CN215352470U - Filter paper, filter element and air filter - Google Patents
Filter paper, filter element and air filter Download PDFInfo
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- CN215352470U CN215352470U CN202023335918.1U CN202023335918U CN215352470U CN 215352470 U CN215352470 U CN 215352470U CN 202023335918 U CN202023335918 U CN 202023335918U CN 215352470 U CN215352470 U CN 215352470U
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- filter paper
- filter
- microorganism
- filtration layer
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- 238000001914 filtration Methods 0.000 claims abstract description 132
- 244000005700 microbiome Species 0.000 claims abstract description 86
- 239000012530 fluid Substances 0.000 claims abstract description 57
- 239000010410 layer Substances 0.000 claims description 149
- 239000000835 fiber Substances 0.000 claims description 39
- 230000000813 microbial effect Effects 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229920005594 polymer fiber Polymers 0.000 claims description 13
- 239000003054 catalyst Substances 0.000 claims description 9
- 229920000728 polyester Polymers 0.000 claims description 8
- 230000000845 anti-microbial effect Effects 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000011109 contamination Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 54
- 241000894006 Bacteria Species 0.000 description 11
- 241000700605 Viruses Species 0.000 description 11
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 241000233866 Fungi Species 0.000 description 4
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 4
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- -1 Polyethylene terephthalate Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- HVCXHPPDIVVWOJ-UHFFFAOYSA-N [K].[Mn] Chemical compound [K].[Mn] HVCXHPPDIVVWOJ-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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Abstract
The present invention relates to a filter paper, a filter cartridge and an air cleaner, wherein the filter paper has a fluid inflow surface and a fluid outflow surface opposite to the fluid inflow surface, the filter paper comprising: a first microorganism filter layer arranged on one side of the fluid inflow surface; a second microorganism filter layer arranged on one side of the fluid outflow surface; and a gas filtration layer disposed between the first and second microorganism filtration layers. The technical scheme of the utility model can realize the multifunctional filtering effect of filtering microorganisms and harmful gas, and meet the diversified filtering requirements of filtering the microorganisms and the harmful gas.
Description
Technical Field
The utility model relates to the technical field of filtration, in particular to filter paper, a filter element and an air filter.
Background
Filter paper is typically provided in the filter and may be used to filter undesired substances in the fluid flowing through the filter paper. For example, in the existing air filter, the filter paper can filter out the particulate matters in the air.
However, the existing filter paper can only filter particulate matters in the air, and cannot meet more air filtering requirements.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a filter paper, a filter element and an air filter to realize diversified filtering functions and meet more filtering requirements.
In one aspect, there is provided a filter paper having a fluid inflow surface and a fluid outflow surface opposite to the fluid inflow surface, the filter paper comprising: a first microorganism filter layer arranged on one side of the fluid inflow surface; a second microorganism filter layer arranged on one side of the fluid outflow surface; and a gas filtration layer disposed between the first and second microorganism filtration layers.
In one embodiment, the fiber density of the second microbial filtration layer is greater than the fiber density of the first microbial filtration layer.
In one embodiment, the first microbial filtration layer comprises an antimicrobial fibrous layer.
In one embodiment, the first microbial filtration layer comprises a mixed layer of polyester fibers and antimicrobial fibers.
In one embodiment, the second microbial filtration layer comprises a layer of meltblown polymer fibers, an electrostatic polymer fibers or a layer of nano-polymer fibers.
In one embodiment, the gas filtration layer comprises a layer of decomposition gas catalyst particles.
In one embodiment, the gas filtration layer comprises a mixed particulate layer of activated carbon and decomposition gas catalyst.
In one embodiment, the gas filtration layer is adhered to the first and second microorganism filtration layers by adhesive layers, respectively.
In another aspect, a filter cartridge is provided, comprising a frame, and a filter paper as in any of the above embodiments, the filter paper being supported on the frame.
In a further aspect, there is provided an air cleaner comprising a housing having a cavity and a filter paper as in any of the above embodiments, the filter paper being disposed within the cavity and dividing the cavity into a dirt chamber and a cleaning chamber; wherein the fluid inflow surface faces the dirty chamber and the fluid outflow surface faces the clean chamber.
Above-mentioned filter paper, filter core and air cleaner, be provided with first microorganism filter layer, second microorganism filter layer and be located the gas filtration layer between first microorganism filter layer and the second microorganism filter layer, so, through first microorganism filter layer, the second microorganism filter layer can carry out the high efficiency to the microorganism in the fluid through filter paper and filter, and can filter the unexpected gas in the fluid through filter paper through the gas filtration layer, thereby realize not only filtering microorganism but also filtering harmful gas's multi-functional filter effect, satisfy to the virus, microorganism and harmful gas such as bacterium carry out filterable diversified filtration demand.
Drawings
FIG. 1 is a cross-sectional view of a filter paper in one embodiment of the present invention;
FIG. 2 is an image of a filter paper according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a filter paper in another embodiment of the present invention;
FIG. 4 is a cross-sectional view of a filter cartridge in an embodiment of the utility model;
fig. 5 is a cross-sectional view of an air cleaner in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" in the present invention do not denote any particular quantity or order, but rather are used to distinguish one name from another.
As shown in fig. 1 and 2, the present invention provides a filter paper 10, the filter paper 10 having a fluid inflow surface 101 and a fluid outflow surface 102 opposite to the fluid inflow surface 101, the filter paper 10 comprising: a first microbial filter layer 110 provided on the fluid inlet surface 101 side; a second microbial filter layer 120 disposed on the fluid outflow surface 102 side; and a gas filtration layer 130 disposed between first and second microorganism filtration layers 110 and 120.
The fluid refers to a substance capable of flowing, and for example, the fluid may be air. Both first and second microbial filtration layers 110, 120 are capable of filtering microorganisms, such as viruses, bacteria, and/or fungi, in a fluid. The gas filtering layer 130 can filter harmful gases in the fluid. The harmful gas refers to a gas harmful to a specific object on the side of the fluid outflow surface 102, and the specific object may be different according to the actual application, for example, if the filter paper 10 is applied to an air conditioner or a home air cleaner 30, the specific object may be a human body, and if the filter paper 10 is applied to a cathode inlet of a fuel cell, the specific object may be a component of the fuel cell.
The filter paper 10 is provided with a first microorganism filtering layer 110 on one side of the fluid inflow surface 101, a second microorganism filtering layer 120 on one side of the fluid outflow surface 102, and a gas filtering layer 130 between the first microorganism filtering layer 110 and the second microorganism filtering layer 120, and fluid can flow through the first microorganism filtering layer 110, the gas filtering layer 130, and the second microorganism filtering layer 120 in sequence. Thus, the first and second microorganism filter layers 110 and 120 can perform double-layer filtration on microorganisms in the fluid passing through the filter paper 10, and the gas filter layer 130 can filter undesired gas in the fluid passing through the filter paper 10, thereby achieving a multifunctional filtration effect of filtering both microorganisms and harmful gas, and satisfying diverse filtration requirements for filtering microorganisms such as viruses and bacteria and harmful gas.
In one embodiment, the fiber density of second microorganism filtration layer 120 is greater than the fiber density of first microorganism filtration layer 110. Both the first microorganism filtration layer 110 and the second microorganism filtration layer 120 may be formed by mixing and pressing fibers, so that the first microorganism filtration layer 110 and the second microorganism filtration layer 120 may have respective fiber densities. The fiber density of first or second microorganism filtration layer 110 or 120 characterizes how closely the fibers are distributed on first or second microorganism filtration layer 110 or 120. The different fiber densities will affect the air permeability of either first microbial filtration layer 110 or second microbial filtration layer 120. For example, the fiber density of first microbial filtration layer 110 may be configured such that the air permeability of first microbial filtration layer 110 is 1500l/m2s to 7000l/m2s, and the fiber density of second microbial filtration layer 120 may be configured such that the air permeability of second microbial filtration layer 120 is 300l/m2s to 1500l/m2And s. Referring to FIG. 3, it can be seen that the fibers of first microbial filtration layer 110 are sparsely distributed, i.e., first microbial filtration layer 110 has a lower fiber density, while the fibers of second microbial filtration layer 120 are more densely distributed, i.e., second microbial filtration layer 120 has a higher fiber density.
In this embodiment, the first microorganism filtering layer 110 has a smaller fiber density to primarily filter particulate matters, microorganisms, and the like with larger particle sizes in the fluid, and the smaller fiber density enables the first microorganism filtering layer 110 to have a relatively higher flow efficiency, so that gas in the fluid and aerosol containing microorganisms with smaller particle sizes can enter the subsequent gas filtering layer 130 through the first microorganism filtering layer 110, the gas filtering layer 130 can continue to filter harmful gas in the fluid, the remaining fluid flows through the second microorganism filtering layer 120, the second microorganism filtering layer 120 has a larger fiber density, so that the second microorganism filtering layer 120 can more efficiently retain aerosol containing microorganisms such as viruses, bacteria, or fungi on the second microorganism filtering layer 120, and finally, efficient filtration of microorganisms such as viruses, bacteria, or fungi and harmful gas in the fluid is realized, while the filter paper 10 as a whole has a lower pressure drop.
In one embodiment, first microbial filtration layer 110 comprises a layer of antimicrobial fibers. The antibacterial fiber is a fiber having a function of killing or inhibiting microorganisms, and can be any one or more of antibacterial metal materials such as silver, copper, zinc and the like, or an alloy material thereof, or other antibacterial materials. In one embodiment, for example, first microbial filtration layer 110 may include a mixed layer of polyester fibers and antimicrobial fibers, such as a mixed layer of polyester fibers and silver copper ion fibers, which may be formed by mixing and pressing polyester fibers and silver copper ion fibers. Illustratively, the first microbial filtration layer 110 may also include a mixed layer of polyester fibers and silver copper zeolite, which may be made of silver copper zeolite attached to a layer of polyester fibers. Illustratively, the polyester fiber may be a Polyethylene terephthalate (PET) fiber. The antibacterial metal fiber layer in the first microorganism filtering layer 110 can kill the microorganisms such as viruses, bacteria or fungi remained on the first microorganism filtering layer 110 in the fluid, thereby improving the filtering performance and prolonging the service life.
In one embodiment, second microbial filtration layer 120 comprises a layer of meltblown polymer fibers, electrostatic polymer fibers, or nano polymer fibers. The polymer fibers may be polypropylene (PP) fibers, for example. The melt-blown polymer fiber layer, the electrostatic polymer fiber layer or the nano polymer fiber layer has an adsorption effect on the aerosol containing viruses or bacteria, and can efficiently adsorb the aerosol of the remaining viruses or bacteria in the fluid, so that the high filtering efficiency of the filter paper 10 on the viruses or bacteria is ensured, and the overall filtering performance of the filter paper 10 is improved.
In one embodiment, gas filtration layer 130 includes a layer of decomposed gas catalyst particles. Wherein, the kind of the catalyst particles can be determined according to the harmful gas to be decomposed, thereby decomposing and adsorbing the specific harmful gas. For example, the catalyst particles may be red rock manganese zinc particles, manganese potassium ore particles, or other similar material particles having a catalytic function. In one embodiment, the gas filtration layer 130 includes a mixed particle layer of activated carbon and decomposition gas catalyst, such as a mixed particle layer of activated carbon and red rock manganese zinc, which may be made by uniformly mixing activated carbon particles and red rock manganese zinc particles. The active carbon has high gas adsorption activity, can adsorb harmful gas, the active carbon still has high specific surface area, can increase the area of contact of active carbon and red stone manganese zinc mixed particle layer and gas, promote catalytic efficiency, red stone manganese zinc is a catalyst that need not the light source, red stone manganese zinc can be to formaldehyde, ammonia, hydrogen sulfide, gas such as methanethiol carries out catalytic degradation, thereby active carbon and red stone manganese zinc mixed particle layer can realize the high-efficient filtering to formaldehyde, ammonia, hydrogen sulfide, harmful gas such as methanethiol.
In one embodiment, as shown in FIG. 3, the filter paper 10 further includes an adhesive layer 140, and the gas filtration layer 130 is adhered to the first and second microorganism filtration layers 110 and 120 through the adhesive layer 140, respectively. Specifically, one side of the gas filtration layer 130, such as the above-mentioned activated carbon and red rock manganese zinc mixed particle layer, may be adhered to the first microorganism filtration layer 110 by a glue layer 140, and the other side of the gas filtration layer 130 may be adhered to the second microorganism filtration layer 120 by another glue layer 140, so that the multi-layer structure formed by the first microorganism filtration layer 110, the gas filtration layer 130, and the second microorganism filtration layer 120 may be shaped simply and efficiently.
As shown in fig. 4, the present invention also provides a filter cartridge 20, which comprises a frame 210, and the filter paper 10 according to any of the above embodiments, wherein the filter paper 10 is supported on the frame 210. The frame 210 may serve to shape and support the filter paper 10, to prevent the filter paper 10 from being bent or deformed, and the frame 210 may also facilitate installation of the filter cartridge 20 into the air cleaner 30. Wherein the frame 210 may include a circumferential sidewall 211, and the periphery of the filter paper 10 is closely connected to the inner side of the sidewall 211, such that the sidewall 211 surrounds the periphery of the filter paper 10, and fluid can flow from one side of the frame 210 through the filter paper 10 and then flow out from the other side of the frame 210. In one embodiment, as shown in fig. 4, the frame 210 may further include a hollow bracket 212, a periphery of the hollow bracket 212 is connected to an inner side of the sidewall 211, and one side of the filter paper 10 is attached to the hollow bracket 212, for example, the hollow bracket 212 may be in a net shape, a parallel line shape, or other possible shapes, so that the support of the filter paper 10 can be enhanced by the hollow bracket 212.
In the filter element 20, the filter paper 10 is provided with the first microorganism filtering layer 110 located on the fluid inflow surface 101 side, the second microorganism filtering layer 120 located on the fluid outflow surface 102 side, and the gas filtering layer 130 located between the first microorganism filtering layer 110 and the second microorganism filtering layer 120, and the fluid can flow through the first microorganism filtering layer 110, the gas filtering layer 130, and the second microorganism filtering layer 120 in sequence and then flow out. Thus, the first and second microorganism filter layers 110 and 120 can perform double-layer filtration on microorganisms in the fluid passing through the filter paper 10, and the gas filter layer 130 can filter undesired gas in the fluid passing through the filter paper 10, thereby achieving a multifunctional filtration effect of filtering both microorganisms and harmful gas, and satisfying diverse filtration requirements for filtering microorganisms such as viruses and bacteria and harmful gas.
As shown in fig. 5, the present invention further provides an air cleaner 30, comprising a housing 310 and the filter paper 10 or the filter element 20 of any of the above embodiments, wherein the housing 310 has a cavity 320, the filter paper 10 or the filter element 20 is disposed in the cavity 320, and divides the cavity 320 into a dirty cavity 321 and a clean cavity 322; wherein the fluid inflow surface 101 faces the dirty chamber 321, and the fluid outflow surface 102 faces the clean chamber 322. Wherein the housing 310 may be opened with an inlet 311 and an outlet 312, the inlet 311 communicating the soil chamber 321 with the first external space 410 of the housing 310, and the outlet 312 communicating the cleaning chamber 322 with the second external space 420 of the housing 310.
In the air cleaner 30, the filter paper 10 is provided with the first microorganism filtering layer 110 located on one side of the fluid inflow surface 101, the second microorganism filtering layer 120 located on one side of the fluid outflow surface 102, and the gas filtering layer 130 located between the first microorganism filtering layer 110 and the second microorganism filtering layer 120, and the fluid in the dirty chamber 321 can flow through the first microorganism filtering layer 110, the gas filtering layer 130, and the second microorganism filtering layer 120 in sequence and then flow out to the clean chamber 322. Thus, the first and second microorganism filter layers 110 and 120 can perform double-layer filtration on microorganisms in the fluid passing through the filter paper 10, and the gas filter layer 130 can filter undesired gas in the fluid passing through the filter paper 10, thereby achieving a multifunctional filtration effect of filtering both microorganisms and harmful gas, and satisfying diverse filtration requirements for filtering microorganisms such as viruses and bacteria and harmful gas.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A filter paper (10), wherein the filter paper (10) has a fluid inflow surface (101) and a fluid outflow surface (102) opposite to the fluid inflow surface (101), and the filter paper (10) comprises:
a first microorganism filter layer (110) provided on the fluid inflow surface (101) side;
a second microbial filter layer (120) provided on the fluid outflow surface (102) side; and
a gas filtration layer (130) disposed between the first microorganism filtration layer (110) and the second microorganism filtration layer (120).
2. The filter paper (10) of claim 1, wherein the second microorganism filtration layer (120) has a fiber density greater than the fiber density of the first microorganism filtration layer (110).
3. Filter paper (10) according to claim 1, wherein the first microbial filtration layer (110) comprises a layer of antimicrobial fibres.
4. The filter paper (10) of claim 1, wherein the first microbial filtration layer (110) comprises a blend layer of polyester fibers and antimicrobial fibers.
5. The filter paper (10) of claim 1, wherein the second microorganism filtration layer (120) comprises a layer of meltblown polymer fibers, electrostatic polymer fibers or nano-polymer fibers.
6. The filter paper (10) as claimed in claim 1, wherein the gas filtration layer (130) comprises a layer of decomposition gas catalyst particles.
7. The filter paper (10) as claimed in claim 1, wherein the gas filtration layer (130) comprises a mixed particle layer of activated carbon and decomposition gas catalyst.
8. The filter paper (10) as claimed in claim 1, wherein the gas filtration layer (130) is adhered to the first microorganism filtration layer (110) and the second microorganism filtration layer (120) by an adhesive layer (140), respectively.
9. A filter cartridge (20) comprising a frame (210) and a filter paper (10) according to any one of claims 1 to 8, the filter paper (10) being supported on the frame (210).
10. An air cleaner (30) comprising a housing (310) and a filter paper (10) according to any one of claims 1 to 8, the housing (310) having a cavity (320), the filter paper (10) being disposed within the cavity (320) and dividing the cavity (320) into a dirt chamber (321) and a cleaning chamber (322); wherein the fluid inflow surface (101) faces the contamination chamber (321) and the fluid outflow surface (102) faces the cleaning chamber (322).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023335918.1U CN215352470U (en) | 2020-12-31 | 2020-12-31 | Filter paper, filter element and air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023335918.1U CN215352470U (en) | 2020-12-31 | 2020-12-31 | Filter paper, filter element and air filter |
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| Publication Number | Publication Date |
|---|---|
| CN215352470U true CN215352470U (en) | 2021-12-31 |
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| CN202023335918.1U Active CN215352470U (en) | 2020-12-31 | 2020-12-31 | Filter paper, filter element and air filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115682238A (en) * | 2022-11-01 | 2023-02-03 | 光谷洁净(武汉)科技有限公司 | Multifunctional simple air purifier |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115682238A (en) * | 2022-11-01 | 2023-02-03 | 光谷洁净(武汉)科技有限公司 | Multifunctional simple air purifier |
| CN115682238B (en) * | 2022-11-01 | 2023-07-04 | 光谷洁净(武汉)科技有限公司 | Multifunctional simple air purifier |
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