CN107917824A - A kind of low pressure in minienvironment cabin adjusts the method for sampling and device - Google Patents
A kind of low pressure in minienvironment cabin adjusts the method for sampling and device Download PDFInfo
- Publication number
- CN107917824A CN107917824A CN201711003011.5A CN201711003011A CN107917824A CN 107917824 A CN107917824 A CN 107917824A CN 201711003011 A CN201711003011 A CN 201711003011A CN 107917824 A CN107917824 A CN 107917824A
- Authority
- CN
- China
- Prior art keywords
- environmental chamber
- sampling
- cabin
- valve
- pressure
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A kind of low pressure the present invention relates to minienvironment cabin adjusts the method for sampling and device；Dry air passes through air inlet into humidity in control cabinet in environmental chamber with air mixing after humidifying pot humidifies is partly into；Water bath with thermostatic control is with water pipe in environmental chamber interlayer body with being connected, temperature in adjusting cabin；The humiture situation in Temperature Humidity Sensor display module on environmental chamber；Vacuumized by the vacuum pump connected with environmental chamber, according to pressure sensor data, adjust the needle-valve being connected with vacuum pump, realize the pressure control in cabin；The ball valve connected by sampling on gas outlet, realizes that the absorption to the gas in cabin samples using atmosphere sampling instrument and bubble absorption bottle.The present invention is suitable for common minienvironment cabin, does not have particular/special requirement to device, it is only necessary to vacuum pump, pressure sensor and regulating valve are added on device, therefore suitable for promoting and applying.The present invention stably can sample the gas in environmental chamber, avoid the situation of absorbing liquid suck-back produced by low pressure in cabin.
Description
Technical field
The invention belongs to the detection field of the gaseous chemical pollutant burst size of indoor building material, and in particular to one kind is adjusted
Save the method for sampling and device under the low-pressure state and lower pressure of environmental chamber.
Background technology
Due to the raising of quality of the life, the construction material of various synthesis is widely used in living and the indoor environment such as handle official business
Beautifying and decorating.And various polymer, organic solvent and auxiliary agent have been used in the manufacturing process of construction material, in use
Various organic pollutions are dispersed into air, so that room air pollution becomes after " coal-burning " pollution and " fuel combustion type " pollution
The third-largest air pollution type afterwards.It is each in indoor environment and most of the time of the people in one day is all spent indoors
Kind of chemical pollutant has human body a variety of adverse effects, such as the discomfort of eye, nose and throat, the disease of respiratory system, even
It may cause cancer.
In order to control pollutant from source, indoor environment is protected, the environmental chamber that can simulate indoor environment be used to detect
The gaseous chemical pollutant burst size of various construction materials and article.Usually used environmental chamber mainly comprising stainless steel nacelle,
Temperature control system, air exchange system and miscellaneous part.Each height above sea level in the whole nation can be simulated using the environmental chamber that can adjust low pressure
The environment under low pressure of pressure environment from different places, such as Tibet highlands.Construction material was used Different Altitude Regions
Gaseous chemical pollutant release conditions in journey, the environmental chamber that can be used can adjust low pressure are conveniently and efficiently simulated, detected.
Only a small number of environmental chambers can adjust pressure state at present, but its is complicated, and corresponding cost is higher.
The content of the invention
It is an object of the invention to invent the method for sampling under a kind of adjusting ambient cabin low-pressure state and lower pressure, utilize
The devices such as vacuum pump, pressure sensor and regulating valve, easy can rapidly adjust the pressure in environmental chamber, while utilize air
Sampling instrument and regulating valve can stably carry out the collection of gaseous sample.
Technical scheme is as follows:
A kind of low pressure in minienvironment cabin adjusts the method for sampling, and dry air is mixed with air after humidifying pot humidifies is partly into
Close and pass through air inlet into humidity in control cabinet in environmental chamber；Water bath with thermostatic control is adjusted with water pipe in environmental chamber interlayer body with being connected
Temperature in cabin；The humiture situation in Temperature Humidity Sensor display module on environmental chamber；Pass through the vacuum pump connected with environmental chamber
Vacuumize, according to pressure sensor data, adjust the needle-valve being connected with vacuum pump, realize the pressure control in cabin；Pass through sampling
The ball valve connected on gas outlet, realizes that the absorption to the gas in cabin samples using atmosphere sampling instrument and bubble absorption bottle.
5-40 DEG C of temperature in the environmental chamber.Humidity 5-95% in the environmental chamber.Ventilation speed in the environmental chamber
Rate 0.5-2/h.Pressure 60-101kPa in the environmental chamber.
Realize that a kind of low pressure in minienvironment cabin of the method for the present invention adjusts sampling apparatus；Pressure is connected in environment nacelle
Force control system, humidity control system, temperature control system and sampling system；The pressure sensor 8 of control pressurer system stretches into
In environmental chamber 1, sequentially connected needle-valve 9 and vacuum pump 10 on environment nacelle gas outlet 19；Humidity control system includes dry air
Gas cylinder 2 and its latter linked mass flowmenter 3, triple valve 4, suspended body flowmeter 5, humidifying pot 6 and needle-valve 7, triple valve 4 go out gas circuit
One end connects suspended body flowmeter 5, stretches into humidifying pot 6, and gas circuit other end connection needle-valve 7 and the outlet pipe of humidifying pot converge, lead to
Environment nacelle upper air mouth 18 is crossed to enter in environmental chamber 1；Temperature control system includes stretching into the Temperature Humidity Sensor in environmental chamber
12 and the water bath with thermostatic control 16 that is connected with environmental chamber interlayer inner conduit 17；Sampling system is to up-sample gas outlet 20 by environment nacelle
The ball valve 13 of upper connection and sequentially connected sampling pipe 14 and atmosphere sampling instrument 15 thereafter；Agitation fan is set in environmental chamber body
11。
In order to realize the simulation to environment of high-altitude area, a kind of adjusting ambient cabin low-pressure state and lower pressure have been invented
Under the method for sampling, including step：
(1) air exchange system and temperature and humidity control system, 5-40 DEG C of the temperature of requirement of experiment to be achieved, humidity 5-95% are opened
During with air charge rate 0.5-2/h, construction material sample to be detected is put into environmental chamber；
(2) environmental chamber is sealed, opens vacuum pump, observe the registration of pressure sensor, treat in cabin pressure close to mesh
After marking pressure 60-101kPa, the aperture of metering pin valve, makes pressure stability in desired value；
(3) the bubble absorption bottle equipped with absorbing liquid is connected on the thief hatch of atmosphere sampling instrument and environmental chamber, opened big
Gas sampling instrument, flow are more than target flow, in bottle to be absorbed during slow bubbling, open the ball valve on environmental chamber thief hatch, at the same time
The flow of atmosphere sampling instrument is adjusted to target flow, is sampled, closes ball valve after sampling rapidly；Or adsorption material will be housed
The sampling pipe of material is linked among atmosphere sampling instrument, opens atmosphere sampling instrument, and flow is more than target flow, flow indication to be sampled
During close to 0, the ball valve on environmental chamber thief hatch is opened, while adjusts the flow of atmosphere sampling instrument to target flow, is sampled,
Ball valve is closed after sampling rapidly.
Wherein, for the construction material type described in step 1 without particular/special requirement, environmental chamber is general general minienvironment cabin
(5-50L)。
Wherein, the vacuum pump type described in step 2 matches without particular/special requirement, needle-valve model with environmental chamber pipeline caliber.
Wherein, step 3 can be using spectrophotometer or the gas-chromatography with thermal desorption instrument by the gaseous sample collected
TD-GC is tested, and can obtain the burst size data of gaseous chemical pollutant in construction material.
Compared to the prior art the present invention, has obvious technical characterstic and beneficial effect.According to above technical scheme, sheet
Invention has the following advantages：
1st, the present invention is suitable for common minienvironment cabin, does not have particular/special requirement to device, it is only necessary to added on device
Vacuum pump, pressure sensor and regulating valve, therefore suitable for promoting and applying.
2nd, the present invention can pressure in simple, convenient and rapid ground adjusting ambient cabin, and pressure can in environmental chamber in detection process
Maintain to stablize, fluctuation is less than 0.5kPa.
3rd, the present invention stably can sample the gas in environmental chamber, avoid the absorption produced by low pressure in cabin
The situation of liquid suck-back.
Brief description of the drawings
Fig. 1 is pressure control and the sampling system structure chart in the minienvironment cabin in the present invention；
Wherein：1- minienvironment nacelles；2- air gas cylinders；3- mass flowmenters；4- triple valves；5- suspended body flowmeters；6-
Humidifying pot；7,9- needle-valves；8- pressure sensors；10- vacuum pumps；11- agitation fans；12- Temperature Humidity Sensors；13- ball valves；
14- bubble absorption bottles；15- atmosphere sampling instruments；16- waters bath with thermostatic control；17- water pipes；18- air inlets；19- gas outlets；20- is sampled out
Gas port；The direction of arrow represents airflow direction.
Formaldehyde emission situation in coating when Fig. 2 is 70kPa；
Formaldehyde emission situation in coating when Fig. 3 is 90kPa.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, now come furtherly with following embodiments
The bright present invention, but it is not limited to the scope of the present invention.The means used in embodiment, unless otherwise instructed, using ability
Domain conventional means.
Method proposed by the present invention is mainly included using the environment cabin system shown in Fig. 1：Control pressurer system, humidity control
System, temperature control system, environment nacelle and sampling system processed.The pressure that control pressurer system includes stretching into environmental chamber 1 passes
Sequentially connected needle-valve 9 and vacuum pump 10 on sensor 8, gas outlet 19；Humidity control system includes dry air gas cylinder 2 with connecting thereafter
Mass flowmenter 3, triple valve 4, suspended body flowmeter 5, humidifying pot 6 and the needle-valve 7 connect, connection float in gas circuit one end after triple valve 4
Flowmeter 5, stretches into humidifying pot 6, and gas circuit other end connection needle-valve 7 and the outlet pipe of humidifying pot converge, and then pass through air inlet
18 enter in environmental chamber 1；Temperature control system include stretch into the Temperature Humidity Sensor 12 in environmental chamber and with environmental chamber interlayer
The connected water bath with thermostatic control 16 of water pipe 17；Environment nacelle includes the agitation fan 11 that environmental chamber 1 is internally located at it under lid.Sampling system
System includes sampling the ball valve 13 and sequentially connected sampling pipe 14 and atmosphere sampling instrument 15 thereafter connected on gas outlet 20.
Dry air from gas cylinder 2 flow out rear portion enter humidifying pot 6, mixed after humidification with another part dry air by into
Humidity in control cabinet in the entrance environmental chamber 1 of gas port 18.Water bath with thermostatic control with water pipe 17 is with being connected in environmental chamber interlayer body, in adjusting cabin
Temperature.The humiture situation in 12 display module of Temperature Humidity Sensor that environmental chamber covers.Pass through the vacuum pump connected with environmental chamber 1
10 vacuumize, 8 registration of pressure sensor covered according to environmental chamber, adjust the needle-valve 9 being connected with vacuum pump, realize the pressure in cabin
Power controls.By the ball valve 13 connected on gas outlet 20, realized using atmosphere sampling instrument 15 and bubble absorption bottle 14 in cabin
The absorption sampling of gas.
Embodiment 1：
Pressure control and the method for sampling the present invention provides a kind of minienvironment cabin as shown in Figure 1, it is main to include very
Empty pump, pressure sensor, needle-valve, atmosphere sampling instrument and ball valve.Construction material to be measured is put into the minienvironment for regulating humiture
Behind cabin, by vacuum pump and needle-valve, the pressure in minienvironment cabin is adjusted according to the registration of pressure sensor, is released in construction material
The gaseous chemical pollutant of releasing is gathered into bubble absorption bottle or sampling pipe by ball valve and atmosphere sampling instrument.
Since the method for the invention is from the limitation of construction material type, therefore this example is released with formaldehyde in polyurethane coating
Embodiment explanation is carried out exemplified by high-volume detecting.
The present embodiment employs the minienvironment cabin system shown in Fig. 1.The present embodiment is simulation Lhasa area environment under low pressure
Experiment, set temperature be 23 DEG C, humidity 60%, air charge rate 1/h, pressure 70kPa.Specific implementation step is as follows：
(1) air gas cylinder is opened, adjusting mass flowmenter makes air charge rate reach 1/h；
(2) water bath with thermostatic control is opened, set temperature is 23 DEG C, adjusts needle-valve before humidifying pot, humidity is reached 60%；
(3) coating is allocated according to construction ratio, using wool brush by deployed coating be coated on 15cm ×
On the stainless steel plate of 15cm, spreading area is 14cm × 14cm, coating quality 8.5g；
(4) stainless steel plate for scribbling coating is put into environmental chamber simultaneously sealed environment cabin；
(5) vacuum pump is opened, observation treats that temperature rises to design temperature, observes the registration of pressure sensor, treat pressure in cabin
During close to 70kPa, the aperture of metering pin valve, reduces rate of air sucked in required, makes pressure stability in desired value；
(6) when sampling, the bubble absorption bottle equipped with absorbing liquid is connected on the thief hatch of atmosphere sampling instrument and environmental chamber,
Atmosphere sampling instrument is opened, is slightly larger than target flow (0.5L/min) by flow set, in bottle to be absorbed during slow bubbling, opens
Ball valve on environmental chamber thief hatch, while the flow for adjusting atmosphere sampling instrument is sampled to 0.5L/min；
Under preferably, the release conditions of formaldehyde are as shown in Figure 2 in sample coating：
Embodiment 2：
System and raw material used in the present embodiment is with embodiment 1, and it will not go into details.
The present embodiment employs the minienvironment cabin system shown in Fig. 1.The present embodiment is simulation Wulumuqi Area low pressure
The experiment of environment, set temperature are 23 DEG C, humidity 60%, air charge rate 1/h, pressure 90kPa.Specific implementation step is such as
Under：
(1) air gas cylinder is opened, adjusting mass flowmenter makes air charge rate reach 1/h；
(2) water bath with thermostatic control is opened, set temperature is 23 DEG C, adjusts needle-valve before humidifying pot, humidity is reached 65%；
(3) coating is allocated according to construction ratio, using wool brush by deployed coating be coated on 15cm ×
On the stainless steel plate of 15cm, spreading area is 14cm × 14cm, coating quality 8.5g；
(4) stainless steel plate for scribbling coating is put into environmental chamber simultaneously sealed environment cabin；
(5) vacuum pump is opened, observation treats that temperature rises to design temperature, observes the registration of pressure sensor, treat pressure in cabin
During close to 90kPa, the aperture of metering pin valve, reduces rate of air sucked in required, makes pressure stability in desired value；
(6) when sampling, the bubble absorption bottle equipped with absorbing liquid is connected on the thief hatch of atmosphere sampling instrument and environmental chamber,
Atmosphere sampling instrument is opened, is slightly larger than target flow (0.5L/min) by flow set, in bottle to be absorbed during slow bubbling, opens
Ball valve on environmental chamber thief hatch, while the flow for adjusting atmosphere sampling instrument is sampled to 0.5L/min；
Under preferably, the release conditions of formaldehyde are as shown in Figure 3 in sample coating：
A kind of low pressure in minienvironment cabin that the present invention is disclosed and proposed adjusts the method for sampling and device, people in the art
Member can be by using for reference present disclosure, and the appropriate links such as condition route that change are realized, although the method and technology of preparing of the present invention are
It is described by preferred embodiment, related technical personnel can substantially not depart from present invention, in spirit and scope
Methods and techniques described herein route is modified or reconfigured, to realize final technology of preparing.Especially need to refer to
Go out, all similar replacements and change are apparent to those skilled in the art, they are considered as wrapping
Include in spirit of the invention, scope and content.
Claims (6)
1. a kind of low pressure in minienvironment cabin adjusts the method for sampling, it is characterized in that dry air and after being partly into humidifying pot humidification
Air mixing passes through air inlet into humidity in control cabinet in environmental chamber；Water bath with thermostatic control and water pipe and phase in environmental chamber interlayer body
Even, temperature in adjusting cabin；The humiture situation in Temperature Humidity Sensor display module on environmental chamber；Pass through what is connected with environmental chamber
Vacuum pump vacuumizes, and according to pressure sensor data, adjusts the needle-valve being connected with vacuum pump, realizes the pressure control in cabin；It is logical
The ball valve connected on over-sampling gas outlet, realizes that the absorption to the gas in cabin is adopted using atmosphere sampling instrument and bubble absorption bottle
Sample.
2. the method as described in claim 1, it is characterized in that 5-40 DEG C of temperature in environmental chamber.
3. the method as described in claim 1, it is characterized in that humidity 5-95% in environmental chamber.
4. the method as described in claim 1, it is characterized in that air charge rate 0.5-2/h in environmental chamber.
5. the method as described in claim 1, it is characterized in that pressure 60-101kPa in environmental chamber.
6. realize that a kind of low pressure in minienvironment cabin of claim 1 adjusts sampling apparatus；It is characterized in that connect in environment nacelle
Connect control pressurer system, humidity control system, temperature control system and sampling system；The pressure sensor of control pressurer system
(8) stretch into environmental chamber (1), sequentially connected needle-valve (9) and vacuum pump (10) on environment nacelle gas outlet (19)；Humid control
System includes dry air gas cylinder (2) and its latter linked mass flowmenter (3), triple valve (4), suspended body flowmeter (5), humidifying pot
(6) and needle-valve (7), triple valve (4) go out gas circuit one end connection suspended body flowmeter (5), stretch into humidifying pot (6), the gas circuit other end connects
Connect needle-valve (7) and the outlet pipe of humidifying pot converges, entered by environment nacelle upper air mouth (18) in environmental chamber (1)；Temperature
Control system includes the Temperature Humidity Sensor (12) stretched into environmental chamber and the constant temperature being connected with environmental chamber interlayer inner conduit (17)
Water-bath (16)；Sampling system is with being sequentially connected thereafter by the ball valve (13) connected on environment nacelle up-sampling gas outlet (20)
Sampling pipe (14) and atmosphere sampling instrument (15)；Agitation fan (11) is set in environmental chamber body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003011.5A CN107917824A (en) | 2017-10-24 | 2017-10-24 | A kind of low pressure in minienvironment cabin adjusts the method for sampling and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003011.5A CN107917824A (en) | 2017-10-24 | 2017-10-24 | A kind of low pressure in minienvironment cabin adjusts the method for sampling and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107917824A true CN107917824A (en) | 2018-04-17 |
Family
ID=61895702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711003011.5A Pending CN107917824A (en) | 2017-10-24 | 2017-10-24 | A kind of low pressure in minienvironment cabin adjusts the method for sampling and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107917824A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387411A (en) * | 2018-05-24 | 2018-08-10 | 夏文斌 | A kind of gas sampling assembly for acquiring car air conditioner refrigerant |
| CN108872033A (en) * | 2018-05-24 | 2018-11-23 | 香港理工大学深圳研究院 | The heterogeneous reaction activity measurement device and method of gaseous pollutant in atmospheric environment |
| CN109709454A (en) * | 2018-12-28 | 2019-05-03 | 湖南大学 | High-pressure test device, system and method |
| CN110442157A (en) * | 2018-05-03 | 2019-11-12 | 吉林壹舟医疗科技有限公司 | Compress control method in hypobaric chamber and cabin |
| CN110442158A (en) * | 2018-05-03 | 2019-11-12 | 吉林壹舟医疗科技有限公司 | Pressure declines control method in hypobaric chamber and cabin |
| CN112269415A (en) * | 2020-09-30 | 2021-01-26 | 深圳永晟中业达健康科技有限公司 | Low-pressure cabin control method and device |
| CN114720637A (en) * | 2022-03-30 | 2022-07-08 | 北京理工大学 | Temperature and humidity controllable multifunctional environment cabin for indoor vehicle interior material release determination |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050235763A1 (en) * | 2004-04-21 | 2005-10-27 | Blewett John J | Dust testing facility for motor vehicles |
| CN101644666A (en) * | 2009-09-04 | 2010-02-10 | 清华大学 | Experimental device for measuring formaldehyde adsorption property of adsorbent and measuring method thereof |
| CN101832887A (en) * | 2010-05-19 | 2010-09-15 | 南昌大学 | Small-sized environmental test chamber for pollutant release researches |
| CN202693567U (en) * | 2012-07-19 | 2013-01-23 | 广东省建筑科学研究院 | Environmental test chamber for detecting harmful substances in indoor environment decoration materials |
| CN103154696A (en) * | 2010-10-18 | 2013-06-12 | 东莞市升微机电设备科技有限公司 | Low pressure and high-low temperature test box capable of controlling humidity |
| CN105206158A (en) * | 2015-09-15 | 2015-12-30 | 东南大学 | South pole low-temperature and low-pressure environment simulation cabin |
| CN105784929A (en) * | 2016-02-29 | 2016-07-20 | 西安交通大学 | System for measuring emitting characteristic of building materials in indoor environment and environmental chamber of system |
| CN106093311A (en) * | 2016-08-08 | 2016-11-09 | 北京市产品质量监督检验院 | Abnormal smells from the patient, VOC and floating harmful substance test device |
-
2017
- 2017-10-24 CN CN201711003011.5A patent/CN107917824A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050235763A1 (en) * | 2004-04-21 | 2005-10-27 | Blewett John J | Dust testing facility for motor vehicles |
| CN101644666A (en) * | 2009-09-04 | 2010-02-10 | 清华大学 | Experimental device for measuring formaldehyde adsorption property of adsorbent and measuring method thereof |
| CN101832887A (en) * | 2010-05-19 | 2010-09-15 | 南昌大学 | Small-sized environmental test chamber for pollutant release researches |
| CN103154696A (en) * | 2010-10-18 | 2013-06-12 | 东莞市升微机电设备科技有限公司 | Low pressure and high-low temperature test box capable of controlling humidity |
| CN202693567U (en) * | 2012-07-19 | 2013-01-23 | 广东省建筑科学研究院 | Environmental test chamber for detecting harmful substances in indoor environment decoration materials |
| CN105206158A (en) * | 2015-09-15 | 2015-12-30 | 东南大学 | South pole low-temperature and low-pressure environment simulation cabin |
| CN105784929A (en) * | 2016-02-29 | 2016-07-20 | 西安交通大学 | System for measuring emitting characteristic of building materials in indoor environment and environmental chamber of system |
| CN106093311A (en) * | 2016-08-08 | 2016-11-09 | 北京市产品质量监督检验院 | Abnormal smells from the patient, VOC and floating harmful substance test device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110442157A (en) * | 2018-05-03 | 2019-11-12 | 吉林壹舟医疗科技有限公司 | Compress control method in hypobaric chamber and cabin |
| CN110442158A (en) * | 2018-05-03 | 2019-11-12 | 吉林壹舟医疗科技有限公司 | Pressure declines control method in hypobaric chamber and cabin |
| CN108387411A (en) * | 2018-05-24 | 2018-08-10 | 夏文斌 | A kind of gas sampling assembly for acquiring car air conditioner refrigerant |
| CN108872033A (en) * | 2018-05-24 | 2018-11-23 | 香港理工大学深圳研究院 | The heterogeneous reaction activity measurement device and method of gaseous pollutant in atmospheric environment |
| CN109709454A (en) * | 2018-12-28 | 2019-05-03 | 湖南大学 | High-pressure test device, system and method |
| CN112269415A (en) * | 2020-09-30 | 2021-01-26 | 深圳永晟中业达健康科技有限公司 | Low-pressure cabin control method and device |
| CN114720637A (en) * | 2022-03-30 | 2022-07-08 | 北京理工大学 | Temperature and humidity controllable multifunctional environment cabin for indoor vehicle interior material release determination |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107917824A (en) | A kind of low pressure in minienvironment cabin adjusts the method for sampling and device | |
| CN101832887B (en) | Small-sized environmental test chamber for pollutant release researches | |
| CN202693567U (en) | Environmental test chamber for detecting harmful substances in indoor environment decoration materials | |
| AU2020103591A4 (en) | Low-pressure-adjusting sampling method and apparatus of miniature environment cabin | |
| CN108786938B (en) | Haze particle formation simulator | |
| CN208283033U (en) | A kind of experimental study device based on downburst wind-tunnel | |
| CN104764683B (en) | Building exterior window particulate matter permeability testboard | |
| CN106288247A (en) | Walk-in type car load VOC and aldoketones sampling environmental chamber | |
| CN106940365A (en) | A kind of indoor soil incubation device for integrating ventilation culture with gas collecting and application | |
| CN107842916A (en) | Air conditioner humidification system | |
| CN208447842U (en) | A kind of breath exposure device and breath exposure system for respiratory administration | |
| CN201780265U (en) | Small-size environmental test chamber for pollutant release research | |
| CN104849170B (en) | The open type absorption property test system and its method of a kind of solar adsorption water making pipe | |
| CN107167564B (en) | A kind of interior microcosm ecological simulation experimental provision and ecological simulation experimental method | |
| CN207133092U (en) | Natural haze gas collection concentration experimental provision | |
| CN103412097A (en) | Device and method for detecting emissions of VOC (Volatile Organic Compounds) and formaldehyde | |
| CN207528702U (en) | Closed intelligence smokes gas system | |
| CN107389514A (en) | A kind of atmospheric haze collection analysis release device | |
| CN202735324U (en) | Readable detection device for furniture contaminant | |
| CN102101062B (en) | Aerosol microenvironment enclosed cabin for aerosol experiment | |
| CN206974857U (en) | The permeability test research device of light source under a kind of haze environment | |
| CN201949878U (en) | Constant hypoxic environment regulation and control system for laboratory | |
| CN207238743U (en) | Double membrane structure processing system for repairing organic polluted soil | |
| CN201912942U (en) | Aerosol microenvironment sealed cabin for aerosol experiment | |
| CN206001611U (en) | A kind of bathroom air cleaner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180417 |