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
- CN202520077277.8
- 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, including activated carbon rods and functional material layers, is set inside the central tube of the filter cartridge. Through the multi-layer filtration structure, multiple filtrations of water are achieved. Combined with the internal space design of the central tube, the filter cartridge volume is avoided from being too large.
It achieves multiple filtrations of harmful substances in the water, ensuring water safety, while saving production costs and eliminating the need to adjust the water purifier structure.
Smart Images
Figure CN223737880U_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 central 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 central pipe and a filter membrane, the central pipe is a hollow structure, an inner recessed area is arranged on the outer peripheral surface of the central pipe, the filter membrane is wound on the outer periphery of the central pipe and covers the inner recessed area, the filter element assembly further comprises a cylindrical filter inner core, the filter inner core is arranged in the cavity of the central 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 communicated with the inner recessed area through a fluid passage.
[0007] The outer peripheral wall of the filter inner core and the inner side wall of the central pipe have a first cavity, and the end portion of the central pipe is provided with an opening, and the opening is communicated with the first cavity.
[0008] In the scheme, by the above technical scheme, a filter inner core is further arranged in the central 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 central 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.
[0009] Preferably, the filter 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.
[0010] In this scheme, by arranging two filter layers, harmful substances in water can be better filtered.
[0011] Further, the first filter layer is an activated carbon rod, and the second filter layer is a functional material layer capable of filtering heavy metals.
[0012] In this scheme, by the activated carbon rod, organic matter in water can be removed, and minerals in water can be retained, and by the functional material layer capable of filtering heavy metals, heavy metals are removed, thereby solving the defects that existing nanofiltration filter cores cannot completely remove heavy metals and organic matter, and ensuring water safety.
[0013] Preferably, the filter core assembly further comprises a shell, the center tube 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.
[0014] 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 opening is in communication with the second water outlet.
[0015] In this scheme, by arranging the shell, on the one hand, the filtering material of the filter core assembly is prevented from being polluted by the outside world, and the filtering effect is affected, and on the other hand, the filter core assembly is conveniently arranged in a water purifier and connected with the waterway interface of the water purifier.
[0016] Preferably, the outer circumferential surface of the filter membrane and the inner wall surface of the shell have a second cavity, the first water inlet is arranged at the first end portion of the shell, the raw water inlet of the filter membrane is arranged close to the second end portion of the shell, and the first water inlet is in communication with the raw water inlet of the filter membrane through the second cavity.
[0017] In this scheme, by adopting the above technical scheme, on the one hand, the water flow path of raw water can be increased, and enough raw water in the filter core is ensured to be filtered, so that the outflow of filtered water is stable, and on the other hand, the raw water is prevented from directly entering the filter membrane, so that the filter membrane is prevented from being damaged due to water pressure impact.
[0018] Further, the first water outlet and the second water outlet are arranged at the first end portion of the shell.
[0019] In this scheme, the first water inlet, the first water outlet and the second water outlet are arranged at the same end of the shell, so that the installation of the filter core is facilitated.
[0020] Further, the shell comprises a main shell and a shell end cover, the shell end cover is detachably and sealingly connected with the main shell, the first water inlet, the first water outlet and the second water outlet are arranged on the shell end cover.
[0021] In the scheme, the shell is designed in a split body, so that the filter core components such as the central pipe can be installed in the shell.
[0022] Further, 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.
[0023] 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 formed by the first end cover inner ring.
[0024] The filter core assembly further comprises an inner 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, and the inner circumferential wall of the first end cover inner ring is sealingly connected with the end outer circumferential wall of one end of the central pipe provided with the opening.
[0025] In the scheme, the filter core assembly is used to make the raw water, the filtered waste water and the filtered clean water flow into or out of the filter core through different water flow paths, so that the clean water is prevented from being polluted by the raw water or the waste water.
[0026] Preferably, a reinforcing rib is arranged in the inner recessed area, and the outer end surface of the reinforcing rib is arranged in a plane with the outer wall surface of the central pipe.
[0027] In the scheme, the reinforcing rib arranged in the inner recessed area of the outer wall surface of the central pipe supports the filter membrane, so that the inner recessed area is prevented from being occupied due to the inward recess of the filter membrane under the action of water pressure, and the filtered clean water flowing out of the filter membrane can flow smoothly into the central pipe.
[0028] The utility model discloses a kind of water purifiers, including the filter core assembly as described above.
[0029] On the basis of conforming to the common sense of the art, the above-mentioned preferred conditions can be arbitrarily combined, i.e., to obtain each preferred example of the utility model.
[0030] The positive progress effect of the utility model is that:
[0031] The utility model discloses a filter assembly which is characterized by comprising a shell, a center tube, a filter inner core, a filter membrane, a first filter layer and a second filter layer. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 It is the external structure schematic drawing of filter assembly of the utility model embodiment.
[0033] Figure 2 It is the internal structure section view of filter assembly. Figure 1
[0034] Figure 3 It is the structure schematic drawing of center tube subassembly in filter assembly of the utility model embodiment.
[0035] Figure 4 It is the section view of center tube subassembly in the. Figure 3
[0036] Figure 5 It is the structure schematic drawing of shell end cover in the utility model embodiment.
[0037] Mark explanation:
[0038] Main shell 100
[0039] Clamping block 101
[0040] Shell end cover 200
[0041] First water inlet 201
[0042] First water outlet 202
[0043] Second water outlet 203
[0044] First end cover inner ring 210
[0045] Second end cover inner ring 220
[0046] End cover outer ring 230
[0047] Positioning rib 240
[0048] Filter membrane 300
[0049] First filter layer 400
[0050] Second filter layer 500
[0051] Center tube 600
[0052] Inner recessed area 601
[0053] Reinforcing rib 602
[0054] Center tube water inlet 603
[0055] Limiting plate 604
[0056] Inner end cover 700
[0057] Center tube upper end cover 800
[0058] Center tube lower end cover 900
[0059] First chamber 10
[0060] Second chamber 20
[0061] Filter inner core inner cavity 30 DETAILED DESCRIPTION
[0062] The utility model will be further illustrated by way of examples below, but the utility model is not limited to the scope of the examples.
[0063] As Figures 1-5 shown, it is the structure schematic drawing of filter core assembly in the embodiment. In the embodiment, the filter core assembly includes center tube 600 and filter membrane 300, the center tube 600 is hollow structure, and the outer peripheral surface of center tube 600 is equipped with inner recessed area 601, and filter membrane 300 is composed of nanofiltration membrane piece, screen, and flow guide cloth, and is wound on the outer periphery of center tube 600 and covers inner recessed area 601 after being stacked. The filter core assembly further includes cylindrical filter inner core, and the filter inner core is arranged in the cavity of center tube 600, and the inner cavity of filter inner core is closed at one end, and the other end of the inner cavity of filter inner core is communicated with inner recessed area 601 through fluid passage. The outer peripheral wall of filter inner core and the inner side wall of center tube 600 have first chamber 10, and the end of center tube 600 is equipped with opening, and the opening is communicated with first chamber 10.
[0064] By setting a filter inner core in the center tube 600 of the existing filter core, multiple filtration of drinking water is realized, the problem that a single filter core cannot filter harmful substances in water well due to single function is avoided, and water safety is effectively ensured. Moreover, by utilizing the internal space of center tube 600, the external volume of filter core can also be avoided to be too large, the structure of water purifier is avoided to be adjusted, and production cost is saved.
[0065] As Figure 3As shown, in the embodiment, the reinforcing ribs 602 are arranged in the inner recessed area 601 of the central tube 600, and the outer end faces of the reinforcing ribs 602 are coplanar with the outer wall surface of the central tube 600. Of course, the outer end faces of the reinforcing ribs 602 can be slightly lower than the curved surface of the outer wall surface of the central tube 600. By arranging the reinforcing ribs 602 in the inner recessed area 601 of the outer wall surface of the central tube 600, the membrane of the filter membrane 300 is supported, and the inner recessed area 601 is prevented from being recessed inward under the action of water pressure, so that the water flow space of the inner recessed area 601 is not occupied, and the filtered clean water flowing out of the filter membrane 300 can smoothly flow into the central tube 600.
[0066] The inner recessed area 601 on the outer surface of the central tube 600 extends along the axial direction of the central tube 600, and the inner recessed area 601 has multiple positions on the outer surface of the central tube 600 (in the embodiment, the inner recessed area 601 has two positions and is centrally symmetrically arranged). The reinforcing ribs 602 are in the shape of a sheet and are arranged in a cross interval along the axial direction of the central tube 600 to form a water flow channel.
[0067] As shown in Figure 3 and Figure 4 , the first end (upper end) of the central tube 600 is limited by the central tube upper end cover 800 to prevent the filter inner core from falling out of the central tube 600. The central tube upper end cover 800 is provided with an opening, and the first chamber 10 is communicated with the filtered clean water outlet outside through the opening.
[0068] The second end (lower end) of the central tube 600 is closed by the central tube lower end cover 900, and the central tube lower end cover 900 is detachably and sealingly connected to the lower end of the central tube 600 through screw threads. A gasket is arranged between the lower end of the central tube 600 and the central tube lower end cover 900, and the gasket can be made of silica gel to enhance the sealing effect. A limiting plate 604 is arranged in the inner cavity of the central tube 600 at a distance from the lower end face, and the limiting plate 604 is used to support and limit the filter inner core when the filter inner core is assembled in the central tube 600. The middle part of the limiting plate 604 is provided with a through hole corresponding to the inner cavity 30 of the filter inner core. Specifically, as shown in Figure 4 , the middle part of the limiting plate 604 has a cylindrical protrusion, and the through hole is arranged in the cylindrical protrusion, and the cylindrical protrusion is inserted into the inner cavity 30 of the filter inner core.
[0069] The inner recess region 601 of the central tube 600 is provided with a central tube water inlet 603 which is in communication with the inner cavity of the central tube 600, and the opening of the central tube water inlet 603 in the inner cavity of the central tube 600 is below the limiting plate. The preliminarily filtered clean water from the filter membrane 300 converges through the inner recess region 601 of the central tube 600, then enters the space between the limiting plate 604 and the lower end cover 900 of the central tube 600 through the central tube water inlet 603, and then enters the inner cavity 30 of the filter inner core through the through hole of the limiting plate 604.
[0070] As shown in Figure 2 and Figure 4 In the embodiment, the filter inner core includes a first filter layer 400 and a second filter layer 500, and the second filter layer 500 is wrapped on the outer peripheral side of the first filter layer 400. By arranging two filter layers, the harmful substances in the water can be better filtered. In other embodiments, the filter inner core can be one filter layer or multiple filter layers, and the filtering functions of different filter layers of the filter inner core can be the same or different. The specific arrangement structure and filtering function of the filter inner core can be arranged according to the requirements.
[0071] In the embodiment, 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 activated carbon rod can remove organic matter in the water and retain mineral matter in the water, and the functional material layer capable of filtering heavy metals can remove heavy metals, thereby solving the defects that the existing nanofiltration filter core cannot completely remove heavy metals and organic matter, and ensuring the safety of the water.
[0072] In the embodiment, the activated carbon rod is a hollow cylindrical structure. The functional material layer capable of filtering heavy metals of the second filter layer 500 can use the existing commercially available functional filter membrane, such as PP cotton (or modified PP cotton). By wrapping the functional material layer on the outer peripheral surface of the activated carbon rod, and the water flow direction is from the inside of the activated carbon, through the activated carbon rod, and then through the functional material layer, the functional material layer can effectively intercept the powder of the activated carbon, so as to avoid the activated carbon powder from entering the outlet water. The preliminarily filtered clean water entering the central tube 600 is first filtered by the activated carbon rod, then filtered by the functional filter membrane of the second filter layer 500, and then flows into the first chamber 10, and finally flows out through the clean water outlet of the filter core assembly.
[0073] As shown in Figure 2As shown, the filter core assembly further comprises a shell, the center pipe 600 is arranged in the shell, and the shell is further provided with a first water inlet 201, a first water outlet 202 and a second water outlet 203. The raw water inlet of the filter membrane 300 is in communication with the first water inlet 201, the waste water outlet of the filter membrane 300 is in communication with the first water outlet 202, and the opening is in communication with the second water outlet 203. By arranging the shell, on the one hand, the filtering material of the filter core assembly is prevented from being polluted by the outside world, thereby affecting the filtering effect, and on the other hand, the filter core assembly is conveniently arranged in the water purifier and connected with the waterway interface of the water purifier.
[0074] As shown in Figure 1 and Figure 2 In the embodiment, the shell comprises a main shell 100 and a shell end cover 200, and the shell end cover 200 is detachably and sealingly connected with the main shell 100. The first water inlet 201, the first water outlet 202 and the second water outlet 203 are arranged on the shell end cover 200, that is, the first water inlet 201, the first water outlet 202 and the second water outlet 203 are arranged at the same end of the shell, thereby facilitating the installation of the filter core. By designing the shell in a split manner, the filter core components such as the center pipe 600 can be conveniently arranged in the shell.
[0075] In other embodiments, the first water inlet 201, the first water outlet 202 and the second water outlet 203 can be arranged at different positions of the shell according to the structure of the shell, and it is necessary to pay attention to the position arrangement of the raw water inlet of the filter membrane 300, the waste water outlet and the filtered water outlet on the filter core assembly.
[0076] As shown in Figure 2 and Figure 5 In the embodiment, the shell end cover 200 comprises a first end cover inner ring 210, a second end cover inner ring 220 and an end cover outer ring 230 arranged in sequence from inside to outside, a first annular cavity is formed between the first end cover inner ring 210 and the second end cover inner ring 220, and a second annular cavity is formed between the second end cover inner ring 220 and the end cover outer ring 230. The first water inlet 201 is in communication with the second annular cavity, the first water outlet 202 is in communication with the first annular cavity, and the second water outlet 203 is in communication with a cavity formed by the first end cover inner ring 210. The filter core assembly further comprises an inner end cover 700, one end of the inner end cover 700 is sleeved on the outer circumferential surface of the filter membrane 300, and the outer circumferential surface of the other end of the inner end cover 700 is sealingly connected with the inner wall surface of the second end cover inner ring 220 through a sealing ring. The inner circumferential wall of the first end cover inner ring 210 is sealingly connected with the outer circumferential wall of the end portion of the one end of the center pipe 600 provided with the opening through a sealing ring.
[0077] 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.
[0078] like Figure 5 As shown, a cross-shaped positioning rib 240 is also provided in the cavity of the inner ring 210 of the first end cap. The positioning rib 240 is used to limit and fix the first end cap in the central tube 600. An annular groove is provided on the end face of the outer ring 230 of the end cap in the circumferential direction. When the housing end cap 200 is installed with the main housing 100, the inner and outer walls of the main housing 100 are sandwiched in the annular groove to increase the sealing effect.
[0079] 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.
[0080] like Figure 2 As 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 shell 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 through the purified water outlet of the filter membrane 300 into the concave area 601 on the central tube 600. Then, it enters the space between the limiting plate and the second end cap in the inner cavity of the central tube 600 through the central tube inlet 603 at the lower end of the concave area 601. It then enters the inner cavity 30 of the filter core through the through hole on the limiting plate. The pre-filtered purified water entering the inner cavity 30 of the filter core (i.e., the inner cavity of the activated carbon rod) passes through the first filter layer 400 and the second filter layer 500 for further filtration and flows out into the first chamber 10. Then, it enters the purified water channel formed by the inner ring 210 of the first end cap through the opening at the upper part of the central tube 600 and flows out through the second outlet 203 (purified water inlet). Wastewater generated by the filter membrane 300 is discharged from the wastewater outlet on the filter membrane 300 through the first outlet 202 (wastewater outlet).
[0081] like Figure 1As shown, the main shell 100 of the shell is further provided with a clamping block 101, which is used for positioning and limiting the filter core assembly when the filter core assembly is installed in the water purifier.
[0082] The utility model discloses a kind of water purifiers, contain filter core assembly as above.
[0083] Although the specific embodiments of the present utility model are described above, those skilled in the art should understand that this is only an example, the protection scope of the present 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 the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.
Claims
1. A filter cartridge assembly comprising a center tube and a filter membrane, the center tube being a hollow structure, an inner recessed area being provided on an outer peripheral surface of the center tube, the filter membrane being wound around the outer periphery of the center tube and covering the inner recessed area, characterized in that, The filter core assembly further comprises a cylindrical filter inner core arranged in the cavity of the center tube, 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 communicated with the inner recessed area through a fluid passage; The outer peripheral wall of the filter inner core and the inner side wall of the center tube have a first cavity, and the end of the center tube is provided with an opening communicated with the first cavity.
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 on the outer peripheral 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.
4. The filter cartridge assembly of claim 1, wherein, The filter core assembly further comprises a shell, the center tube 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 communicated with the first water inlet, the waste water outlet of the filter membrane is communicated with the first water outlet, and the opening is communicated with the second water outlet.
5. The filter cartridge assembly of claim 4 wherein, The outer peripheral surface of the filter membrane and the inner wall surface of the shell have a second cavity, 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 communicated with the raw water inlet of the filter membrane through the second cavity.
6. The filter cartridge assembly of claim 5 wherein, The first water outlet and the second water outlet are arranged at the first end of the shell.
7. The filter cartridge assembly of claim 4 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.
8. The filter cartridge assembly of claim 7 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 communicated with the second annular cavity, the first water outlet is communicated with the first annular cavity, and the second water outlet is communicated with a cavity surrounded by the first end cover inner ring; The filter core assembly further comprises an inner end cover, one end of the inner end cover is sleeved on the outer peripheral surface of the filter membrane, the outer peripheral 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, and the inner peripheral wall of the first end cover inner ring is sealingly connected with the end peripheral wall of the one end of the center tube provided with the opening.
9. The filter cartridge assembly of claim 1 wherein, The inner recessed area is provided with a reinforcing rib, and the outer end surface of the reinforcing rib is arranged in the same plane as the outer wall surface of the center tube.
10. A water purifier characterized by comprising: The filter core assembly comprises the filter core assembly according to any one of claims 1-9. The filter core assembly comprises the filter core assembly according to any one of claims 1-9.