CN105771396A - Pre-filter with backwash function and method for applying pre-filter - Google Patents
Pre-filter with backwash function and method for applying pre-filter Download PDFInfo
- Publication number
- CN105771396A CN105771396A CN201610159563.4A CN201610159563A CN105771396A CN 105771396 A CN105771396 A CN 105771396A CN 201610159563 A CN201610159563 A CN 201610159563A CN 105771396 A CN105771396 A CN 105771396A
- Authority
- CN
- China
- Prior art keywords
- filter element
- filter
- shell
- knob
- drive link
- 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 9
- 238000011045 prefiltration Methods 0.000 title abstract 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000919 ceramic Substances 0.000 claims abstract description 31
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims description 23
- 239000010865 sewage Substances 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 10
- 102000010637 Aquaporins Human genes 0.000 claims description 4
- 108010063290 Aquaporins Proteins 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract 6
- 238000007599 discharging Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000008213 purified water Substances 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- 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
- B01D29/117—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 outward flow filtration
-
- 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
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/08—Regeneration of the filter
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to a pre-filter with a backwash function and a method for applying the pre-filter. The pre-filter comprises a shell. A transmission rod is penetratingly arranged in the shell, a filter element is arranged on the outer peripheral side of the transmission rod, a purified water channel is formed between the outer wall of the filter element and the inner wall of the shell, a raw water channel is formed between the inner wall of the filter element and the outer wall of the transmission rod, a knob is fixedly connected onto the transmission rod, the transmission rod can rotate under the effect of the knob, a water inlet and a water outlet are formed in the knob, the knob can rotate relative to the shell so as to change water inlet sequences, a lower sleeve for fixing the filter element into the shell is arranged at the bottom of the shell, a dirt discharge opening is formed in the lower sleeve, a ceramic switch is fixedly connected with the other end of the transmission rod, and the dirt discharge opening can be opened or closed under the control of the ceramic switch. The pre-filter and the method have the advantages that the pre-filter does not need to be disassembled to be manually cleaned when dirt is discharged, accordingly, cleaning and dirt discharging work becomes simple and feasible, the pre-filter is compact in structure and convenient to produce and assemble and is environmentally friendly, safe and reliable, and electric energy can be omitted.
Description
Technical field
The present invention relates to a kind of can the fore filter of backwash and using method thereof.
Background technology
After fore filter is generally arranged on the water meter of house lead in waterpipe by people, to guarantee that user will not be damaged by a large amount of precipitated impurities produced in pipe network, and concealed pipe, faucet, electrical equipment etc. are played positive protective effect.But, existing a lot of fore filters are limit because of its operation principle so that easily adhere to dirt on its filter element inwall, not only not easy cleaning after accumulation of mud, but also can affect filter effect and the service life of filter element, thus need regular dismounting to get off, Manual-cleaning.But in modern times such allegro life and work, people's often loaded down with trivial details consuming time without regularly unpicking and washing because of its operation, after for a long time, filter element inwall will be caused to block, rust in water, float, colloidal substance will flow directly out faucet, rearmounted water purifier can be produced harmful effect, even user's health be caused very big harm.
Summary of the invention
The technical problem to be solved there is provided a kind of compact conformation, easy to use, it may be achieved what filter element carried out backwash can the fore filter of backwash and using method thereof.
Technical program of the present invention lies in: a kind of can the fore filter of backwash, including shell, it is equipped with drive link in described shell, the outer circumferential side of described drive link is provided with filter element, water purification passage is formed between outer wall and the inwall of shell of described filter element, former aquaporin is formed between inwall and the outer wall of drive link of described filter element, described drive link is fixed with the knob for rotary drive bar, described knob offers water inlet and outlet, described knob can opposite shell rotate to switch water inlet order, the bottom of described shell is provided with for by fixing for filter element trapping in the enclosure, put under described and be provided with sewage draining exit, the other end of described drive link is fixed with the ceramic switch for control of sewage disposal mouth opening and closing.
Further, described shell offers the raw water inlet communicated with the water inlet on knob and the water purification outlet communicated with outlet.
Further, described knob is connected in the enclosure by top nut, is provided with pad between described top nut and shell.
Further, the upper end of described filter element is provided with filter element upper cover, and the lower end of filter element is provided with filter element lower cover, and described filter element is connected in the enclosure by filter element upper cover and filter element lower cover.
Further, described ceramic switch includes pottery upper slice and lower ceramic sheet, and described pottery upper slice is connected with drive link and rotates along with the rotation of drive link, and described lower ceramic sheet is connected on shell by nut, and pottery upper slice can lower ceramic sheet rotate relatively.
Further, the bottom of described drive link be provided with for pottery on slice card and chimeric block, described drive link is fixed with the hairbrush group for cleaning filter element, it is 120 ° of hairbrush being distributed on drive link that described hairbrush group includes three row.
Further, described pottery upper slice offers the embedded hole for matching with the chimeric block of drive link, described pottery upper slice is further opened with several apopores, described lower ceramic sheet offers several second apopores corresponding with the apopore of pottery upper slice, described lower ceramic sheet is extended with several for by lower ceramic sheet card and be fixed on interior fixture block of trapping.
A kind of can the using method of fore filter of backwash, comprise the following steps:
(1) time for normal filtration, former water enters from the water inlet of knob, is entered back into the inner chamber of filter element by filter element upper cover, after filter course, former water impurity stays filter element surface of internal cavity, and water purification enters the water purification passage between filter element and shell, being flowed out by the outlet on knob, sewage draining exit is now closed；
(2) time for backwash, by knob 180 degree, now former water enters the water purification passage between filter element and shell, by hydraulic pressure effect, current enter filter element inner chamber by filter element and form water purification, under knob, band electric brush rotates and utilizes water purification that filter element surface of internal cavity is scrubbed, and is rinsed by impurity, simultaneously, the rotation of knob drives drive rod rotation, drive link drives again potsherd to rotate, and ceramic switch below is opened, and water and impurity spill out from sewage draining exit simultaneously.
Compared with prior art, the invention have the advantages that sewage backwash of the present invention is simple, by rotary knob, switching water inlet order is water purification passage-former aquaporin, open blowoff valve simultaneously and can realize the action of backwashing filter core inwall, make cleaning, blowdown work simple；And the replacing convenient disassembly of filter element, unscrews nut, being taken out by filter element from bottom and be replaced, it is comparatively convenient to use, and its compact conformation produces easy to assembly, does not need any electric energy, environmental protection and safe and reliable.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, patent of the present invention is further illustrated.
When Fig. 1 is normal filtration of the present invention structural representation；
Fig. 2 is structural representation during backwash state of the present invention；
Fig. 3 is the elevational schematic view of drive link and hairbrush；
Fig. 4 is the partial schematic diagram of drive link；
Fig. 5 is the structural representation of ceramic switch.
In figure: 1-pad, 2-raw water inlet, 3-filter element upper cover, 4-filter element, 5-drive link, 501-chimeric block, 6-traps, 7-lower ceramic sheet, 8-nut, 9-pottery upper slice, 10-filter element lower cover, 11-shell, 12-knob, 13-water purification outlet, 14-hairbrush, 15-top nut, 16-water inlet, 17-outlet, 18-sewage draining exit.
Detailed description of the invention
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing, it is described in detail below, but the present invention is not limited to this.
As shown in Fig. 1 ~ 5, a kind of can the fore filter of backwash, including shell 11, it is equipped with drive link 5 in described shell 11, the outer circumferential side of described drive link 5 is provided with filter element 4, water purification passage is formed between outer wall and the inwall of shell 11 of described filter element 4, former aquaporin is formed between inwall and the outer wall of drive link 5 of described filter element 4, described drive link 5 is fixed with the knob 12 for rotary drive bar 5, described knob 12 offers water inlet 16 and outlet 17, described knob 12 can opposite shell 11 rotate to switch water inlet order, the bottom of described shell 11 is provided with traps 6 for being fixed on by filter element 4 in shell 11, described trapping is provided with sewage draining exit 18 on 6, the other end of described drive link 5 is fixed with the ceramic switch for control of sewage disposal mouth 18 opening and closing.
In the present embodiment, described shell 11 offers the raw water inlet 2 communicated with the water inlet 16 on knob 12 and the water purification outlet 13 communicated with outlet 17.
In the present embodiment, described knob 12 is connected in shell 11 by top nut 15, is provided with pad 1 between described top nut 15 and shell 11.
In the present embodiment, the upper end of described filter element 4 is provided with filter element upper cover 3, and the lower end of filter element 4 is provided with filter element lower cover 10, and described filter element 4 is connected in shell 11 by filter element upper cover 3 and filter element lower cover 10.
In the present embodiment, described ceramic switch includes pottery upper slice 9 and lower ceramic sheet 7, described pottery upper slice 9 is connected with drive link 5 and rotates along with the rotation of drive link 5, and described lower ceramic sheet 7 is connected on shell 11 by nut 8, and pottery upper slice 9 can lower ceramic sheet 7 rotate relatively.
In the present embodiment, the bottom of described drive link 5 be provided with for pottery on slice 9 card and chimeric block 501, described drive link 5 is fixed with the hairbrush group for cleaning filter element 4, it is 120 ° of hairbrush being distributed on drive link 5 14 that described hairbrush group includes three row.
In the present embodiment, described pottery upper slice 9 offers the embedded hole for matching with the chimeric block 501 of drive link 5, described pottery upper slice 9 is further opened with several apopores, described lower ceramic sheet 7 offers several second apopores corresponding with the apopore of pottery upper slice 9, described lower ceramic sheet 7 is extended with several for lower ceramic sheet 7 being blocked and being fixed on the fixture block trapping in 6.
A kind of can the using method of fore filter of backwash, comprise the following steps:
(1) time for normal filtration, former water enters from the water inlet 16 of knob 12, the inner chamber of filter element 4 is entered back into by filter element upper cover 3, after filter course, former water impurity stays filter element 4 surface of internal cavity, water purification enters the water purification passage between filter element 4 and shell 11, the outlet 17 on knob 12 flow out, and sewage draining exit 18 is now closed；
(2) time for backwash, knob 12 is rotated 180 degree, and now former water enters the water purification passage between filter element 4 and shell 11, by hydraulic pressure effect, current enter filter element 4 inner chamber by filter element 4 and form water purification, knob 12 rotates lower band electric brush rotation and utilizes water purification that filter element 4 surface of internal cavity is scrubbed, and is rinsed by impurity, simultaneously, the rotation of knob 12 drives drive link 5 to rotate, drive link 5 drives again potsherd to rotate, and ceramic switch below is opened, and water and impurity spill out from sewage draining exit 18 simultaneously.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention have been further described; it is it should be understood that; the foregoing is only presently preferred embodiments of the present invention; not in order to limit the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (8)
1. one kind can the fore filter of backwash, it is characterized in that: include shell, it is equipped with drive link in described shell, the outer circumferential side of described drive link is provided with filter element, water purification passage is formed between outer wall and the inwall of shell of described filter element, former aquaporin is formed between inwall and the outer wall of drive link of described filter element, described drive link is fixed with the knob for rotary drive bar, described knob offers water inlet and outlet, described knob can opposite shell rotate to switch water inlet order, the bottom of described shell is provided with for by fixing for filter element trapping in the enclosure, put under described and be provided with sewage draining exit, the other end of described drive link is fixed with the ceramic switch for control of sewage disposal mouth opening and closing.
2. according to claim 1 a kind of can the fore filter of backwash, it is characterised in that: described shell offers the raw water inlet communicated with the water inlet on knob and the water purification outlet communicated with outlet.
3. according to claim 1 a kind of can the fore filter of backwash, it is characterised in that: described knob is connected in the enclosure by top nut, is provided with pad between described top nut and shell.
4. according to claim 1 a kind of can the fore filter of backwash, it is characterised in that: the upper end of described filter element is provided with filter element upper cover, and the lower end of filter element is provided with filter element lower cover, and described filter element is connected in the enclosure by filter element upper cover and filter element lower cover.
5. according to claim 1 a kind of can the fore filter of backwash, it is characterized in that: described ceramic switch includes pottery upper slice and lower ceramic sheet, described pottery upper slice is connected with drive link and rotates along with the rotation of drive link, described lower ceramic sheet is connected on shell by nut, and pottery upper slice can lower ceramic sheet rotate relatively.
6. according to claim 5 a kind of can the fore filter of backwash, it is characterized in that: the bottom of described drive link be provided with for pottery on slice card and chimeric block, being fixed with the hairbrush group for cleaning filter element on described drive link, it is 120 ° of hairbrush being distributed on drive link that described hairbrush group includes three row.
7. according to claim 6 a kind of can the fore filter of backwash, it is characterized in that: described pottery upper slice offers the embedded hole for matching with the chimeric block of drive link, described pottery upper slice is further opened with several apopores, described lower ceramic sheet offers several second apopores corresponding with the apopore of pottery upper slice, described lower ceramic sheet is extended with several for by lower ceramic sheet card and be fixed on interior fixture block of trapping.
8. one kind can the using method of fore filter of backwash, it is characterised in that: comprise the following steps:
1) time for normal filtration, former water enters from the water inlet of knob, is entered back into the inner chamber of filter element by filter element upper cover, after filter course, former water impurity stays filter element surface of internal cavity, and water purification enters the water purification passage between filter element and shell, being flowed out by the outlet on knob, sewage draining exit is now closed；
2) time for backwash, by knob 180 degree, now former water enters the water purification passage between filter element and shell, by hydraulic pressure effect, current enter filter element inner chamber by filter element and form water purification, under knob, band electric brush rotates and utilizes water purification that filter element surface of internal cavity is scrubbed, and is rinsed by impurity, simultaneously, the rotation of knob drives drive rod rotation, drive link drives again potsherd to rotate, and ceramic switch below is opened, and water and impurity spill out from sewage draining exit simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159563.4A CN105771396B (en) | 2016-03-21 | 2016-03-21 | A kind of fore filter backwashed and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159563.4A CN105771396B (en) | 2016-03-21 | 2016-03-21 | A kind of fore filter backwashed and its application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105771396A true CN105771396A (en) | 2016-07-20 |
| CN105771396B CN105771396B (en) | 2019-03-01 |
Family
ID=56394137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610159563.4A Expired - Fee Related CN105771396B (en) | 2016-03-21 | 2016-03-21 | A kind of fore filter backwashed and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105771396B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277502A (en) * | 2016-08-29 | 2017-01-04 | 福建金源泉科技发展有限公司 | The filter element of a kind of water purification and process for purifying water |
| CN106430424A (en) * | 2016-11-04 | 2017-02-22 | 北京四季沐歌太阳能技术集团有限公司 | Filter element backwashing device |
| CN107096266A (en) * | 2017-06-20 | 2017-08-29 | 胡雪佳 | Self-cleaning purifier |
| CN108686413A (en) * | 2018-08-12 | 2018-10-23 | 诸暨市来诺环境科技有限公司 | Novel and multifunctional fore filter |
| CN108686423A (en) * | 2018-07-19 | 2018-10-23 | 圣帝尼科技环保有限公司 | A kind of fiberglass water purifier |
| CN108905338A (en) * | 2018-09-10 | 2018-11-30 | 诸暨市来诺环境科技有限公司 | Universal directional multifunctional fore filter |
| CN108939640A (en) * | 2018-08-03 | 2018-12-07 | 邹城兖矿泰德工贸有限公司 | water impurity filter |
| CN109499169A (en) * | 2018-12-04 | 2019-03-22 | 湖南城市学院 | Multi-layered filtering element combined filtration formula water purifier |
| CN110104707A (en) * | 2019-06-11 | 2019-08-09 | 汉高(天津)技术有限公司 | Magnetic-suspension high-speed spins fore filter |
| CN112827252A (en) * | 2021-01-08 | 2021-05-25 | 玉环市红日阀门有限公司 | Back-washing pre-filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850802A (en) * | 1972-08-03 | 1974-11-26 | Bermoid Irrigation Controls | Self-cleaning filter |
| CN201840924U (en) * | 2010-07-02 | 2011-05-25 | 何建明 | Self-cleaning sewage filter |
| CN201914931U (en) * | 2009-12-17 | 2011-08-03 | 肖盛喜 | Ceramic water purifier free of disassembly for washing |
| CN105396363A (en) * | 2015-12-22 | 2016-03-16 | 福州品行科技发展有限公司 | Adjustable backwash pre-filter and usage method thereof |
| CN205613142U (en) * | 2016-03-21 | 2016-10-05 | 福建金源泉科技发展有限公司 | But leading filter of back flush |
-
2016
- 2016-03-21 CN CN201610159563.4A patent/CN105771396B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850802A (en) * | 1972-08-03 | 1974-11-26 | Bermoid Irrigation Controls | Self-cleaning filter |
| CN201914931U (en) * | 2009-12-17 | 2011-08-03 | 肖盛喜 | Ceramic water purifier free of disassembly for washing |
| CN201840924U (en) * | 2010-07-02 | 2011-05-25 | 何建明 | Self-cleaning sewage filter |
| CN105396363A (en) * | 2015-12-22 | 2016-03-16 | 福州品行科技发展有限公司 | Adjustable backwash pre-filter and usage method thereof |
| CN205613142U (en) * | 2016-03-21 | 2016-10-05 | 福建金源泉科技发展有限公司 | But leading filter of back flush |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277502A (en) * | 2016-08-29 | 2017-01-04 | 福建金源泉科技发展有限公司 | The filter element of a kind of water purification and process for purifying water |
| CN106430424A (en) * | 2016-11-04 | 2017-02-22 | 北京四季沐歌太阳能技术集团有限公司 | Filter element backwashing device |
| CN107096266A (en) * | 2017-06-20 | 2017-08-29 | 胡雪佳 | Self-cleaning purifier |
| CN108686423A (en) * | 2018-07-19 | 2018-10-23 | 圣帝尼科技环保有限公司 | A kind of fiberglass water purifier |
| CN108939640A (en) * | 2018-08-03 | 2018-12-07 | 邹城兖矿泰德工贸有限公司 | water impurity filter |
| CN108686413A (en) * | 2018-08-12 | 2018-10-23 | 诸暨市来诺环境科技有限公司 | Novel and multifunctional fore filter |
| CN108905338A (en) * | 2018-09-10 | 2018-11-30 | 诸暨市来诺环境科技有限公司 | Universal directional multifunctional fore filter |
| CN109499169A (en) * | 2018-12-04 | 2019-03-22 | 湖南城市学院 | Multi-layered filtering element combined filtration formula water purifier |
| CN110104707A (en) * | 2019-06-11 | 2019-08-09 | 汉高(天津)技术有限公司 | Magnetic-suspension high-speed spins fore filter |
| CN112827252A (en) * | 2021-01-08 | 2021-05-25 | 玉环市红日阀门有限公司 | Back-washing pre-filter |
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| Publication number | Publication date |
|---|---|
| CN105771396B (en) | 2019-03-01 |
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