CN110433547A - One kind can back flush filter and its control method - Google Patents
One kind can back flush filter and its control method Download PDFInfo
- Publication number
- CN110433547A CN110433547A CN201910650936.1A CN201910650936A CN110433547A CN 110433547 A CN110433547 A CN 110433547A CN 201910650936 A CN201910650936 A CN 201910650936A CN 110433547 A CN110433547 A CN 110433547A
- Authority
- CN
- China
- Prior art keywords
- hole
- water
- water inlet
- back flush
- strainer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 142
- 238000001914 filtration Methods 0.000 claims abstract description 27
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 6
- 239000008187 granular material Substances 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
- B01D29/115—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses one kind can back flush filter and its control method, be related to filter plant technical field.This can back flush filter, including shell, strainer inside housings is set, valve seat, water inlet cylinder on valve seat is set, for connecting the connection inner sleeve of strainer and cylinder of intaking, the valve seat is equipped with water inlet, first water outlet, second water outlet, the water inlet cylinder is equipped with filtering through-hole, backwash through-hole and raw water through-hole, the raw water through-hole is connected to second water outlet, the connection inner sleeve is connected to for being connected to interior and backwash through-hole with the backwash through-hole, the shell and the water inlet cylinder, which are connected firmly, to be made the backwash through-hole select one for rotating the water inlet cylinder to be connected to the first water outlet or water inlet, realize filtering or back flush strainer.The filter can carry out back flush strainer, remove the substances such as coarse granule impurity, silt and the iron rust adhered on strainer, and not need disassembly strainer, simple to operate.
Description
Technical field
The present invention relates to filter plant technical fields, and being specifically related to one kind can back flush filter and its controlling party
Method.
Background technique
Before tap water reaches each user by pipe network, many pipelines are passed through, there are many silts, iron for pipeline the inside
The impurity such as rust, floating material influence the health status of user as being be easy to cause without filtration treatment with water pollution.Filtering
Device is a kind of coarse filtration equipment, is mainly used for filtering miscellaneous to family's water pipe and the coarse granule that equipment causes damages of paddling in tap water
Matter, silt and iron rust etc..Tap water is filtered with filter, silt, iron rust, the floating material etc. in tap water can be filtered
Large particulate matter, it is ensured that will not cause harm to the human body, and tap, electric appliance etc. are played a certain protective role.
However, general filter is in use for some time, filter core can adhere to the objects such as coarse granule impurity, silt and iron rust
Matter influences liquid communication, and water is caused to become smaller, and the filter net jam on filter core is also resulted in when serious, in order to make filter normal
It uses, the mode generallyd use is to clean cartridge removal, therefore cleaning needs to remove filter core every time, and demounting procedure is numerous
Trivial, cleaning is inconvenient, this not only increases the workload of filter service, but also often disassembly filter core is easy to cause centainly filter core
The damage of degree influences the service life of filter core.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical problem, providing one kind can back flush filter and its controlling party
Method.
To achieve the above object, the technical scheme adopted by the invention is that: one kind can back flush filter, including shell
Body, strainer, the valve seat of setting inside housings, the valve seat are equipped with water inlet, the first water outlet, the second water outlet, further include
The water inlet cylinder that is arranged on valve seat, the connection inner sleeve for connecting strainer and cylinder of intaking, the water inlet cylinder, which is equipped with, to be filtered
Through-hole, backwash through-hole and raw water through-hole, the raw water through-hole be connected to second water outlet, the connection inner sleeve with it is described
The connection of backwash through-hole is connected firmly with the water inlet cylinder for rotating for being connected to interior and backwash through-hole, the shell
The water inlet cylinder makes the backwash through-hole select first water outlet of connection, and perhaps water inlet realizes filtering or back flush
Strainer.
Further, strainer mounting groove is arranged in the connection, the strainer is arranged on the strainer mounting groove.
Further, the shell nozzle end is equipped with support level, and the support level is connect with the water inlet cylinder.
Further, the water inlet cylinder is equipped with connection convex block, and the support level is equipped with and mutually fits with the connection convex block
The connecting groove matched.
It further, further include gasket, the valve seat is equipped with seal groove, and the gasket is arranged in the seal groove
On, the water inlet cylinder is pressed on the gasket.
It further, further include flat screen, the water inlet cylinder, which is equipped with, protects recirculation hole, is arranged in the connection and institute
The connection through-hole for protecting recirculation hole connection is stated, the flat screen is arranged between guarantor's recirculation hole and the connection through-hole.
Further, the valve seat is equipped with limited block, and the water inlet cylinder is equipped with the rotation matched with the limited block
Turn position limiting structure.
It further, further include locking nut, the locking nut is arranged on the valve seat for connecting the shell
The shell is rotated relative to the valve seat with the valve seat.
It further, further include shell gasket, the shell gasket setting is connect in the locking nut with the shell
At position.
It is a kind of can back flush filter control method, which comprises
When filter is filtered, rotating the shell is connected to the filtering through-hole with the water inlet, and water is from filter
Net outside, which enters after interior is filtered, flows out through backwash through-hole from the first water outlet；
When filter carries out back flush, rotating the shell is connected to the backwash through-hole with the water inlet,
Water enters outside strainer from interior to flow out through raw water through-hole from the second water outlet after progress back flush strainer；
When the water outlet of filter raw water, rotation shell is connected to the filtering through-hole with the water inlet, and the filtering is logical
Hole is connected to the raw water through-hole flows out water from the second water outlet through raw water through-hole.
By the above-mentioned description of this invention it is found that compared with prior art, one kind provided by the invention can back flush
Filter and control method including shell, setting strainer inside housings, valve seat, the water inlet cylinder being arranged on valve seat, are used for
Connect strainer and intake cylinder connection inner sleeve, the valve seat be equipped with water inlet, the first water outlet, the second water outlet, it is described into
Water Cylinder is equipped with filtering through-hole, backwash through-hole and raw water through-hole, and the raw water through-hole is connected to second water outlet, described
Connection inner sleeve is connected to for being connected to interior and backwash through-hole, the shell and the inflow column with the backwash through-hole
Body is connected firmly makes the backwash through-hole select first water outlet of connection or water inlet for rotating the water inlet cylinder, realizes
Filter or back flush strainer.The filter can carry out back flush strainer, remove coarse granule impurity, the silt adhered on strainer
With the substances such as iron rust, and disassembly strainer is not needed, it is simple to operate.
Detailed description of the invention
Fig. 1 is that the present invention can back flush filter breaks schematic diagram；
Fig. 2 is that the present invention can back flush filter filtration condition schematic diagram；
Fig. 3 is that the present invention can back flush Filter Back Washing status diagram；
Fig. 4 is that the present invention can back flush filter valve seat schematic diagram；
Fig. 5, Fig. 6 are that the present invention can back flush filter water inlet cylinder schematic diagram；
Fig. 7, Fig. 8 are that the present invention can back flush filter connection inner sleeve schematic diagram；
Fig. 9 is that the present invention can back flush filter housings schematic diagram.
Specific embodiment
The technical solution in the present invention is clearly and completely retouched below with reference to the attached drawing in the embodiment of the present invention
It states, it is clear that the described embodiments are merely a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, should fall within the scope of the present invention.
It should be noted that term " includes " of the invention and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Referring to Fig.1 shown in -9, one kind can back flush filter, including shell 1, the strainer being arranged in inside shell 12,
Valve seat 3, the connection inner sleeve 5 for connecting strainer 2 and cylinder 4 of intaking, gasket 6, is put down at the water inlet cylinder 4 being arranged on valve seat 3
Face strainer 7, locking nut 8, shell gasket 9, the valve seat 3 are equipped with water inlet 31, the first water outlet 32, the second water outlet 33,
The water inlet cylinder 4 is equipped with filtering through-hole 41, backwash through-hole 42 and raw water through-hole 43, the raw water through-hole 43 and described second
Water outlet 33 is connected to, and the connection inner sleeve 5 is connected to for being connected to 2 inside of strainer and backwash through-hole with the backwash through-hole 42
42, the shell 1 is connected firmly with the water inlet cylinder 4 makes the backwash through-hole 42 select a company for rotating the water inlet cylinder 4
Perhaps water inlet 31 realizes that filtering or back flush strainer, the gasket 6 are arranged in the water inlet to logical first water outlet 32
Between cylinder 4 and the valve seat 3, the locking nut 8 is arranged on the valve seat 3 for connecting the shell 1 and the valve
Seat 3 enables the shell to rotate relative to the center line of the valve seat 3, and the shell gasket 9 is arranged in the locking nut 8 and institute
It states at 1 link position of shell for sealing the shell 1 at 8 link position of locking nut, prevents water from the lock
Tight nut 8 is flowed out at 1 link position of shell.
The connection inner sleeve 5 is equipped with strainer mounting groove 51, and the strainer 2 is arranged on the strainer mounting groove 51.It is described
It connects inner sleeve 5 and is equipped with support column 53, the support column 53 is connect with the water inlet cylinder 4, makes the water inlet cylinder 4 and the company
Connect between inner sleeve 5 there are cross water space 54.1 open end of shell be equipped with support level 11, the support level 11 with it is described
Cylinder 4 of intaking connects.
The water inlet cylinder 4 is equipped with connection convex block 44, and the support level 11 is equipped with and is adapted with the connection convex block 44
Connecting groove 12.The water inlet cylinder 4, which is equipped with, protects recirculation hole 45, and the connection inner sleeve 5 is equipped with to be connected with guarantor's recirculation hole 45
Logical connection through-hole 52, the flat screen 7 are arranged between guarantor's recirculation hole 45 and the connection through-hole 52.The valve seat
3 are equipped with limited block 35, and the water inlet cylinder 4 is equipped with the rotation limiting structure 46 matched with the limited block 35, the rotation
Turn the position that shell 1 rotates when two extreme positions of position limiting structure 46 respectively correspond filtering and back flush, make it is described into
The backwash through-hole 42 of water Cylinder 4 is connected to the first water outlet 32, and perhaps water inlet 31 realizes filtering or back flush filter
Net 2.
The valve seat 3 is equipped with seal groove 34, and the gasket 6 is arranged on the seal groove 34, the water inlet cylinder 4 and
The gasket 6 be in contact for prevent between the water inlet cylinder 4 and the valve seat there are gap cause filtered water and
Raw water mixes.
It is a kind of can back flush filter control method, which comprises when filter is filtered, rotate institute
Stating shell 1 is connected to the filtering through-hole 41 with the water inlet 31, and water enters inside strainer 2 outside strainer 2 to be filtered
It is flowed out by backwash through-hole 42 from the first water outlet 32；When filter carries out back flush, rotate the shell 1 make it is described
Backwash through-hole 42 is connected to the water inlet 31, and water enters outside strainer 2 inside strainer 2 after progress back flush strainer 2
It is flowed out through raw water through-hole 43 from the second water outlet 33；When the water outlet of filter raw water, rotation shell 1 make the filtering through-hole 41 and
The water inlet 31 is connected to, and the filtering through-hole 41 is connected to the raw water through-hole 43 is discharged water from second through raw water through-hole 43
Mouth 33 flows out.
Control method is more specific, when filter is filtered, rotates the shell 1, the shell 1 drives inflow column
Body 4 rotates, and is connected to the filtering through-hole 41 with the water inlet 31, water enters outside strainer 2, at this point, water is outside strainer 2
It is flowed out through backwash through-hole 42 from the first water outlet 32 after being filtered inside into strainer 2；When filter carries out back flush
When, the shell 1 is rotated, the shell 1 drives water inlet cylinder 4 to rotate, and makes the backwash through-hole 42 and the water inlet 31
Connection, water enter inside strainer 2 from backwash through-hole 42, and water enters inside strainer 2 carries out back flush strainer outside strainer 2
It is flowed out through raw water through-hole 43 from the second water outlet 33 after 2；When filter is without filtering, shell 1,1 band of shell are rotated
Dynamic water inlet cylinder 4 rotates, and is connected to the filtering through-hole 41 with the water inlet 31, and water is through raw water through-hole 43 from the second water outlet
33 outflows.
It above are only several specific embodiments of the invention, but the design concept of the present invention is not limited to this, all benefits
It is made a non-material change to the present invention, should all be belonged to behavior that violates the scope of protection of the present invention with this design.
Claims (10)
1. one kind can back flush filter, including shell, setting strainer, valve seat inside housings, it is characterised in that: described
Valve seat is equipped with water inlet, the first water outlet, the second water outlet, further includes the water inlet cylinder being arranged on valve seat, for connecting filter
The connection inner sleeve of net and water inlet cylinder, the water inlet cylinder are equipped with filtering through-hole, backwash through-hole and raw water through-hole, the raw water
Through-hole is connected to second water outlet, and the connection inner sleeve is connected to for being connected to interior and anti-with the backwash through-hole
Through-hole is rinsed, the shell and the water inlet cylinder are connected firmly makes the backwash through-hole select a company for rotating the water inlet cylinder
Perhaps water inlet realizes filtering or back flush strainer to logical first water outlet.
2. according to claim 1 can back flush filter, it is characterised in that: be arranged with strainer installation in the connection
Slot, the strainer are arranged on the strainer mounting groove.
3. according to claim 1 can back flush filter, it is characterised in that: the shell nozzle end is equipped with supporting table
Rank, the support level are connect with the water inlet cylinder.
4. according to claim 3 can back flush filter, it is characterised in that: the water inlet cylinder be equipped with connect it is convex
Block, the support level are equipped with connecting groove compatible with the connection convex block.
5. according to claim 1 can back flush filter, it is characterised in that: further include gasket, the valve seat is set
There is seal groove, the gasket is arranged on the seal groove, and the water inlet cylinder is pressed on the gasket.
6. according to claim 1 can back flush filter, it is characterised in that: it further include flat screen, the water inlet
Cylinder, which is equipped with, protects recirculation hole, and the connection through-hole being connected to guarantor's recirculation hole is arranged in the connection, and the flat screen is set
It sets between guarantor's recirculation hole and the connection through-hole.
7. according to claim 1 can back flush filter, it is characterised in that: the valve seat is equipped with limited block, institute
It states into water cylinder and is equipped with the rotation limiting structure matched with the limited block.
8. according to claim 1 can back flush filter, it is characterised in that: it further include locking nut, the locking
Nut, which is arranged on the valve seat, makes the opposite valve seat center line turn of the shell for connecting the shell and the valve seat
It is dynamic.
9. according to claim 8 can back flush filter, it is characterised in that: further include shell gasket, the shell
Gasket setting is at the locking nut and the shell link position.
10. one kind can back flush filter control method, which is characterized in that the described method includes:
When filter is filtered, rotating the shell is connected to the filtering through-hole with the water inlet, and water is outside strainer
Portion, which enters after interior is filtered, flows out through backwash through-hole from the first water outlet；
When filter carry out back flush when, rotating the shell is connected to the backwash through-hole with the water inlet, water from
Interior enters outside strainer to flow out through raw water through-hole from the second water outlet after progress back flush strainer；
When filter raw water water outlet when, rotation shell be connected to the filtering through-hole with the water inlet, the filtering through-hole and
The raw water through-hole connection flows out water from the second water outlet through raw water through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910650936.1A CN110433547B (en) | 2019-07-18 | 2019-07-18 | Filter capable of being backwashed and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910650936.1A CN110433547B (en) | 2019-07-18 | 2019-07-18 | Filter capable of being backwashed and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110433547A true CN110433547A (en) | 2019-11-12 |
| CN110433547B CN110433547B (en) | 2023-09-01 |
Family
ID=68429747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910650936.1A Active CN110433547B (en) | 2019-07-18 | 2019-07-18 | Filter capable of being backwashed and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110433547B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112546694A (en) * | 2020-11-23 | 2021-03-26 | 余泽飞 | Miniature water filter |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL109141A0 (en) * | 1994-03-28 | 1994-06-24 | Super Disc Filters Ltd | Back-flushable filters |
| CN103372341A (en) * | 2012-04-17 | 2013-10-30 | 3M创新有限公司 | Back-flush-type preposed water filter |
| CN204815881U (en) * | 2015-06-27 | 2015-12-02 | 许宏娜 | Forward type back flush filter |
| CN106139666A (en) * | 2016-08-03 | 2016-11-23 | 厦门建霖工业有限公司 | Double-layer leaching net fore filter and method of work thereof |
| CN205965197U (en) * | 2016-06-07 | 2017-02-22 | 温州市润新机械制造有限公司 | But leading filter of back flush lamination formula |
| CN206063906U (en) * | 2016-08-23 | 2017-04-05 | 江苏嘉恒环境科技有限公司 | A kind of back flushing type front defecator and water purifier |
| CN207142862U (en) * | 2017-07-10 | 2018-03-27 | 浙江康源装饰有限公司 | water filtering system |
| CN108635935A (en) * | 2018-05-09 | 2018-10-12 | 海宁美康环保科技有限公司 | A kind of cleaning method of fore filter |
| EP3398433A1 (en) * | 2017-05-02 | 2018-11-07 | Easyfirm ApS | Pond filter and method for operating the pond filter |
| CN109011807A (en) * | 2018-10-20 | 2018-12-18 | 蒋琪峰 | A kind of fore filter backwashing and detect percolating water |
| EP3482810A1 (en) * | 2017-11-09 | 2019-05-15 | Honeywell Technologies Sarl | Reverse rinsing filter and method for operating the same |
| CN210521926U (en) * | 2019-07-18 | 2020-05-15 | 厦门润创远工贸有限公司 | Filter capable of being washed reversely |
-
2019
- 2019-07-18 CN CN201910650936.1A patent/CN110433547B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL109141A0 (en) * | 1994-03-28 | 1994-06-24 | Super Disc Filters Ltd | Back-flushable filters |
| CN103372341A (en) * | 2012-04-17 | 2013-10-30 | 3M创新有限公司 | Back-flush-type preposed water filter |
| CN204815881U (en) * | 2015-06-27 | 2015-12-02 | 许宏娜 | Forward type back flush filter |
| CN205965197U (en) * | 2016-06-07 | 2017-02-22 | 温州市润新机械制造有限公司 | But leading filter of back flush lamination formula |
| CN106139666A (en) * | 2016-08-03 | 2016-11-23 | 厦门建霖工业有限公司 | Double-layer leaching net fore filter and method of work thereof |
| CN206063906U (en) * | 2016-08-23 | 2017-04-05 | 江苏嘉恒环境科技有限公司 | A kind of back flushing type front defecator and water purifier |
| EP3398433A1 (en) * | 2017-05-02 | 2018-11-07 | Easyfirm ApS | Pond filter and method for operating the pond filter |
| CN207142862U (en) * | 2017-07-10 | 2018-03-27 | 浙江康源装饰有限公司 | water filtering system |
| EP3482810A1 (en) * | 2017-11-09 | 2019-05-15 | Honeywell Technologies Sarl | Reverse rinsing filter and method for operating the same |
| CN108635935A (en) * | 2018-05-09 | 2018-10-12 | 海宁美康环保科技有限公司 | A kind of cleaning method of fore filter |
| CN109011807A (en) * | 2018-10-20 | 2018-12-18 | 蒋琪峰 | A kind of fore filter backwashing and detect percolating water |
| CN210521926U (en) * | 2019-07-18 | 2020-05-15 | 厦门润创远工贸有限公司 | Filter capable of being washed reversely |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112546694A (en) * | 2020-11-23 | 2021-03-26 | 余泽飞 | Miniature water filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110433547B (en) | 2023-09-01 |
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