CN208308554U - Filter core bottle, composite filter element and the water purifier of composite filter element - Google Patents
Filter core bottle, composite filter element and the water purifier of composite filter element Download PDFInfo
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- CN208308554U CN208308554U CN201820533865.8U CN201820533865U CN208308554U CN 208308554 U CN208308554 U CN 208308554U CN 201820533865 U CN201820533865 U CN 201820533865U CN 208308554 U CN208308554 U CN 208308554U
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Abstract
The utility model discloses a kind of filter core bottle of composite filter element, including shell, upper cover, lower cover, the first central tube, the second central tube and separator, upper cover and lower cover and shell enclose confined space；Separator includes annular interconnecting piece and hollow pipe portion, and confined space is separated into the first filtering area and the second filtering area by annular interconnecting piece, and hollow pipe portion seals the first filtering area and the second filtering area；Upper cover is provided with the first water inlet, the first water outlet, the second water inlet and the second water outlet, the second cavity that the first filtering area is separated into the first cavity being connected to the first water inlet and be connected to the first water outlet by the first central tube；Second central tube protrudes into the second filtering area along the inside of hollow pipe portion and forms the third cavity being connected to the second water inlet and be connected to the 4th cavity of third cavity and the second water outlet.The invention also discloses a kind of composite filter element and water purifiers.The filter core bottle of the utility model can both reduce fraction defective, can also simplify water route.
Description
Technical field
The utility model relates to filter core equipment technical fields, filter core bottle, a kind of tool more particularly to a kind of composite filter element
There are the composite filter element and water purifier of the filter core bottle.
Background technique
General water purifier is to use compound mode that different types of filter core is combined together to improve purifying water effect.With
The development of technology, mainstream water purifier currently on the market mostly use reverse osmosis technology, filter core configuration is generally PP cotton filter element
In conjunction with preposition activated filtration core, reverse osmosis filter core and post active carbon filter core.Wherein, in order to save in water purifier shared by filter core
Space, to reduce the volume of water purifier, existing water purifier can assemble two or more above-mentioned filter core
One is to form composite filter element.Due to the particularity of reverse osmosis filter core, when three kinds of filter cores are assembled into one, it will usually by PP
Cotton filter core, preposition activated filtration core and post active carbon filter core gather together to form three-in-one composite filter element.
Using the water purifier of three-in-one composite filter element, water route flow direction is still according to PP cotton filter element, preposition activated charcoal
The sequence of filter core, reverse osmosis filter core and post active carbon filter core, thus, generally it can be arranged two in three-in-one composite filter element
Road water route Integrated Solution, so as to which external reverse osmosis diafiltration can be passed through by the water flow that PP cotton filter element and preposition activated filtration core come out
Core then enters back into post active carbon filter core.
In order to realize the setting in two-way water route, the filter core bottle of above-mentioned composite filter element is mostly by the upper housing with the first water route
It is formed by connecting with the lower case with the second water route with welding manner, wherein the inside of upper housing is mostly for the filter of PP cotton to be arranged
Core and preposition activated charcoal, and the inside of lower case is mostly for post active carbon to be arranged.The second independent water path is logical inside lower case
It crosses and same central tube is integrated in using two-way water route, central tube half is intake half water outlet, lead to that structure is complicated, processing difficulties,
High production cost.Therefore, upper housing and lower case are formed by filter core bottle with welding manner connection and bad order not only easily occur
To make filter core bottle fraction defective increase, and by the water route of integration hub pipe but also the waterway structure of the filter core bottle is complicated,
Hardly possible processing increases so as to cause the whole production cost of composite filter element.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of filter core bottle of composite filter element, comprising: the shell of both ends open
Body, upper cover, lower cover, the first central tube, the second central tube and set on the shell inside and with the shell be integrally formed
Separator, the upper cover and the lower cover sealing cover in the shell both ends and enclose confined space with the shell；Institute
Stating separator includes the annular interconnecting piece that outer peripheral edge is connect with the inner wall of the shell and the inner ring with the annular interconnecting piece
The confined space is separated by face linking and the hollow pipe portion being arranged perpendicular to the annular interconnecting piece, the annular interconnecting piece
First filtering area and the second filtering area, the hollow pipe portion protrudes into first filtering area and its end and upper cover sealing connect
It connects；The upper cover be provided with the first water inlet being respectively communicated with first filtering area and the first water outlet and for it is described
The second water inlet and the second water outlet that second filtering area is respectively communicated with, first central tube are located in first filtering area
And be placed in the hollow pipe portion, one end of first central tube connect with the upper cover and separates first filtering area
At the first cavity being connected to first water inlet and the second cavity being connected to first water outlet, first chamber
Body is connected to second cavity by the other end of first central tube；One end of second central tube is fixed on described
On upper lid, the other end of second central tube protrudes into second filtering area along the inside of the hollow pipe portion, and described second
Form the third cavity that is connected to second water inlet between central tube and the hollow pipe portion and the shell, described the
The 4th cavity for being connected to the third cavity and second water outlet is formed in the pipe of two central tubes.
Preferably, connect between the upper cover and the shell by the way that welding manner or thread connecting mode are fixed
It connects；And/or it is fixedly connected between the lower cover and the shell by welding manner or thread connecting mode；Or the shell
Body, the annular interconnecting piece and the hollow pipe portion are linked into an integrated entity structure by Shooting Technique.
Preferably, the inner surface of the upper cover is equipped with the first mounting base for fixing element kit, and described the
It is respectively equipped with connection first water inlet and the first runner of first cavity in one mounting base, is connected to described first and is discharged
Mouthful with the second flow channel of second cavity, be connected to second water inlet and the third flow channel of the third cavity and be connected to
4th runner of the 4th cavity and second water outlet.
Preferably, the inner surface of the lower cover is equipped with the second mounting base for fixing element kit.
In order to solve identical technical problem, the utility model also provides a kind of composite filter element, including above-mentioned filter core bottle.
In order to solve identical technical problem, the utility model also provides a kind of composite filter element, comprising: the first filter core group
Part, the second element kit and above-mentioned filter core bottle, first element kit are fixed on described by first mounting base
In first cavity, second element kit is fixed in the third cavity by second mounting base, first chamber
Body is connected to by first element kit with second cavity, and the third cavity passes through second element kit and institute
State the connection of the 4th cavity.
Preferably, the composite filter element further includes first annular frame and annular base, first element kit
Be fixed on the first element kit between the first annular frame and the annular base, the inner wall of the annular base and it is described in
The outer wall in blank pipe portion is tightly connected, and the first annular frame is fixed in first mounting base and in its inner wall and described first
The outer wall of heart pipe is tightly connected.
Preferably, the composite filter element further includes the second toroidal frame, and second element kit is fixed on described
Between second toroidal frame and second mounting base, second element kit is placed on second central tube, and described second
The inner wall of toroidal frame and the outer wall for second central tube for protruding into second filtering area are tightly connected, second toroidal frame
The water stream channel being connected to second element kit is formed between the annular interconnecting piece and the shell.
Preferably, second element kit further includes connecting with the inner wall of second toroidal frame and for inciting somebody to action
The water of the second element kit filtering is drained to the drainage tube of the 4th cavity.
In order to solve identical technical problem, the utility model also provides a kind of water purifier, including above-mentioned filter core bottle.
Compared with prior art, the utility model has the beneficial effects that:
The filter core bottle of the composite filter element of the utility model embodiment is by setting one for the separator and the shell
It is body formed, and the institute that the annular interconnecting piece of the separator can be formed the upper cover, the lower cover and the shell
It states confined space and is separated into first filtering area and second filtering area, and first filtering area and described second filters
Sealing can be formed with docking for the upper cover by the hollow pipe portion between area, in this way, when assembling composite filter element, it can
PP cotton (i.e. PP cotton filter element) and the first carbon-point (i.e. preposition activated charcoal) is formed by the first element kit set on described first
In filtering area, and the second element kit that the second carbon-point (i.e. post active carbon filter core) is formed is set to second filtering area
In, and using first central tube and second central tube, two water routes can be easily set in the filter core bottle,
I.e. by first water inlet to first cavity, second cavity, first water outlet the first water route and by
Second water inlet is to the second water route of the third cavity, the 4th cavity, second water outlet, to simplify institute
The waterway structure for stating filter core bottle makes it easy to process.
At the same time, due to being integrally formed, and the separation between the shell of the composite filter element and the separator
Part can form first filtering area and second filtering area of opposing seal in the shell, thus, without again
Carry out welding procedure, thus not only can to avoid filter core bottle because welding brought by bad order due to make product defect rate improve
Problem, but also can occur the risk of leak to avoid composite filter element, thus the whole production cost for reducing composite filter element.
Detailed description of the invention
Fig. 1 is the cross-sectional view of composite filter element three-in-one in the utility model embodiment, and the hollow arrow in figure is water flow
Direction；
Wherein, 100, composite filter element；1, filter core bottle；11, shell；12, upper cover；121, the first water inlet；122, first goes out
The mouth of a river；123, the second water inlet；124, the second water outlet；125, the first mounting base；13, lower cover；131, the second mounting base；2,
One element kit；21, PP cotton；22, the first carbon-point；23, first annular frame；24, annular base；3, the second element kit；31,
Second carbon-point；32, the second toroidal frame；33, water stream channel；34, drainage tube；4, separator；41, annular interconnecting piece；42, hollow
Pipe portion；5, the first central tube；6, the second central tube；7, the first filtering area；71, the first cavity；72, the second cavity；8, the second mistake
Filter area；81, third cavity；82, the 4th cavity.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Either there may also be the elements of (such as interval connection or transition connection) placed in the middle.When an element is considered as " connection "
Another element, it can be directly to another element or may be simultaneously present centering elements.When an element quilt
It is considered " to be tightly connected " another element, it, which can be, is integrally formed or is also possible to another element through welding etc.
Mode realizes connection.
As shown in Figure 1, one kind of the preferred embodiment in the utility model is three-in-one, (i.e. 21 filter core of PP cotton is combined preposition activated
Filtration core and post active carbon filter core) composite filter element 100, the filter core bottle 1 of the composite filter element 100 includes the shell of both ends open
Body 11, upper cover 12, lower cover 13 and set on the shell 11 inside and with the integrally formed separator 4 of the shell 11,
In, the upper cover 12 in the both ends of the shell 11 and encloses confined space with the shell 11 with 13 sealing cover of lower cover；
The separator 4 includes the annular interconnecting piece 41 and connect with the annular that outer peripheral edge is connect with the inner wall of the shell 11
The inner ring surface in portion 41 is connected and perpendicular to the hollow pipe portion 42 that the annular interconnecting piece 41 is arranged, and the annular interconnecting piece 41 will
The confined space is separated into the first filtering area 7 and the second filtering area 8, and the hollow pipe portion 42 protrudes into first filtering area 7
And its end and the upper cover 12 are tightly connected, and can so be made opposite between first filtering area 7 and second filtering area 8
It is independent, it influences each other to avoid the water route in two filtering areas；The upper cover 12 is provided with to be respectively communicated with first filtering area 7
The first water inlet 121 and the first water outlet 122 and connected respectively by the hollow pipe portion 42 with second filtering area 8
Logical the second water inlet 123 and the second water outlet 124, first central tube 5 are located in first filtering area 7 and are placed on institute
It states in hollow pipe portion 42, one end of first central tube 5 connect with the upper cover 12 and separates first filtering area 7
At the first cavity 71 being connected to first water inlet 121 and the second cavity 72 being connected to first water outlet 122,
First cavity 71 is connected to second cavity 72 by the other end of first central tube 5；Second central tube
6 one end is fixed in the upper cover 12, and the other end of second central tube 6 is protruded into along the inside of the hollow pipe portion 42
Second filtering area 8, between second central tube 6 and the hollow pipe portion 42 and the shell 11 formed with it is described
The third cavity 81 of second water inlet 123 connection, formed in the pipe of second central tube 6 be connected to the third cavity 81 with
4th cavity 82 of second water outlet 124.
The separator 4 as described in the filter core bottle 1 of above-mentioned composite filter element 100 be it is integrally formed with the shell 11,
And what the annular interconnecting piece 41 of the separator 4 can be formed the upper cover 12, the lower cover 13 and the shell 11
The confined space is separated into first filtering area 7 and second filtering area 8, and first filtering area 7 and described the
Sealing can be formed with docking for the upper cover 12 by the hollow pipe portion 42 between two filtering areas 8, in this way, multiple in assembling
When closing filter core 100, PP cotton 21 (i.e. PP cotton filter element) and the first carbon-point 22 (i.e. preposition activated charcoal) can be formed by the first filter
Core assembly 2 is set in first filtering area 7, and the second filter core group that the second carbon-point 31 (i.e. post active carbon filter core) is formed
Part 3 is set in second filtering area 8, and using first central tube 5 and second central tube 6, can easily be existed
Two water routes are set in the filter core bottle 1, i.e., by first water inlet 121 to first cavity 71, second cavity
72, the first water route of first water outlet 122 and by second water inlet 123 to the third cavity 81, described
Second water route of four cavitys 82, second water outlet 124 makes it easy to add to simplify the waterway structure of the filter core bottle 1
Work.
At the same time, due to being integrally formed, and institute between the shell 11 of the composite filter element 100 and the separator 4
First filtering area 7 and second filtering area 8 of opposing seal can be formed in the shell 11 by stating separator 4, because
And without carrying out welding procedure again, thus not only can be to avoid the bad order brought by the welding of filter core bottle 1 due to make product
The problem of fraction defective improves, but also the risk of leak can occur to avoid composite filter element 100, so that whole reduce composite filter element
100 production cost.
It is understood that the first element kit 2 in the present embodiment combines the first carbon-point 22 using PP cotton 21
Form, certainly in other embodiments, first element kit 2 are also possible to foldable filter element combination carbon-point, and described
The second carbon-point 31 in first carbon-point 22 and second element kit 3 in one element kit 2 can also change into
The similar materials of other performances such as grain charcoal, Carbon fibe.
In order to ensure the sealed connection between the upper cover 12 and the shell 11, illustratively, can make on described
It is tightly connected between lid 12 and the shell 11 by welding manner.Further, the lower cover 13 and the shell can also be made
It is tightly connected between body 11 by welding manner.Furthermore, it is possible to the shell 11 is arranged to hollow cylindrical, in order to subsequent
Processing.And preferably, on this basis, can make between the upper cover 12 and the shell 11 and the lower cover 13 with it is described
Welding manner sealed connection is melted by rotation between shell 11, to reduce processing cost and improve the shell 11 and the upper cover
Leakproofness and bonding strength between 12 and the lower cover 13.
The shell 11 and the separator 4 in order to facilitate processing can illustratively use Shooting Technique by the shell
Body 11, the annular interconnecting piece 41 and the hollow pipe portion 42 are processed as one structure.
The first above-mentioned element kit 2 is installed in first filtering area 7 for convenience, it can also be in the upper cover 12
Inner surface the first mounting base 125 is set, and connection first water inlet is respectively set in first mounting base 125
121 with the first runner of first cavity 71, it is connected to the second of first water outlet 122 with second cavity 72
Road, connection second water inlet 123 and the third flow channel of the third cavity 81 and it is connected to the 4th cavity 82 and institute
State the 4th runner of the second water outlet 124.
Further, it is also possible to which the second mounting base 131 is arranged in the inner surface in the lower cover 13, to facilitate in second filtering
The second above-mentioned element kit 3 is installed in area 8.
In order to enter the PP cotton 21 in first element kit 2 to by first water inlet 121 with carbon-point
Water carry out double filtration, even if first cavity 71 is connected to by first element kit 2 with second cavity 72,
Illustratively, first annular frame 23 and annular base 24 can be added in the composite filter element 100, and by the PP cotton 21
The first carbon-point 22 and the PP cotton being fixed on first carbon-point 22 between the first annular frame 23 and the annular base 24
21, so that first carbon-point 22 is placed on first central tube 5, and the PP cotton 21 surrounds first carbon-point 22, institute
The outer wall of the inner wall and the hollow pipe portion 42 of stating annular base 24 is tightly connected, and the first annular frame 23 is fixed on described
In first mounting base 125 and the outer wall of its inner wall and first central tube 5 is tightly connected.Preferably, first annular frame 23 with
First central tube 5 is integrally formed, and be can simplify structure and is facilitated processing, and avoids leak.First central tube 5 is close to described
The end of annular base 24 is configured as open end, is formed with gap between the open end and the annular base 24, so that institute
Stating can be connected between the first cavity 71 and second cavity 72 by the open end of first central tube 5, in this way, by institute
State the first water inlet 121 inflow water flow can along the first runner enter first cavity 71, and after through the PP cotton
21 and first carbon-point 22 filter step by step after by between the open end and the annular base 24 of first central tube 5
Gap enter second cavity 72, and flowed out via the second flow channel from first water outlet 122.
The water flowed out by first water outlet 122 again can be along second water inlet after external reverse osmosis filter element filtering
123 carry out the filtering of next round, the i.e. filtering of the second carbon-point 31.Specifically, second can be added in the composite filter element 100
Toroidal frame 32, and second carbon-point 31 is fixed between second toroidal frame 32 and second mounting base 131, and institute
It states the second carbon-point 31 to be placed on second central tube 6, the inner wall of second toroidal frame 32 and protrudes into second filtering area 8
The outer wall of second central tube 6 be tightly connected, second toroidal frame 32 and the annular interconnecting piece 41 and the shell
The water stream channel 33 being connected to second carbon-point 31 is formed between body 11.In this way, flowed by second water inlet 123
Water successively can enter the gap between second central tube 6 and the hollow pipe portion 42 along the third flow channel, then edge
The water stream channel 33, which enters in the third cavity 81, to be flow to after second carbon-point 31 filtering along the 4th cavity 82
It is flowed out after 4th runner from second water outlet 124.
During this, in order to allow the water flow entered in the third cavity 81 sufficiently by 31 mistake of the second carbon-point
Filter, illustratively, can also add in second element kit 3 and connect and be used for the inner wall of second toroidal frame 32
The water that second carbon-point 31 filters is drained to the drainage tube 34 of the 4th cavity 82.Drainage tube 34 and the second toroidal frame 32
Setting can be integrally formed.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change
It also should be regarded as the protection scope of the utility model into replacement.
Claims (10)
1. a kind of filter core bottle of composite filter element characterized by comprising the shell of both ends open, upper cover, lower cover, the first center
Pipe, the second central tube and set on the shell inside and with the integrally formed separator of the shell, the upper cover and institute
It states lower cover sealing cover and encloses confined space in the both ends of the shell and with the shell；The separator includes outer peripheral edge and institute
It states the annular interconnecting piece of the inner wall connection of shell and is connected and with the inner ring surface of the annular interconnecting piece perpendicular to the annular
The confined space is separated into the first filtering area and the second filtering by the hollow pipe portion of interconnecting piece setting, the annular interconnecting piece
Area, the hollow pipe portion protrudes into first filtering area and its end and the upper cover are tightly connected, and the upper cover is provided with and institute
State the first water inlet and the first water outlet that the first filtering area is respectively communicated with and for being respectively communicated with second filtering area
The second water inlet and the second water outlet, first central tube is located in first filtering area and is placed on the hollow pipe portion
On, one end of first central tube connect with the upper cover and is separated into first filtering area and first water inlet
First cavity of connection and the second cavity being connected to first water outlet, first cavity and second cavity are logical
Cross the other end connection of first central tube；One end of second central tube is fixed on the upper lid, in described second
The other end of heart pipe protrudes into second filtering area, second central tube and the hollow tube along the inside of the hollow pipe portion
The third cavity being connected to second water inlet is formed between portion and the shell, is formed in the pipe of second central tube
It is connected to the 4th cavity of the third cavity Yu second water outlet.
2. the filter core bottle of composite filter element as described in claim 1, which is characterized in that pass through between the upper cover and the shell
Welding manner or thread connecting mode are fixedly connected；And/or pass through welding manner or screw thread between the lower cover and the shell
Connection type is fixedly connected；Or the shell, the annular interconnecting piece and the hollow pipe portion are connected by Shooting Technique
It is into a single integrated structure.
3. the filter core bottle of composite filter element as described in claim 1, which is characterized in that the inner surface of the upper cover is equipped with for solid
Determine the first mounting base of element kit, connection first water inlet and first chamber are respectively equipped in first mounting base
The first runner of body, connection first water outlet and the second flow channel of second cavity, be connected to second water inlet and
The third flow channel of the third cavity and the 4th runner of connection the 4th cavity and second water outlet.
4. the filter core bottle of composite filter element as claimed in claim 3, which is characterized in that the inner surface of the lower cover is equipped with for solid
Determine the second mounting base of element kit.
5. a kind of composite filter element characterized by comprising the filter core bottle of the described in any item composite filter elements of claim 1-4.
6. a kind of composite filter element characterized by comprising described in the first element kit, the second element kit and claim 4
Filter core bottle, first element kit is fixed in first cavity by first mounting base, second filter core
Component is fixed in the third cavity by second mounting base, first cavity by first element kit with
The second cavity connection, the third cavity are connected to by second element kit with the 4th cavity.
7. composite filter element as claimed in claim 6, which is characterized in that the composite filter element further includes first annular frame and annular
Pedestal, first element kit are fixed between the first annular frame and the annular base, the annular base it is interior
The outer wall of wall and the hollow pipe portion is tightly connected, the first annular frame be fixed in first mounting base and its inner wall with
The outer wall of first central tube is tightly connected.
8. composite filter element as claimed in claim 7, which is characterized in that the composite filter element further includes the second toroidal frame, described
Second element kit is fixed between second toroidal frame and second mounting base, and second element kit is placed on described
On second central tube, the inner wall of second toroidal frame and the outer wall for second central tube for protruding into second filtering area are close
Envelope connection, forms between second toroidal frame and the annular interconnecting piece and the shell and connects with second element kit
Logical water stream channel.
9. composite filter element as claimed in claim 8, which is characterized in that second element kit further includes and second ring
The inner wall of shape frame connects and the drainage tube for the water that second element kit filters to be drained to the 4th cavity.
10. a kind of water purifier characterized by comprising the described in any item filter core bottles of claim 1-4, or according to right
It is required that the described in any item composite filter elements of 5-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820533865.8U CN208308554U (en) | 2018-04-13 | 2018-04-13 | Filter core bottle, composite filter element and the water purifier of composite filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820533865.8U CN208308554U (en) | 2018-04-13 | 2018-04-13 | Filter core bottle, composite filter element and the water purifier of composite filter element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208308554U true CN208308554U (en) | 2019-01-01 |
Family
ID=64719791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820533865.8U Active CN208308554U (en) | 2018-04-13 | 2018-04-13 | Filter core bottle, composite filter element and the water purifier of composite filter element |
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| CN (1) | CN208308554U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650472A (en) * | 2019-01-29 | 2019-04-19 | 艾欧史密斯(中国)热水器有限公司 | Filter core and purifier |
| CN112062311A (en) * | 2020-09-16 | 2020-12-11 | 佛山市芯耀环保科技有限公司 | Composite filter element and water purifier |
| CN114728224A (en) * | 2019-11-19 | 2022-07-08 | 科唯怡株式会社 | Composite filter assembly and water purifier having the same |
-
2018
- 2018-04-13 CN CN201820533865.8U patent/CN208308554U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650472A (en) * | 2019-01-29 | 2019-04-19 | 艾欧史密斯(中国)热水器有限公司 | Filter core and purifier |
| CN109650472B (en) * | 2019-01-29 | 2024-01-02 | 艾欧史密斯(中国)热水器有限公司 | Filter element and water purifying device |
| CN114728224A (en) * | 2019-11-19 | 2022-07-08 | 科唯怡株式会社 | Composite filter assembly and water purifier having the same |
| CN112062311A (en) * | 2020-09-16 | 2020-12-11 | 佛山市芯耀环保科技有限公司 | Composite filter element and water purifier |
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