CN105909000B - Between the sterile gas lock of the stream of people/logistics - Google Patents
Between the sterile gas lock of the stream of people/logistics Download PDFInfo
- Publication number
- CN105909000B CN105909000B CN201610379717.0A CN201610379717A CN105909000B CN 105909000 B CN105909000 B CN 105909000B CN 201610379717 A CN201610379717 A CN 201610379717A CN 105909000 B CN105909000 B CN 105909000B
- Authority
- CN
- China
- Prior art keywords
- internal box
- wall
- gas lock
- outer case
- plenum chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000001351 cycling effect Effects 0.000 claims abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000001954 sterilising effect Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000012864 cross contamination Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 61
- 230000003749 cleanliness Effects 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 244000005700 microbiome Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H1/00—Buildings or groups of buildings for dwelling or office purposes; General layout, e.g. modular co-ordination or staggered storeys
- E04H1/12—Small buildings or other erections for limited occupation, erected in the open air or arranged in buildings, e.g. kiosks, waiting shelters for bus stops or for filling stations, roofs for railway platforms, watchmen's huts or dressing cubicles
- E04H1/1277—Shelters for decontamination
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention discloses between a kind of sterile gas lock of the stream of people/logistics, it includes outer case and internal box, and the internal box in the outer case, has interval between the top surface wall of internal box and outer case between the wall of the right side；The top of internal box is equipped with plenum chamber；The width of plenum chamber is less than the width of the internal box；On the top surface wall of plenum chamber, fresh air motor-driven valve and fresh-air fan are set；The wall that plenum chamber is contacted with internal box is arranged to homogenizing plate, and high efficiency particulate air filter is set above homogenizing plate；Cycling air-valve is provided on the right side wall of plenum chamber；On the top surface wall of outer case, air draft motor-driven valve, exhaust fan and ozone machine are set；Air draft motor-driven valve, exhaust fan and ozone machine are outside plenum chamber；The right side wall bottom of internal box sets return air inlet.Two different clean areas can not only effectively be separated between the gas lock, prevent cross contamination；And can thoroughly sterilize, dedusting, meet purity requirements in the pharmaceutical technology flow of higher lustration class.
Description
Technical field
Sterilizing, dust-extraction unit technical field the present invention relates to sterile workshop, and in particular to a kind of sterile gas of the stream of people/logistics
Between lock.
Background technology
The surge chamber set between gas lock for the clean indoor air purity of holding and over-pressure control.It is usually set between gas lock
It puts between two different identical clean areas or clean area of cleanliness factor and non-clean area.Have two fans cannot be same between gas lock
The door of Shi Kaiqi the purpose is to separate the air of two different clean environments, prevents pollution air from entering clean area, can also prevent
Only cross contamination.It is divided between gas lock between personnel's gas lock between material gas lock.
Way and present toilet's way are essentially identical between currently used gas lock, only serve common cushioning effect, when
When personnel or material enter desinfection chamber, part bacterium, microorganism will be inevitably carried into desinfection chamber, it is impossible to
Reach the sterility requirements of desinfection chamber.With the development of pharmacy cause, control of the medical toilet to bacterium, microorganism in pharmacy procedure
System requirement is more and more stringenter, and way can not meet cleanliness factor in the pharmaceutical technology flow of higher lustration class between traditional gas lock
Requirement.
The content of the invention
[technical problems to be solved]
It, should between a kind of new sterile gas lock of the stream of people/logistics is provided present invention aim to address above-mentioned prior art problem
The air of two different clean environments can not only effectively be separated between gas lock, prevent cross contamination；And can thoroughly sterilize, dedusting,
Meet purity requirements in the pharmaceutical technology flow of higher lustration class.
[technical solution]
In order to reach above-mentioned technique effect, the present invention takes following technical scheme：
Between a kind of sterile gas lock of the stream of people/logistics, it include outer case and internal box, the internal box in the outer case, institute
It states internal box and shares left side wall, bottom surface wall, front wall and wall, and the internal box and outer container below with outer case
There is interval between the top surface wall of body, also have interval between the right side wall of the internal box and outer case；The front of the internal box
Bio-safety sealed door is set respectively on wall and below wall；The top of the internal box is equipped with plenum chamber, the plenum chamber
Top surface wall, left side wall, front wall and wall below are shared with outer case；The width of the plenum chamber is less than the interior case
The width of body；Set fresh air motor-driven valve, babinet are interior fresh-air fan is set on the top surface wall of the plenum chamber, outside babinet；Institute
It states the wall that plenum chamber is contacted with internal box and is arranged to homogenizing plate, high efficiency particulate air filter is set above the homogenizing plate；The static pressure
Cycling air-valve is provided on the right side wall of case；On the top surface wall of the outer case, air draft motor-driven valve, case are set outside babinet
Exhaust fan and ozone machine are set in vivo；The air draft motor-driven valve, exhaust fan and ozone machine are outside plenum chamber；The internal box
Right side wall bottom set return air inlet.
The present invention further technical solution sets ozone transmitter, and institute on the top surface wall of the internal box
Ozone transmitter connection PLC control system is stated, the PLC control system is between gas lock in switch board.
The present invention further technical solution sets the magnetic key operated lock that band is fed back on the bio-safety sealed door, described
Magnetic key operated lock is equipped with Double-door mutual-locking system, and the Double-door mutual-locking system is connected with the PLC control system.
The further technical solution of the present invention, the bio-safety sealed door are equipped with observation window and door open button.
Between the gas lock in switch board, H is set under PLC control system for the present invention further technical solution2O2
The installation site of generator can dispense.
The further technical solution of the present invention, the PLC control system are connected with operation panel, the operation panel peace
On the front wall of internal box, and there is human-computer interaction interface on the operation panel.
The present invention further technical solution is provided on the outside wall of the outer case and the side wall body of internal box
For detecting the differential pressure pickup of pressure difference signal, the differential pressure pickup is connected with the PLC control system.
The ratio of the further technical solution of the present invention, the width of the internal box and the width of outer case is 8~9：
10。
The opening of fresh air motor-driven valve of the present invention is towards wall behind outer case；The opening direction of the air draft motor-driven valve
Outer case front wall.
Frame between gas lock of the present invention welds plastic-spraying using galvanized sheet, and internal wall uses stainless steel hanging buckle.
It will be described in detail the present invention below.
It can be used as between stream of people's gas lock between logistics gas lock, specifically needing user in use between the gas lock of the present invention,
It is made choice on operation panel；When as between stream of people's gas lock, user can enter opposite side by one side and go out；When as logistics
When between gas lock, i.e., the transmission terminal of material, user can only go out when in use from same side door into or with side door.The present invention's
Between gas lock between low cleanliness factor and the region of high-cleanness, high, bio-safety sealed door is separately positioned on low cleanliness factor and noble and unsullied
The region of cleanliness is so as to connect above-mentioned two region between gas lock.The present invention passes through the opening to fresh air motor-driven valve and air draft motor-driven valve
Design, ensureing the air of discharge will not directly be absorbed by fresh air motor-driven valve and be sent into gas lock, to ensure the relatively clean of wind regime
Cleanliness.In addition, middle PLC control system is connected with ozone transmitter, differential pressure pickup between the gas lock of the present invention, it can be by smelly
Oxygen real-time concentration feedback and gas lock in low cleanliness factor region, high-cleanness, high region pressure difference feedback, realize gas lock between
Automation control.In addition the reasonable clearance shape between gas lock of the present invention between middle internal box right side wall and outer case right side wall
Into return air passageway, return air inlet can be efficiently used, the air of internal box between gas lock or ozone are sent to air draft by return air passageway
At wind turbine, air draft or recycling are carried out under the action of exhaust fan or circulated air motor-driven valve.Therefore between the gas lock of the present invention
In preparation process, the structure of air-supply passage between gas lock is simplified.
In addition, can access panel be set under the ozone transmitter of internal box between the gas lock of the present invention.The access panel is detachable.
It is whole welding mounted between the gas lock of the present invention, in-site installation need to leave the transhipment passage of equipment.
[advantageous effect]
Compared with prior art, the present invention with following advantageous effect：
Structure between gas lock using the present invention can make have ozone sterilizing function between the gas lock；Being removed gas lock
Bacterium, disinfection, ensure gas lock between and its indoor article cleaning, germ-free condition.Two differences can not only effectively be separated between the gas lock
The air of clean environment, prevents cross contamination；And can thoroughly sterilize, dedusting, meet the pharmaceutical technology stream of higher lustration class
Purity requirements in journey.In addition, it is simple in structure between the gas lock of the present invention, it is easily installed.
Description of the drawings
Dimensional structure diagrams of the Fig. 1 between the sterile gas lock of the stream of people/logistics of the present invention；
Sectional views of the Fig. 2 between the sterile gas lock of the stream of people/logistics of the present invention；
Air flow direction figures of the Fig. 3 between the sterile gas lock of the stream of people/logistics of the present invention during the self-cleaning progress of work；
Air flow direction figures of the Fig. 4 between the sterile gas lock of the stream of people/logistics of the present invention during disinfection process；
It is marked in figure as follows：
1 is internal box, and 2 be plenum chamber, and 3 be fresh air motor-driven valve, and 4 be fresh-air fan, and 5 be air draft motor-driven valve, and 6 be air draft wind
Machine, 7 be ozone machine, and 8 be Xun Huan air-valve, and 9 be high efficiency particulate air filter, and 10 be homogenizing plate, and 11 be return air inlet, and 12 be observation window, and 13 are
Operation panel, 14 be biological safe sealed door, and 15 be ozone transmitter.
Specific embodiment
With reference to the embodiment of the present invention, the invention will be further elaborated.
Embodiment：
Between a kind of sterile gas lock of the stream of people/logistics as depicted in figs. 1 and 2, it includes outer case and internal box 1, described interior
In the outer case, the internal box and outer case share left side wall, bottom surface wall, front wall and wall below to babinet 1, and
And have interval between the internal box and the top surface wall of outer case, between also having between the right side wall of the internal box and outer case
Every；The front wall of the internal box and bio-safety sealed door 14 is set respectively on wall below；The top of the internal box
Equipped with plenum chamber 2, the plenum chamber 2 and outer case share top surface wall, left side wall, front wall and wall below；It is described
The width of plenum chamber 2 is less than the width of the internal box 1；Fresh air electricity is set on the top surface wall of the plenum chamber, outside babinet
Fresh-air fan 4 is set in dynamic valve 3, babinet；The wall that the plenum chamber is contacted with internal box is arranged to homogenizing plate 10, described to flow
High efficiency particulate air filter 9 is set above plate；Xun Huan air-valve 8 is provided on the right side wall of the plenum chamber；On the top of the outer case
Set air draft motor-driven valve 5, babinet are interior exhaust fan 6 and ozone machine 7 are set on face wall body, outside babinet；The air draft motor-driven valve 5,
Exhaust fan 6 and ozone machine 7 are outside plenum chamber 2；The right side wall bottom of the internal box sets return air inlet 11.The internal box
Top surface wall on ozone transmitter 15, and the ozone transmitter 15 connection PLC control system, the PLC controls are set
System is between gas lock in switch board.Magnetic key operated lock with feedback is set on the bio-safety sealed door, and the magnetic key operated lock is set
There is Double-door mutual-locking system, and the Double-door mutual-locking system is connected with the PLC control system.The Double-door mutual-locking system is
A door can only be opened.
The further technical solution of the present invention, the bio-safety sealed door are equipped with observation window 12 and door open button.
Between the gas lock in switch board, H is set under PLC control system for one embodiment of the invention2O2
Generator.Switch board can reserve installation site between the gas lock, be confirmed whether to install H according to customer demand2O2Generator.Pass through
H2O2The setting of generator, the H that can be further generated using generator2O2Carry out disinfection sterilizing.
Specific embodiments of the present invention, the PLC control system are connected with operation panel 13, and the operation panel 13 is pacified
On the front wall of internal box, and there is human-computer interaction interface on the operation panel 13.
Specific embodiments of the present invention are set respectively on the outside wall of the outer case and on the side wall body of internal box
The differential pressure pickup of detection pressure difference signal is useful for, the differential pressure pickup is connected with the PLC control system.
In the present invention, the differential pressure pickup is to internal box and low cleanliness factor region, internal box and high-cleanness, high region
Pressure difference parameter feedback.Between gas lock of the present invention in purification process, ensure that its pressure difference parameter error is no more than ± 2Pa.
The ratio of specific embodiments of the present invention, the width of the internal box and the width of outer case is 8~9： 10.
The opening of fresh air motor-driven valve of the present invention is towards wall behind outer case；The opening direction of the air draft motor-driven valve
Outer case front wall.Frame between gas lock of the present invention welds plastic-spraying using galvanized sheet, and internal wall uses stainless steel hanging buckle.
Specific embodiments of the present invention, the front wall of internal box is close to the region of low cleanliness factor between the gas lock.
When the present invention gas lock between logistics gas lock, be respectively provided with operating surface in the both sides of the bio-safety sealed door
Plate.Close to the right side in high-cleanness, high region close to shower room, and it is unidirectional logical between being locked between the gas lock of the present invention for people's gas
Row, can be not provided with operation panel.
Working condition between gas lock of the present invention includes the self-cleaning progress of work and disinfection process.
During the self-cleaning progress of work, when one side bio-safety sealed door is opened between gas lock, personnel or material enter between gas lock
Afterwards, bio-safety sealed door is turned off, when two side door of Double-door mutual-locking system feedback is turned off, system is automatically into self-cleaning shape
State.Wind speed, air quantity and clean-down capability are passed in and out according to being set on operation panel, fresh air motor-driven valve, air draft motor-driven valve between gas lock
It opens, self-cleaning is carried out under the action of fresh-air fan and exhaust fan；After personnel/material is left between gas lock, one can be also carried out
Secondary self-cleaning.In this process, the circulated air motor-driven valve is closed；The air flow direction of the process is as shown in Figure 3.
During disinfection process, according to the wind speed, air quantity and disinfecting time of setting.Automatically control close fresh air motor-driven valve,
Air draft motor-driven valve and exhaust fan open fresh-air fan and circulated air motor-driven valve, ozone machine, pass through the ozone that ozone machine generates
Internal box is slowly filled with after plenum chamber；According to the concentration feedback of ozone transmitter, the switch of ozone machine is automatically controlled.When sterilized
Between after, automatically control and open fresh air motor-driven valve, fresh-air fan, air draft motor-driven valve and exhaust fan, it is electronic to close circulated air
Valve；The discharge of ozone is carried out, until ozone concentration is diluted to safe concentration, system enters dormant state, the air-flow stream of the process
To as shown in Figure 4.
The automation control of self-purification function between gas lock is realized between the gas lock, and has not only been effectively isolated different cleanings
Area；It can also thoroughly sterilize, dedusting, meet purity requirements in the pharmaceutical technology flow of higher lustration class.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modifications and embodiment, these modifications and embodiment will fall in principle disclosed in the present application
Within scope and spirit.
Claims (6)
1. between a kind of sterile gas lock of the stream of people/logistics, it is characterised in that it includes outer case and internal box, and the internal box is in outer container
In vivo, the internal box shares left side wall, bottom surface wall, front wall and wall, and the interior case below with outer case
There is interval between body and the top surface wall of outer case, also have interval between the right side wall of the internal box and outer case；The interior case
The front wall of body and bio-safety sealed door is set respectively on wall below；The top of the internal box is equipped with plenum chamber, institute
It states plenum chamber and outer case and shares top surface wall, left side wall, front wall and wall below；The width of the plenum chamber is less than
The width of the internal box；Set fresh air motor-driven valve, babinet are interior fresh air is set on the top surface wall of the plenum chamber, outside babinet
Wind turbine；The wall that the plenum chamber is contacted with internal box is arranged to homogenizing plate, and high efficiency particulate air filter is set above the homogenizing plate；Institute
It states and cycling air-valve is provided on the right side wall of plenum chamber；Air draft electricity is set on the top surface wall of the outer case, outside babinet
Exhaust fan and ozone machine are set in dynamic valve, babinet；The air draft motor-driven valve, exhaust fan and ozone machine are outside plenum chamber；Institute
The right side wall bottom for stating internal box sets return air inlet；Ozone transmitter, and institute are set on the top surface wall of the internal box
Ozone transmitter connection PLC control system is stated, the PLC control system is between gas lock in switch board；Between the gas lock
In switch board, H is set under PLC control system2O2The installation site of generator, passes through H2O2The setting of generator, further
The H generated using generator2O2Carry out disinfection sterilizing；The opening of fresh air motor-driven valve is towards wall behind outer case；Air draft motor-driven valve
Opening towards outer case front wall.
2. between the sterile gas lock of the stream of people/logistics according to claim 1, it is characterised in that set on the bio-safety sealed door
The magnetic key operated lock with feedback is put, the magnetic key operated lock is equipped with Double-door mutual-locking system, and the Double-door mutual-locking system is controlled with the PLC
System connects.
3. between the sterile gas lock of the stream of people/logistics according to claim 2, it is characterised in that set on the bio-safety sealed door
There are observation window and door open button.
4. between the sterile gas lock of the stream of people/logistics according to claim 1, it is characterised in that the PLC control system and operation
Panel connects, and the operation panel is mounted on the front wall of internal box, and operation panel Shang You human-computer interactions circle
Face.
5. between the sterile gas lock of the stream of people/logistics according to claim 1, it is characterised in that on the outside wall of the outer case
Be separately provided on the side wall body of internal box detection pressure difference signal differential pressure pickup, the differential pressure pickup with it is described
PLC control system connects.
6. between the sterile gas lock of the stream of people/logistics according to claim 1, it is characterised in that the width and outer container of the internal box
The ratio of the width of body is 8~9：10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379717.0A CN105909000B (en) | 2016-05-31 | 2016-05-31 | Between the sterile gas lock of the stream of people/logistics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379717.0A CN105909000B (en) | 2016-05-31 | 2016-05-31 | Between the sterile gas lock of the stream of people/logistics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105909000A CN105909000A (en) | 2016-08-31 |
| CN105909000B true CN105909000B (en) | 2018-06-05 |
Family
ID=56742894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610379717.0A Active CN105909000B (en) | 2016-05-31 | 2016-05-31 | Between the sterile gas lock of the stream of people/logistics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105909000B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965167A (en) * | 2017-12-20 | 2018-04-27 | 北京臻惠康生物科技有限公司 | Cell preparation laboratory design scheme |
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|---|---|---|---|---|
| CN107157376A (en) * | 2017-07-04 | 2017-09-15 | 上海朗脉洁净技术股份有限公司 | A kind of integrated form forces shower bath |
| CN108394662B (en) * | 2018-04-16 | 2024-04-16 | 江苏大学 | Kitchen garbage collecting box capable of deodorizing intelligently |
| CN111485739A (en) * | 2020-04-15 | 2020-08-04 | 江苏超净电子系统工程有限公司 | Cleaning level crossing protection device installed in modularized mode |
| CN111912848A (en) * | 2020-08-13 | 2020-11-10 | 蚌埠中光电科技有限公司 | Artificial reinspection device for high-generation large-size glass substrate |
| CN113701328B (en) * | 2021-09-27 | 2022-11-01 | 哈尔滨交研交通工程有限责任公司 | Temperature intelligent control system of highway intelligence toll booth |
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| US6869457B2 (en) * | 2000-11-08 | 2005-03-22 | Sharp Kabushiki Kaisha | Clean room for semiconductor device |
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| CN103266787A (en) * | 2013-05-24 | 2013-08-28 | 中国电子系统工程第二建设有限公司 | Air lock chamber |
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| CN205777680U (en) * | 2016-05-31 | 2016-12-07 | 四川川净洁净技术股份有限公司 | Between the aseptic gas lock of artificial abortion/logistics |
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2016
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|---|---|---|---|---|
| US6869457B2 (en) * | 2000-11-08 | 2005-03-22 | Sharp Kabushiki Kaisha | Clean room for semiconductor device |
| CN201778506U (en) * | 2010-09-03 | 2011-03-30 | 上海风神环境设备工程有限公司 | Equipment wall type clean operation unit |
| CN202578041U (en) * | 2012-05-04 | 2012-12-05 | 昆山协多利金属有限公司 | Negative pressure weighing room |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105909000A (en) | 2016-08-31 |
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Denomination of invention: Sterile airlock room for people / Logistics Effective date of registration: 20200911 Granted publication date: 20180605 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: SICHUAN CHUANJING CLEAN TECHNOLOGY HOLDING Co.,Ltd. Registration number: Y2020980005983 |
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Denomination of invention: People flow/logistics sterile air lock room Effective date of registration: 20221024 Granted publication date: 20180605 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: SICHUAN CHUANJING CLEAN TECHNOLOGY HOLDING CO.,LTD. Registration number: Y2022980019493 |
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Denomination of invention: Aseptic air lock room for pedestrian flow/logistics Granted publication date: 20180605 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: SICHUAN CHUANJING CLEAN TECHNOLOGY HOLDING CO.,LTD. Registration number: Y2024980001958 |
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