CN105717260B - A kind of method and system for measuring fresh air volume in space to be detected - Google Patents
A kind of method and system for measuring fresh air volume in space to be detected Download PDFInfo
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- CN105717260B CN105717260B CN201610174114.7A CN201610174114A CN105717260B CN 105717260 B CN105717260 B CN 105717260B CN 201610174114 A CN201610174114 A CN 201610174114A CN 105717260 B CN105717260 B CN 105717260B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 74
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 239000013618 particulate matter Substances 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims description 38
- 238000000746 purification Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 239000011163 secondary particle Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000003695 hair diameter Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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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
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
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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
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0068—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a computer specifically programmed
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Abstract
The invention discloses a kind of method and system for measuring fresh air volume in space to be detected, this method includes：Obtain the volume data V in space to be detected；Detect and persistently record the particle concentration data C outside space to be detectedout, detect and persistently record the particle concentration data C in space to be detected；According to the particle concentration data C outside volume data V, space to be detectedoutAnd the particle concentration data C in space to be detected carries out calculating and handles to obtain fresh air volume data Q.The present invention measures the method and device of fresh air volume in space to be detected, and by directly detecting particulate matter inside and outside space to be detected, then by fresh air volume in space to be detected is calculated, simplification detection method, makes detection process more convenient.
Description
Technical field
The present invention relates to fresh air volume detection technique field, more particularly to a kind of method for measuring fresh air volume in space to be detected
And system.
Background technology
Fresh air volume is the important indicator for evaluating indoor air quality, and certain fresh air volume is to being chronically at indoor people to pass
It is important, this is because people spends the most of the time indoors, the indoor environment of fresh air volume deficiency is chronically to health meeting
Cause very big harm.
Traditional national standard method uses trace gas concentration damped method.Appropriate search gas is passed through in interior to be measured, due to room
Inside and outside air exchange, the concentration of search gas exponentially decay, and according to concentration with the value of the change of time, calculate interior
Fresh air volume.
Traditionally national standard method will be passed through the search gas such as carbon dioxide toward interior, be brought not in resident's family measurement
Just.
The content of the invention
It is an object of the invention to provide provide a kind of method and system for measuring fresh air volume in space to be detected, Neng Goujian
Change detection method, make detection process more convenient.
In order to solve the above technical problems, the present invention provides a kind of method for measuring fresh air volume in space to be detected, its feature
It is, including：
Obtain the volume data V in space to be detected；Detect and persistently record the particle concentration data outside space to be detected
Cout, detect and persistently record the particle concentration data C in space to be detected；According to outside volume data V, space to be detected
Particle concentration data CoutAnd the particle concentration data C in space to be detected carries out calculating and handles to obtain fresh air volume data
Q。
Wherein, according to the particle concentration data C outside volume data V, space to be detectedoutAnd in space to be detected
Particle concentration data C further comprise before the step of calculating handles to obtain fresh air volume data Q：
The ventilating opening in space to be detected is opened, so that the particle concentration data C in space to be detected and space to be detected
Outer particle concentration data CoutReach once balance state；The ventilating opening in space to be detected is closed, so that in space to be detected
Particle concentration data C and space to be detected outside particle concentration data CoutReach secondary balancing state；
According to the particle concentration data C outside volume data V, space to be detectedoutAnd the particulate matter in space to be detected
Concentration data C carries out calculating and handles to include the step of obtaining fresh air volume data Q：
During using secondary balancing state is changed into from once balance state or reach the volume of secondary balancing state
Particle concentration data C outside data V, space to be detectedoutAnd the particle concentration data C in space to be detected is counted
Calculation handles to obtain fresh air volume data Q.
Wherein, according to particle concentration data C outside volume data V, space to be detectedoutAnd in space to be detected
Grain thing concentration data C is carried out in the step of calculating handles to obtain fresh air volume data Q：
Pass through formulaCalculating handles to obtain fresh air volume data Q, wherein QcFor constant.
Wherein, method further includes：To purify air quantity as QcSpeed purify particulate matter in space to be detected.
Wherein, to purify air quantity as QcSpeed the step of purifying the particulate matter in space to be detected in：
In spatial volume data V≤60m to be detected3When, purify air quantity≤200m3/h；In spatial volume data V to be detected
＞ 60m3When, purify air quantity ＞ 200m3/h。
Wherein, during using secondary balancing state is changed into from once balance state or secondary balancing state is reached
Volume data V, the particle concentration data C outside space to be detectedoutAnd the particle concentration data C in space to be detected
Carry out among the step of calculating handles to obtain fresh air volume data Q：
It is chosen at particulate matter inside and outside space to be detected and reaches the volume data V of secondary balancing state, outside space to be detected
Grain thing concentration data CoutAnd the average value of the real-time fresh air volume data corresponding to space endoparticle thing concentration data C to be detected
For fresh air volume data Q.
To solve the above problems, present invention also offers a kind of device for measuring fresh air volume in space to be detected, its feature
It is, including：
First dust investigating, the second dust investigating and detected with the first dust investigating and the second dust
The processor that device is connected by data cable；
First dust investigating is positioned over outside space to be detected, for detecting and persistently recording particle outside space to be detected
Thing concentration data Cout, and when stopping detection and record by particle concentration data C outside space to be detectedoutIt is sent to processing
Device；
Second dust investigating is positioned in space to be detected, for detecting and persistently recording space endoparticle to be detected
Thing concentration data C, and space endoparticle thing concentration data C to be detected is sent to processor when stopping detection and record；
Processor is used to receive particle concentration data C outside space to be detectedout, endoparticle thing concentration numbers in space to be detected
According to the C and spatial volume data V to be detected measured, and according to particle concentration data C outside space to be detectedout, sky to be detected
Between the endoparticle thing concentration data C and spatial volume data V to be detected that measures carry out calculating and handle to obtain fresh air volume data Q.
Wherein, further include：Air purifier, for after measurement starts to purify air quantity as QcSpeed purification it is to be detected
Particulate matter in space.
Wherein, in spatial volume data V≤60m to be detected3When, air purifier purification air quantity≤200m3/h；To be checked
Survey spatial volume data V ＞ 60m3When, air purifier purification air quantity ＞ 200m3/h。
Wherein, the second dust investigating is located at space to be detected center, and the first dust investigating and the second dust are examined
Device is surveyed highly to be consistent.
Wherein, processor passes throughFormula is simultaneously dense according to particulate matter outside volume data V, space to be detected
Degrees of data Cout, endoparticle thing concentration data C in space to be detected and purification air quantity QcCalculating is carried out to handle to obtain fresh air volume data
Q, wherein QCFor constant.
Present invention also offers a kind of system for measuring fresh air volume in space to be detected, it is characterised in that including：
First dust investigating, the second dust investigating and with first dust investigating and described second
The processor that dust investigating is connected；
First dust investigating is positioned over outside space to be detected, for detecting and persistently recording particle outside space to be detected
Thing concentration data Cout, and when stopping detection and record by particle concentration data C outside space to be detectedoutIt is sent to processing
Device；
Second dust investigating is positioned in space to be detected, for detecting and persistently recording space endoparticle to be detected
Thing concentration data C, and space endoparticle thing concentration data C to be detected is sent to processor when stopping detection and record；
Processor is used to receive particle concentration data C outside space to be detectedout, endoparticle thing concentration numbers in space to be detected
According to the C and spatial volume data V to be detected measured, and according to particle concentration data C outside space to be detectedout, sky to be detected
Between the endoparticle thing concentration data C and spatial volume data V to be detected that measures carry out calculating and handle to obtain fresh air volume data Q.
Wherein, further include：Air purifier, for after measurement starts to purify air quantity as QcSpeed purification it is to be detected
Particulate matter in space.
Wherein, in spatial volume data V≤60m to be detected3When, air purifier purification air quantity≤200m3/h；To be checked
Survey spatial volume data V ＞ 60m3When, air purifier purification air quantity ＞ 200m3/h。
Wherein, the second dust investigating is located at space to be detected center, and apart from 0.8~1.5m of bottom surface, the first dust
Detection device is highly consistent with the second dust investigating.
Wherein, processor passes throughFormula is simultaneously dense according to particulate matter outside volume data V, space to be detected
Degrees of data Cout, endoparticle thing concentration data C in space to be detected and purification air quantity QcCalculating is carried out to handle to obtain fresh air volume data
Q, wherein QCFor constant.
The beneficial effects of the invention are as follows：The situation of the prior art is different from, the present invention measures fresh air volume in space to be detected
Method and device, by directly detecting inside and outside space to be detected particulate matter and then by fresh air in space to be detected is calculated
Amount, simplification detection method, makes detection process more convenient.
Brief description of the drawings
Fig. 1 is the flow diagram that the present invention measures the method first embodiment of fresh air volume in space to be detected；
Fig. 2 is that the present invention is measured in space to be detected in the method first embodiment of fresh air volume, particle outside space to be detected
Thing concentration data CoutWith endoparticle thing concentration data C in space to be detected since first time balance with the variation tendency of time t
Schematic diagram；
Fig. 3 is the system first embodiment structure diagram that the present invention measures fresh air volume in space to be detected.
Embodiment
Further to illustrate the present invention technological means and its effect taken, below in conjunction with the embodiment of the present invention and
Its attached drawing is described in detail.
With reference to Fig. 1, Fig. 1 is the flow signal that the present invention measures the method first embodiment of fresh air volume in space to be detected
Figure, the method specifically comprise the following steps：
S100 obtains the volume data V in space to be detected；
Wherein, the volume data V in space to be detected is that the actual volume data in the space to be detected subtract what is be placed in one
The volume data of object (such as equipment, furniture, seat)；
S200 is detected and is persistently recorded the particle concentration data C outside space to be detectedout, detect and persistently record to be checked
Survey the particle concentration data C in space；
S600 is according to the particle concentration data C outside volume data V, space to be detectedoutAnd in space to be detected
Grain thing concentration data C carries out calculating and handles to obtain fresh air volume data Q.
Wherein, fresh air volume refers to, from the indoor fresh air of outdoor introducing, be different from indoor return air, China's national standard
GB/T18883-2002 provides that fresh air volume is no less than 60m3/ h people；Space to be detected includes Indoor environment, vehicle interior
Space and cabin inner space etc. have certain requirements fresh air volume place, do not do excessive limitation herein；Particulate matter refers to greatly
Solid or liquid particles shape material, the particulate matter currently attracted people's attention in gas are divided into two classes：PM2.5 (fine particle)
With PM10 (pellet), diameter is no more than 2.5 microns, is the 1/60 of human hair's diameter, and the latter is then thicker,
The particulate matter object detected in the present embodiment and other embodiment can be PM2.5 or PM10 or other particulate matter types, herein
Excessive limitation is not done.
Measuring in space to be detected in one embodiment of method of fresh air volume, by directly detecting inside and outside space to be detected
Grain thing concentration and by fresh air volume in space to be detected is calculated, it is not necessary to be passed through search gas (such as titanium dioxide to interior
Carbon etc.), the influence to indoor environment is reduced, simplification detection method, makes detection process more convenient.
Measured in the present invention in space to be detected in the method first embodiment of fresh air volume, S600 according to volume data V, treat
Detect the particle concentration data C outside spaceoutAnd the particle concentration data C in space to be detected carries out calculating and handles
Further comprise to before the step of fresh air volume data Q：
S210 opens the ventilating opening in space to be detected so that the particle concentration data C in space to be detected with it is to be detected
Particle concentration data C outside spaceoutReach once balance state；
S220 closes the ventilating opening in space to be detected so that the particle concentration data C in space to be detected with it is to be detected
Particle concentration data C outside spaceoutReach secondary balancing state；
Wherein, when the particle concentration stabilization inside and outside space to be detected is near certain numerical value, that is, think to have reached flat
Weighing apparatus state.
S600 is according to the particle concentration data C outside volume data V, space to be detectedoutAnd in space to be detected
Grain thing concentration data C carries out calculating and handles to include the step of obtaining fresh air volume data Q：
During using secondary balancing state is changed into from once balance state or reach the volume of secondary balancing state
Particle concentration data C outside data V, space to be detectedoutAnd the particle concentration data C in space to be detected is counted
Calculation handles to obtain fresh air volume data Q.
It is wherein optional, it is chosen at the volume data V, to be checked that particulate matter inside and outside space to be detected reaches secondary balancing state
Survey particle concentration data C outside spaceoutAnd the real-time fresh air volume number corresponding to space endoparticle thing concentration data C to be detected
According to average value be fresh air volume data Q.
Measured in the present invention in space to be detected in the method first embodiment of fresh air volume, can be to purify air quantity as Qc's
Speed purifies the particulate matter in space to be detected, purification air quantity QcSize further tune is done according to the size in space to be detected
Section, shortens the time of detection, can reach secondary balancing state faster.
Optionally, in spatial volume data V≤60m to be detected3When, purify air quantity≤200m3/h；In space body to be detected
Volume data V ＞ 60m3When, purify air quantity ＞ 200m3/h。
Measured in the present invention in space to be detected in the method first embodiment of fresh air volume, with reference to Fig. 2, Fig. 2 is the present invention
In the method first embodiment for measuring fresh air volume in space to be detected, particle concentration data C outside space to be detectedoutWith it is to be checked
Space endoparticle thing concentration data C is surveyed since balancing first time as the variation tendency schematic diagram of time t, wherein B area are
Reach the period of second of equilibrium state, pass through formulaCalculating handles to obtain fresh air volume data Q, wherein
Qc, can be according to the particle concentration data C outside one group of space to be detected corresponding to the B area period for constantoutAnd treat
Particle concentration data C in detection space obtains one group of real-time fresh air volume data, takes being averaged for the real-time fresh air volume data of the group
Value is fresh air volume data Q.
With reference to Fig. 3, Fig. 3 is the system first embodiment structure diagram that the present invention measures fresh air volume in space to be detected,
Including：
First dust investigating 11, the second dust investigating 12 and with the first dust investigating 11 and the second powder
The processor 13 that dust detection device 12 is connected；
Wherein, the first dust investigating 11 and the second dust investigating 12 can pass through cable network and processor phase
Connection, can also by radio connection (such as WiFi, bluetooth, mobile data network etc.), processor can be computer,
Mobile equipment (such as smart mobile phone, tablet computer, intelligent watch etc.), is not especially limited herein.
First dust investigating 11 is positioned over outside space 14 to be detected, for detecting and persistently recording space 14 to be detected
Outer particle concentration data Cout, and when stopping detection and record by the outer particle concentration data C in space 14 to be detectedoutSend
To processor 13；
Second dust investigating 12 is positioned in space 14 to be detected, for detecting and persistently recording space 14 to be detected
Endoparticle thing concentration data C, and stop detection and record when by be detected empty 14 between endoparticle thing concentration data C be sent to place
Manage device 13；
Processor 13 is used to receive the outer particle concentration data C in space 14 to be detectedout, 14 endoparticle thing of space to be detected
The concentration data C and 14 volume data V of space to be detected measured, and according to the outer particle concentration data in space 14 to be detected
Cout, 14 endoparticle thing concentration data C of space to be detected and the 14 volume data V of space to be detected that measures carry out calculating processing
Obtain fresh air volume data Q.
Measuring in space to be detected in the system first embodiment of fresh air volume, by using the first detection device and second
Detection device directly detects the particle concentration inside and outside space to be detected and by fresh air volume in space to be detected is calculated, no
Need to be passed through search gas (such as carbon dioxide etc.) to interior, reduce the influence to indoor environment, simplification detection method, makes
Detection process is more convenient.
In present invention measurement space to be detected in the system first embodiment of fresh air volume, air purifier 15 is further included,
For purifying air quantity Q after measurement startscSpeed purify particulate matter in space 14 to be detected, shorten detection when
Between, particle concentration inside and outside space 14 to be detected is reached equilibrium state faster.
Wherein, in 14 volume data V≤60m of space to be detected3When, air purifier 15 purifies air quantity≤200m3/h；
14 volume data V ＞ 60m of space to be detected3When, air purifier 15 purifies air quantity ＞ 200m3/h。
Optionally, in 14 volume data V≤60m of space to be detected3When, it is 198m that air purifier 15, which purifies air quantity,3/h；
In 14 volume data V ＞ 60m of space to be detected3When, it is 288m that air purifier 15, which purifies air quantity,3/h。
Wherein, the second dust investigating 12 is positioned at the center of space 14 to be detected, optionally apart from 0.8~1.5m of bottom surface；
First dust investigating 11 is consistent with 12 height of the second dust investigating.
Wherein, processor 13 passes throughFormula and according to volume data V, 14 outer particle of space to be detected
Thing concentration data Cout, 14 endoparticle thing concentration data C of space to be detected and purification air quantity QcCalculating is carried out to handle to obtain fresh air
Measure data Q, wherein QCFor constant, t is time variable.
The foregoing is merely embodiments of the present invention, are not intended to limit the scope of the invention, every to utilize this
The equivalent structure or equivalent flow shift that description of the invention and accompanying drawing content are made, it is relevant to be directly or indirectly used in other
Technical field, is included within the scope of the present invention.
Claims (7)
- A kind of 1. method for measuring fresh air volume in space to be detected, it is characterised in that including：Obtain the volume data V in the space to be detected；Detect and persistently record the particle concentration data C outside the space to be detectedout, detect and persistently record described to be checked Survey the particle concentration data C in space；According to the particle concentration data C outside the volume data V, the space to be detectedoutAnd in the space to be detected Particle concentration data C, pass through formulaCalculating is carried out to handle to obtain fresh air volume data Q,Wherein, the method further includes：To purify air quantity as QcSpeed purify particulate matter in the space to be detected.
- 2. the method for fresh air volume in measurement space to be detected according to claim 1, it is characterised in thatThe particle concentration data C according to outside the volume data V, the space to be detectedoutAnd the sky to be detected Interior particle concentration data C further comprise before the step of calculating handles to obtain fresh air volume data Q：The ventilating opening in the space to be detected is opened, so that the particle concentration data C in the space to be detected is treated with described Detect the particle concentration data C outside spaceoutReach once balance state；The ventilating opening in the space to be detected is closed, so that the particle concentration data C in the space to be detected is treated with described Detect the particle concentration data C outside spaceoutReach secondary balancing state；The particle concentration data C according to outside the volume data V, the space to be detectedoutAnd the sky to be detected Interior particle concentration data C carries out calculating and handles to include the step of obtaining fresh air volume data Q：During using the secondary balancing state is changed into from the once balance state or reach secondary balancing state Particle concentration data C outside the volume data V, the space to be detectedoutAnd the particulate matter in the space to be detected Concentration data C carries out calculating and handles to obtain fresh air volume data Q.
- 3. the method for fresh air volume in measurement space to be detected according to claim 1, it is characterised in thatDescribed to purify air quantity as QcSpeed the step of purifying the particulate matter in the space to be detected in：In the spatial volume data V≤60m to be detected3When, purify air quantity≤200m3/h；In the space body product to be detected According to V ＞ 60m3When, purify air quantity ＞ 200m3/h。
- 4. the method for fresh air volume in measurement space to be detected according to claim 2, it is characterised in thatDuring the utilization is changed into the secondary balancing state from the once balance state or reach described secondary Particle concentration data C outside the volume data V of equilibrium state, the space to be detectedoutAnd the space to be detected Interior particle concentration data C is carried out among the step of calculating handles to obtain fresh air volume data Q：Particulate matter inside and outside the space to be detected is chosen to reach the volume data V of the secondary balancing state, described treat Detect particle concentration data C outside spaceoutAnd the real time new corresponding to the space endoparticle thing concentration data C to be detected The average value of air quantity data is the fresh air volume data Q.
- A kind of 5. system for measuring fresh air volume in space to be detected, it is characterised in that including：First dust investigating, the second dust investigating and with first dust investigating and second dust The processor that detection device is connected；First dust investigating is positioned over outside space to be detected, for detecting and persistently recording outside the space to be detected Particle concentration data Cout, and when stopping detection and record by particle concentration data C outside the space to be detectedoutSend To the processor；Second dust investigating is positioned in space to be detected, for detecting and persistently recording in the space to be detected Particle concentration data C, and the space endoparticle thing concentration data C to be detected is sent to institute when stopping detection and record State processor；The processor is used to receive particle concentration data C outside the space to be detectedout, the space endoparticle to be detected The thing concentration data C and spatial volume data V to be detected measured, and according to particle concentration outside the space to be detected Data Cout, the endoparticle thing concentration data C in space to be detected and the spatial volume data V to be detected measured, pass through FormulaCalculating is carried out to handle to obtain fresh air volume data Q,Wherein, the system also includes：Air purifier, for after measurement starts to purify air quantity as QcSpeed purification institute State the particulate matter in space to be detected.
- 6. the system of fresh air volume in measurement space to be detected according to claim 5, it is characterised in thatIn the spatial volume data V≤60m to be detected3When, the air purifier purifies air quantity≤200m3/h；Treated described Detect spatial volume data V ＞ 60m3When, the air purifier purification air quantity ＞ 200m3/h。
- 7. the system of fresh air volume in measurement space to be detected according to claim 5, it is characterised in that：Second dust investigating is positioned at the space center to be detected, first dust investigating and described second Dust investigating is highly consistent.
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| CN201610174114.7A CN105717260B (en) | 2016-03-24 | 2016-03-24 | A kind of method and system for measuring fresh air volume in space to be detected |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610174114.7A CN105717260B (en) | 2016-03-24 | 2016-03-24 | A kind of method and system for measuring fresh air volume in space to be detected |
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| CN109916800B (en) * | 2019-04-04 | 2022-01-11 | 南通大学 | Method and system for measuring room particulate matter permeability coefficient |
| CN109991146B (en) * | 2019-04-04 | 2024-04-26 | 南通大学 | System for measuring permeability coefficient of particles in room |
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