes through the second chamber 20, and then enters the raw water inlet of the filter membrane 300 located at the lower end. It undergoes preliminary filtration through the filter membrane 300. The pre-filtered purified water flows out through the filtered purified water outlet of the filter membrane 300 and then enters the first chamber 10 through the through hole 601 on the central tube 600. The pre-filtered purified water entering the first chamber 10 is then filtered again through the second filter layer 500 and the first filter layer 400 before flowing into the inner cavity 30 of the filter core. It then enters the purified water channel formed by the inner ring 210 of the first end cap 800 at the upper part of the central tube 600 and flows out through the second outlet 203 (purified water outlet). Wastewater generated by the filter membrane 300 is discharged through the wastewater outlet on the filter membrane 300 through the first outlet 202 (wastewater outlet).
[0074] like Figure 1 As shown, the main housing 100 of the outer shell is also provided with a locking block 101, which is used to position and limit the filter element assembly when it is installed in the water purifier.
[0075] This utility model also discloses a water purifier, which includes the filter element assembly as described above.
[0076] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A filter cartridge assembly comprising a center tube and a filter membrane, the center tube being a hollow structure, a through hole being provided on an outer peripheral surface of the center tube and communicating with an internal cavity, the filter membrane being wound on the outer peripheral surface of the center tube and covering the through hole, an outlet of the filter membrane for filtered clean water communicating with the through hole, characterized in that, The filter core assembly further comprises a cylindrical filter inner core arranged in the inner cavity of the central pipe, an inner cavity of the filter inner core is closed at one end, and the other end of the inner cavity of the filter inner core is in communication with the outside of the central pipe. The filter inner core is arranged such that water entering the central pipe through the through hole enters the inner cavity of the filter inner core through the side wall of the filter inner core.
2. The filter cartridge assembly of claim 1, wherein, The filter inner core comprises a first filter layer and a second filter layer, and the second filter layer is wrapped around the outer circumferential side of the first filter layer.
3. The filter cartridge assembly of claim 2 wherein, The first filter layer is an activated carbon rod, and the second filter layer is a functional material layer capable of filtering heavy metals. Alternatively, the first filter layer is a functional material layer capable of filtering heavy metals, and the second filter layer is an activated carbon rod.
4. The filter cartridge assembly of claim 1 wherein, A first cavity is formed between the outer circumferential wall of the filter inner core and the inner side wall of the central pipe, and the two ends of the first cavity are closed.
5. The filter cartridge assembly of claim 1, wherein, The filter core assembly further comprises a shell, the central pipe is arranged in the shell, and the shell is further provided with a first water inlet, a first water outlet and a second water outlet. The raw water inlet of the filter membrane is in communication with the first water inlet, the waste water outlet of the filter membrane is in communication with the first water outlet, and the inner cavity of the filter inner core is in communication with the second water outlet.
6. The filter cartridge assembly of claim 5 wherein, A second cavity is formed between the outer circumferential surface of the filter membrane and the inner wall surface of the shell, the first water inlet is arranged at the first end of the shell, the raw water inlet of the filter membrane is arranged close to the second end of the shell, and the first water inlet is in communication with the raw water inlet of the filter membrane through the second cavity.
7. The filter cartridge assembly of claim 6, wherein, The first water outlet and the second water outlet are arranged at the first end of the shell.
8. The filter cartridge assembly of claim 5 wherein, The shell comprises a main shell and a shell end cover, the shell end cover is detachably and sealingly connected with the main shell, and the first water inlet, the first water outlet and the second water outlet are arranged on the shell end cover.
9. The filter cartridge assembly of claim 8 wherein, The shell end cover comprises a first end cover inner ring, a second end cover inner ring and an end cover outer ring arranged in sequence from inside to outside, a first annular cavity is formed between the first end cover inner ring and the second end cover inner ring, and a second annular cavity is formed between the second end cover inner ring and the end cover outer ring. The first water inlet is in communication with the second annular cavity, the first water outlet is in communication with the first annular cavity, and the second water outlet is in communication with a cavity enclosed by the first end cover inner ring. The filter core assembly further comprises an inner end cover and a central pipe end cover, one end of the inner end cover is sleeved on the outer circumferential surface of the filter membrane, the outer circumferential surface of the other end of the inner end cover is sealingly connected with the inner wall surface of the second end cover inner ring, the central pipe end cover is provided with a water outlet passage, the inner cavity of the filter inner core is in communication with the outside of the central pipe through the water outlet passage, and one end of the water outlet passage away from the filter inner core extends into the first end cover inner ring and is sealingly connected with the inner circumferential wall of the first end cover inner ring.
10. A water purifier characterized by comprising: The filter core assembly comprises the filter core assembly according to any one of claims 1-9.