CN109224841B - Composite air purification filter paper and application thereof - Google Patents
Composite air purification filter paper and application thereof Download PDFInfo
- Publication number
- CN109224841B CN109224841B CN201811215944.5A CN201811215944A CN109224841B CN 109224841 B CN109224841 B CN 109224841B CN 201811215944 A CN201811215944 A CN 201811215944A CN 109224841 B CN109224841 B CN 109224841B
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- Prior art keywords
- cylinder
- air purification
- filter paper
- layer
- purification filter
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/70—Non-metallic catalysts, additives or dopants
- B01D2255/702—Carbon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses composite air purification filter paper, which comprises the following components in sequence: the first protective layer, ozone decomposition layer, formaldehyde oxide layer, filter layer and second protective layer. The invention also provides an air purification filter cylinder which comprises the composite air purification filter paper. The composite air purification filter paper can decompose ozone, oxidize formaldehyde, filter bacteria and dust particles, and has a good air purification effect.
Description
Technical Field
The invention relates to composite air purification filter paper and application thereof.
Background
An air purification filter cylinder is a core component of an air purifier, air purification filter paper is arranged in the air purification filter cylinder, the performance of the air purification filter paper directly determines the air purification effect, the existing air purification filter paper is single in performance, and the air purification effect needs to be improved.
Disclosure of Invention
The invention aims to provide composite air purification filter paper and application thereof.
In order to achieve the above object, the present invention provides a composite air purification filter paper, comprising: the device comprises a first protective layer, an ozone decomposition layer, a formaldehyde oxidation layer, a filter layer and a second protective layer;
the first protective layer is made of flame-retardant sponge;
the ozone decomposition layer is made of activated carbon loaded with a room-temperature ozone decomposition catalyst;
the formaldehyde oxidation layer is made of activated carbon loaded with a room-temperature formaldehyde oxidation catalyst;
the filter layer is a polymer porous membrane, the aperture of the polymer porous membrane is 0.2-0.5 mu m, and the porosity is more than or equal to 95%;
the second protective layer is made of flame-retardant non-woven fabric.
Preferably, the first protective layer, the ozone decomposition layer, the formaldehyde oxidation layer, the filter layer and the second protective layer which are sequentially stacked are compounded together through an adhesive process.
The invention also provides an air purification filter cylinder which comprises the composite air purification filter paper.
Preferably, the composite air purification filter paper is cylindrical.
Preferably, the cylindrical air purification filter paper comprises, laminated in order from inside to outside: the first protective layer, ozone decomposition layer, formaldehyde oxide layer, filter layer and second protective layer.
Preferably, the cylindrical air purification filter paper comprises, in order from outside to inside: the first protective layer, ozone decomposition layer, formaldehyde oxide layer, filter layer and second protective layer.
Preferably, the air cleaning filter cartridge comprises a cylindrical main cylinder;
the main cylinder body comprises a cylinder body and a cylinder cover, wherein the cylinder body is sleeved from inside to outside in sequence: the air purifier comprises a cylindrical inner net barrel, a cylindrical composite air purification filter paper and a cylindrical outer net barrel; the inner wall of the cylindrical composite air purification filter paper is attached to the outer wall of the inner mesh cylinder, and the outer wall of the cylindrical composite air purification filter paper is attached to the inner wall of the outer mesh cylinder; the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are assembled together through a pair of annular end covers, the pair of end covers and the inner net cylinder share the same axis, and the two axial ends of the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are respectively sealed by the pair of end covers.
Preferably, the pair of end covers are respectively provided with circular slots, and the circular slots and the end covers where the circular slots are located share the same axis; the axial two ends of the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are respectively inserted into the circular slots of the pair of end covers.
Preferably, the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are detachably connected with the pair of end covers.
Preferably, a semi-cylindrical surface-shaped baffle is arranged inside the main cylinder body, and the cylindrical surface where the baffle is located and the inner cylinder are coaxial; the outer wall of the baffle plate is attached to the inner wall of the inner mesh cylinder, and the outer wall of the baffle plate is in sliding fit with the inner wall of the inner mesh cylinder; the axial two ends of the baffle plate are correspondingly attached to the end covers one by one, and the axial two ends of the baffle plate are correspondingly matched with the end covers in a sliding manner one by one;
the baffle is furnished with: the rotating shaft drives the baffle to rotate around the axis of the inner cylinder; the rotating shaft and the inner mesh cylinder share the same axis, the baffle is positioned between the rotating shaft and the inner mesh cylinder, and the inner wall of the baffle is connected with the rotating shaft through a connecting rod;
one end of the rotating shaft is provided with a motor for driving the rotating shaft to rotate; the motor is arranged in the inner ring of one end cover, the motor is connected with the end cover through a support rod, and the support rod is arranged on the outer side of the baffle.
The composite air purification filter paper has the following characteristics:
1) the ozone decomposition layer is made of activated carbon carrying a room temperature ozone decomposition catalyst, and can decompose ozone at room temperature.
2) The formaldehyde oxidation layer is made of activated carbon carrying a room temperature formaldehyde oxidation catalyst and can oxidize formaldehyde at room temperature.
3) The filter layer is a polymer porous membrane, the aperture of the polymer porous membrane is 0.2-0.5 mu m, the porosity is more than or equal to 95%, and the filter layer can filter bacteria and dust particles.
4) The first protective layer is flame-retardant sponge and can protect the ozonolysis layer.
5) The second protective layer is flame-retardant non-woven fabric and can protect the filter layer.
Therefore, the composite air purification filter paper provided by the invention can decompose ozone, oxidize formaldehyde, filter bacteria and dust particles, and has a good air purification effect.
The air purification filter cylinder provided by the invention adopts the cylindrical composite air purification filter paper, has the capabilities of decomposing ozone, oxidizing formaldehyde and filtering bacteria and dust particles, and has a good air purification effect.
When air needs to be purified, the air firstly enters the main cylinder body of the air purification filter cylinder, then sequentially passes through the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder, and finally is discharged to the outside of the air purification filter cylinder.
The semi-cylindrical baffle is arranged in the main cylinder body of the air purification filter cylinder, the outer wall of the baffle is attached to the inner wall of the inner net cylinder, the rotating shaft can drive the baffle to rotate around the axial center of the inner net cylinder, so that the baffle can be circularly swept on the inner wall of the inner net cylinder, half of the inner wall of the inner net cylinder is always covered by the baffle, the shielding area (the area covered by the baffle on the inner wall of the inner net cylinder) of the inner net cylinder circularly moves along the circumferential direction of the inner net cylinder/main cylinder body, and the ventilation area (the area uncovered by the baffle on the inner wall of the inner net cylinder for air to permeate) of the inner net cylinder also circularly moves along the circumferential direction of the inner net cylinder/main cylinder body:
1) the air outlet area of the air purification filter cylinder is basically opposite to the baffle, namely the air exhaust direction of the air purification filter cylinder can circularly move along the circumferential direction of the inner mesh cylinder/main cylinder body, so that the air purifier can realize circumferential circular exhaust conveniently.
2) The cylindrical composite air purification filter paper mainly purifies gas entering from a ventilation area, and because the inner net cylinder also has a shielding area, the whole cylindrical composite air purification filter paper is not in the same working strength, the cylindrical composite air purification filter paper has a bottom working strength area (the bottom working strength area corresponds to the shielding area), and the bottom working strength area circularly moves along the circumferential direction of the inner net cylinder/main cylinder, namely the cylindrical composite air purification filter paper is always in alternating circulation of 'working' and 'rest' in the circumferential direction, so that the service life of the cylindrical composite air purification filter paper can be prolonged, and the use cost of a user is reduced.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
A composite air purification filter paper comprising, in order stacked: the device comprises a first protective layer, an ozone decomposition layer, a formaldehyde oxidation layer, a filter layer and a second protective layer;
the first protective layer is made of flame-retardant sponge;
the ozone decomposition layer is made of activated carbon loaded with a room-temperature ozone decomposition catalyst;
the formaldehyde oxidation layer is made of activated carbon loaded with a room-temperature formaldehyde oxidation catalyst;
the filter layer is a polymer porous membrane, the aperture of the polymer porous membrane is 0.2-0.5 mu m, and the porosity is more than or equal to 95%;
the second protective layer is made of flame-retardant non-woven fabric.
Example 2
A composite air purification filter paper based on example 1, except that:
the first protective layer, the ozone decomposition layer, the formaldehyde oxidation layer, the filtering layer and the second protective layer which are sequentially stacked are compounded together through an adhesive process.
Example 3
An air cleaning filter cartridge comprising the composite air cleaning filter paper of example 1 or 2.
Example 4
An air cleaning filter cartridge, which is different from the filter cartridge of example 3 in that:
the composite air purification filter paper is cylindrical.
Example 5
An air cleaning filter cartridge, which is different from the filter cartridge of example 4 in that:
the cylindrical air purification filter paper comprises the following components which are sequentially stacked from inside to outside: the first protective layer, ozone decomposition layer, formaldehyde oxide layer, filter layer and second protective layer.
Example 6
An air cleaning filter cartridge, which is different from the filter cartridge of example 4 in that:
the cylindrical air purification filter paper comprises the following components which are sequentially stacked from outside to inside: the first protective layer, ozone decomposition layer, formaldehyde oxide layer, filter layer and second protective layer.
Example 7
An air cleaning filter cartridge, which is different from the filter cartridge of example 5 or 6 in that:
the air purification filter cartridge comprises a cylindrical main cylinder;
the main cylinder body comprises a cylinder body and a cylinder cover, wherein the cylinder body is sleeved from inside to outside in sequence: the air purifier comprises a cylindrical inner net barrel, a cylindrical composite air purification filter paper and a cylindrical outer net barrel; the inner wall of the cylindrical composite air purification filter paper is attached to the outer wall of the inner mesh cylinder, and the outer wall of the cylindrical composite air purification filter paper is attached to the inner wall of the outer mesh cylinder; the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are assembled together through a pair of annular end covers, the pair of end covers and the inner net cylinder share the same axis, and the two axial ends of the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are respectively sealed by the pair of end covers.
Example 8
An air cleaning filter cartridge, which is different from the filter cartridge of example 7 in that:
the pair of end covers are respectively provided with a circular slot, and the circular slots and the end covers where the circular slots are located share the same axis; the axial two ends of the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are respectively inserted into the circular slots of the pair of end covers.
Example 9
An air cleaning filter cartridge, which is different from the filter cartridge of example 7 or 8 in that:
the inner net cylinder, the cylindrical composite air purification filter paper, the outer net cylinder and the pair of end covers are detachably connected.
Example 10
An air cleaning cartridge, which is different from the air cleaning cartridges of examples 7, 8 or 9 in that:
a semi-cylindrical surface baffle is arranged in the main cylinder body, and the cylindrical surface where the baffle is located and the inner cylinder share the axis; the outer wall of the baffle plate is attached to the inner wall of the inner mesh cylinder, and the outer wall of the baffle plate is in sliding fit with the inner wall of the inner mesh cylinder; the axial two ends of the baffle plate are correspondingly attached to the end covers one by one, and the axial two ends of the baffle plate are correspondingly matched with the end covers in a sliding manner one by one;
the baffle is furnished with: the rotating shaft drives the baffle to rotate around the axis of the inner cylinder; the rotating shaft and the inner mesh cylinder share the same axis, the baffle is positioned between the rotating shaft and the inner mesh cylinder, and the inner wall of the baffle is connected with the rotating shaft through a connecting rod;
one end of the rotating shaft is provided with a motor for driving the rotating shaft to rotate; the motor is arranged in the inner ring of one end cover, the motor is connected with the end cover through a support rod, and the support rod is arranged on the outer side of the baffle.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. An air cleaning filter cartridge, characterized by comprising a cylindrical main cylinder;
the main cylinder body comprises a cylinder body and a cylinder cover, wherein the cylinder body is sleeved from inside to outside in sequence: the air purifier comprises a cylindrical inner net barrel, a cylindrical composite air purification filter paper and a cylindrical outer net barrel; the inner wall of the cylindrical composite air purification filter paper is attached to the outer wall of the inner mesh cylinder, and the outer wall of the cylindrical composite air purification filter paper is attached to the inner wall of the outer mesh cylinder; the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are assembled together through a pair of annular end covers, the pair of end covers and the inner net cylinder share the same axis, and the two axial ends of the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are respectively sealed by the pair of end covers;
a semi-cylindrical surface baffle is arranged in the main cylinder body, and the cylindrical surface where the baffle is located and the inner cylinder share the axis; the outer wall of the baffle plate is attached to the inner wall of the inner mesh cylinder, and the outer wall of the baffle plate is in sliding fit with the inner wall of the inner mesh cylinder; the axial two ends of the baffle plate are correspondingly attached to the end covers one by one, and the axial two ends of the baffle plate are correspondingly matched with the end covers in a sliding manner one by one;
the baffle is furnished with: the rotating shaft drives the baffle to rotate around the axis of the inner cylinder; the rotating shaft and the inner mesh cylinder share the same axis, the baffle is positioned between the rotating shaft and the inner mesh cylinder, and the inner wall of the baffle is connected with the rotating shaft through a connecting rod;
one end of the rotating shaft is provided with a motor for driving the rotating shaft to rotate; the motor is positioned in the inner ring of one end cover, the motor is connected with the end cover through a support rod, and the support rod is positioned outside the baffle;
the cylindrical air purification filter paper comprises the following components which are sequentially stacked from inside to outside or from outside to inside: the device comprises a first protective layer, an ozone decomposition layer, a formaldehyde oxidation layer, a filter layer and a second protective layer;
the first protective layer, the ozone decomposition layer, the formaldehyde oxidation layer, the filtering layer and the second protective layer which are sequentially stacked are compounded together through an adhesive process;
the first protective layer is made of flame-retardant sponge;
the ozone decomposition layer is made of activated carbon loaded with a room-temperature ozone decomposition catalyst;
the formaldehyde oxidation layer is made of activated carbon loaded with a room-temperature formaldehyde oxidation catalyst;
the filter layer is a polymer porous membrane, the aperture of the polymer porous membrane is 0.2-0.5 mu m, and the porosity is more than or equal to 95%;
the second protective layer is made of flame-retardant non-woven fabric.
2. The air purification cartridge of claim 1, wherein the pair of end caps are each provided with a circular slot, the circular slots being coaxial with the end cap; the axial two ends of the inner net cylinder, the cylindrical composite air purification filter paper and the outer net cylinder are respectively inserted into the circular slots of the pair of end covers.
3. The air purification cartridge as recited in claim 1, wherein the inner mesh cartridge, the cylindrical composite air purification filter paper, and the outer mesh cartridge are removably connected to the pair of end caps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215944.5A CN109224841B (en) | 2018-10-18 | 2018-10-18 | Composite air purification filter paper and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215944.5A CN109224841B (en) | 2018-10-18 | 2018-10-18 | Composite air purification filter paper and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109224841A CN109224841A (en) | 2019-01-18 |
| CN109224841B true CN109224841B (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811215944.5A Expired - Fee Related CN109224841B (en) | 2018-10-18 | 2018-10-18 | Composite air purification filter paper and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109224841B (en) |
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| JPS5916521A (en) * | 1982-07-21 | 1984-01-27 | Jii Ii De Eng Kk | Construction of vortex centrifugal type rotary filtering and dust catching device |
| CN2471394Y (en) * | 2001-03-30 | 2002-01-16 | 俞阿明 | Brush filter |
| CN2673480Y (en) * | 2003-11-26 | 2005-01-26 | 葛振贵 | Stainless steel filtering barrel filter |
| JP2005523812A (en) * | 2002-04-29 | 2005-08-11 | ジョナサン シェウィッツ トラスト | Support structure for holding filter media |
| CN201049276Y (en) * | 2007-06-01 | 2008-04-23 | 席玉林 | Centrifugal filtering composite dust-removing device |
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| EP2173459A1 (en) * | 2007-07-20 | 2010-04-14 | Donaldson Company, Inc. | Air cleaner arrangements and cartridges |
| CN104492190A (en) * | 2014-12-03 | 2015-04-08 | 成都博世德能源科技股份有限公司 | Efficient cylinder type air filter for gas turbine |
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| CN205127562U (en) * | 2015-10-23 | 2016-04-06 | 小米科技有限责任公司 | Air purifier and filter element thereof |
| CN205295805U (en) * | 2015-12-03 | 2016-06-08 | 北京亚都环保科技有限公司 | Compound air purification filter paper and use its filter core |
| CN205392015U (en) * | 2016-03-01 | 2016-07-27 | 北京小米移动软件有限公司 | Air purifier and filter element thereof |
| CN106334373A (en) * | 2016-09-29 | 2017-01-18 | 芜湖美智空调设备有限公司 | Composite air purifying filter paper material and filter element using same |
| CN107096320A (en) * | 2017-03-29 | 2017-08-29 | 浙江工业大学 | A kind of air purification method and air purifying filter core |
| CN107469614A (en) * | 2017-07-04 | 2017-12-15 | 中国科学院城市环境研究所 | A kind of multifunctional air purifying screen pack |
| CN207085555U (en) * | 2017-07-25 | 2018-03-13 | 天津贝罗尼生物科技有限公司 | A kind of washable filter element structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1754525B1 (en) * | 2005-08-16 | 2011-01-19 | Donaldson Company, Inc. | Air cleaner having anti-rotational arrangement and method |
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2018
- 2018-10-18 CN CN201811215944.5A patent/CN109224841B/en not_active Expired - Fee Related
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916521A (en) * | 1982-07-21 | 1984-01-27 | Jii Ii De Eng Kk | Construction of vortex centrifugal type rotary filtering and dust catching device |
| CN2471394Y (en) * | 2001-03-30 | 2002-01-16 | 俞阿明 | Brush filter |
| JP2005523812A (en) * | 2002-04-29 | 2005-08-11 | ジョナサン シェウィッツ トラスト | Support structure for holding filter media |
| CN2673480Y (en) * | 2003-11-26 | 2005-01-26 | 葛振贵 | Stainless steel filtering barrel filter |
| CN201049276Y (en) * | 2007-06-01 | 2008-04-23 | 席玉林 | Centrifugal filtering composite dust-removing device |
| EP2173459A1 (en) * | 2007-07-20 | 2010-04-14 | Donaldson Company, Inc. | Air cleaner arrangements and cartridges |
| CN101433788A (en) * | 2008-11-28 | 2009-05-20 | 东莞市宇洁新材料有限公司 | Air purifying filter |
| CN104492190A (en) * | 2014-12-03 | 2015-04-08 | 成都博世德能源科技股份有限公司 | Efficient cylinder type air filter for gas turbine |
| CN204816222U (en) * | 2015-06-04 | 2015-12-02 | 东莞市宏源净化设备有限公司 | Air purification filter screen |
| CN205127562U (en) * | 2015-10-23 | 2016-04-06 | 小米科技有限责任公司 | Air purifier and filter element thereof |
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| CN205392015U (en) * | 2016-03-01 | 2016-07-27 | 北京小米移动软件有限公司 | Air purifier and filter element thereof |
| CN106334373A (en) * | 2016-09-29 | 2017-01-18 | 芜湖美智空调设备有限公司 | Composite air purifying filter paper material and filter element using same |
| CN107096320A (en) * | 2017-03-29 | 2017-08-29 | 浙江工业大学 | A kind of air purification method and air purifying filter core |
| CN107469614A (en) * | 2017-07-04 | 2017-12-15 | 中国科学院城市环境研究所 | A kind of multifunctional air purifying screen pack |
| CN207085555U (en) * | 2017-07-25 | 2018-03-13 | 天津贝罗尼生物科技有限公司 | A kind of washable filter element structure |
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| Publication number | Publication date |
|---|---|
| CN109224841A (en) | 2019-01-18 |
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