CN206295752U - Urban air filter station - Google Patents
Urban air filter station Download PDFInfo
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- CN206295752U CN206295752U CN201621360230.XU CN201621360230U CN206295752U CN 206295752 U CN206295752 U CN 206295752U CN 201621360230 U CN201621360230 U CN 201621360230U CN 206295752 U CN206295752 U CN 206295752U
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- 238000001914 filtration Methods 0.000 claims abstract description 39
- 238000009434 installation Methods 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 7
- 240000002853 Nelumbo nucifera Species 0.000 claims description 35
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 35
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 35
- 239000000428 dust Substances 0.000 claims description 31
- 239000013618 particulate matter Substances 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
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- 239000007789 gas Substances 0.000 description 3
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- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 208000014085 Chronic respiratory disease Diseases 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
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- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 231100000614 poison Toxicity 0.000 description 1
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Abstract
The utility model provides a kind of urban air filter station, including：Suction apparatus, for sucking contaminated air by suction inlet；Pre-filtrating equipment, for the bulky grain thing of PM10 and the above in the contaminated air of filtration treatment suction；Filter, the contaminated air for filtering and processing suction；One or more exhaust outlets, for the air after filtering to be dispersed into air；The contaminated air of suction, respectively through the treatment of pre-filtrating equipment and filter after, be dispersed into air by exhaust outlet.The urban air filter station that the utility model is provided, it is a kind of installation of rationally layouting by city, purifying city air can just be reached, the large-scale air processing equipment of PM indexes is reduced, it is ensured that the living environment of the mankind, effect well is played to build environmental protection city.
Description
Technical field
The utility model is related to technical field of air purification, more particularly, to a kind of urban air filter station.
Background technology
It is big that current China is in the epoch that economy is developed rapidly, industrial waste gas, vehicle exhaust, airborne dust and building dust etc.
Gas pollution is not endangering the respiratory health of city dweller all the time.
It is known that the atmosphere pollution caused due to air middle and high concentration particulate matter or particulate, i.e., the solid suspended in air
Or liquid particles mixture.The particle or particulate have the characteristic diameter for being equal to or less than 10 microns, commonly referred to as PM10.
It is defined as PM2.5 with the particulate equal to or less than 2.5 micrometer features diameter.
The emitting source of PM10 or PM2.5 is natural source, for example, soil corrosion, pollen or conidia powder are propagated, or the mankind work
It is dynamic.Particularly in urban area, such material is mainly by internal combustion engine, heating system, industrial emissions and because traffic causes
Road surfaces abrasion produce.
PM10 and most important PM2.5 are abnormally dangerous to the mankind, and they can cause allergy, inflammation or chronic respiratory disease
Disease.PM10 can also cause the change of atmospheric physics performance, such as reflection and refraction of visibility, light.It is influenced whether up to the earth
The radiativity and type of light, easily form mist or cloud, or even acid rain.
The diameter of PM2.5 is less than the 1/20 of the hairline thickness of people.Although PM2.5 is content in earth atmosphere composition
Little component, but it has important influence to air quality and visibility etc., compared with thicker Atmospheric particulates, PM2.5
Particle diameter is small, and residence time rich in substantial amounts of poisonous and harmful substances and in an atmosphere is long, fed distance is remote thus strong to human body
The influence of health and atmosphere quality is bigger.
Occur at present various for air-treatment and the method and apparatus of purification, mainly air purifier, can effectively change
The dust of air, pollen and other small particles in kind use environment.But current air purifier be suitable for it is indoor,
The small size air cleaner that the small-sized place such as workshop uses, it is impossible to suitable for city inner air-cleaning.
Utility model content
The purpose of this utility model is to provide a kind of urban air filter station, with eliminating open urban areas air
Particulate matter and other pollutants.
A kind of urban air filter station that the utility model is provided, including：
Suction apparatus, for sucking contaminated air by suction inlet；
Pre-filtrating equipment, for the bulky grain thing of PM10 and the above in the contaminated air of filtration treatment suction；
Filter, the contaminated air for filtering and processing suction；
One or more exhaust outlets, for the air after filtering to be dispersed into air；
The contaminated air of suction, respectively through the treatment of pre-filtrating equipment and filter after, be dispersed into by exhaust outlet
In air.
Preferably, the pre-filtrating equipment, including one or more groups of charged pole piece groups, for adsorbing PM10 in contaminated air
And the bulky grain thing of the above；
And the dust collecting installation below charged pole piece group is arranged on, the dust collecting installation is used to collect charge electric pole
The PM10 of piece group absorption and the bulky grain thing of the above.
Preferably, the charged pole piece group includes lotus electrode film group and bear electrode slice group；
The lotus electrode film group, including multiple is centrally located at same level and vertical spaced lotus positive electrode
Piece；
The bear electrode slice group, including multiple is centrally located at same level and vertical spaced bear electrode
Piece；
The lotus electrode film group is arranged above or below bear electrode slice group, lotus electrode film group and bear electrode
It is provided between piece group for the gap by contaminated air；
When the lotus electrode film group is arranged at the top of bear electrode slice group, the lower end of lotus electrode film group is less than lotus
The upper end of negative electrode plate group；
When the lotus electrode film group is arranged at the lower section of bear electrode slice group, bear electrode slice group lower end is less than lotus just
The upper end of electrode slice group.
Preferably, the lotus electrode film and bear electrode slice are arc-shaped electrode piece.
Preferably, the dust collecting installation includes dirt collecting receptacle and holds for opening or closing the dust and collecting
The power valve plate of device collection port；
When charged pole piece group is powered, power valve plate closes the dirt collecting receptacle collection port；
When charged pole piece group band is not charged, power valve plate opens the dirt collecting receptacle collection port.
Preferably, the utility model also include for commanding or control pre-filtrating equipment, filter and suction apparatus
The controller of work.
Preferably, the utility model also includes detection means, for detecting the power of suction apparatus and/or treating contaminated air
Stream pressure and/or flow velocity parameter, and the data transfer that will be detected is to controller, when the data for detecting are less than setting
During value, controller sends the signal for needing to change and/or safeguard pre-filtrating equipment and/or filter.
Preferably, the filter includes what is set gradually：
Low efficient filter, the particulate matter for filtering PM5 and the above；
Medium effeciency filter, the particulate matter for filtering PM2.5 and the above；
Electrostatic filter, the particulate matter for filtering PM1 and the above.
Preferably, dust collecting installation also includes dust collection funnel, and lower end and the dust of the dust collection funnel are received
Collect the collection port connection of container.
Preferably, described suction apparatus is one or more blower fans, and blower fan is arranged on suction inlet or exhaust outlet inner side.
Urban air filter station and the air filtering method based on this that the utility model is provided are one kind by city
Rationally layout installations, can just reach purifying city air, the large-scale air processing equipment of reduction PM indexes, it is ensured that the mankind's
Living environment, effect well is played to build environmental protection city.
Pre-filtrating equipment in the utility model, can filter out the bulky grain thing of the PM10 in contaminated air and the above, subtract
The small pressure of filter, need not frequently carry out maintenance work in filter process, subtract and descended operation of the present utility model
Cost, improves filter efficiency of the present utility model.
The setting of power valve board structure and principle in the utility model so that charged pole piece group carries out filtering absorption work
When, collecting dust in dirt collecting receptacle will not fly out dirt collecting receptacle in the presence of electric charge and air draught, make
Into the secondary pollution of filtered air.When charged pole piece group does not carry out filtering absorption work, power valve plate is opened, and is adsorbed in lotus
Dust in electrode slice group under gravity, is fallen into dirt collecting receptacle collection port, realizes the certainly clear of pre-filtrating equipment
Wash function.
Brief description of the drawings
In order to illustrate more clearly of the utility model specific embodiment or technical scheme of the prior art, below will be right
The accompanying drawing to be used needed for specific embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some implementation methods of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
The city space filter station structural representation that Fig. 1 is provided for the utility model；
Fig. 2 is the structural representation of charged pole piece group in the utility model；
Fig. 3 is the structural representation of lotus electrode film and bear electrode slice in the utility model；
The flow chart of the air filtering method based on city space filter station that Fig. 4 is provided for the utility model.
Reference：
1- housings；2- suction inlets；3- exhaust outlets；
4- pre-filtrating equipments；5- filters；6- suction apparatus；
11- separates；The charged pole piece groups of 41-；42- dust collecting installations；
421- dirt collecting receptacles；422- power valve plates；423- dust collection funnels；
51- low efficient filters；52- medium effeciency filters；53- electrostatic filters.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
It is term " " center ", " on ", D score, "left", "right", " perpendicular, it is necessary to explanation in description of the present utility model
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outward " are, based on orientation shown in the drawings or position relationship, to be only
Described with simplified for the ease of description the utility model, must had rather than the device or element for indicating or implying meaning specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
Can be two connections of element internal.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
The city space filter station structural representation that Fig. 1 is provided for the utility model；Fig. 2 is charge electric pole in the utility model
The structural representation of piece group；Fig. 3 is the structural representation of lotus electrode film and bear electrode slice in the utility model；Fig. 4 is this
The flow chart of the air filtering method based on city space filter station that utility model is provided.
As Figure 1-3, a kind of urban air filter station that the utility model is provided, including：
Suction apparatus 6, for sucking contaminated air by suction inlet 2；
Pre-filtrating equipment 4, for the bulky grain thing of PM10 and the above in the contaminated air of filtration treatment suction；
Filter 5, the contaminated air for filtering and processing suction；
One or more exhaust outlets 3, for the air after filtering to be dispersed into air；
The contaminated air of suction, respectively through the treatment of pre-filtrating equipment 4 and filter 5 after, distributed by exhaust outlet 3
To in air.
Urban air filter station and the air filtering method based on this that the utility model is provided are one kind by city
Rationally layout installations, can just reach purifying city air, the large-scale air processing equipment of reduction PM indexes, it is ensured that the mankind's
Living environment, effect well is played to build environmental protection city.
Pre-filtrating equipment 4 in the utility model, can filter out the bulky grain thing of the PM10 in contaminated air and the above, subtract
The small pressure of filter 5, need not frequently carry out maintenance work in filter process, subtract and descended operation of the present utility model
Cost, improves filter efficiency of the present utility model.
The city filter station that the utility model is provided also includes housing 1, at least provided with a cut-off inside the housing 1
11, it is adaptable to which inner space is roughly divided into a pre-filtering chamber and at least one filter chamber, the suction inlet 2 is arranged on pre- mistake
Filter chamber top.Cut-off 11 has one or more through holes in the present embodiment, for providing the inside pre-filtering chamber of housing 1 and filter chamber
Between connection.
The pre-filtrating equipment 4, including one or more groups of charged pole piece groups 41, for adsorb in contaminated air PM10 and with
On bulky grain thing；
And the dust collecting installation 42 below charged pole piece group 41 is arranged on, the dust collecting installation 42 is used to collect
The PM10 of the charged absorption of pole piece group 41 and the bulky grain thing of the above.
As shown in Figures 2 and 3, the charged pole piece group 41 includes lotus electrode film group and bear electrode slice group；
The lotus electrode film group, including multiple is centrally located at same level and vertical spaced lotus positive electrode
Piece；
The bear electrode slice group, including multiple is centrally located at same level and vertical spaced bear electrode
Piece；
The lotus electrode film group is arranged above or below bear electrode slice group, lotus electrode film group and bear electrode
It is provided between piece group for the gap by contaminated air；
When the lotus electrode film group is arranged at the top of bear electrode slice group, the lower end of lotus electrode film group is less than lotus
The upper end of negative electrode plate group；
When the lotus electrode film group is arranged at the lower section of bear electrode slice group, bear electrode slice group lower end is less than lotus just
The upper end of electrode slice group.
The lotus electrode film and bear electrode slice are arc-shaped electrode piece.
The dust collecting installation 42 includes dirt collecting receptacle 421 and for opening or closing the dirt collecting receptacle
The power valve plate 422 of 421 collection ports；
When charged pole piece group 41 is powered, power valve plate 422 closes the collection port of the dirt collecting receptacle 421；
When charged pole piece group 41 with it is not charged when, power valve plate 422 opens the collection port of the dirt collecting receptacle 421.
In the present embodiment, when charged pole piece group 41 is powered, power valve plate 422 is closed the dirt collecting receptacle 421 and is received
Ji Kou；When charged pole piece group 41 with it is not charged when, power valve plate 422 opens the collection port of the dirt collecting receptacle 421.Dynamic valve
The setting of the structure of plate 422 and principle so that when charged pole piece group 41 carries out filtering absorption work, collect in dirt collecting receptacle
The bulky grain thing of PM10 and the above in 421 will not fly out dirt collecting receptacle 421 in the presence of electric charge and air draught, make
Into the secondary pollution of filtered air.When charged pole piece group 41 does not carry out filtering absorption work, power valve plate 422 is opened, and is inhaled
The PM10 and the bulky grain thing of the above being attached in charged pole piece group 41 under gravity, fall into dirt collecting receptacle 421 and receive
Collection is intraoral, realizes the self-cleaning function of pre-filtrating equipment 4.
The utility model also includes the work for commanding or controlling pre-filtrating equipment 4, filter 5 and suction apparatus 6
Controller.
The utility model also includes detection means, for detecting the power of suction apparatus 6 and/or treating the air-flow of contaminated air
The parameter of pressure and/or flow velocity, and the data transfer that will be detected is to controller, when the data for detecting are less than setting value,
Controller sends the signal for needing to change and/or safeguard pre-filtrating equipment 4 and/or filter 5.
The filter 5 includes what is set gradually：
Low efficient filter 51, the particulate matter for filtering PM5 and the above；
Medium effeciency filter 52, the particulate matter for filtering PM2.5 and the above；
Electrostatic filter 53, the particulate matter for filtering PM1 and the above.
In the present embodiment, filter 5 also includes one or more the free fluorescent tubes being arranged on electrostatic filter 53, tool
There is sterilizing.
Preferably, dust collecting installation 42 also includes dust collection funnel 423, the lower end of the dust collection funnel 423
Collection port with dirt collecting receptacle 421 is connected.
Dust collection funnel 423 is mainly the collection area of the collection port of dirt collection vessel 421 so that dust is more
Easily fall into the collection port of dirt collecting receptacle 421.
Described suction apparatus 6 is one or more blower fans, and blower fan is arranged on suction inlet 2 or the inner side of exhaust outlet 3.
As shown in figure 4, a kind of air filtering method based on urban air filter station that the utility model is provided, including with
Lower step：
The contaminated air of urban environment is taken from suction；
The bulky grain thing of PM10 and the above in the air of filtering and/or treatment suction；
Particulate matter in the air of filtering and/or treatment suction between PM1 to PM10；
The treated air without dust is dispersed into air.
Operation principle of the present utility model is as follows：
The utility model offer ground urban air filter station is filtered or cleaned under the control of the controller, maintenance mans
Make.When the utility model carries out air filtration, contaminated air enters from suction inlet 2, and now, charged pole piece group 41 is powered, pollution
Air filters out the bulky grain thing of PM10 and the above in the presence of charged pole piece group 41, the sky after being filtered through pre-filtrating equipment 4
Gas enters filter chamber through the through hole on the cut-off of housing 1 11, respectively through low efficient filter 51, filters out the particle of PM5 and the above
Thing；Medium effeciency filter 52, filters out the particulate matter of PM2.5 and the above；Electrostatic filter 53, filters out the particle of PM1 and the above
Thing；Free fluorescent tube, sterilizing is carried out to the air after filtering.During filtering, detection means, for detecting suction dress
The power for putting 6 and/or the stream pressure for treating contaminated air and/or the parameter of flow velocity, and the data transfer that will be detected is to control
Device, when the data for detecting are less than setting value, controller sends needs and changes and/or safeguard pre-filtrating equipment 4 and/or filtering
The signal of device 5.The cleaning of pre-filtrating equipment 4, only need to make charged pole piece group 41 not charged, adsorb in charged pole piece group 41
The bulky grain thing of PM10 and the above under gravity, is fallen into the collection port of dirt collecting receptacle 421, realizes pre-filtrating equipment
4 self-cleaning function.The maintenance of filter 5, then needing to take out corresponding filter carries out maintenance work.
Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of urban air filter station, it is characterised in that including：
Suction apparatus, for sucking contaminated air by suction inlet；
Pre-filtrating equipment, for the bulky grain thing of PM10 and the above in the contaminated air of filtration treatment suction；
Filter, the contaminated air for filtering and processing suction；
One or more exhaust outlets, for the air after filtering to be dispersed into air；
The contaminated air of suction, respectively through the treatment of pre-filtrating equipment and filter after, be dispersed into air by exhaust outlet
In.
2. urban air filter station according to claim 1, it is characterised in that the pre-filtrating equipment, including one group or
Multigroup charged pole piece group, the bulky grain thing for adsorbing PM10 and the above in contaminated air；
And the dust collecting installation below charged pole piece group is arranged on, the dust collecting installation is used to collect charged pole piece group
The PM10 of absorption and the bulky grain thing of the above.
3. urban air filter station according to claim 2, it is characterised in that the charged pole piece group includes lotus positive electrode
Piece group and bear electrode slice group；
The lotus electrode film group, including multiple is centrally located at same level and vertical spaced lotus electrode film；
The bear electrode slice group, including multiple is centrally located at same level and vertical spaced bear electrode slice；
The lotus electrode film group is arranged above or below bear electrode slice group, lotus electrode film group and bear electrode slice group
Between be provided with for the gap by contaminated air；
When the lotus electrode film group is arranged at the top of bear electrode slice group, the lower end of lotus electrode film group is less than bear electricity
The upper end of pole piece group；
When the lotus electrode film group is arranged at the lower section of bear electrode slice group, bear electrode slice group lower end is less than lotus positive electrode
The upper end of piece group.
4. urban air filter station according to claim 3, it is characterised in that the lotus electrode film and bear electrode slice
It is arc-shaped electrode piece.
5. urban air filter station according to claim 2, it is characterised in that the dust collecting installation includes that dust is received
Collection container and the power valve plate for opening or closing the dirt collecting receptacle collection port；
When charged pole piece group is powered, power valve plate closes the dirt collecting receptacle collection port；
When charged pole piece group band is not charged, power valve plate opens the dirt collecting receptacle collection port.
6. urban air filter station according to claim 1, it is characterised in that also including for commanding or controlling pre-filtering
The controller of the work of device, filter and suction apparatus.
7. urban air filter station according to claim 1, it is characterised in that also including detection means, inhales for detecting
The power for entering device and/or the stream pressure for treating contaminated air and/or the parameter of flow velocity, and the data transfer that will be detected is to control
Device processed, when the data for detecting are less than setting value, controller sends needs and changes and/or safeguard pre-filtrating equipment and/or mistake
Filter the signal of device.
8. urban air filter station according to claim 1, it is characterised in that the filter includes setting gradually
's：
Low efficient filter, the particulate matter for filtering PM5 and the above；
Medium effeciency filter, the particulate matter for filtering PM2.5 and the above；
Electrostatic filter, the particulate matter for filtering PM1 and the above.
9. urban air filter station according to claim 5, it is characterised in that dust collecting installation is also collected including dust
Funnel, the lower end of the dust collection funnel connects with the collection port of dirt collecting receptacle.
10. urban air filter station according to claim 1, it is characterised in that described suction apparatus is or many
Individual blower fan, blower fan is arranged on suction inlet or exhaust outlet inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621360230.XU CN206295752U (en) | 2016-12-12 | 2016-12-12 | Urban air filter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621360230.XU CN206295752U (en) | 2016-12-12 | 2016-12-12 | Urban air filter station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206295752U true CN206295752U (en) | 2017-07-04 |
Family
ID=59213554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621360230.XU Active CN206295752U (en) | 2016-12-12 | 2016-12-12 | Urban air filter station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206295752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731379A (en) * | 2016-12-12 | 2017-05-31 | 易净环境科技（上海）有限公司 | Urban air filter station and the air filtering method based on this |
-
2016
- 2016-12-12 CN CN201621360230.XU patent/CN206295752U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731379A (en) * | 2016-12-12 | 2017-05-31 | 易净环境科技（上海）有限公司 | Urban air filter station and the air filtering method based on this |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240511 Address after: Economic Development Zone, Xiaoyun Town, Jinxiang County, Jining City, Shandong Province Patentee after: SHANDONG CHISHENG NEW ENERGY EQUIPMENT CO.,LTD. Country or region after: China Address before: Room 2629, 2nd Floor, Building 8, No. 16 Boyang Road, Yangpu District, Shanghai, 200090 Patentee before: YIJING ENVIRONMENTAL TECHNOLOGY (SHANGHAI) CO.,LTD. Country or region before: China |