CN203688407U - Device for simulating fly over and settlement characteristics of dust in room - Google Patents
Device for simulating fly over and settlement characteristics of dust in room Download PDFInfo
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- CN203688407U CN203688407U CN201420011054.3U CN201420011054U CN203688407U CN 203688407 U CN203688407 U CN 203688407U CN 201420011054 U CN201420011054 U CN 201420011054U CN 203688407 U CN203688407 U CN 203688407U
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Abstract
The utility model discloses a device for simulating fly over and settlement characteristics of dust in a room, and belongs to the field of building environments. The device comprises a closed experiment environment bin, a vitamin B2 powder body, a detector for distinguishing biological particles and non-biological particles, a volumetric flask and a nitrogen tank, wherein the vitamin B2 powder body is arranged in the volumetric flask in the closed experiment environment bin and is blown into the volumetric flask through nitrogen in the nitrogen tank, so that dust particles are dispersed in the closed experiment environment bin; the detector for distinguishing the biological particles and the non-biological particles is used for performing laser illumination on the dust particles; the particle sizes of the particles are measured by the scattered light intensity emitted by laser illumination on the particles. The simulating device discusses the simulating powder body which replaces the dust in the room to do the research on the fly over and settlement characteristics; the instrument for separately detecting the biological particles and the non-biological particles is selected on the basis of the simulating powder body, so that a test measure for simulating the fly over and settlement characteristics of the dust in the room is developed, and a support is supplied to an indoor dust pollution measurement and control technology.
Description
Technical field
The utility model relates to a kind of disperse device of settling character of house dust of simulating, and belongs to architectural environment Contamination measurement and control field.
Background technology
In modern society, people's most of the time is spent indoor, and therefore indoor air environment is particularly important.The investigation discovery of Environmental Protection Agency through lasting 5 years, in residential architecture and public building, air pollution degree is very high, be several times to tens times of outdoor air pollution, and China's problem of indoor air quality more developed country is even more serious.House dust is the important carrier of microbes in air, in the time that dust is loaded with pathogenic microorganism, can cause propagation by air.As isolated Much's bacillus in the micronic dust of tuberculosis hospital, in the micronic dust of hepatitis B ward and public place, found hepatitis B surface antibody.In addition, the organic principle semi-volatile organic matter (SVOC) in indoor micronic dust, because of its disturbance endocrine and reproductive system and the carcinogenic multiple health effects such as asthma that cause, is subject to researcher and more and more pays close attention in American-European, Japan and other countries.But the complicacy distributing due to dust component, particle diameter, and harm to experimenter's health, cause the difficulty that its settling character of dispersing is measured, and there be limited evidence currently of has the testing research of this respect.
Summary of the invention
The utility model provides a kind of disperse device of settling character of house dust of simulating, and it can distinguish airborne biological particle and inanimate particle easy, fast and accurately.
The technical solution adopted in the utility model is: a kind of disperse device of settling character of house dust of simulating, comprise airtight experimental situation cabin, also comprise simulation powder, distinguish detecting device, volumetric flask and nitrogen pot biological and abiotic particle, nitrogen pot is connected to and is placed in the volumetric flask of having placed simulation powder in airtight experimental situation cabin by connecting pipe, the detecting device of distinguishing biological and abiotic particle is placed in airtight experimental situation out of my cabin, distinguishes biology and stretches in airtight experimental situation cabin with generating laser and the scattered light receiver of the detecting device of abiotic particle.
Described airtight experimental situation cabin adopts complete closed structure.
Described simulation powder (2) is selected Cobastab
2powder.
While stating device in the use, by Cobastab
2powder is placed in the volumetric flask in airtight experimental situation cabin, uses the nitrogen in nitrogen pot to be blown into stripping Cobastab in volumetric flask
2powder, carrying out dust granule in airtight experimental situation cabin scatters, nitrogen flow is set as 10L/min, uses the detecting device of distinguishing biological and abiotic particle to carry out Ear Mucosa Treated by He Ne Laser Irradiation to dust granule, and the scattered light intensity sending during according to Ear Mucosa Treated by He Ne Laser Irradiation particle is measured the particle size of particle.
The beneficial effects of the utility model are: the disperse device of settling character of this simulation house dust, device comprises airtight experimental situation cabin, Cobastab
2detecting device, volumetric flask and the nitrogen pot of powder, differentiation biology and abiotic particle, by Cobastab
2powder is placed in the volumetric flask in airtight experimental situation cabin, uses the nitrogen in nitrogen pot to be blown into stripping Cobastab in volumetric flask
2powder, carrying out dust granule in airtight experimental situation cabin scatters, nitrogen flow is set as 5-20L/min, uses the detecting device of distinguishing biological and abiotic particle to carry out Ear Mucosa Treated by He Ne Laser Irradiation to dust granule, and the scattered light intensity sending during according to Ear Mucosa Treated by He Ne Laser Irradiation particle is measured the particle size of particle.This analogue means has been inquired into a kind of disperse simulation powder of settling character research of house dust that replaces, and select on this basis and can divide the instrument of detection to biological particle and inanimate granulomere, develop the disperse means of testing of settling character of dust granule in a kind of simulating chamber, for house dust measuring contamination and control technology provide support.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of airtight experimental situation cabin and testing apparatus.
Fig. 2 is the background concentration value of abiotic particle and biologic grain in environmental experiment cabin.
Fig. 3 is simulation powder scanning electron microscope imaging photo.
Fig. 4 uses the test result (experiment 1) of inanimate particle tested under identical distribution condition.
Fig. 5 uses the test result (experiment 2) of inanimate particle tested under identical distribution condition.
Fig. 6 uses the test result (experiment 1) of biological particle tested under identical distribution condition.
Fig. 7 uses the test result (experiment 2) of biological particle tested under identical distribution condition.
In figure: 1, airtight experimental situation cabin, 2, simulation powder, 3, distinguish detecting device biological and abiotic particle, 4, volumetric flask, 5, nitrogen pot, 6, connecting pipe; A, inanimate particle tested, b, biological particle tested.
Embodiment
Fig. 1 shows the fundamental diagram of airtight experimental situation cabin and testing apparatus.In figure, the disperse device of settling character of simulation house dust comprises airtight experimental situation cabin 1, simulation powder 2, distinguishes detecting device 3, volumetric flask 4 and nitrogen pot 5 biological and abiotic particle, nitrogen pot 5 is connected to and is placed in the volumetric flask 4 of having placed simulation powder 2 in airtight experimental situation cabin 1 by connecting pipe 6, the detecting device 3 of distinguishing biological and abiotic particle is placed in outside airtight experimental situation cabin 1, distinguishes biology and stretches in airtight experimental situation cabin 1 with generating laser and the scattered light receiver of the detecting device 3 of abiotic particle.
Fig. 2 has represented do not simulating under the condition of powder distribution, the particle background value of 24 hours in airtight experimental situation cabin.As shown in Figure 2, under empty state, the inanimate granule density of 0.5-1.0 μ m is below 1000P/L, and the inanimate granule density of 1.0-3.0 μ m is below 100P/L, granule numbers more than 3.0 μ m is below 10P/L, and biological particle background concentration is all below 10P/L.Visible, the inanimate particle empty state concentration value of whichever particle size range is all high than biological granule density.Therefore, can infer that to use the impact of background concentration in the biological particle simulation suffered cabin of house dust little.
Fig. 3 has represented the scanning electron microscope imaging photo of simulation powder.Simulation powder belongs to harmless vitamin drug, and its principal ingredient is vitamin B2, harmless to experimenter.
Fig. 4,5,6,7 has represented to use inanimate particle tested and the test result of biological particle tested under identical distribution condition.House dust is simulated to powder and be placed in airtight experimental situation volumetric flask out of my cabin, use N
2be blown into stripping simulation powder in volumetric flask, carry out dust granule in airtight experimental situation cabin and scatter, N
2flow is 10L/min.From Fig. 4,5, for inanimate particle tested, before the particulate dispersion of 0.5-1.0 μ m, in air, average is 1000/L left and right, and the particle average of 1.0-3.0 μ m is 100/L left and right, and granule numbers more than 3.0 μ m is in 10/L left and right.On the whole, inanimate particle background concentration in environmental chamber is higher.After distribution, after reaching Cmax value, the inanimate particle of different-grain diameter starts sedimentation.Wherein, the inanimate particle Cmax value of 0.5-1.0 μ m reaches 10 times before scattering; The inanimate particle Cmax value of 1.0-3.0 μ m reaches hundred times before scattering; And more than 3.0 μ m particle extreme spread number can reach several thousand times.Use simulation powder (Fig. 6,7), it is more much lower than abiotic particle that the interior background concentration of cup is scattered in experiment, granule number below 15 μ m is 10P/L left and right, simulation powder Cmax value after distribution all reaches more than thousands of times before scattering, and after sedimentation in airtight experimental situation cabin biological particle more much lower than inanimate granule density value.Finally, the concentration level of biological particle simulation powder concentration value stabilization before distribution.Therefore, use the biological particle settling character of dispersing of analogue measurement house dust particle more accurately.
Claims (3)
1. simulate the disperse device of settling character of house dust for one kind, comprise airtight experimental situation cabin (1), it is characterized in that: also comprise simulation powder (2), distinguish detecting device (3) biological and abiotic particle, volumetric flask (4) and nitrogen pot (5), nitrogen pot (5) is connected to and is placed in the volumetric flask (4) of having placed simulation powder (2) in airtight experimental situation cabin (1) by connecting pipe (6), the detecting device (3) of distinguishing biological and abiotic particle is placed in outside airtight experimental situation cabin (1), generating laser and the scattered light receiver of distinguishing the detecting device (3) of biological and abiotic particle stretch in airtight experimental situation cabin (1).
2. a kind of disperse device of settling character of house dust of simulating according to claim 1, is characterized in that: described airtight experimental situation cabin (1) adopts complete closed structure.
3. a kind of disperse device of settling character of house dust of simulating according to claim 1, is characterized in that: described simulation powder (2) is selected Cobastab
2powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011054.3U CN203688407U (en) | 2014-01-08 | 2014-01-08 | Device for simulating fly over and settlement characteristics of dust in room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011054.3U CN203688407U (en) | 2014-01-08 | 2014-01-08 | Device for simulating fly over and settlement characteristics of dust in room |
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| Publication Number | Publication Date |
|---|---|
| CN203688407U true CN203688407U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420011054.3U Expired - Fee Related CN203688407U (en) | 2014-01-08 | 2014-01-08 | Device for simulating fly over and settlement characteristics of dust in room |
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|---|---|
| CN (1) | CN203688407U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760073A (en) * | 2014-01-08 | 2014-04-30 | 大连理工大学 | Device and testing method for simulating indoor dust flying-off and settling property |
-
2014
- 2014-01-08 CN CN201420011054.3U patent/CN203688407U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760073A (en) * | 2014-01-08 | 2014-04-30 | 大连理工大学 | Device and testing method for simulating indoor dust flying-off and settling property |
| CN103760073B (en) * | 2014-01-08 | 2015-10-28 | 大连理工大学 | The method of testing of the device of dust dispersion settling character in a kind of simulating chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20150108 |
|
| EXPY | Termination of patent right or utility model |