CN106442274A - Testing device and testing method for determining absolute dust generating quantity of equipment - Google Patents
Testing device and testing method for determining absolute dust generating quantity of equipment Download PDFInfo
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- CN106442274A CN106442274A CN201610794951.XA CN201610794951A CN106442274A CN 106442274 A CN106442274 A CN 106442274A CN 201610794951 A CN201610794951 A CN 201610794951A CN 106442274 A CN106442274 A CN 106442274A
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- 238000012360 testing method Methods 0.000 title claims abstract description 191
- 239000000428 dust Substances 0.000 title claims abstract description 42
- 238000005070 sampling Methods 0.000 claims abstract description 56
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000007613 environmental effect Effects 0.000 claims description 45
- 238000013019 agitation Methods 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 27
- 238000010998 test method Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 230000001568 sexual effect Effects 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 abstract 2
- 238000000746 purification Methods 0.000 abstract 2
- 238000002156 mixing Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000178343 Butea superba Species 0.000 description 1
- 235000001911 Ehretia microphylla Nutrition 0.000 description 1
- 101100189552 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PCL6 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 108010066057 cabin-1 Proteins 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N2015/1024—Counting particles by non-optical means
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention relates to a testing device and a method for determining the absolute dust generating quantity of equipment. The testing device comprises an environment testing cabin, a cyclic purification air assembly, a stirring fan, an equipment platform and an optical particle counter, wherein the environment testing cabin is used for simulating an indoor environment; the cyclic purification air assembly is used for controlling the dust concentration background value of air in the environment testing cabin and comprises a circulating fan, a circulating air supply outlet and a circulating air return outlet, the circulating fan is communicated with the environment testing cabin through the circulating air supply outlet and the circulating air return outlet stirring fan; the stirring fan is hoisted at the center of the environment testing cabin and used for accelerating the air in the environment testing cabin to be evenly mixed; the equipment platform is positioned in the environment testing cabin and used for placing tested equipment; the optical particle counter is connected with the environment testing cabin through sampling holes formed in the side wall of the environment testing cabin, and used for measuring the dust concentration of air in the environment testing cabin. Compared with the prior art, the testing device has the advantages of being high in confidence level, wide in application range and the like.
Description
Technical field
The invention belongs to indoor air quality technical field, it is related to a kind of test for determining equipment powder amount absolute value
Apparatus and method.
Background technology
People's most of the time carries out activity indoors, and the impact to health for the indoor air quality can not be ignored.With
The seal more and more higher of modern architecture, people's also more and more higher of the requirement to indoor air quality.The nuisance of in the air
It is broadly divided into dirt, air and heat, wet four classes.Dirt is dispersed in the particulate material in gas, be the important pollutant of room air it
One, it is also the important indicator evaluating IAQ (indoor air quality).The main source of indoor accelerated test is indoor dust.
Therefore, for effective control indoor pollutant level with improve indoor air quality it is necessary to research is indoor all kinds of
The powder amount of dust equipment and its contribution to indoor accelerated test, provide foundation for making rational control strategy.
At present, evaluating when sending out dirt situation of indoor equipment, common method of testing has actual environment method of testing and environment
Cabin method of testing.Actual environment method of testing is carried out in the practical service environment of equipment, test result with strong points, but same set
Standby test value in different actual environments for the same operating might have larger difference, and the universality of test result is poor, actual refers to
Lead meaning not strong；Environmental chamber test rule be to carry out in environmental test chamber, environmental test chamber simulate indoor environment it is ensured that
The credibility of measurement result, turn avoid the result difference of different actual environment tests simultaneously, and actual directive significance is strong.
But, no matter being actual environment method of testing or environmental chamber method of testing, it is all generally in the running of equipment,
Measure the instantaneous concentration value of particulate matter near equipment, due to the stability and Particle distribution that particulate matter distributes cannot be determined
Uniformity, therefore cannot determine the absolute value of equipment powder amount by this concentration value.The concentration value so recording, for right
A dirt situation for equipment carries out evaluation can be relatively rough, and the formulation reliability for instructing indoor pollutant control strategy can compare
Difference.
Send out dirt situation in order to be able to more accurately valuator device, and test result is broadly applied to indoor pollution
It is necessary to manage to measure the absolute value of equipment powder amount in the formulation of thing control strategy.
In sum it is necessary to propose a kind of reliable test device and side for determining equipment powder amount absolute value
Method.
Content of the invention
The purpose of the present invention is exactly to overcome the defect of above-mentioned prior art presence to provide a kind of with a high credibility, applicable
The wide test device for determining equipment powder amount absolute value of scope and method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of test device for determining equipment powder amount absolute value, including：
Environmental test chamber, for simulating indoor environment；
Circularly purifying wind assembly, for controlling the dust content background valuess of air in described environmental test chamber, including circulation
Blower fan, circulated air air outlet and circulated air return air inlet, described circulating fan pass through circulated air air outlet and circulated air return air inlet with
Environmental test chamber connects；
Agitation fan, is lifted on described environmental test chamber central authorities, for accelerating the mixing of air in described environmental test chamber
Uniformly；
Equipment platform, in described environmental test chamber, for placing Device under test；
Optical particle counter, is connected by the thieff hatch and environmental test chamber being arranged on the wall of described environmental test chamber side
Connect, for measuring the dust content of air in described environmental test chamber.
Described environmental test chamber is a sealing space, and the air leakage rate of this sealing space is less than 0.05.
Described circulated air air outlet is passed through circulation wind pipeline and is connected with circulating fan, is provided with described circulated air return air inlet
Filter.
Described optical particle counter is connected with sampling tube, and this sampling tube is drawn from described thieff hatch.
A kind of method of testing being determined equipment powder amount absolute value using described test device, is comprised the following steps：
1) described environmental test chamber inner surface is cleaned, obtains airtight sexual satisfaction test in described test device cabin and want
In the maximum allowable continuous sampling duration △ Tc asking and cabin uniformity reach test request minimum need to stirring duration △ Tj；
2) Device under test is put in environmental test chamber, keep environmental test chamber airtight, open agitation fan, and at one
Operation is remained in the test process of tested operating mode；
3) ON cycle blower fan 2h, carries out self-cleaning to air in cabin, after the completion of close circulating fan；
4) close from circulating fan and shut beginning timing, timing duration is not less than described minimum need to be with stirring duration △ Tj；
5) by optical particle counter, gas in cabin is sampled, measure the dust content background valuess before tested operating mode
C0, sampling duration is less than described maximum allowable continuous sampling duration △ Tc；
6), after making Device under test run setting time under tested operating mode, close Device under test；
7) close from Device under test and shut beginning timing, timing duration is not less than described minimum need to be with stirring duration △ Tj；
8) by optical particle counter, gas in cabin is sampled, measure the dust content C after tested operating mode, sampling
Duration is less than described maximum allowable continuous sampling duration △ Tc；
9) using the dust content difference before and after tested state and test chamber volume V, calculate Device under test under tested operating mode
Powder amount absolute value；
10) tested operating mode, repeat step 2 are changed) -9), until all tested working condition measurements finish.
Described maximum allowable continuous sampling duration △ Tc passes through seal test in cabin and obtains, seal test in described cabin
It is specially：
11) keep environmental test chamber airtight, open agitation fan；
12) agitation fan runs enough durations；
13) air of environmental test chamber middle position is sampled, measurement dust content, continuous sampling 2h, per minute
Record a secondary data；
14) count the standard deviation of dust content measured value in different sampling durations；
15) with standard deviation as foundation, determine the maximum allowable continuous sampling duration △ of airtight sexual satisfaction test request in cabin
Tc.
A length of more than 5h when described enough.
Described minimum need to be passed through uniformity test in cabin with stirring duration △ Tj and obtain, and in described cabin, uniformity test is concrete
For：
21) keep environmental test chamber airtight, multiple representative a little is set in cabin；
22) open agitation fan, after 0.5h, the plurality of point that represents is sampled, measure dust content, each measuring point
Continuous sampling duration be not more than maximum allowable continuous sampling duration △ Tc；
23) agitation fan unlatching duration is changed to 1h, 1.5h, 2h and 2.5h, repeat step 22 respectively)；
24) count the dust content measurement of each group representative point meeting sealing requirements after different agitation fans open duration
The standard deviation of value；
25) contrast the corresponding dust content standard deviation representing point group after different agitation fans open duration, determine in cabin all
The minimum that even property reaches test request need to be with stirring duration △ Tj.
Described representative point includes upper, middle and lower totally 9 points in environmental test chamber central authorities, edge, corner.
When can not sample to whole representative points simultaneously, same group for differentiating uniformity in cabin represents the tired of point
Meter continuous sampling duration is not more than maximum allowable continuous sampling duration △ Tc.
Compared with prior art, the invention has the advantages that：
(1) test device of the present invention simulates indoor environment with large-scale environmental test chamber, close to actually used
Harmful substance release conditions under situation, turn avoid the result difference of different actual environments test simultaneously, reliability and credible
Degree is high, and actual directive significance is strong.
(2) method of testing provided by the present invention carrying out close inspection to the seal in test chamber and uniformity, obtains
Test device cabin in the maximum allowable continuous sampling duration of airtight sexual satisfaction test request and cabin uniformity reach test
Require minimum need to stirring duration on the basis of carry out the measurement that each operating mode divides into preparation dust quantity absolute value, set with respect to measurement
For a standby neighbouring dust concentration value, the absolute value of powder amount has wider Practical significance.
(3) method of testing provided by the present invention, before experiment formally starts, is cleaned to test chamber inner surface, to the greatest extent may be used
The impact to measurement result such as inner surface residual particles can be reduced, effectively increase the reliability of measurement result.
(4) present invention applied widely be it is adaptable to the measurement of most of indoor equipment powder amounts, or even indoor occupant
Powder amount also can be tested with this method.
(5) present invention provides reference for the powder amount test of specification various interior dust equipment, for studying various interiors product
The contribution amount provides convenient to indoor accelerated test for the dirt equipment, and the progress advancing indoor Pollutant Control Technology has been benefited.
Brief description
Fig. 1 is the schematic diagram of test device of the present invention；
Fig. 2 is the flow chart of method of testing provided by the present invention；
Fig. 3 is the 1# test result of seal test in the cabin of the specific embodiment of the invention；
Fig. 4 is the 2# test result of seal test in the cabin of the specific embodiment of the invention；
Fig. 5 is the point layout figure of uniformity test in the cabin of the specific embodiment of the invention；
Fig. 6 is the test result after opening agitation fan 2h in uniformity test in the cabin of the specific embodiment of the invention；
Fig. 7 is the test result of equipment (printer) powder amount under each operating mode of the specific embodiment of the invention；
The explanation of each component symbol in accompanying drawing 1：1- environmental test chamber, 2- circulated air air outlet, 3- circulated air return air inlet, 4-
Circulation wind pipeline, 5- agitation fan, the stainless steel platform of 6-, 7- Device under test, 8- thieff hatch.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention be not limited to
Following embodiments.
As shown in figure 1, the present embodiment provides a kind of test device for determining equipment powder amount absolute value, including environment
Test chamber 1, circularly purifying wind assembly, agitation fan 5, equipment platform 6 and optical particle counter.
Environmental test chamber 1 is used for simulating indoor environment, is the large-scale environmental test chamber of a sealing.In the present embodiment, environment
The nacelle volume of test chamber is 30m3, framework is aluminium section bar, and floor is corrosion resistant plate, and top board is composite metal plate, and four walls are floating
Method plate glass, gap is sealed with silica gel adhesive tape and glazing compound, and air leakage rate requires to be less than 0.05.
Circularly purifying wind assembly is used for controlling the dust content background valuess of air in environmental test chamber, including circulating fan,
Circulated air air outlet 2 and circulated air return air inlet 3, circulating fan is passed through circulated air air outlet 2 and circulated air return air inlet 3 and is surveyed with environment
Examination cabin 1 connects, and circulated air air outlet 2 is passed through circulation wind pipeline 4 and is connected with circulating fan, is provided with height at circulated air return air inlet 3
Effect filter.
Agitation fan 5 is lifted on environmental test chamber 1 central authorities, for the mix homogeneously of air in acceleration environment test chamber.
Equipment platform 6 is located in environmental test chamber 1, for placing Device under test 7.In the present embodiment, equipment platform 6 is one
Stainless steel platform.
Optical particle counter is connected with environmental test chamber 1 by the thieff hatch 8 being arranged on environmental test chamber 1 side wall,
Dust content for air in measuring environment test chamber.Optical particle counter is connected with sampling tube, and this sampling tube is from sampling
Draw in hole 8.
As shown in Fig. 2 the method for testing that above-mentioned test device is provided mainly include in cabin seal test, in cabin uniformly
Property test and each operating mode divide into preparation dust quantity test three links.Idiographic flow is as follows：
1st, cabin inner surface cleaning：Before experiment formally starts, reply test chamber inner surface is cleaned, as far as possible table in minimizing
The impact to measurement result such as face residual particles.
2nd, seal test in cabin：
(1) keep test chamber airtight, open agitation fan.
(2) agitation fan is allowed to run enough durations (more than 5h) it is ensured that gas has been sufficiently mixed uniformly in cabin.
(3) air of test chamber middle position is sampled, measure dust content, continuous sampling 2h, record per minute
One secondary data.
(4) count the standard deviation of dust content measured value in different sampling durations.
(5) with standard deviation as foundation, when determining the maximum allowable continuous sampling that seal in cabin disclosure satisfy that test request
Long △ Tc.
3rd, uniformity test in cabin：
(1) keep test chamber airtight.
(2) open agitation fan, after 0.5h, represent point (desirable test chamber central authorities, edge, corner to a series of in cabin
Upper, middle and lower totally 9 points) sampled, measure dust content, the continuous sampling duration of each measuring point not should be greater than maximum allowable
Continuous sampling duration △ Tc, when can not sample to whole representative points simultaneously it should be noted that being used for differentiating the same of uniformity
The accumulative continuous sampling duration of group measuring point not should be greater than maximum allowable continuous sampling duration △ Tc.
(3) agitation fan unlatching duration is changed to 1h, 1.5h, 2h and 2.5h respectively, repeats previous step.
(4) meet the standard of the dust content measured value of each group measuring point of sealing requirements after counting different stirring durations
Difference.
(5) correspond to the dust content standard deviation of measuring point group after contrasting different stirring durations, determine that in cabin, uniformity can reach
Minimum to test request need to be with stirring duration △ Tj.
4th, each operating mode divides into the test of preparation dust quantity：
(1) put into Device under test, keep test chamber airtight, open agitation fan, and in the test process of an operating mode
Remain operation.
(2) ON cycle blower fan 2h, carries out self-cleaning to air in cabin, after the completion of close circulating fan.
(3) close from circulating fan and shut beginning timing, the minimum that timing duration is no less than uniformity test gained needs to use
Stirring duration △ Tj, to ensure that in cabin, gas mixing is uniform.
(4) gas in cabin is sampled, measure dust content background valuess C before tested operating mode0, sampling duration should not surpass
Cross the maximum allowable continuous sampling duration △ Tc that seal tests gained, to ensure that in sampling period cabin, seal meets the requirements.
(5) so that Device under test is run under tested operating mode, after the completion of close Device under test.
(6) close from Device under test and shut beginning timing, the minimum that timing duration is no less than uniformity test gained needs to use
Stirring duration △ Tj, to ensure that in cabin, gas mixing is uniform.
(7) gas in cabin is sampled, measure the dust content C after tested operating mode, sampling duration is not to be exceeded airtight
Property test gained maximum allowable continuous sampling duration △ Tc, to ensure that in sampling period cabin, seal meets the requirements.
(8) using the poor (C-C of dust content before and after tested state0) and test chamber volume V, you can calculate Device under test
Powder amount absolute value under tested operating mode.
(9) the tested operating mode of change, repeat the above steps, can powder amount under other operating modes for the test equipment.
The present embodiment with laser printer as Device under test, with standby 15h, 20h, 25h and print 5% coverage rate A4 paper
Page 50, page 80 totally five kinds of running statuses be tested operating mode, only measure the emission of PM2.5 in powder amount test.
In specific embodiment, the parameter of relevant apparatus and equipment is as follows：
(1) test chamber parameter：Interior dead size length × width × height is 4000 × 3000 × 2500 (mm), volume 30m3；Framework
For 76 × 44 (mm) aluminium section bar, it is arranged on floor, wall is the thick float flat glass of 5mm, the thick rustless steel of floor 0.8mm
Plate, top board is composite metal plate, and encapsulant is silica gel adhesive tape and glazing compound；Temperature is controlled to be 15～40 DEG C, fluctuation degree
≤ 0.5 DEG C, the uniformity≤1.0 DEG C, warming and cooling rate >=0.2 DEG C；Control relative humidity is 40～70%RH, fluctuation degree≤2%
RH, the uniformity≤5%RH；Air-cleaning technique is 0.5～2 time/h, electronic flow≤0.01m3/h；Power reguirements power electricity consumption is
AC, 380V, 18kW, three-phase five-wire mode, electric consumption on lighting is AC, 220V, 4kW, single-phase three wire system.
(2) laser particle counter parameter：Particle counter is Palas Welas Promo 2000 particle diameter spectrometer, assembling
Welas 2300 pops one's head in, and measurement range is 0.17～10.00 μm, totally 57 particle diameter passages；The sampling interval of particle counter is
1s, the setting unitary sampling time is 60s, and unitary sampling result is the meansigma methodss in 60s；This instrument can read PM2.5 simultaneously
Mass concentration.
(3) Device under test (printer) parameter：During the page of printing A4 size, speed is up to 25ppm；Using PCL5 and
PCL6 printed driver and HP postscript level 3 emulate；Preferential input tray at most can accommodate page 10 and print Jie
Matter.
The test main points of specific embodiment and result are as follows：
1st, seal test in the cabin of specific embodiment：In order to ensure the reliability of test result, seal test is entered altogether
Go 2 times, be denoted as 1#, 2# respectively, distinguished as shown in Figure 3, Figure 4 over time by situation for the PM2.5 concentration measuring twice.
By calculating and analyzing the PM2.5 concentration standard deviation of test result twice it is believed that in the continuous monitoring 15min time,
The infiltration of outside air affects very little to measurement result it is believed that within this time period, the seal of test chamber is preferable, that is, really
Determine the maximum allowable continuous sampling duration △ Tc=15min that seal in cabin disclosure satisfy that test request.
2nd, uniformity test in the cabin of specific embodiment：Take upper, middle and lower totally 9 points in test chamber central authorities, edge, corner
Carry out uniformity detection as representing point, point layout is as shown in Figure 5.Due to only with a particle counter, and airtight
Property test in obtained maximum allowable continuous sampling duration △ Tc=15min, therefore, the monitoring of 9 measuring points is divided into 3 groups, every group 3
Individual measuring point, each point continuous monitoring 3min takes its meansigma methods, and one group of test completes in 10min.Wherein, open agitation fan 2h
PM2.5 concentration test result afterwards is as shown in Figure 6.
Stirred it is believed that opening by the PM2.5 concentration standard deviation calculating with contrast corresponding 3 groups of measuring points after different stirring durations
Mix fan 2h and can ensure that in cabin gas mixing uniformly, that is, determining uniformity in cabin and can reaching the minimum of test request needs to use
Stirring duration △ Tj=2h.
3rd, equipment (printer) powder amount test under each operating mode of specific embodiment：
(1) put into tested printer, keep test chamber airtight, open agitation fan；
(2) ON cycle blower fan 2h, carries out self-cleaning to air in cabin, after the completion of close circulating fan start timing；
(3) duration to be mixed reaches after the minimum obtaining in uniformity test need to use stirring duration △ Tj=2h it is believed that cabin
Interior gas is by evenly mixing；
(4) gas in cabin is sampled, measure PM2.5 concentration background valuess C before tested operating mode0, sampling duration should
Exceed the maximum allowable continuous sampling duration △ Tc=15min obtaining in seal test；
(5) make printer be in holding state 15h, after the completion of close printer start timing；
(6) duration to be mixed reaches after the minimum obtaining in uniformity test need to use stirring duration △ Tj=2h it is believed that cabin
Interior gas is by evenly mixing；
(7) gas in cabin is sampled, the PM2.5 concentration of measurement printer gas in the operating mode rear deck of standby 15h
Value C, sampling duration is not to be exceeded the maximum allowable continuous sampling duration △ Tc=15min obtaining in seal test；
(8) using the PM2.5 concentration difference (C-C before and after the standby 15h of printer0) and test chamber volume V=30m3, you can meter
Calculate PM2.5 powder amount absolute value under the operating mode of standby 15h for the printer；
(9) by tested operating mode change respectively for printer standby 20h, 25h and print 5% coverage rate A4 paper page 50,80
Page, repeat the above steps, the PM2.5 powder amount under the remaining operating mode of test, test result is as shown in Figure 7.
Claims (10)
1. a kind of test device for determining equipment powder amount absolute value is it is characterised in that include：
Environmental test chamber, for simulating indoor environment；
Circularly purifying wind assembly, for controlling the dust content background valuess of air in described environmental test chamber, including circulating fan,
Circulated air air outlet and circulated air return air inlet, described circulating fan is passed through circulated air air outlet and circulated air return air inlet and is surveyed with environment
The connection of examination cabin；
Agitation fan, is lifted on described environmental test chamber central authorities, for accelerating the mix homogeneously of air in described environmental test chamber；
Equipment platform, in described environmental test chamber, for placing Device under test；
Optical particle counter, is connected with environmental test chamber by the thieff hatch being arranged on the wall of described environmental test chamber side, uses
In the dust content measuring air in described environmental test chamber.
2. the test device for determining equipment powder amount absolute value according to claim 1 is it is characterised in that described ring
Border test chamber is a sealing space, and the air leakage rate of this sealing space is less than 0.05.
3. the test device for determining equipment powder amount absolute value according to claim 1 is it is characterised in that described follow
Ring wind air outlet is passed through circulation wind pipeline and is connected with circulating fan, is provided with filter at described circulated air return air inlet.
4. the test device for determining equipment powder amount absolute value according to claim 1 is it is characterised in that described light
Learn particle counter and be connected with sampling tube, this sampling tube is drawn from described thieff hatch.
5. a kind of method of testing determining equipment powder amount absolute value using the test device described in claim 1, its feature exists
In comprising the following steps：
1) described environmental test chamber inner surface is cleaned, obtains airtight sexual satisfaction test request in described test device cabin
In maximum allowable continuous sampling duration △ Tc and cabin uniformity reach test request minimum need to stirring duration △ Tj；
2) Device under test is put in environmental test chamber, keep environmental test chamber airtight, open agitation fan, and tested at one
Operation is remained in the test process of operating mode；
3) ON cycle blower fan 2h, carries out self-cleaning to air in cabin, after the completion of close circulating fan；
4) close from circulating fan and shut beginning timing, timing duration is not less than described minimum need to be with stirring duration △ Tj；
5) by optical particle counter, gas in cabin is sampled, measure dust content background valuess C before tested operating mode0, adopt
Sample duration is less than described maximum allowable continuous sampling duration △ Tc；
6), after making Device under test run setting time under tested operating mode, close Device under test；
7) close from Device under test and shut beginning timing, timing duration is not less than described minimum need to be with stirring duration △ Tj；
8) by optical particle counter, gas in cabin is sampled, measure the dust content C after tested operating mode, duration of sampling
Less than described maximum allowable continuous sampling duration △ Tc；
9) using the dust content difference before and after tested state and test chamber volume V, calculate Device under test sending out under tested operating mode
Dust quantity absolute value；
10) tested operating mode, repeat step 2 are changed) -9), until all tested working condition measurements finish.
6. method of testing according to claim 5 is it is characterised in that described maximum allowable continuous sampling duration △ Tc passes through
In cabin, seal test obtains, and seal test in described cabin is specially：
11) keep environmental test chamber airtight, open agitation fan；
12) agitation fan runs enough durations；
13) air of environmental test chamber middle position is sampled, measure dust content, continuous sampling 2h, record per minute
One secondary data；
14) count the standard deviation of dust content measured value in different sampling durations；
15) with standard deviation as foundation, determine the maximum allowable continuous sampling duration △ Tc of airtight sexual satisfaction test request in cabin.
7. method of testing according to claim 6 is it is characterised in that a length of more than 5h when described enough.
8. method of testing according to claim 5 is it is characterised in that described minimum need to be passed through in cabin with stirring duration △ Tj
Uniformity test obtains, and in described cabin, uniformity test is specially：
21) keep environmental test chamber airtight, multiple representative a little is set in cabin；
22) open agitation fan, after 0.5h, the plurality of point that represents is sampled, measure dust content, the company of each measuring point
Continuous sampling duration is not more than maximum allowable continuous sampling duration △ Tc；
23) agitation fan unlatching duration is changed to 1h, 1.5h, 2h and 2.5h, repeat step 22 respectively)；
24) count the dust content measured value of each group representative point meeting sealing requirements after different agitation fans open duration
Standard deviation；
25) contrast the corresponding dust content standard deviation representing point group after different agitation fans open duration, determine uniformity in cabin
The minimum reaching test request need to be with stirring duration △ Tj.
9. method of testing according to claim 8 is it is characterised in that described representative point includes environmental test chamber central authorities, side
Edge, upper, middle and lower totally 9 points in corner.
10. method of testing according to claim 8 can not be sampled to whole points that represent it is characterised in that working as simultaneously
When, when the accumulative continuous sampling duration for differentiating same group of representative point of uniformity in cabin is not more than maximum allowable continuous sampling
Long △ Tc.
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