CN210855528U - Combined type filter core assembly - Google Patents
Combined type filter core assembly Download PDFInfo
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- CN210855528U CN210855528U CN201921791809.5U CN201921791809U CN210855528U CN 210855528 U CN210855528 U CN 210855528U CN 201921791809 U CN201921791809 U CN 201921791809U CN 210855528 U CN210855528 U CN 210855528U
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Abstract
The utility model discloses a combined type filter core assembly, including leading filter element group spare, rearmounted filter element group spare and milipore filter, rearmounted filter element group spare is installed in leading filter element group spare, and the top of leading filter element group spare is equipped with and is used for the end of intaking be connected with the water source, and the top of leading filter element group spare still is equipped with the play water end that is used for with the end intercommunication of intaking of rearmounted filter element group spare, and the milipore filter sets up in leading filter element group spare bottom, and the end of intaking of milipore filter communicates with the play water end of rearmounted filter element. The utility model provides a combined type filter core assembly carries out combined type aggregate erection through leading filter element group spare, rearmounted filter element group spare and milipore filter, forms the structure of three independent part, a filter flask to through the independent safe water route guide that leading filter element group spare, rearmounted filter element group spare and milipore filter formed, carry out four or five-stage filtration's purpose through leading filter element group spare, rearmounted filter element group spare, realized reducing the quantity of filter core casing, reduce the space that the machine occupy, reduce the maintenance cost.
Description
Technical Field
The utility model relates to a water purifier technical field, in particular to combined type filter core assembly.
Background
The rear active carbon is used as an important component of the filter element of the reverse osmosis water purifier, and is generally connected at the tail end of a water path of the reverse osmosis water purifier, namely: the water passes through the pre-pretreatment filter element, such as two or three of pre-filtration PP cotton, active carbon and fine filtration PP cotton, then passes through the RO membrane fine filtration, passes through the post-filter element to improve the taste, and finally reaches the terminal for use, so that four or even five filter bottles are generally used for installing the four or five filter elements with different specifications and functions, thereby not only leading to large machine size and large occupied space, but also taking the filter elements as consumable materials and needing to be replaced regularly, a plurality of filter elements need to be replaced once more, the four filter elements need to be replaced 4 times, and the maintenance cost is increased.
Therefore, how to reduce the occupied space of the machine and solve the problem of high maintenance cost caused by the large number of the filter element shells is a technical problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a combined type filter core assembly combines leading filter core and rearmounted filter core to in addition a lesson ultrafiltration behind the rearmounted filter core optimizes filtration, reduces machine occupation space, has solved the problem that the maintenance cost is high that the quantity of filter core casing leads to much.
In order to solve the technical problem, the utility model provides a combined type filter core assembly, including leading filter element group spare, rearmounted filter element group spare and milipore filter, rearmounted filter element group spare install in the leading filter element group spare, the top of leading filter element group spare is equipped with the end of intaking that is used for being connected with the water source, the top of leading filter element group spare still be equipped with be used for with the play water end of the end intercommunication of intaking of rearmounted filter element group spare, the milipore filter set up in leading filter element group spare bottom, just the end of intaking of milipore filter with the play water end intercommunication of rearmounted filter element group spare.
Preferably, leading filter core subassembly includes leading filter core sleeve, leading filter core upper end cover, carbon-point, the cotton and leading filter core lower end cover of the folding PP of first order filter core, filter core sleeve be used for with filter flask end cover fixed connection, the cotton suit of the folding PP of first order filter core in on the carbon-point, just rearmounted filter core subassembly install in the carbon-point, leading filter core upper end cover with leading filter core lower end cover install respectively in filter core sleeve both ends.
Preferably, the rear filter element assembly comprises a rear filter element upper end cover, a rear filter element sleeve and a rear filter element lower end cover, the rear filter element upper end cover and the rear filter element lower end cover are respectively installed at two ends of the rear filter element sleeve, the rear filter element upper end cover is used for being fixedly connected with the filter flask end cover, the rear filter element upper end cover is communicated with a water outlet end of the front filter element assembly, and the rear filter element lower end cover is inserted into the upper end of the front filter element lower end cover.
Preferably, the milipore filter includes filter membrane upper end cover, filter membrane sleeve and filter membrane lower end cover, the filter membrane upper end cover with the filter membrane lower end cover install respectively in filter membrane sleeve both ends, the filter membrane upper end cover peg graft in leading filter core lower end cover lower extreme, just the filter membrane upper end cover with rearmounted filter core lower end cover intercommunication, filter membrane lower end cover be used for with filter flask fixed connection, just the filtration pore is seted up to filter membrane sleeve lateral wall.
Preferably, sealing rings are arranged at the joint of the top of the filter element sleeve and the filter bottle end cover, at the joint of the front filter element upper end cover and the filter bottle end cover, at the joint of the rear filter element upper end cover and the filter bottle end cover, at the joint of the front filter element lower end cover and the rear filter element lower end cover and at the joint of the rear filter element lower end cover and the filter film upper end cover.
Preferably, the sealing ring is an O-shaped rubber ring.
Preferably, be equipped with first water inlet, first delivery port, second water inlet and second delivery port on the filter flask end cover, first water inlet with filter core sleeve intercommunication, first delivery port with leading filter core subassembly's play water end intercommunication, the second water inlet with rearmounted filter core upper end cover intercommunication, the second delivery port with the filtration pore intercommunication.
Preferably, the first water inlet, the first water outlet, the second water inlet and the second water outlet are all provided with connecting holes, and welding-free end covers are installed at openings at the tops of the connecting holes.
Preferably, a one-way valve assembly is arranged in the connecting hole.
Preferably, the check valve assembly comprises an umbrella-shaped valve rod and a spring, the spring is sleeved at the lower end of the umbrella-shaped valve rod, and the spring is installed in the connecting hole.
The utility model provides a combined type filter core assembly mainly includes leading filter element group spare, rearmounted filter element group spare and milipore filter, and rearmounted filter element group spare is installed in leading filter element group spare, and the top of leading filter element group spare is equipped with and is used for the end of intaking be connected with the water source, and the top of leading filter element group spare still is equipped with the play water end that is used for with the end intercommunication of intaking of rearmounted filter element group spare, and the milipore filter sets up in leading filter element group spare bottom, and the end of intaking of milipore filter communicates with the play water end of rearmounted filter element. The utility model provides a combined type filter core assembly carries out combined type aggregate erection through leading filter element group spare, rearmounted filter element group spare and milipore filter, forms the structure of three independent part, a filter flask to through the independent safe water route guide that leading filter element group spare, rearmounted filter element group spare and milipore filter formed, carry out four/five filterable purposes through leading filter element group spare, rearmounted filter element group spare, realized reducing the quantity of filter core casing, reduce the space that the machine occupy, reduce the maintenance cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is an axial exploded view of the pre-filter assembly of FIG. 1;
FIG. 3 is a cross-sectional view of the overall structure shown in FIG. 1;
fig. 4 is a cross-sectional view of the end cap of the filter cartridge of fig. 3.
Wherein, in fig. 1-4:
the filter comprises a front filter element assembly-1, a front filter element sleeve-101, a front filter element upper end cover-102, a carbon rod-103, a first-stage filter element folding PP cotton-104, a front filter element lower end cover-105, a rear filter element assembly-2, a rear filter element upper end cover-201, a rear filter element sleeve-202, a rear filter element lower end cover-203, an ultrafiltration membrane-3, a filter element upper end cover-301, a filter membrane sleeve-302, a filter membrane lower end cover-303, a filter flask end cover-4, a first water inlet-401, a first water outlet-402, a second water inlet-403, a second water outlet-404, a filter flask-5, a welding-free end cover-6, a check valve assembly-7, an umbrella-shaped valve rod-701 and a spring-702.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, fig. 1 is a schematic view of an overall structure of an embodiment of the present invention; FIG. 2 is an axial exploded view of the pre-filter assembly of FIG. 1; FIG. 3 is a cross-sectional view of the overall structure shown in FIG. 1; fig. 4 is a cross-sectional view of the end cap of the filter cartridge of fig. 3. Wherein the arrows in the figure represent the direction of the water flow.
The utility model provides an among the concrete embodiment, combined type filter core assembly mainly includes leading filter element group spare 1, rearmounted filter element group spare 2 and milipore filter 3, rearmounted filter element group spare 2 is installed in leading filter element group spare 1, the top of leading filter element group spare 1 is equipped with the end of intaking that is used for being connected with the water source, the top of leading filter element group spare 1 still is equipped with the play water end that is used for with the end intercommunication of intaking of rearmounted filter element group spare 2, milipore filter 3 sets up in leading filter element group spare 1 bottom, and the end of intaking of milipore filter 3 and the play water end intercommunication of rearmounted filter element group spare 2.
The rear filter element assembly 2 is arranged in the front filter element assembly 1, the top of the front filter element assembly 1 is provided with a water inlet end used for being connected with a water source, the top of the front filter element assembly 1 is also provided with a water outlet end used for being communicated with the water inlet end of the rear filter element assembly 2, the ultrafiltration membrane 3 is arranged at the bottom of the front filter element assembly 1, and the water inlet end of the ultrafiltration membrane 3 is communicated with the water outlet end of the rear filter element assembly 2; the preposed filter element component 1 is used for connecting an external water source and introducing the external water source into the filtering structure, the preposed filter element component 1 is also used for the first-stage filtering operation of the external water source, and the preposed filter element component 1 also comprises a safe water channel for water source circulation and is used for the initial water source flowing to the preposed filter element component 1; a safe water channel is formed between the front filter element assembly 1 and the rear filter element assembly 2 and is used for guiding water to the rear filter element assembly 2; the post-positioned filter element assembly 2 is used for carrying out secondary filtering operation on an external water source, and a safe water channel for water supply source flowing is arranged in the post-positioned filter element assembly 2; a safe water channel is formed between the front sleeve and the filter element shell and is used for guiding water sources to a pressure barrel or other water storage devices.
Specifically, in the practical application process, an external water source enters the front filter element assembly 1 through the first water inlet 401, and is filled between the front filter element sleeve 101 of the front filter element assembly 1 and the first-stage filter element folding PP cotton 104 through the safety water channel of the front filter element assembly 1, at this time, the first-stage filter element folding PP cotton 104 performs first-stage filtration on the external water source, the water source after the first-stage filtration flows into the space between the front filter element assembly 1 and the rear filter element assembly 2 to form a safety water channel, the water source is drained to the first water outlet 402, at this time, the water source flows out from the first water outlet 402 and flows into the second water inlet 403, the water source enters the safety water channel inside the rear filter element assembly 2 through the second water inlet 403, the water source performs second-stage filtration, the water source after the second-stage filtration performs ultrafiltration operation through the ultrafiltration membrane 3 at the bottom of the rear filter element assembly 2, and then enters the space between the front sleeve and the filter element shell to, and finally flows out of the second water outlet 404 to a pressure tank or other water storage device.
In order to optimize the advantages of the composite filter element assembly in the above embodiments, the composite filter element assembly can perform a more sufficient and safe filtering operation, the front filter element assembly 1 includes a front filter element sleeve 101, a front filter element upper end cover 102, a carbon rod 103, a first-stage filter element folding PP cotton 104 and a front filter element lower end cover 105, the filter element sleeve 101 is used for being fixedly connected with the filter bottle end cover 4, the first-stage filter element folding PP cotton 104 is sleeved on the carbon rod 103, the rear filter element assembly 2 is installed in the carbon rod 103, and the front filter element upper end cover 102 and the front filter element lower end cover 105 are respectively installed at two ends of the filter element sleeve 101. In the middle of carrying out filterable process to external water source, the water source carries out filterable safe water course of each other, when the water source just entered into combined type filter core assembly, the water source is original water source this moment, water quality is bad, carry out the hole axle cooperation through the hole of carbon-point 103 and leading filter core lower end housing 105 with the water course before the first order is filtered, press from both sides and sheathe in leading filter core sleeve 101 after the clamp, adopt ultrasonic bonding between leading filter core sleeve 101 and the leading filter core lower end housing 105, the welding is as an organic whole, form solitary regional safe water course between at this moment the folding PP cotton 104 of first order filter core and the leading filter core sleeve 101, keep apart with other safe water courses, guaranteed that quality of water can not influence each other, improve water purifier performance. It should be noted that, after the water source is through first order filtration, can carry out the second level filtering operation, through inserting rearmounted filter element group spare 2 from leading filter element upper end cover 102 upper end mouth, let rearmounted filter element group spare 2 and the cooperation of leading filter element bottom end cover 105 hole axles, and carry out radial seal through two O type seal ring circles, make the interior safe water course of the compound filter element group spare of integral type, form solitary regional water course, keep apart with other safe water courses, guaranteed that quality of water can not influence each other, improve the water purifier performance.
According to the above-mentioned safe, filtration principle that does not influence each other, rearmounted filter core subassembly 2 includes rearmounted filter core upper end cover 201, rearmounted filter core sleeve 202 and rearmounted filter core lower end cover 203, rearmounted filter core upper end cover 201 and rearmounted filter core lower end cover 203 are installed respectively in rearmounted filter core sleeve 202 both ends, rearmounted filter core upper end cover 201 is used for with filter flask end cover 4 fixed connection, and rearmounted filter core upper end cover 201 communicates with the play water end of leading filter core subassembly 1, rearmounted filter core lower end cover 203 pegs graft in leading filter core lower end cover 105 upper end. After the water source is through first order filtering operation, can carry out second level filtering operation, leading filter core sleeve 101 also has leading filter core upper end cover 102 to carry out the hole axle cooperation, and carry out radial seal through two O type seal ring circles, prevent the water route and flow in series, form solitary regional water course, at this moment, the water source flows in second water inlet 403 through first delivery port 402, and simultaneously, because the existence of above-mentioned safe water course, the water source enters into rearmounted filter element group spare 2 through above-mentioned safe water course, carry out the second level and filter, guaranteed that quality of water can not influence each other, improve the water purifier performance.
It should be noted that the carbon rod 103 plays a role of adsorbing organic odor, but adsorbs a large amount of organic matters, which may become a hotbed for bacteria breeding, so that the ultrafiltration membrane 3 is added behind the carbon rod 103, the aperture of the ultrafiltration membrane 3 can be controlled between 0.001 μm and 0.02 μm, which is smaller than the diameter of many bacteria, to prevent bacteria from reversely entering the carbon rod 103 from the faucet, on the other hand, the breeding bacteria in the carbon rod 103 can be prevented from entering the faucet, the ultrafiltration membrane 3 comprises a filter membrane upper end cover 301, a filter membrane sleeve 302 and a filter membrane lower end cover 303, the filter membrane upper end cover 301 and the filter membrane lower end cover 303 are respectively installed at two ends of the filter membrane sleeve 302, the filter membrane upper end cover 301 is inserted at the lower end of the front filter element lower end cover 105, and the filter membrane upper end cover 301 is communicated with the rear filter element lower end cover 203, the filter membrane lower end cover 303 is used for fixedly connecting with the filter bottle 5, and the side wall of, in addition to the ultrafiltration membrane 3 serving the purpose of the essential water source, the filter membrane sleeve 302 serves to guide the water source, evacuate the water source to a position between the pre-sleeve and the filter element housing to form a safe water channel, and finally flows to a pressure tank or other water storage devices through the second water outlet 404.
Because this scheme is that the water source filters the operation, and because the characteristics of this scheme combined type filter core, the water route that the water source flows is compacter, mutual independence is very important, therefore, be provided with the sealing washer in filter core sleeve 101 top and filter flask end cover 4 junction, leading filter core upper end cover 102 and filter flask end cover 4 junction, rearmounted filter core upper end cover 201 and filter flask end cover 4 junction, leading filter core lower end cover 105 and rearmounted filter core lower end cover 203 junction and rearmounted filter core lower end cover 203 and filter membrane upper end cover 301 junction, seal the water route intercommunication through the sealing washer, can strengthen the sealing performance of combined type filter core assembly itself, guarantee that the water source can not influence each other in carrying out the secondary filter process, guarantee that quality of water can not influence each other, improve water purifier performance.
It should be noted that a first water inlet 401, a first water outlet 402, a second water inlet 403 and a second water outlet 404 are arranged on the filter flask end cover 4, the first water inlet 401 is communicated with the filter element sleeve 101, the first water outlet 402 is communicated with the water outlet end of the front filter element assembly 1, the second water inlet 403 is communicated with the rear filter element upper end cover 201, and the second water outlet 404 is communicated with the filter hole. The first water inlet 401, the first water outlet 402, the second water inlet 403 and the second water outlet 404 respectively conduct water source guiding operation with different functions, so that independence and safety of a water source in the water source filtering process are guaranteed, and the combined characteristics and the advantage of good filtering performance of the scheme are guaranteed.
Furthermore, connecting holes are formed in the first water inlet 401, the first water outlet 402, the second water inlet 403 and the second water outlet 404, and welding-free end covers 6 are installed at openings at the tops of the connecting holes; a one-way valve component 7 is arranged in the connecting hole; the check valve assembly 7 comprises an umbrella-shaped valve rod 701 and a spring 702, wherein the spring 702 is sleeved at the lower end of the umbrella-shaped valve rod 701, and the spring 702 is arranged in the connecting hole. During the water source filtering process, the water source may flow back at any time, when the filter element is not used, the spring 702 is in a natural state, and pushes the umbrella-shaped valve rod 701 to move upwards to form end face seal with the side face of the water inlet of the filter bottle end cover 4, so that a one-way effect is achieved, and the internal water is effectively prevented from flowing out; when needs use, install the filter core in the machine, the design has the boss that can push up umbrella valve rod 701 with filter flask end cover 4 complex on the machine, the boss can promote umbrella valve rod 701 downstream, compress spring 702, make umbrella valve rod 701 keep away from gradually and exempt from welding end cover 6, remove end face seal, open the mouth of a river, let it form the route, filter flask mouth design check valve subassembly 7 device can prevent that the dismouting from causing when there is water in the inside of filter core leaks, or prevent inside rivers from flowing when the filter core is idle.
To sum up, the combined type filter core assembly that this embodiment provided mainly includes leading filter element group spare, rearmounted filter element group spare and milipore filter, and rearmounted filter element group spare is installed in leading filter element group spare, and the top of leading filter element group spare is equipped with and is used for the end of intaking be connected with the water source and hold the play water end that is used for with rearmounted filter element group spare, and the milipore filter sets up in leading filter element group spare bottom, and the end intercommunication of the play water of the end of intaking of milipore filter and rearmounted filter element group spare. The utility model provides a combined type filter core assembly carries out combined type aggregate erection through leading filter element group spare, rearmounted filter element group spare and milipore filter, forms the structure of three independent part, a filter flask to through the independent safe water route guide that leading filter element group spare, rearmounted filter element group spare and milipore filter formed, carry out four/five filterable purposes through leading filter element group spare, rearmounted filter element group spare, realized reducing the quantity of filter core casing, reduce the space that the machine occupy, reduce the maintenance cost.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a combined type filter core assembly, its characterized in that, including leading filter element group spare (1), rearmounted filter element group spare (2) and milipore filter (3), rearmounted filter element group spare (2) install in leading filter element group spare (1), the top of leading filter element group spare (1) is equipped with the end of intaking that is used for being connected with the water source, the top of leading filter element group spare (1) still be equipped with be used for with the play water end of the end intercommunication of intaking of rearmounted filter element group spare (2), milipore filter (3) set up in leading filter element group spare (1) bottom, just the intake end of milipore filter (3) with the play water end intercommunication of rearmounted filter element group spare (2).
2. The combined type filter element assembly of claim 1, wherein the front filter element assembly (1) comprises a front filter element sleeve (101), a front filter element upper end cover (102), a carbon rod (103), a first-stage filter element folding PP cotton (104) and a front filter element lower end cover (105), the filter element sleeve (101) is used for being fixedly connected with the filter bottle end cover (4), the first-stage filter element folding PP cotton (104) is sleeved on the carbon rod (103), the rear filter element assembly (2) is installed in the carbon rod (103), and the front filter element upper end cover (102) and the front filter element lower end cover (105) are respectively installed at two ends of the filter element sleeve (101).
3. The combined type filter element assembly as recited in claim 2, wherein the rear filter element assembly (2) comprises a rear filter element upper end cover (201), a rear filter element sleeve (202) and a rear filter element lower end cover (203), the rear filter element upper end cover (201) and the rear filter element lower end cover (203) are respectively installed at two ends of the rear filter element sleeve (202), the rear filter element upper end cover (201) is used for being fixedly connected with the filter flask end cover (4), the rear filter element upper end cover (201) is communicated with the water outlet end of the front filter element assembly (1), and the rear filter element lower end cover (203) is inserted into the upper end of the front filter element lower end cover (105).
4. The combined type filter element assembly of claim 3, wherein the ultrafiltration membrane (3) comprises a filter membrane upper end cover (301), a filter membrane sleeve (302) and a filter membrane lower end cover (303), the filter membrane upper end cover (301) and the filter membrane lower end cover (303) are respectively installed at two ends of the filter membrane sleeve (302), the filter membrane upper end cover (301) is inserted into the lower end of the front filter element lower end cover (105), the filter membrane upper end cover (301) is communicated with the rear filter element lower end cover (203), the filter membrane lower end cover (303) is used for being fixedly connected with a filter bottle (5), and filter holes are formed in the side wall of the filter membrane sleeve (302).
5. The composite filter element assembly of claim 4, wherein sealing rings are disposed at the joint of the top of the filter element sleeve (101) and the filter flask end cover (4), the joint of the front filter element upper end cover (102) and the filter flask end cover (4), the joint of the rear filter element upper end cover (201) and the filter flask end cover (4), the joint of the front filter element lower end cover (105) and the rear filter element lower end cover (203), and the joint of the rear filter element lower end cover (203) and the filter membrane upper end cover (301).
6. The composite filter cartridge assembly of claim 5, wherein the sealing ring is an O-ring rubber.
7. The composite filter element assembly of claim 5 or 6, wherein a first water inlet (401), a first water outlet (402), a second water inlet (403) and a second water outlet (404) are provided on the filter flask end cap (4), the first water inlet (401) is communicated with the filter element sleeve (101), the first water outlet (402) is communicated with the water outlet end of the front filter element assembly (1), the second water inlet (403) is communicated with the rear filter element upper end cap (201), and the second water outlet (404) is communicated with the filter hole.
8. The composite filter element assembly of claim 7, wherein the first water inlet (401), the first water outlet (402), the second water inlet (403) and the second water outlet (404) are provided with connecting holes, and a welding-free end cover (6) is installed at the top opening of the connecting holes.
9. The composite filter cartridge assembly of claim 8, wherein a one-way valve assembly (7) is disposed in the connection hole.
10. The composite filter cartridge assembly of claim 9, wherein the one-way valve assembly (7) comprises an umbrella-shaped valve stem (701) and a spring (702), the spring (702) is sleeved on the lower end of the umbrella-shaped valve stem (701), and the spring (702) is installed in the connecting hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921791809.5U CN210855528U (en) | 2019-10-23 | 2019-10-23 | Combined type filter core assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921791809.5U CN210855528U (en) | 2019-10-23 | 2019-10-23 | Combined type filter core assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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