CN111962267A - Filtering device and application thereof - Google Patents
Filtering device and application thereof Download PDFInfo
- Publication number
- CN111962267A CN111962267A CN201910418760.7A CN201910418760A CN111962267A CN 111962267 A CN111962267 A CN 111962267A CN 201910418760 A CN201910418760 A CN 201910418760A CN 111962267 A CN111962267 A CN 111962267A
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- water
- water inlet
- filtering
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- opening
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- 238000001914 filtration Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 155
- 238000005406 washing Methods 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000000741 silica gel Substances 0.000 claims description 11
- 229910002027 silica gel Inorganic materials 0.000 claims description 11
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/10—Filtering arrangements
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention belongs to the technical field of washing equipment, and particularly relates to a filtering device which can be independently put into water to filter and collect solid impurities. The filter device can be independently used when water quality needs to be cleaned, only needs to be put into water, can filter solid impurities in the water, is convenient and quick, and is convenient to clean after being used.
Description
Technical Field
The invention belongs to the technical field of washing equipment, and particularly relates to a filtering device and application thereof.
Background
In the washing process of the washing machine, lint, solid impurities, etc. may enter the washing water, and in order to completely clean the laundry, the lint, etc. need to be separated from the laundry in time. The existing thread scrap filtering device is generally installed inside the washing machine, the structure is complex, the installation and the disassembly are inconvenient, and the cleaning is not easy. For example, the thread scraps filtering device of the prior drum washing machine is generally arranged at the water discharging end to intercept larger foreign matters such as hair, hair clips and coins in water and prevent the large foreign matters from blocking the water discharging valve or the water discharging pump, and thread scraps and the like are discharged along with the water discharging of the washing machine. However, a large amount of thread scraps may be adhered to the laundry due to the interception of the laundry itself, and the number of times of rinsing and the amount of rinsing water are increased to remove the thread scraps adhered to the laundry, resulting in waste of time and water resources.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a filtering device and application thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a filter equipment, independently puts in the aquatic and collects solid impurity with filtering, includes the casing and locates filtration in the casing, be equipped with one-way rivers passageway between the water inlet of casing and the delivery port, so that rivers pass through the water inlet filtration the delivery port flows extremely the outside of casing.
As an embodiment, the water inlet is provided with a one-way valve, the filtering structure is arranged inside the one-way valve, and the one-way valve acts from outside to inside to open the water inlet.
In one embodiment, the one-way valve is detachably disposed at the water inlet.
As an implementation mode, the check valve comprises a fixing piece and a valve plate, the fixing piece is detachably arranged on the water inlet, the valve plate is movably connected to the fixing piece, and a limiting structure is arranged on the fixing piece so that the valve plate can swing in a one-way mode from outside to inside.
As an implementation mode, the check valve is the silica gel material structure, the silica gel material structure including locate the water inlet first opening, locate the inside second opening of casing, first opening keeps the state of opening and shutting, the second opening is opened and can be sealed in the automatic laminating under the adsorption under the rivers impact.
As an embodiment, a directional structure is arranged in the housing, and the directional structure makes a certain angle between the water inlet and the horizontal direction, so as to facilitate the water flow entering.
In one embodiment, the orientation structure makes the water inlet be in a horizontal direction or a vertical downward direction, or the water inlet is inclined downwards and forms an included angle of 0-90 degrees with the horizontal direction.
In one embodiment, the orientation structure controls the center of gravity of the filtering device to be at a set position, so that the water inlet is at an angle with the horizontal direction.
As an implementation mode, the shell is symmetrically provided with a plurality of water inlets, and a plurality of filtering structures are arranged in the shell corresponding to the water inlets.
As an implementation mode, the shell is symmetrically provided with two water inlets, and two filtering structures are arranged in the shell corresponding to the water inlets.
In one embodiment, the filter structure is a filter screen having a two-dimensional or three-dimensional structure.
As an embodiment, the filtering structure is a filtering net with a three-dimensional structure, and an opening of the filtering net is arranged at the water inlet of the casing.
In one embodiment, the housing is a grid-shaped hollow body with grid holes, and the grid holes are the water outlets; or, the casing includes the body and locates a plurality of apopores on the body, the apopore is the delivery port.
In one embodiment, the water outlet hole has a truncated cone structure, and a vertex of the truncated cone structure is disposed inside the housing.
In one embodiment, the shell is made of a flexible hydrophobic and oleophobic material and has a smooth surface.
As an embodiment, the housing has a spherical structure, the spherical structure is provided with one or more water inlets, and the orientation structure is arranged at the lower part of the housing, so that a certain angle is formed between the water inlets and the horizontal direction.
In one embodiment, the orientation structure is disposed at a lower portion of the housing along a vertical direction, so that the water inlet is in a horizontal direction.
In one embodiment, the directional structures are symmetrically arranged on two sides of the water inlet, so that the water inlet is vertically downward.
The invention also relates to the use of a filter device as described in any one of the above for washing equipment or a aquarium or a fish tank for filtering solid impurities in collected water.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
The filtering device can be independently used when water quality needs to be cleaned, can filter solid impurities in water by only putting the filtering device into water, is convenient and quick, does not need to be installed on equipment such as a washing machine and the like, and is convenient to clean after being used.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a filter apparatus of the present invention;
fig. 2 is a schematic view of another filter device according to the present invention.
In the figure: 1. a housing; 11. a water outlet hole; 2. a filter structure; 3. a water inlet; 4. a valve plate; 5. a limiting structure; 6. and (5) orientation structure.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 2, the present invention relates to a filtering apparatus, which is independently placed in water to filter and collect solid impurities, and includes a housing 1 and a filtering structure 2 disposed in the housing 1, wherein a one-way water flow channel is disposed between a water inlet 3 and a water outlet of the housing 1, so that water flows through the water inlet 3, the filtering structure 2, and the water outlet to the outside of the housing 1.
The unidirectional water flow channel can control water flow to flow through the filtering device in the direction from the water inlet 3 to the filtering structure 2 to the water outlet, and the water flow cannot flow reversely, so that solid impurities which are filtered and intercepted on the filtering structure 2 are prevented from returning to the water, and the effectiveness of water filtration is ensured.
As an implementation, the one-way water flow channel between the water inlet 3 and the water outlet of the housing 1 is implemented by the following structural settings: the water inlet 3 is provided with a one-way valve, the filter structure 2 is arranged on the inner side of the one-way valve, and the one-way valve acts from outside to inside to open the water inlet 3.
The check valve comprises a fixing piece and a valve block 4, the fixing piece is detachably arranged on the water inlet 3, the valve block 4 is movably connected onto the fixing piece, and a limiting structure 5 is arranged on the fixing piece, so that the valve block 4 swings in a one-way mode from outside to inside.
The realization mode of the one-way water flow channel is simple, a complex structure is not required to be arranged, one-way control is convenient to carry out by means of the flow of water flow, and the structural stability is good.
Or, as another embodiment, the check valve is the silica gel material structure, the silica gel material structure including locate the water inlet first opening, locate the inside second opening of casing, first opening keeps the state of opening and shutting, the second opening is opened and can be closed in the automatic laminating under the adsorption under the rivers impact.
The one-way valve may be implemented in other configurations as well, as illustrated in the specific embodiments.
The specific structural arrangement of the shell 1 or the filter structure 2, the arrangement of the water inlet 3 and the water outlet of the shell 1, and the like have various feasible implementation manners on the premise of realizing the basic concept of the invention.
The following description is given by way of example only, and not by way of limitation, with reference to certain specific embodiments of the invention in order to facilitate a better understanding of the invention.
Example 1
As shown in fig. 1, the housing 1 of the filtering apparatus according to this embodiment is a grid-shaped hollow body having grid holes, and the grid holes are the water outlets.
The latticed hollow body is provided with a water inlet 3, the water inlet 3 is connected with an inlet of a filtering device, the water inlet 3 is provided with a one-way valve, the filtering structure 2 is arranged on the inner side of the one-way valve, the one-way valve acts from outside to inside to open the water inlet 3, so that water flows through the filtering device in the direction from the water inlet 3 to the filtering structure 2 to a water outlet, then flows out through an outlet of the filtering device and finally flows out through latticed holes in the latticed hollow body. The grid holes have certain pore sizes, so that impurities can be prevented from entering the shell 1, although external water flow can enter the shell 1 through the grid holes, the solid impurities cannot be intercepted by the external water flow entering the grid holes with the filtering structures 2 to flow out due to the arrangement of the one-way valves, and the solid impurities are prevented from returning to the water flow again, so that the filtering effect is ensured.
The housing 1 described above is simple and reliable in construction, effectively achieves the object of the present invention, and can be obtained by integral casting, with low manufacturing costs.
Alternatively, the housing 1 may have other structures that have loose portions and can drain water.
The check valve comprises a fixing piece and a plate-shaped valve block 4, the fixing piece is detachably arranged on the water inlet 3, the plate-shaped valve block 4 is movably connected to the fixing piece, and the fixing piece is provided with a limiting structure 5 so that the plate-shaped valve block 4 can swing in a one-way mode from outside to inside.
Or, the check valve includes mounting and the valve block 4 that two symmetries set up, can seal when these two valve block 4 are closed water inlet 3, and water inlet 3 is located to mounting detachably, two symmetry set up the valve block 4 swing joint in on the mounting, be equipped with limit structure 5 on the mounting to the valve block 4 outside-in one-way swing that makes two symmetries set up opens water inlet 3, makes rivers get into and filters.
Example 2
As shown in fig. 2, the housing 1 of the filtering apparatus of this embodiment includes a body and a plurality of water outlets 11 disposed on the body, where the water outlets 11 are the water outlets. The body is of a solid structure except for the arrangement part of the water outlet.
Preferably, the water outlet hole 11 has a truncated cone structure, and a vertex of the truncated cone structure is disposed inside the housing 1.
The apopore 11 of this structure is when guaranteeing that the water in the casing 1 can normally be discharged, not only can prevent debris such as the line bits of the outside aquatic of casing 1 from getting into casing 1 through apopore 11 in, can avoid collecting the solid impurity in casing 1 to get into the aquatic once more through the delivery port in addition, has guaranteed filterable effect.
The check valve is the silica gel material structure, the silica gel material structure is including the first opening of locating the water inlet, locating the inside second opening of casing, first opening keeps the state of opening and shutting, the second opening is opened and can be sealed in the automatic laminating under adsorption under the rivers impact.
As a specific implementation mode, the check valve includes two or more silica gel pieces, two or more silica gel pieces constitute the first opening of locating the water inlet in one end, first opening keeps the state of opening and shutting, locates the inside other end of casing 1 and laminates each other, forms the second opening that can automatic control switching, and the second opening can receive water impact effect and open when rivers enter by water inlet 3, makes rivers get into, after rivers cross, seals under the adsorption.
For example, the second opening is automatically attached in the following manner: the magnetic element is arranged on the second opening, when water flows through the magnetic element, the second opening is opened by water flow impact, and after the water flows through the magnetic element, the peripheral walls of the second opening are mutually attached and closed under the action of magnetic adsorption.
Or, the check valve is the silica gel bag of both ends open-ended, and first end is located the water inlet 3, and the inside of casing 1 is located to the second end, the open-ended perisporium laminating of second end can be washed away by the water-washed, and after intaking, the opening of second end is because of adsorption and the opening is because of remaining moisture automatic laminating, avoids rivers reverse flow.
The one-way valve is simple in structure, realizes one-way flow of water flow, and is reliable and effective.
Example 3
This example is a further definition or optimization of example 1 or example 2.
An orientation structure 6 is arranged in the shell 1, and the orientation structure 6 enables the water inlet 3 to be at a set angle relative to the horizontal direction.
As an implementation manner, the orientation structure 6 controls the gravity center of the filtering device to be at a set position, so that the water inlet 3 is at a set angle relative to the horizontal direction, thereby facilitating the water flow entering from the water inlet 3 and improving the filtering efficiency.
Referring to fig. 1-2, one or more water inlets are arranged on the spherical structure, and the directional structure is arranged at the lower part of the shell, so that the water inlets are in a horizontal direction or a vertical downward direction, or the water inlets are inclined downwards and form an included angle of 0-90 degrees with the horizontal direction, thereby further improving the filtering efficiency.
In order to achieve the scheme, the following scheme can be adopted in principle design: the sphere center of the spherical structure is connected with the gravity center of the filtering device in a first direction, the center of the water inlet is connected with the sphere center of the spherical structure in a second direction, and the first direction and the second direction are controlled to be 0-90 degrees.
For a specific washing device, the directional structure 6 is disposed at a lower portion of the housing 1 along a vertical direction, so that the water inlet 3 is in a horizontal direction, thereby improving water flow filtering efficiency.
The vertical direction refers to the direction vertical to the horizontal plane, and the horizontal direction is the direction parallel to the horizontal plane.
For the case of being applied to another specific washing device, the directional structures 6 are symmetrically arranged on two sides of the water inlet 3, so that the water inlet 3 is vertically downward, and the water flow filtering efficiency is improved.
Example 4
This example is a further definition or optimization of example 1 or example 2 or example 3.
The filter structure 2 is a filter screen, the filter screen has a two-dimensional or three-dimensional structure, preferably, the filter structure 2 is a filter screen having a three-dimensional structure, and an opening of the filter screen is arranged at the water inlet 3 of the housing 1.
This filter screen with three-dimensional structure is formed with towards the inside direction of casing 1 by water inlet 3 and accomodates the cavity to collect the solid impurity who intercepts the filtration, the opening detachably of filter screen is located water inlet 3, the post processing of being convenient for.
The one-way valve is movably connected to the fixing piece in a hinged or other connection mode.
In order to improve the filtering effect, a plurality of water inlets 3 are arranged on the shell 1, and a filtering structure 2 is arranged in the shell 1 corresponding to each water inlet 3 respectively.
As a specific embodiment, two water inlets 3 are symmetrically arranged on the shell 1, and each water inlet 3 is correspondingly provided with one filter structure 2.
Example 5
This example discloses the use of a filtration device as described in any of examples 1-4 to be placed in a washing apparatus or a aquarium or aquarium to filter and collect solid impurities from water.
The washing device is preferably a drum washing machine, a pulsator washing machine or a dishwasher.
When the filtering device is used for filtering washing water of a pulsator washing machine, different gravity materials are selected to form the directional structure 6 of the water inlet 3, so that the filtering device floats at the middle position of the water level or on the water surface.
The filtering device for the thread scraps of the washing machine is required to be installed on the washing machine and cannot be used independently, and particularly, the filtering device for the thread scraps is required to be arranged at the water discharging end of the drum washing machine, so that the thread scraps and the like in water cannot be collected in the washing process.
The filtering device is independent of the washing machine for use, does not need to be arranged in the washing machine, only needs to be put into the washing machine together with clothes to be washed when in use, has high filtering and collecting rate on thread scraps, and is easy to clean. In addition, the directional structure of the water inlet can be adjusted to enable the filtering device to float in the middle of the water level or on the water surface, and the filtering efficiency is improved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a filter equipment, independently puts in the aquatic and collects solid impurity with filtering, includes the casing and locates filtration in the casing, its characterized in that, be equipped with one-way rivers passageway between the water inlet of casing and the delivery port to make rivers pass through the water inlet filtration the delivery port flows extremely the outside of casing.
2. The filter apparatus according to claim 1, wherein the water inlet is provided with a one-way valve, the filter structure being provided inside the one-way valve, the one-way valve acting from outside to inside to open the water inlet;
preferably, the one-way valve is detachably provided at the water inlet.
3. The filtering device as claimed in claim 2, wherein the check valve comprises a fixing member and a valve plate, the fixing member is detachably disposed at the water inlet, the valve plate is movably connected to the fixing member, and the fixing member is provided with a limiting structure so that the valve plate can swing in a single direction from outside to inside;
or, the check valve is the silica gel material structure, the silica gel material structure is including locating the first opening of water inlet, locating the inside second opening of casing, first opening keeps the state of opening and shutting, the second opening is opened and can be sealed in the automatic laminating under the adsorption under the rivers impact.
4. A filter unit according to any one of claims 1 to 3 wherein the housing has an orientation feature which provides an angle between the water inlet and the horizontal to facilitate entry of water;
preferably, the water inlet is positioned in a horizontal direction or a vertical downward direction by the directional structure, or the water inlet is inclined downwards and forms an included angle of 0-90 degrees with the horizontal direction.
5. The filtration apparatus of claim 4, wherein the orientation feature controls a center of gravity of the filtration apparatus in a set position such that the water inlet is at an angle to horizontal.
6. The filtering device according to any one of claims 1 to 3, wherein the shell is symmetrically provided with a plurality of water inlets, and a plurality of filtering structures are arranged in the shell corresponding to the water inlets;
preferably, the shell is symmetrically provided with two water inlets, and two filtering structures are arranged in the shell corresponding to the water inlets; preferably, the filtering structure is a filter screen, and the filter screen has a two-dimensional or three-dimensional structure;
preferably, the filtering structure is a filtering net with a three-dimensional structure, and the opening of the filtering net is arranged at the water inlet of the shell.
7. The filtration device of any one of claims 1 to 3, wherein the housing is a grid-like hollow body having grid openings, the grid openings being the water outlets; or, the shell comprises a body and a plurality of water outlets arranged on the body, and the water outlets are the water outlets;
preferably, the water outlet hole is provided with a cone structure, and the vertex part of the cone structure is arranged in the shell;
preferably, the shell is made of flexible hydrophobic and oleophobic material and has a smooth surface.
8. The filtration apparatus as claimed in claim 4, wherein the housing has a spherical structure, the spherical structure having one or more of the water inlets, and the orientation structure is disposed at a lower portion of the housing such that the water inlets are at an angle to the horizontal.
9. The filter apparatus of claim 4, wherein the orientation structure is disposed at a lower portion of the housing in a vertical direction such that the water inlet is in a horizontal direction;
or the directional structures are symmetrically arranged on two sides of the water inlet, so that the water inlet is vertically downward.
10. Use of a filter device according to any of claims 1-9 for washing appliances or aquarium tanks for filtering solid impurities in collected water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910418760.7A CN111962267A (en) | 2019-05-20 | 2019-05-20 | Filtering device and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910418760.7A CN111962267A (en) | 2019-05-20 | 2019-05-20 | Filtering device and application thereof |
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| CN111962267A true CN111962267A (en) | 2020-11-20 |
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| CN201910418760.7A Pending CN111962267A (en) | 2019-05-20 | 2019-05-20 | Filtering device and application thereof |
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