CN109248786B - Atmosphere suspended particle collection device - Google Patents

Atmosphere suspended particle collection device Download PDF

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Publication number
CN109248786B
CN109248786B CN201811092386.8A CN201811092386A CN109248786B CN 109248786 B CN109248786 B CN 109248786B CN 201811092386 A CN201811092386 A CN 201811092386A CN 109248786 B CN109248786 B CN 109248786B
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China
Prior art keywords
plate
suspended particle
cavity
collecting
layer
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CN201811092386.8A
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CN109248786A (en
Inventor
周博
蔡霈
陈永平
姚峰
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Suzhou University of Science and Technology
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Suzhou University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02Plant or installations having external electricity supply
    • B03C3/04Plant or installations having external electricity supply dry type
    • B03C3/08Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/66Applications of electricity supply techniques
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/74Cleaning the electrodes
    • B03C3/743Cleaning the electrodes by using friction, e.g. by brushes or sliding elements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Abstract

The invention discloses an atmospheric suspended particle collecting device which comprises a box body, an electrostatic filter and an ash bucket. The top end of the box body is provided with an opening, one side plate is a solar panel, and the other three side plates are solar heat collecting plates; the inner cavity of the box body is divided into a suspended particle collecting cavity and a cleaning flow guide cavity by the inner wall partition board; the bottom parts of the front side plate and the rear side plate are respectively provided with an outer wall shutter; the back side plate is provided with an electrostatic filter, and each dust collecting electrode can self-clean; an inner wall shutter is arranged at the bottom of the inner cavity clapboard; a filter screen is arranged on the inner wall shutter; the ash bucket is placed on the bottom plate at the bottom of the suspended particle collecting cavity. The invention provides electric energy for the electrostatic filter by utilizing the solar photovoltaic power generation technology; meanwhile, the phase-change energy storage material is used for storing energy, so that the running time of the solar heat collection module is not limited by time factors at all, and air is continuously driven to flow upwards, thereby achieving the purpose of treating outdoor air pollution.

Description

Atmosphere suspended particle collection device
Technical Field
The invention relates to an atmosphere treatment device, in particular to an atmosphere suspended particle collecting device.
Background
With the development of industry, more and more waste gas is generated in the industrial production process. A large amount of exhaust gas is discharged into the air, resulting in more and more serious air pollution. After being inhaled by people, a large amount of dust particles in the air can enter bronchus and even lung through a respiratory system, and diseases such as respiratory diseases, cerebrovascular diseases, nasal inflammation and the like can be caused. Now, people are aware of the harmfulness of atmospheric suspended particles, and usually install an air purifier indoors to purify air. But according to related researches, people are exposed to the outside for a long time, and the collection of suspended particulate matters in outdoor air is extremely urgent.
In addition, the economic and social development of China already enters a large energy consumption stage, and the demand on energy is increasingly tense. The energy structure of China is mainly based on traditional energy such as coal, and the energy structure is not common to clean energy such as solar energy, wind energy and the like. Conventional air filter operation requires a large amount of electrical power to be consumed. Solar energy has application prospect as the most abundant energy in the world, and the electric energy generated by the solar energy can be considered to be supplied to the air filter for working.
In many cases, the supply and demand of energy is limited by time. And the phase-change energy storage material is a substance which changes the state of the substance along with the change of temperature and can provide latent heat. Taking solid-liquid phase change as an example, when the material is heated to a melting temperature, the phase change material generates phase change from a solid state to a liquid state, and the phase change material absorbs and stores a large amount of latent heat; when the phase change material is cooled to the solidification temperature, a phase change from a liquid state to a solid state is generated, and a large amount of latent heat is released from the phase change material. At present, in order to reasonably utilize energy, phase change energy storage materials are increasingly applied to various energy storage occasions.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an atmospheric suspended particle collecting device, which utilizes the solar photovoltaic power generation technology to provide electric energy for an electrostatic filter; meanwhile, the phase-change energy storage material is used for storing energy, so that the running time of the solar heat collection module is not limited by time factors at all, and air is continuously driven to flow upwards, thereby achieving the purpose of treating outdoor air pollution.
In order to solve the technical problems, the invention adopts the technical scheme that:
an atmosphere suspended particle collecting device comprises a box body, an electrostatic filter and an ash bucket.
The top end of the box body is provided with an opening, and the components of the box body comprise a bottom plate and four side plates which are enclosed around the bottom plate; one side plate is a solar cell panel, and the other three side plates are solar heat collecting plates; assuming that one solar heat collecting plate corresponding to the solar cell panel is a left side plate, the other two solar heat collecting plates are respectively a front side plate and a rear side plate.
The vertical interior wall baffle that sets up in the box body, this interior wall baffle will divide into the box body inner chamber suspended particles and collect the chamber and clean the water conservancy diversion chamber, wherein, clean the water conservancy diversion chamber and be located between interior wall baffle and the left side board.
The bottoms of the front side plate and the rear side plate are respectively provided with an outer wall shutter communicated with the suspended particle collecting cavity; be located to be provided with electrostatic filter on the posterior lateral plate at suspended particle collection chamber top, electrostatic filter is including the collection dirt utmost point and the corona utmost point of staggered arrangement, all installs the brush that removes dust on every collection dirt utmost point, and this brush that removes dust can clean the collection dirt utmost point surface automatically.
The inner wall surface of the front side plate positioned above the outer wall shutter is provided with a plurality of fins.
The bottom of the inner cavity partition board is provided with an inner wall shutter which can communicate the suspended particle collecting cavity with the bottom of the cleaning flow guide cavity; the inner wall shutter is provided with a filter screen.
The ash bucket is placed on the bottom plate at the bottom of the suspended particle collecting cavity.
The solar cell panel provides electric energy for the dust collecting electrode, the corona electrode and the dust removing brush.
Each solar heat collecting plate is provided with a vacuum heat collecting layer and a heat storage layer from outside to inside, and phase-change materials are filled in the heat storage layers.
The inner wall surface of each solar heat collecting plate is coated with a nano self-cleaning material.
The electrostatic filter is provided with at least two layers, wherein the dust collecting electrode positioned on the upper layer and the corona electrode positioned on the adjacent lower layer are positioned on the same vertical straight line.
The electrostatic filter is three layers which are respectively an upper layer, a middle layer and a lower layer from top to bottom, wherein the dust collecting electrode on the upper layer, the corona electrode on the middle layer and the dust collecting electrode on the lower layer are positioned on the same vertical straight line.
The dust collecting pole has a self-cleaning function, and the self-cleaning method comprises the following steps.
Step 1, stopping collecting atmospheric suspended particles: and closing the outer wall shutters on the front side plate and the rear side plate, and stopping the collection of the atmospheric suspended particles.
Step 2, air diversion of the suspended particle collecting cavity: and opening the inner wall shutter, guiding the air in the suspended particle collecting cavity by the inner wall shutter, and enabling the air in the suspended particle collecting cavity to flow from top to bottom, pass through the inner wall shutter and flow from bottom to top in the cleaning and guiding cavity.
Step 3, cleaning a dust collecting electrode: the dust removing brush is started to automatically clean; the falling dust is swept from the surface of the dust collecting electrode, flows from top to bottom along with the air in the suspended particle collecting cavity, and falls into the dust hopper.
And 4, recovering atmospheric suspended particle collection: after cleaning, closing the inner wall shutters, and opening the outer wall shutters on the front side plate and the rear side plate; at the moment, after being heated, the atmosphere positioned on the outer side of the solar heat collecting plate enters the suspended particle collecting cavity through the outer wall shutter and flows to the electrostatic filter from bottom to top, and the fins disturb the atmosphere in the flowing process; the electrostatic filter automatically collects suspended particles in the atmosphere; the cleaned air is exhausted from the top of the suspended particle collecting cavity.
The solar charging and discharging device comprises a controller, a storage battery pack, an inverter, a transformer and a rectifier which are sequentially and electrically connected; when the solar energy battery panel is irradiated by sunlight on a sunny day, the direct current is converted into alternating current through the controller, the storage battery pack and the inverter, the alternating current is converted into high-voltage alternating current through the transformer, and the high-voltage direct current is converted into high-voltage direct current through the rectifier and is supplied to the electrostatic filter for use; when in cloudy days or at night, the electrostatic filter is supplied with electric energy by the storage battery.
The solar charging and discharging device is arranged in a buried manner.
The invention has the following beneficial effects:
1. the solar photovoltaic power generation system is completely relied to provide electric energy, and solar energy is taken as a pollution-free and environment-friendly energy source to be fully utilized, so that the energy-saving effect is achieved.
2. Due to the use of the phase-change material, the solar heat collecting plate is not limited by time conditions.
3. The electrostatic filter has a self-cleaning function, and the cleaning process has no pollution to the atmosphere, and no additional fan and other equipment are needed for air diversion.
Drawings
Fig. 1 shows a schematic diagram of an explosive structure of an atmospheric suspended particle collecting device according to the present invention.
Fig. 2 shows a schematic view of the air flow direction of the electrostatic filter during self-cleaning.
Fig. 3 shows a structural view of the electrostatic filter.
Fig. 4 shows a layout position diagram of the sweeping brush.
FIG. 5 shows a working schematic diagram of a solar photovoltaic power generation module
Fig. 6 shows a structure view of the inner wall surface of the front side plate.
Among them are: 1. a front side plate; 2. an outer wall louver; 3. an electrostatic filter; 4. a solar panel; 5. an ash hopper; 6. a controller; 7. a battery pack; 8. an inverter; 9. a transformer; 10. a rectifier; 11. a dust collecting electrode; 12. a corona electrode; 13. a dust removal brush; 14. a vacuum heat collecting layer; 15. a heat storage layer; 16. ribs; 17. an inner wall partition; 18. an interior wall louver; 19. cleaning the diversion cavity; 20. a rear side plate; 21. and a left side plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in fig. 1 and 2, the atmospheric suspended particle collecting device comprises a box body, an electrostatic filter 3, an ash bucket 5 and a solar charging and discharging device.
The top end of the box body is provided with an opening, and the components of the box body comprise a bottom plate and four side plates surrounding the bottom plate.
Taking the placement position in fig. 1 as an example, but other placement manners are also possible, and the four side plates are respectively a front side plate, a rear side plate, a left side plate and a rear side plate according to the orientation.
Wherein the right side board is solar cell panel, and the surface of the right side board is also embedded with a plurality of solar cell panels.
The solar cell panel and the solar charging and discharging device jointly form a solar photovoltaic power generation module.
The solar charging and discharging device is preferably arranged in a buried manner, and does not occupy the land area. Solar photovoltaic power generation module provides the electric energy for dust collecting electrode, corona electrode and dust removing brush.
As shown in fig. 5, the solar charging and discharging device includes a controller 6, a battery pack 7, an inverter 8, a transformer 9 and a rectifier 10 electrically connected in sequence. When the solar energy battery panel is irradiated by sunlight on a sunny day, the direct current is converted into alternating current through the controller, the storage battery pack and the inverter, the alternating current is converted into high-voltage alternating current through the transformer, and the high-voltage direct current is converted into high-voltage direct current through the rectifier and is supplied to the electrostatic filter for use; when in cloudy days or at night, the electrostatic filter is supplied with electric energy by the storage battery.
The other three side plates are all solar heat collecting plates; assuming that one solar heat collecting plate corresponding to the solar cell panel is a left side plate, the other two solar heat collecting plates are respectively a front side plate and a rear side plate.
As shown in fig. 1, each solar heat collecting plate is provided with a vacuum heat collecting layer 14 and a heat storage layer 15 from outside to inside, and phase-change materials are filled in the heat storage layers, so that the collecting device can be solidified and release heat when the phase-change materials are lower than the phase-change temperature of the collecting device at night or in continuous cloudy days, the air heating effect is also achieved, the solar heat collecting plates can continuously work, and the solar heat collecting plates are not limited by time factors.
The inner wall surface of each solar heat collecting plate is coated with a nano self-cleaning material, so that dust accumulation can be prevented, and thermal resistance can be reduced.
The solar heat collecting plate has no moving parts, is not easy to damage, can be used for a long time and has low maintenance cost. After the solar heat collecting plate collects heat, the phase change material is directly heated, and the heat loss is low.
An inner wall partition board 17 is vertically arranged in the box body, the inner cavity of the box body is divided into a suspended particle collecting cavity and a cleaning flow guide cavity 19 by the inner wall partition board, and the cleaning flow guide cavity is positioned between the inner wall partition board and the left side plate. The volume of the sweeping diversion chamber is less than the volume of the suspended particle collection chamber, preferably 1/5 or less of the volume of the suspended particle collection chamber.
The bottoms of the front side plate and the rear side plate are respectively provided with an outer wall shutter 2 communicated with the suspended particle collecting cavity; and an electrostatic filter 3 is arranged on the rear side plate at the top of the suspended particle collecting cavity.
As shown in fig. 3, the electrostatic filter includes dust collecting electrodes 11 and corona electrodes 12 arranged alternately.
As shown in fig. 4, each dust collecting electrode is provided with a dust removing brush 13 which can automatically clean the surface of the dust collecting electrode.
The electrostatic filter is provided with at least two layers, preferably three layers. Wherein, the dust collecting electrode on the upper layer and the corona electrode on the adjacent lower layer are positioned on the same vertical straight line. When the structure is three layers, the structure is an upper layer, a middle layer and a lower layer from top to bottom, wherein the dust collecting electrode on the upper layer, the corona electrode on the middle layer and the dust collecting electrode on the lower layer are positioned on the same vertical straight line.
As shown in FIG. 6, a plurality of fins 16 are preferably arranged on the inner wall surface of the front side plate above the outer wall louver in a staggered manner, so that the effect of disturbing air is achieved, and the heat exchange coefficient is improved.
The bottom of the inner cavity partition board is provided with an inner wall shutter 18 which can communicate the suspended particle collecting cavity with the bottom of the cleaning diversion cavity; the inner wall shutter is provided with a filter screen.
The ash bucket is arranged on the bottom plate at the bottom of the suspended particle collecting cavity and is used for collecting the particulate matters on the dust collecting electrode.
The dust collecting pole has a self-cleaning function, and the self-cleaning method comprises the following steps.
Step 1, stopping collecting atmospheric suspended particles: the outer wall shutter on the front side plate and the rear side plate is closed, and the collection of the atmospheric suspended particles is stopped, so that the pollution to the atmosphere is prevented in the cleaning process.
Step 2, air diversion of the suspended particle collecting cavity: and opening the inner wall shutter, wherein the inner wall shutter guides the air in the suspended particle collecting cavity, and the air in the suspended particle collecting cavity flows from top to bottom (namely, flows reversely with the suspended particle collecting process) and flows from bottom to top in the sweeping guide cavity after passing through the inner wall shutter.
The flow guide principle is as follows: the other three clapboards except the inner cavity clapboard of the cleaning flow guide cavity are solar heat collecting boards, and the temperature of the bottom of the cleaning flow guide cavity is higher than that of the bottom of the suspended particle collecting cavity, so that the air entering the cleaning flow guide cavity flows upwards.
Step 3, cleaning a dust collecting electrode: the dust removing brush is started to automatically clean; the dust that drops is cleaned from the collection dirt utmost point surface, flows from last to bottom along with the air in the suspended particles collection chamber to drop to the ash bucket in, avoided collecting the atmospheric suspended particles in-process contaminated air.
And 4, recovering atmospheric suspended particle collection: after cleaning, closing the inner wall shutters, and opening the outer wall shutters on the front side plate and the rear side plate; at the moment, after being heated, the atmosphere positioned on the outer side of the solar heat collecting plate enters the suspended particle collecting cavity through the outer wall shutter and flows to the electrostatic filter from bottom to top, and the fins disturb the atmosphere in the flowing process; the electrostatic filter automatically collects suspended particles in the atmosphere; the cleaned air is exhausted from the top of the suspended particle collecting cavity.
The electrostatic filter has a self-cleaning function, and the time interval for cleaning or replacing is longer, so that the use cost can be greatly reduced. And after air flows into the device through the outer wall or the inner wall shutter and is heated, natural convection does not need to additionally arrange a fan for drainage, and the energy consumption of the electrostatic filter can be effectively reduced.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.

Claims (7)

1. An atmosphere suspended particle collection device which characterized in that: comprises a box body, an electrostatic filter and an ash hopper;
the top end of the box body is provided with an opening, and the components of the box body comprise a bottom plate and four side plates which are enclosed around the bottom plate; one side plate is a solar cell panel and is a right side plate; the other three side plates are all solar heat collecting plates; assuming that one solar heat collecting plate corresponding to the solar cell panel is a left side plate, the other two solar heat collecting plates are respectively a front side plate and a rear side plate;
an inner wall partition board is vertically arranged in the box body, and divides the inner cavity of the box body into a suspended particle collecting cavity and a cleaning flow guide cavity, wherein the cleaning flow guide cavity is positioned between the inner wall partition board and the left side plate;
the bottoms of the front side plate and the rear side plate are respectively provided with an outer wall shutter communicated with the suspended particle collecting cavity; the electrostatic filter is arranged on the rear side plate positioned at the top of the suspended particle collecting cavity and comprises dust collecting electrodes and corona electrodes which are arranged in a staggered mode, and each dust collecting electrode is provided with a dust removing brush which can automatically clean the surfaces of the dust collecting electrodes;
a plurality of fins are arranged on the inner wall surface of the front side plate above the outer wall shutter;
the bottom of the inner wall partition board is provided with an inner wall shutter which can communicate the suspended particle collecting cavity with the bottom of the cleaning diversion cavity; a filter screen is arranged on the inner wall shutter;
the ash bucket is arranged on the bottom plate at the bottom of the suspended particle collecting cavity;
the solar cell panel provides electric energy for the dust collecting electrode, the corona electrode and the dust removing brush.
2. The atmospheric suspended particle collection device of claim 1, wherein: each solar heat collecting plate is provided with a vacuum heat collecting layer and a heat storage layer from outside to inside, and phase-change materials are filled in the heat storage layers.
3. The atmospheric suspended particle collecting device according to claim 1 or 2, characterized in that: the inner wall surface of each solar heat collecting plate is coated with a nano self-cleaning material.
4. The atmospheric suspended particle collection device of claim 3, wherein: the electrostatic filter is provided with at least two layers, wherein the dust collecting electrode positioned on the upper layer and the corona electrode positioned on the adjacent lower layer are positioned on the same vertical straight line.
5. The atmospheric suspended particle collection device of claim 4, wherein: the electrostatic filter is three layers which are respectively an upper layer, a middle layer and a lower layer from top to bottom, wherein the dust collecting electrode on the upper layer, the corona electrode on the middle layer and the dust collecting electrode on the lower layer are positioned on the same vertical straight line.
6. The atmospheric suspended particle collection device of claim 5, wherein: the solar charging and discharging device comprises a controller, a storage battery pack, an inverter, a transformer and a rectifier which are sequentially and electrically connected; when the solar energy battery panel is irradiated by sunlight on a sunny day, the direct current is converted into alternating current through the controller, the storage battery pack and the inverter, the alternating current is converted into high-voltage alternating current through the transformer, and the high-voltage direct current is converted into high-voltage direct current through the rectifier and is supplied to the electrostatic filter for use; when in cloudy days or at night, the electrostatic filter is supplied with electric energy by the storage battery.
7. The atmospheric suspended particle collection device of claim 6, wherein: the solar charging and discharging device is arranged in a buried manner.
CN201811092386.8A 2018-09-19 2018-09-19 Atmosphere suspended particle collection device Active CN109248786B (en)

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Citations (3)

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Publication number Priority date Publication date Assignee Title
CN201832715U (en) * 2010-10-19 2011-05-18 苏州贝昂科技有限公司 Solar-driven electrostatic air cleaner
CN104456766A (en) * 2014-11-14 2015-03-25 娲石水泥集团武汉万世科技有限公司 Multi-mode intelligent environment-friendly air conditioning complete-set product
CN207187361U (en) * 2017-09-22 2018-04-06 苏州科技大学 Self-cleaning, air cleaning device

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Publication number Priority date Publication date Assignee Title
JPH02233157A (en) * 1989-03-08 1990-09-14 Canon Inc Air purifier equipped with solar cell
CN202893511U (en) * 2012-11-20 2013-04-24 上海电机学院 Solar electrostatic dust collector
KR101950082B1 (en) * 2014-06-10 2019-02-19 더 프록터 앤드 갬블 캄파니 Air filter bag
CN203949286U (en) * 2014-06-10 2014-11-19 张兆鹏 A kind of small home air purifier
CN204685293U (en) * 2015-05-29 2015-10-07 云南师范大学 A kind of solar energy static dedusting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201832715U (en) * 2010-10-19 2011-05-18 苏州贝昂科技有限公司 Solar-driven electrostatic air cleaner
CN104456766A (en) * 2014-11-14 2015-03-25 娲石水泥集团武汉万世科技有限公司 Multi-mode intelligent environment-friendly air conditioning complete-set product
CN207187361U (en) * 2017-09-22 2018-04-06 苏州科技大学 Self-cleaning, air cleaning device

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