CN102133496A - Dust filtering performance testing method and system of air filter for cab of vehicle on road - Google Patents
Dust filtering performance testing method and system of air filter for cab of vehicle on road Download PDFInfo
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- CN102133496A CN102133496A CN2010106128725A CN201010612872A CN102133496A CN 102133496 A CN102133496 A CN 102133496A CN 2010106128725 A CN2010106128725 A CN 2010106128725A CN 201010612872 A CN201010612872 A CN 201010612872A CN 102133496 A CN102133496 A CN 102133496A
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Abstract
The invention relates to the technical field of air filter performance tests, in particular to a dust filtering performance testing method and system of an air filter for a cab of a vehicle on the road. The testing method comprises the following steps of: testing the filter element filtering efficiency, i.e. respectively testing dust particle concentration C1 before a test sample piece is installed and dust particle concentration C2 after the test sample piece is installed; and calculating the filtering efficiency E according to a formula (C1-C2)/C1*100%, namely E=(C1-C2)/C1*100%. The testing method provided by the invention is more scientific and reasonable and can be used for accurately reflecting the dust filtering performance of the air filter, and a testing device provided by the invention has high precision for a testing result, thereby being favorable for controlling the quality of the filter, ensuring that a consumer phases a qualified air filter, and also being beneficial to a producer to continuously improve the production process, the production technology and the quality of products.
Description
Technical field:
The present invention relates to air filter Performance Detection technical field, refer in particular to a kind of road vehicle-take advantage of chamber of driving with air filter dust-filtering performance test methods and system.
Background technology:
At present, the air filter that various vehicles take advantage of the chamber of driving to use also belongs to nonstandard product, both there be not national standard, there is not relevant industry standard yet, this drives the chamber and is in uncontrollable state with the product quality of air filter with regard to making to take advantage of, and causes on the market air filter product quality uneven, not only brings loss to the consumer, also be unfavorable for simultaneously the producer's R﹠D work, be unfavorable for the improvement of production technology, production technology and the raising of product quality.
Yet relevant standard must be based upon on the basis that the performance indications of the air filter science of carrying out is detected usually.A most important performance of air filter is the dust-filtering performance, and dust-filtering also is one of its most important purposes.At present, also do not have the science detection method of air filter dust-filtering performance, more do not have coherent detection equipment.
Summary of the invention:
One of purpose of the present invention provides a kind of road vehicle-take advantage of chamber of driving with air filter dust-filtering performance test methods.
The present invention realizes that the technical scheme that its purpose adopts is: a kind of road vehicle-take advantage of chamber of driving is with air filter dust-filtering performance test methods, comprise the filter element filtering efficiency test in the described method of testing, promptly respectively powder dust particle concentration C 1 before the installation testing exemplar and the powder dust particle concentration C 2 behind the installation testing exemplar are measured, by formula (C1-C2)/C1*100% calculates filter efficiency E, i.e. E=(C1-C2)/C1*100%.
In the described filter efficiency test, geometric diameter x (the μ m of unit) by powder dust particle is divided into six rate ranges, be respectively 0.3≤x＜0.5,0.5≤x＜1.0,1.0≤x＜3.0,3.0≤x＜5.0,5.0≤x≤10.0, x＞10.0, the corresponding filter efficiency standard value range of each rate range.
Comprise also in the described method of testing that test falls in filter core pressure, promptly respectively the air pressure P2 behind air pressure P1 before the installation testing exemplar and the installation testing exemplar is measured, by formula P1-P2 calculating pressure difference P, i.e. P=P1-P2.
Comprise also in the described method of testing that filter core storage ash measures examination, promptly respectively the weight M1 of test Pretesting exemplar and the weight M2 of test back test sample measured that by formula M2-M1 calculates storage ash amount M, i.e. M=M2-M1.
Another object of the present invention is to provide a kind of test macro of implementing above-mentioned method of testing.
Described test macro comprises:
Circulating pipeline: be provided with the frequency conversion type axial flow blower that is used to produce wind-force in the described circulating pipeline, also be provided with the extraneous air intake valve at the inlet end of frequency conversion type axial flow blower; Described outside also has the test section that is used for the installation testing exemplar, also is provided with absolute filter cotton in the downstream of test section;
Give ash system: comprise the ash feeding device and the grey pipeline of giving that is connected circulating pipeline and ash feeding device of powder feeding dirt particle in circulating pipeline, and circulating pipeline is positioned at the upstream of described test section with the ash inlet of giving of giving grey pipeline junction;
Laser particle counter: the sampled point of laser particle counter is positioned at the downstream of test section test sample, measures before the installation testing exemplar and the corresponding powder dust particle concentration behind the installation testing exemplar;
Pressure gauge: manometric sampled point is positioned at the downstream of test section test sample, measures before the installation testing exemplar and the air pressure behind the installation testing exemplar;
Computer operating system: control blower fan respectively, give ash system, laser particle counter, manometric work and carry out corresponding data processing, generate test report.
Described extraneous air intake valve also is connected with the air pre-processing device, and described air pre-processing device is also by described computer operating system control.
Also be provided with honeycomb in the test section of described circulating pipeline and between to the ash inlet.
The described grey pipeline of giving of ash system of giving also is connected with dust granules dispersion treatment device.
Described laser particle counter is 6 passage laser particle counters.
Detection method of the present invention is science, reasonable more, more can reflect the dust-filtering performance of air filter exactly, and the height of precision as a result of checkout equipment of the present invention detection.Therefore help the control of cleaner quality, guarantee that the consumer buys qualified air filter, simultaneously, also help the producer and update production technology, production technology, improve the quality of products.
Description of drawings:
Fig. 1 is an air filter dust-filtering performance detecting system schematic diagram of the present invention.
The specific embodiment:
Road vehicle of the present invention-take advantage of and drive the chamber with comprising the filter element filtering efficiency test in the air filter dust-filtering performance test methods, promptly respectively powder dust particle concentration C 1 before the installation testing exemplar and the powder dust particle concentration C 2 behind the installation testing exemplar are measured, by formula (C1-C2)/C1*100% calculates filter efficiency (E), i.e. E=(C1-C2)/C1*100%.
In the described filter efficiency test, geometric diameter x (the μ m of unit) by powder dust particle is divided into six rate ranges, be respectively 0.3≤x＜0.5,0.5≤x＜1.0,1.0≤x＜3.0,3.0≤x＜5.0,5.0≤x≤10.0, x＞10.0, i.e. the corresponding filter efficiency critical field of each rate range.
The present invention adopts stagewise filter efficiency method of testing, can simulate actual condition more careful, more realistically the filtration of air filter is tested, thereby obtain more accurate, rational test result; And also can select suitable rate range when detecting according to the used air filter of different road vehicles, air filter is detected.
Comprise also in the described method of testing that test falls in filter core pressure, promptly respectively the air pressure P2 behind air pressure P1 before the installation testing exemplar and the installation testing exemplar is measured, by formula P1-P2 calculating pressure difference P, i.e. P=P1-P2.
Comprise also in the described method of testing that filter core storage ash measures examination, promptly respectively the weight M1 of test Pretesting exemplar and the weight M2 of test back test sample measured that by formula M2-M1 calculates storage ash amount M, i.e. M=M2-M1.
Below in conjunction with concrete test macro method of testing of the present invention is further specified.
As shown in Figure 1, test macro of the present invention comprises:
Circulating pipeline 1: be provided with the frequency conversion type axial flow blower 11 that is used to produce wind-force in the described circulating pipeline 1, also be provided with extraneous air intake valve 12 at the inlet end of frequency conversion type axial flow blower 11; Described outside also has the test section 13 that is used for installation testing exemplar a, also is provided with absolute filter cotton 14 in the downstream of test section 13;
Give ash system 2: comprise the ash feeding device 21 and the grey pipeline 22 of giving that is connected circulating pipeline 1 and ash feeding device 21 of powder feeding dirt particle in circulating pipeline 1, and circulating pipeline 1 is positioned at the upstream of described test section 13 with giving the grey inlet 23 of giving of grey pipeline 22 junctions;
Laser particle counter 3: the sampled point of laser particle counter 3 is positioned at the downstream of test section 13 test samples, measure before the installation testing exemplar and the corresponding powder dust particle concentration behind the installation testing exemplar, the laser particle counter 3 that uses in the present embodiment is 6 passage laser particle counters.
Pressure gauge 4: the sampled point of pressure gauge 4 is positioned at the downstream of test section 13 test samples, measures before the installation testing exemplar and the air pressure behind the installation testing exemplar;
Computer operating system 5: control frequency conversion type axial flow blower 11 respectively, give the work of ash system 2, laser particle counter 3, pressure gauge 4 and carry out corresponding data processing, generate test report.Mainly show: computer operating system 5 can be set parameters such as the rotating speed, controlled wind speed, intake of frequency conversion type axial flow blower 11 respectively; Set the parameters such as geometric diameter size of giving ash amount, dust granules of giving ash system 2; The sampling of control laser particle counter 3, pressure gauge 4 etc.; And record, processing, storage relevant parameters and test data etc. generate test report.
Described extraneous air intake valve 12 also is connected with air pre-processing device 6, and described air pre-processing device 6 is also by described computer operating system 5 controls.Preliminary treatment is carried out in the space that 6 pairs of air pre-processing devices enter in the circulating pipeline 1, makes air drying, cleaning, with protection axial flow blower and conduit assembly, also guarantees precision of test result simultaneously.
Also be provided with honeycomb 15 in the test section 13 of described circulating pipeline 1 and between to ash inlet 23, its objective is that to make the direction of motion of dust granules more regular, because of being subjected to the influence of pipeline camber, air-flow produces flow-disturbing, the particle direction of motion changes easily, therefore before entering test section, correct the particle direction of motion by honeycomb, to obtain test data more accurately.
The described grey pipeline 22 of giving of ash system 2 of giving also is connected with dust granules dispersion treatment device 24, and the dust granules that enters circulating line is fully disperseed, and avoids dust granules to assemble.Dispersion treatment device 24 main dependence feed the high speed hot blast in giving grey pipeline 22, dust granules is further disperseed.
Certainly, in the test macro, also be provided with auxiliary equipment such as flowmeter 7 among the present invention, flowmeter 7 is installed in the downstream of absolute filter cotton 14, and the user can set other apparatus operating parameters etc. according to its flow that records.
In the test macro of the present invention, the bigger equipment of noise is installed in outdoorly during work such as frequency conversion type axial flow blower 11, ash feeding device 21, air pre-processing device 6, and all the other equipment then are installed in indoor; Whole circulation formula pipeline adopts vertical layout, can reduce to take up room as far as possible, improves interior space utilization rate.
The course of work of test macro of the present invention is as follows: open intake valve 12, open frequency conversion type axial flow blower 11, air pre-processing device 6, make the mobile air-flow that produces of air in the circulating pipeline 1; Start then and give ash system 2, give ash in circulating pipeline 1, dust granules through the dispersion treatment of dispersion treatment device 24, enters circulating pipeline 1 after further disperseing before entering circulating pipeline 1; Dust granules enters before the test section 13, corrects traffic direction through honeycomb 15, makes dust granules pass through test section 13 along duct orientation; At this moment, computer operating system 5 control particle calculators 3, pressure gauge 4 are measured, and obtain corresponding measured value; Air-flow and dust granules filter all dust granules by behind the test section 13 by absolute filter cotton 14, guarantee to be back to the air cleaning of frequency conversion type axial flow blower 11, so circulation.
When implementing method of testing of the present invention, can carry out in the following manner:
Parameter before the test: can configure corresponding test condition for example wind speed, give parameters such as ash amount, dust granules particle diameter after, once test, obtain the preceding powder dust particle concentration C 1 of corresponding installation testing exemplar, the preceding air pressure P1 of installation testing exemplar etc. respectively, be stored into measurement result and corresponding test condition in the computer control system simultaneously; After changing test condition, write down relevant parameters and measurement result once more, standby;
When carrying out actual test, after configuring test condition, if used in the former test of test condition, then in fact the measurement result before the test can be thought known, because it has been stored in computer system and has suffered, the measurement before need not to test again; (certainly, also can test preceding relevant parameter once more according to actual conditions measures); After test sample a is installed in test section 13, start test macro by the test condition of setting, air pressure P2 behind powder dust particle concentration C 2, installation testing exemplar behind the installation testing exemplar that obtains correspondence respectively calculates filter efficiency E and pressure differential P respectively according to above-mentioned method of testing again.
In the method for testing of the present invention, filter core storage ash measures examination, test sample a adopts the high-precision electronic weigher to carry out check weighing before being installed in test section, obtain the preceding exemplar weight M1 of test, after through test, take off test sample, adopt the high-precision electronic weigher to carry out check weighing once more, obtain test back exemplar weight M2, by formula M=M2-M1 can calculate storage ash amount M.
Claims (9)
1. a road vehicle-the take advantage of chamber of driving is with air filter dust-filtering performance test methods, it is characterized in that: comprise the filter element filtering efficiency test in the described method of testing, promptly respectively powder dust particle concentration (C1) before the installation testing exemplar and the powder dust particle concentration (C2) behind the installation testing exemplar are measured, by formula (C1-C2)/C1*100% calculates filter efficiency (E), i.e. E=(C1-C2)/C1*100%.
2. road vehicle according to claim 1-the take advantage of chamber of driving is with air filter dust-filtering performance test methods, it is characterized in that: in the described filter efficiency test, geometric diameter (x) (the μ m of unit) by powder dust particle is divided into six rate ranges, be respectively 0.3≤x＜0.5,0.5≤x＜1.0,1.0≤x＜3.0,3.0≤x＜5.0,5.0≤x≤10.0, x＞10.0, the corresponding filter efficiency standard value range of each rate range.
3. road vehicle according to claim 1-the take advantage of chamber of driving is with air filter dust-filtering performance test methods, it is characterized in that: comprise also in the described method of testing that test falls in filter core pressure, promptly respectively the air pressure (P2) behind air pressure before the installation testing exemplar (P1) and the installation testing exemplar is measured, by formula P1-P2 calculating pressure poor (P), i.e. P=P1-P2.
According to claim 1 or 3 described road vehicles-the take advantage of chamber of driving with air filter dust-filtering performance test methods, it is characterized in that: comprise also in the described method of testing that filter core storage ash measures examination, promptly respectively the weight (M1) of test Pretesting exemplar and the weight (M2) of test back test sample are measured, by formula M2-M1 calculates storage ash amount (M), i.e. M=M2-M1.
5. a road vehicle-the take advantage of chamber of driving is with air filter dust-filtering Performance Test System, and it is characterized in that: described test macro comprises:
Circulating pipeline (1): be provided with the frequency conversion type axial flow blower (11) that is used to produce wind-force in the described circulating pipeline (1), also be provided with extraneous air intake valve (12) at the inlet end of frequency conversion type axial flow blower (11); Described outside also has the test section (13) that is used for the installation testing exemplar, also is provided with absolute filter cotton (14) in the downstream of test section (13);
Give ash system (2): what comprise the ash feeding device (21) of powder feeding dirt particle to circulating pipeline (1) in and is connected circulating pipeline (1) and ash feeding device (21) gives grey pipeline (22), and circulating pipeline (1) with give grey pipeline (22) junction be positioned at the upstream of described test section (13) to grey enter the mouth (23);
Laser particle counter (3): the sampled point of laser particle counter (3) is positioned at the downstream of test section (13) test sample, measures before the installation testing exemplar and the corresponding powder dust particle concentration behind the installation testing exemplar;
Pressure gauge (4): the sampled point of pressure gauge (4) is positioned at the downstream of test section (13) test sample, measures before the installation testing exemplar and the air pressure behind the installation testing exemplar;
Computer operating system (5): control blower fan (11) respectively, give the work of ash system (2), laser particle counter (3), pressure gauge (4) and carry out corresponding data processing, generate test report.
6. road vehicle according to claim 5-the take advantage of chamber of driving is with air filter dust-filtering Performance Test System, it is characterized in that: described extraneous air intake valve (12) also is connected with air pre-processing device (6), and described air pre-processing device (6) is also controlled by described computer operating system (5).
7. road vehicle according to claim 5-take advantage of the chamber of driving with air filter dust-filtering Performance Test System is characterized in that: also be provided with honeycomb (15) in the test section (13) of described circulating pipeline (1) and between to ash inlet (23).
8. road vehicle according to claim 5-take advantage of the chamber of driving air filter dust-filtering Performance Test System is characterized in that: the described grey pipeline (22) of giving of ash system (2) of giving also is connected with dust granules dispersion treatment device (24).
9. road vehicle according to claim 5-take advantage of the chamber of driving air filter dust-filtering Performance Test System, it is characterized in that: described laser particle counter (3) is 6 passage laser particle counters.
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| CN201010612872.5A CN102133496B (en) | 2010-12-29 | 2010-12-29 | Dust filtering performance testing method and system of air filter for cab of vehicle on road |
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| CN201010612872.5A CN102133496B (en) | 2010-12-29 | 2010-12-29 | Dust filtering performance testing method and system of air filter for cab of vehicle on road |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620947A (en) * | 2012-03-13 | 2012-08-01 | 南京航空航天大学 | Salt spray filter performance detecting system and method |
| CN104019965A (en) * | 2014-05-15 | 2014-09-03 | 南车青岛四方机车车辆股份有限公司 | Dust storm prevention performance test method and test device |
| CN106092622A (en) * | 2016-05-13 | 2016-11-09 | 薛景森 | Air purifier performance static demarcating method |
| CN106226098A (en) * | 2015-06-02 | 2016-12-14 | 东莞市海莎过滤器有限公司 | A kind of air filter filter effect detection device and detection method thereof |
| CN106525473A (en) * | 2016-10-26 | 2017-03-22 | 华南理工大学 | Device and method for detecting performances of air conditioner filter of passenger car |
| CN111551478A (en) * | 2020-05-13 | 2020-08-18 | 安泰科技股份有限公司 | Method for evaluating filtering precision and efficiency of submicron-grade liquid-solid separation system |
| CN114235666A (en) * | 2022-02-25 | 2022-03-25 | 徐州百艾电子科技有限公司 | System and method for detecting performance of filter element of purifier |
| CN114324116A (en) * | 2022-01-06 | 2022-04-12 | 中车青岛四方车辆研究所有限公司 | Filter performance testing device and testing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201159691Y (en) * | 2007-12-20 | 2008-12-03 | 比亚迪股份有限公司 | Performance detection apparatus of air filter |
| CN201314915Y (en) * | 2008-11-11 | 2009-09-23 | 天津世纪动力科技发展有限公司 | Device for measuring exhaust pollutant from motorcycle and engine thereof |
-
2010
- 2010-12-29 CN CN201010612872.5A patent/CN102133496B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201159691Y (en) * | 2007-12-20 | 2008-12-03 | 比亚迪股份有限公司 | Performance detection apparatus of air filter |
| CN201314915Y (en) * | 2008-11-11 | 2009-09-23 | 天津世纪动力科技发展有限公司 | Device for measuring exhaust pollutant from motorcycle and engine thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王志强: "空气滤清器过滤性能实验台的研制", 《中国优秀硕士学位论文全文数据库工程科技II辑》, no. 04, 15 April 2009 (2009-04-15) * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620947A (en) * | 2012-03-13 | 2012-08-01 | 南京航空航天大学 | Salt spray filter performance detecting system and method |
| CN104019965A (en) * | 2014-05-15 | 2014-09-03 | 南车青岛四方机车车辆股份有限公司 | Dust storm prevention performance test method and test device |
| CN104019965B (en) * | 2014-05-15 | 2016-09-07 | 中车青岛四方机车车辆股份有限公司 | Sand-proof method for testing performance and experimental rig |
| CN106226098A (en) * | 2015-06-02 | 2016-12-14 | 东莞市海莎过滤器有限公司 | A kind of air filter filter effect detection device and detection method thereof |
| CN106092622A (en) * | 2016-05-13 | 2016-11-09 | 薛景森 | Air purifier performance static demarcating method |
| CN106525473A (en) * | 2016-10-26 | 2017-03-22 | 华南理工大学 | Device and method for detecting performances of air conditioner filter of passenger car |
| CN111551478A (en) * | 2020-05-13 | 2020-08-18 | 安泰科技股份有限公司 | Method for evaluating filtering precision and efficiency of submicron-grade liquid-solid separation system |
| CN111551478B (en) * | 2020-05-13 | 2023-01-10 | 安泰科技股份有限公司 | Method for evaluating filtering precision and efficiency of submicron-grade liquid-solid separation system |
| CN114324116A (en) * | 2022-01-06 | 2022-04-12 | 中车青岛四方车辆研究所有限公司 | Filter performance testing device and testing method |
| CN114235666A (en) * | 2022-02-25 | 2022-03-25 | 徐州百艾电子科技有限公司 | System and method for detecting performance of filter element of purifier |
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Owner name: GAO YANG Free format text: FORMER OWNER: GAO YANG SHI BAIJUN Effective date: 20120511 |
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Effective date of registration: 20120511 Address after: 523000 R building, down Bridge Industrial Park, Dongguan, Guangdong, Dongcheng District Applicant after: Dongguan Haisha Filter Co., Ltd. Co-applicant after: Gao Yang Address before: 523000 R building, down Bridge Industrial Park, Dongguan, Guangdong, Dongcheng District Applicant before: Dongguan Haisha Filter Co., Ltd. Co-applicant before: Gao Yang Co-applicant before: Shi Baijun |
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