CN105807010B - A kind of air exhausting structure of indoor air environment monitoring device - Google Patents
A kind of air exhausting structure of indoor air environment monitoring device Download PDFInfo
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- CN105807010B CN105807010B CN201610299352.0A CN201610299352A CN105807010B CN 105807010 B CN105807010 B CN 105807010B CN 201610299352 A CN201610299352 A CN 201610299352A CN 105807010 B CN105807010 B CN 105807010B
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- air
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- environment monitoring
- head cover
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Ventilation (AREA)
Abstract
The invention belongs to enviromental monitoring equipment fields, specifically, being related to a kind of air exhausting structure of indoor air environment monitoring device, indoor air environment monitoring device is internally provided with detection air duct, and air exhausting structure is equipped at the air outlet in air duct；The case top of indoor air environment monitoring device is equipped with the outlet air groove being connected with air outlet, is equipped with head cover at outlet air groove upper end opening, is separated by a certain distance between head cover and bottom portion of groove；At a distance of certain interval to constitute outlet air gap between the periphery and the side wall of outlet air groove of head cover; the upper opening of shell is equipped with inside edge; overhead gage of the outlet air groove by inside edge and for installing air outlet is constituted; overhead gage forms the bottom portion of groove of sealing with infolding edge lap; by the way that outlet air groove is arranged; and head cover will be installed at outlet air groove upper end opening; air outlet is cleverly buried under head cover by the air exhausting structure; internal electric elements are effectively played the role of protection by the instillation for avoiding top foreign matter.
Description
Technical field
The invention belongs to enviromental monitoring equipment fields, specifically, being related to a kind of going out for indoor air environment monitoring device
Wind structure.
Background technology
In recent years, air pollution problems inherent getting worse, regional atmosphere pollution particularly highlight, and haze affects going out for people
Row, the fine particles pollutions such as PM2.5 cause the extensive concern of the common people.The complicated component of outdoor pollutant leads to indoor gas
Pollution is also polluted by pernicious gases such as traditional formaldehyde, carbon monoxide, is become for formaldehyde, carbon monoxide and PM2.5 particulate matters
The gas-solid comprehensive contact scar Deng caused by, people are also more next to the attention rate of air quality situation in surrounding office and living environment
It is higher.
Currently, mostly using hand-held tester for the detection of room air on the market, such detection device, which has, to be convenient for
Carry, it is easy to use the advantages that, in use, by the triggering to the button on detector, display shows present air matter
Situation is measured, but such detector cannot achieve and constantly detect and track, and also the air outlet of such detector is set to shell
In plane, spacer foreign matter is not set with the position of extraneous unicom and is easy to instill, and air outlet is set to surface, seriously affects
It is beautiful.
In view of this special to propose the present invention.
Invention content
The technical problem to be solved in the present invention is that overcoming the deficiencies of the prior art and provide air exhausting structure hides air outlet
Under head cover, the instillation of top foreign matter is avoided, effectively plays the role of protection to internal electric elements, while making outlet air
Place is more beautiful；Cushioning effect is realized in gas outlet by air exhausting structure, prevents damage of the gas to the electric elements being arranged on head cover
It is bad, simple in structure, the air exhausting structure of the indoor detection interior air environment monitoring equipment of maintenance easy to disassemble.
In order to solve the above technical problems, the present invention is using the basic conception of technical solution：
A kind of air exhausting structure of indoor air environment monitoring device, indoor air environment monitoring device are internally provided with detection wind
Road detects and is equipped with air exhausting structure at the air outlet in air duct；The case top of indoor air environment monitoring device is equipped with and air outlet
The outlet air groove being connected is equipped with head cover at outlet air groove upper end opening, is separated by a certain distance between head cover and bottom portion of groove；
At a distance of certain interval to constitute outlet air gap between the periphery and the side wall of outlet air groove of head cover.
The upper opening of the shell is equipped with inside edge, and the outlet air groove is made of inside edge and detection air duct overhead gage,
The overhead gage forms the bottom portion of groove of sealing with infolding edge lap, and the overhead gage is equipped with to be gone out with what detection air duct was connected
Air port；
Preferably, the overhead gage is integrated with shell, and the top of shell is enabled directly to form outlet air groove；
It is further preferred that the overhead gage is removably mounted to detection air duct.
Further include supporting rib, the supporting rib is set to overhead gage upper surface or head cover lower surface, head cover are taken through supporting rib
It is placed on overhead gage, makes to be separated by a certain distance between head cover and bottom portion of groove.
The overhead gage forms cavity to lower recess, and a plurality of supporting rib is arranged at the edge of cavity；Each supporting rib edge respectively
Radial setting, and angle is uniformly distributed at equal intervals along the periphery of groove.
Be equipped with reinforcing rib in the cavity, the reinforcing rib extend outwardly and with supporting rib corresponding connection one by one.
The opening of the head cover and outlet air groove is concentric not isometrical setting, and between head cover periphery and outlet air groove between
The outlet air gap that gap is constituted is divided into mutually independent multistage through each supporting rib.
The bottom centre position in outlet air groove is arranged in the air outlet.
The bottom of the outlet air groove is additionally provided with the through-hole being connected with the electric panel room of indoor air environment monitoring device.
The side wall of the outlet air groove is the inclined-plane gradually narrowed from up to down.
The overhead gage is connected by screw with head cover.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：By the way that outlet air is arranged
Groove, and will head cover be installed at outlet air groove upper end opening, which is cleverly buried in air outlet under head cover, avoids
Internal electric elements are effectively played the role of protection, while keeping wind outlet more beautiful by the instillation of top foreign matter；It is logical
It crosses and inside edge is set on shell, inside edge and the overhead gage for installing air outlet constitute outlet air groove, overhead gage and infolding
Edge lap forms the bottom portion of groove of sealing, which makes overhead gage be detachably connected with shell realization, electrical convenient for enclosure interior
The maintenance of element, while also allowing for the cleaning of shell；By the way that supporting rib is arranged, keep the bottom interval of head cover and outlet air groove certain
Distance provides enough spaces for the outflow of gas, while the electrical equipment for bottom cover installation provides installation space；By upper
Cavity is set on baffle, and the gas to be flowed out from air outlet provides cushion space, prevents gas exit velocity too fast, to electricity
Gas element damages, while cavity provides sufficient installation space for the electrical equipment installed on head cover；Supporting rib is radially set
It sets, it is in the same direction with gas flow direction, it is convenient for the discharge of gas；Along the periphery of groove, angle is uniformly distributed supporting rib at equal intervals,
When gas being made to be discharged, the air exhausting structure all directions stress of indoor air environment monitoring device balances each other；Reinforcing rib is set, effectively
The intensity for improving cavity, reinforcing rib also acts as the effect of gas dispersion simultaneously, and reinforcing rib is extended outwardly and and supporting rib
Corresponding connection one by one is more convenient duct discharge of the gas of dispersion between supporting rib；Air outlet is set to outlet air groove
Bottom, keep distance of the gas away from outlet air gap identical, improve indoor air environment monitoring device air exhausting structure all directions
The equilibrium degree of stress；The bottom of outlet air groove be additionally provided be connected with the electric panel room of indoor air environment monitoring device it is logical
Hole, the circuit convenient for being connected with electrical equipment on bottom cover pass through, while the hole can also be used as the heat emission hole of electric panel room, improve electricity
The radiating efficiency of gas chamber；The side wall of outlet air groove is the inclined-plane gradually narrowed from up to down, which, which has gas discharge, leads
It is identical as the direction of gas discharge to effect, the resistance suffered by the gas of air outlet is reduced, gas expulsion efficiency is improved；Upper gear
Plate is detachably installed with head cover, convenient for the repair for the electrical equipment installed on head cover.
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings.
Description of the drawings
A part of the attached drawing as the application, for providing further understanding of the invention, of the invention is schematic
Embodiment and its explanation do not constitute inappropriate limitation of the present invention for explaining the present invention.Obviously, the accompanying drawings in the following description
Only some embodiments to those skilled in the art without creative efforts, can be with
Other accompanying drawings can also be obtained according to these attached drawings.In the accompanying drawings：
Fig. 1 is the air exhausting structure schematic diagram of the present invention；
Fig. 2 is one structural schematic diagram of the embodiment of the present invention；
Fig. 3 is two structural schematic diagram of the embodiment of the present invention；
Fig. 4 is three structural schematic diagram of the embodiment of the present invention；
Fig. 5 is the embodiment of the present invention four, five structural schematic diagrams；
Fig. 6 is airflow direction schematic diagram of the present invention.
In figure：200, shell 201, inside edge 301, detection air duct 302, air outlet 303, outlet air groove 304, top
Lid 305, outlet air gap 306, overhead gage 307, supporting rib 308, cavity 309, reinforcing rib 310, through-hole
It should be noted that these attached drawings and verbal description are not intended to the design model limiting the invention in any way
It encloses, but is that those skilled in the art illustrate idea of the invention by referring to specific embodiments.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in embodiment is clearly and completely described, following embodiment for illustrating the present invention, but
It is not limited to the scope of the present invention.
As shown in Figure 1, in the present embodiment, a kind of air exhausting structure of indoor air environment monitoring device, indoor air environment
Monitoring device is internally provided with detection air duct 301, and air exhausting structure is equipped at the air outlet 302 in air duct；Indoor air environment monitors
200 top of shell of equipment is equipped with the outlet air groove 303 being connected with air outlet, is equipped at 303 upper end opening of outlet air groove
Head cover 304, head cover 304 and outlet air groove are separated by a certain distance between 303 bottom；The periphery of head cover 304 and outlet air groove 303
At a distance of certain interval to constitute outlet air gap 305 between side wall.
By the way that outlet air groove 303 is arranged, and will head cover 304 be installed at 303 upper end opening of outlet air groove, the air exhausting structure is skilful
Wonderful is buried in air outlet 302 under head cover 304, avoids the instillation of top foreign matter, is effectively played to internal electric elements
The effect of protection, while keeping the wind outlet more beautiful.
Embodiment one：
As shown in Figs. 1-2, in the present embodiment, the shell 200 of indoor air environment monitoring device is the tubular of both ends open
The upper opening of structure, shell 200 is equipped with inside edge 201, and outlet air groove 303 is by inside edge 201 and for installing air outlet 302
Overhead gage 306 is constituted, 303 bottom of outlet air groove of overhead gage 306 and the overlap joint formation sealing of inside edge 201, fixed on head cover 304
It is provided with supporting rib 307, head cover 304 is placed on through supporting rib 307 on overhead gage 306, makes head cover 304 and 303 bottom of outlet air groove
It is separated by a certain distance between portion, overhead gage 306 is to be removably mounted to detection air duct, enables the top of shell directly form outlet air recessed
Slot 303；Head cover is connected by screw with overhead gage.
Wherein overhead gage can also be integrated with shell, or independently of the discrete item of shell and detection air duct.
By the way that inside edge 201 is arranged on shell, inside edge 201 and the overhead gage for installing air outlet 302 are constituted out
Wind groove 303, overhead gage 306 form the bottom of the outlet air groove 303 of sealing with the overlap joint of inside edge 201, which makes overhead gage
306 are detachably connected with the realization of shell 200, are convenient for the maintenance of 200 electric elements inside of shell, while also allowing for shell 200
Supporting rib 307 is fixedly installed on head cover 304 for cleaning, for making between 303 bottom of head cover 304 and outlet air groove at a distance of a spacing
From making gas be discharged.
Embodiment two：
As shown in Figure 1, Figure 3, in the present embodiment, the shell 200 of indoor air environment monitoring device is the cylinder of both ends open
The upper opening of shape structure, shell 200 is equipped with inside edge 201, and outlet air groove 303 is by inside edge 201 and for installing air outlet 302
Overhead gage 306 constitute, overhead gage 306 and inside edge 201 overlap joint form 303 bottom of outlet air groove of sealing, and overhead gage 306 is
Slab construction, overhead gage 306 are to be removably mounted to detection air duct, and the top of shell is enabled directly to form outlet air groove 303；Upper gear
Plate 306 is fixedly installed supporting rib 307, and head cover 304 is placed on through supporting rib 307 on overhead gage, makes head cover 304 and outlet air groove
It is separated by a certain distance between 303 bottoms, head cover is connected by screw with overhead gage.
Wherein overhead gage can also be integrated with shell, or independently of the discrete item of shell and detection air duct.
Embodiment three：
As Figure 1 and Figure 4, difference lies in overhead gage 306 is the frame for installing detection air duct 301 with embodiment two
The upper plate of frame, 306 middle part of overhead gage form cavity 308 to lower recess, and a plurality of supporting rib 307 is arranged at the edge of cavity 308,
Each supporting rib 307 is disposed radially respectively, and angle is uniformly distributed at equal intervals along the periphery of cavity 308.
Wherein, supporting rib 307 non-radial can also be arranged, can also along the periphery of cavity 308 at equal intervals angle it is non-
Even distribution.
On the one hand, electrical equipment is set on upper lid, by the way that cavity 308 is arranged, abundance is provided for the installation of electrical equipment
Space, on the other hand compared with overhead gage 306 is slab construction, cavity 308 increases the space of 302 position of air outlet, increases
Cushion space, prevents the too fast damage caused to electric elements of gas exit velocity；Each supporting rib 307 is radially set respectively
It sets, so that gas is flowed out after the discharge of air outlet 302 more smooth, be discharged convenient for gas, supporting rib 307 is along outlet air groove 303
Angle is uniformly distributed at equal intervals for periphery, makes the air exhausting structure all directions stress balance of indoor air environment monitoring device, simultaneously
It is more beautiful.
Example IV：
As shown in Figure 1, shown in Figure 5, with embodiment three difference lies in being equipped with reinforcing rib 309 in, cavity 308, reinforcing rib 309 to
Outer extension and with the corresponding connection one by one of supporting rib 307, the opening of head cover 304 and outlet air groove 303 not isometrical sets to be concentric
Set, make to form outlet air gap 305 between head cover 304 and outlet air groove 303, and between 304 periphery of head cover and outlet air groove 303 between
The outlet air gap 305 that gap is constituted is divided through each supporting rib 307 for mutually independent multistage.
By setting reinforcing rib, the intensity of cavity is effectively raised, reinforcing rib also acts as the effect of gas dispersion simultaneously,
By reinforcing rib extend outwardly and with supporting rib corresponding connection one by one, be more convenient channel of the gas between supporting rib of dispersion
Discharge.
Embodiment five：
As shown in Figure 1, shown in Figure 5, difference lies in air outlet 302 is arranged in the bottom of outlet air groove 303 with example IV
Center, the bottom of outlet air groove 303 are additionally provided with the through-hole being connected with the electric panel room of indoor air environment monitoring device, go out
The side wall of wind groove 303 is the inclined-plane gradually narrowed from up to down, and overhead gage 306 is connected by screw with head cover 304.
Wherein, side wall can also be vertical plane or the bottom-up inclined-plane gradually narrowed, it is preferred that from up to down gradually
Narrowed inclined-plane, airflow direction keep gas flow more smooth according to direction as shown in Figure 6, the structure；Air outlet can also
Bottom non-central location in outlet air groove is set, it is preferred that center, which makes gas to the distance of gap position
It is equal, so that the air exhausting structure stress of indoor air environment monitoring device is more balanced；Electrical member of the through-hole for being installed on upper lid
The circuit of part passes through, while being also conducive to heat dissipation, and grafting can also be used with head cover in overhead gage, snap fit is connect.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this patent
Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompt make it is a little change or be modified to
The equivalent embodiment of equivalent variations, it is right according to the technical essence of the invention as long as being the content without departing from technical solution of the present invention
Any simple modification, equivalent change and modification made by above example, in the range of still falling within the present invention program.
Claims (12)
1. a kind of air exhausting structure of indoor air environment monitoring device, indoor air environment monitoring device are internally provided with detection wind
Road detects and is equipped with air exhausting structure at the air outlet in air duct；It is characterized in that：The case top of indoor air environment monitoring device is set
There is the outlet air groove being connected with air outlet, head cover is installed at outlet air groove upper end opening, phase between head cover and bottom portion of groove
Away from certain distance；At a distance of certain interval to constitute outlet air gap, the shell between the periphery and the side wall of outlet air groove of head cover
Upper opening be equipped with inside edge, the outlet air groove is ridden over and is constituted in inside edge by detecting air duct overhead gage.
2. a kind of air exhausting structure of indoor air environment monitoring device according to claim 1, it is characterised in that：Shell is
The upper opening of the tubular structure of both ends open, the tubular structure is equipped with inside edge, and the overhead gage is formed with infolding edge lap
The bottom portion of groove of sealing, the overhead gage are equipped with the air outlet being connected with detection air duct.
3. a kind of air exhausting structure of indoor air environment monitoring device according to claim 2, it is characterised in that：On described
Baffle is integrated with shell, and the top of shell is enabled directly to form outlet air groove.
4. a kind of air exhausting structure of indoor air environment monitoring device according to claim 3, it is characterised in that：On described
Baffle is removably mounted to detection air duct.
5. according to a kind of air exhausting structure of any indoor air environment monitoring devices of claim 2-4, it is characterised in that：
Further include supporting rib, the supporting rib is set to overhead gage upper surface or head cover lower surface, and head cover is placed on upper gear through supporting rib
On plate, make to be separated by a certain distance between head cover and bottom portion of groove.
6. a kind of air exhausting structure of indoor air environment monitoring device according to claim 5, it is characterised in that：On described
Baffle forms cavity to lower recess, and a plurality of supporting rib is arranged at the edge of cavity；Each supporting rib is disposed radially respectively, and edge
Angle is uniformly distributed at equal intervals for the periphery of cavity.
7. a kind of air exhausting structure of indoor air environment monitoring device according to claim 6, it is characterised in that：It is described recessed
Intracavitary be equipped with reinforcing rib, the reinforcing rib extend outwardly and with supporting rib corresponding connection one by one.
8. a kind of air exhausting structure of indoor air environment monitoring device according to claim 7, it is characterised in that：Described
The opening of head cover and outlet air groove is concentric not isometrical setting, and the outlet air seam that gap is constituted between head cover periphery and outlet air groove
Gap is divided into mutually independent multistage through each supporting rib.
9. according to claim 1-4, a kind of air exhausting structure of any indoor air environment monitoring devices of 6-8, feature
It is：The bottom centre position in outlet air groove is arranged in the air outlet.
10. a kind of air exhausting structure of indoor air environment monitoring device according to claim 9, it is characterised in that：It is described
The bottom of outlet air groove is additionally provided with the through-hole being connected with the electric panel room of indoor air environment monitoring device.
11. a kind of air exhausting structure of indoor air environment monitoring device according to claim 10, it is characterised in that：It is described
The side wall of outlet air groove is the inclined-plane gradually narrowed from up to down.
12. according to claim 2-4,6-8,10, a kind of air exhausting structure of 11 any indoor air environment monitoring devices,
It is characterized in that：The overhead gage is connected by screw with head cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610299352.0A CN105807010B (en) | 2016-05-06 | 2016-05-06 | A kind of air exhausting structure of indoor air environment monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610299352.0A CN105807010B (en) | 2016-05-06 | 2016-05-06 | A kind of air exhausting structure of indoor air environment monitoring device |
Publications (2)
| Publication Number | Publication Date |
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| CN105807010A CN105807010A (en) | 2016-07-27 |
| CN105807010B true CN105807010B (en) | 2018-11-09 |
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ID=56455435
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610299352.0A Expired - Fee Related CN105807010B (en) | 2016-05-06 | 2016-05-06 | A kind of air exhausting structure of indoor air environment monitoring device |
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| CN104984374A (en) * | 2015-07-20 | 2015-10-21 | 倪向东 | Drying sterilizer |
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| CN205656184U (en) * | 2016-05-06 | 2016-10-19 | 中科同德（北京）生态科技有限公司 | Indoor air circumstance monitoring facilities's air -out structure |
-
2016
- 2016-05-06 CN CN201610299352.0A patent/CN105807010B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2386225Y (en) * | 1999-07-12 | 2000-07-05 | 黄诣壬 | Driving louver natural ventilator |
| CN2419529Y (en) * | 2000-04-05 | 2001-02-14 | 李志荣 | Protecting cover for outdoor unit of air conditioner |
| CN101881476A (en) * | 2010-06-22 | 2010-11-10 | 宁波方太厨具有限公司 | Air outlet device used for range hood |
| CN202851903U (en) * | 2012-11-05 | 2013-04-03 | 重庆茂捷汽车零部件有限公司 | Exhaust plug for speed changer |
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| Publication number | Publication date |
|---|---|
| CN105807010A (en) | 2016-07-27 |
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Denomination of invention: Air outlet structure of indoor air environment monitoring equipment Effective date of registration: 20200413 Granted publication date: 20181109 Pledgee: Beijing Intellectual Property Management Co.,Ltd. Pledgor: ZHONGKE TONGDE (BEIJING) ECOLOGICAL TECHNOLOGY Co.,Ltd. Registration number: Y2020990000312 |
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