CN214096150U - Device for detecting various pollutants of road vehicle filter - Google Patents
Device for detecting various pollutants of road vehicle filter Download PDFInfo
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- CN214096150U CN214096150U CN202022853216.6U CN202022853216U CN214096150U CN 214096150 U CN214096150 U CN 214096150U CN 202022853216 U CN202022853216 U CN 202022853216U CN 214096150 U CN214096150 U CN 214096150U
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Abstract
The utility model relates to the technical field of filter detection, in particular to a device for detecting various pollutants of a road vehicle filter, which comprises an air processing unit, a filter testing unit, a pollution source unit and a detecting unit; the air treatment unit comprises an air inlet purification box and a tail gas purification box, a test section pipeline is provided with a clamp and an upstream and downstream detection port, and a test section pipeline exhaust port is communicated with an air inlet of the tail gas purification box; the pollution source unit comprises a dust generator, a gas pollution source, a liquid pollution source, a mass flow controller, an evaporator and a peristaltic pump, and the detection unit is provided with a pressure sensor, a temperature and humidity sensor, a particle counter, a TVOC detector, a sampling box and a plurality of detection solenoid valves on upstream and downstream detection pipelines. The device provided by the utility model can be complete accurate detection filter resistance, particulate matter filtration performance, gas contamination filtration performance.
Description
Technical Field
The utility model relates to a filter detects technical field, especially relates to a multiple pollutant detection device of road vehicle filter.
Background
People spend approximately 7% of their time in vehicles at ordinary times, with automobiles being the most common vehicle for people. The air quality of the carriage is seriously threatened by the severe air quality of the environment and the increasingly severe traffic jam in the city. Poor air quality in the carriage can damage the health of people and reduce the life and working quality of people. The key to maintaining good cabin air quality without concern for external environmental improvements is the air filter within the vehicle air conditioning system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a simple structure is provided, resistance, particulate matter filtration performance, the multiple pollutant detection device of gaseous pollutant filtration performance of road vehicle filter that can be complete, accurate detection filter.
The utility model discloses a realize through following technical scheme:
a detection device for various pollutants of a road vehicle filter comprises an air treatment unit, a filter test unit, a pollution source unit and a detection unit;
the air treatment unit comprises an air inlet purification box and a tail gas purification box, an air inlet of the air inlet purification box is communicated with external air, and an exhaust port of the tail gas purification box is provided with a variable frequency fan;
the filter testing unit is a testing section pipeline, an inlet of the testing section pipeline is communicated with an exhaust port of the air inlet purification box through a connecting pipeline, a turbine flowmeter is arranged on the connecting pipeline, a clamp is arranged in the middle of the testing section pipeline, the filter is arranged in the testing section pipeline through the clamp, an upstream detection port and a downstream detection port are arranged above and below the clamp, and an exhaust port at the tail end of the testing section pipeline is communicated with an air inlet of the tail gas purification box;
the pollution source unit comprises a dust generator, a gas pollution source, a liquid pollution source, a mass flow controller, an evaporator and a peristaltic pump, wherein an outlet of the dust generator is communicated with a particle injection port of the testing section pipeline through a dust generation pipeline and is provided with a dust generation electromagnetic valve;
the detection unit comprises an upstream detection pipeline and a downstream detection pipeline which are connected to the test section pipeline and located on the upper portion and the lower portion of the clamp, one end of the upstream detection pipeline is communicated with an upstream detection port of the test section pipeline, one end of the downstream detection pipeline is communicated with a downstream detection port of the test section pipeline, and the upstream detection pipeline and the downstream detection pipeline are provided with a pressure sensor, a temperature and humidity sensor, a particle counter, a TVOC detector, a sampling box and a plurality of detection electromagnetic valves.
Further, the device for detecting the multiple pollutants of the road vehicle filter is provided with an automatic control unit, a CPU of the automatic control unit receives signal input of a pressure sensor, a temperature and humidity sensor, a particle counter, a TVOC detector, a mass flow controller, a dust generator, an evaporator, a peristaltic pump, a turbine flowmeter, a frequency converter of a variable frequency fan and an electromagnetic valve, and a signal output end of the CPU is respectively connected with the mass flow controller, the evaporator, the peristaltic pump, the frequency converter of the variable frequency fan and the electromagnetic valve.
Optimally, a middle-effect filter, a high-efficiency filter and an activated carbon filter are arranged in an air inlet purifying box and a tail gas purifying box in the air treatment unit, and the middle-effect filter, the high-efficiency filter and the activated carbon filter are all W-shaped.
Furthermore, a diluter is arranged on the upstream detection pipeline.
Further, a particulate matter flow equalizing baffle is fixedly installed in the test section pipeline.
Preferably, the upstream and the downstream of the filter test unit are respectively provided with a buffer section.
Preferably, the material of the connecting pipeline is 304 steel, and the testing section pipeline of the filter testing unit is 316 stainless steel.
The beneficial effects of the utility model
The utility model discloses a multiple pollutant detection device of road vehicle filter who protects, including air treatment unit, filter detecting element, pollution sources unit, detecting element. The air treatment unit comprises air inlet purification and tail gas purification. The polluted gas unit respectively includes that pure gas takes place and liquid gas takes place two kinds of modes, and detecting element is including establishing pressure sensor, temperature and humidity sensor, counter, aerosol particle size spectrometer, the TVOC detector in test section pipeline anchor clamps both sides, and this detection device collection sends out dirt, sampling, dilution, polluted gas production and pollutant concentration detection as an organic whole, resistance, particulate matter filtering quality, the gaseous pollutant filtering quality of detection filter that can be complete, accurate.
The device is humanized, degree of automation is high, and data is accurate, compares with prior art, has realized that particulate matter detects and gaseous pollutant detects in an organic whole, and the operation is simple and easy swift, and structural design is reasonable, and test data is accurate reliable, has extensive application prospect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1, an air inlet purification box, 2, a connecting pipeline, 3, a turbine flowmeter, 4, a test section pipeline, 5, a tail gas purification box, 6, a variable frequency fan, 7, a dust generating electromagnetic valve, 8, a dust generator, 9, a gas source electromagnetic valve, 10, a mass flow controller, 11, a liquid source electromagnetic valve, 12, an evaporator, 13, a peristaltic pump, 14, a detection electromagnetic valve, 15, a diluter, 16, a particle counter, 17, a gas pollution source, 18, a sampling box, 19, a TVOC detector, 20, a liquid pollution source, 21, a pressure sensor, 22, a clamp, 23, a CPU, 24, a temperature and humidity sensor, 25, a frequency converter, 26, an upstream detection pipeline, 27, gas, liquid, 28, a particle injection port, 29, an upstream detection port, 30, a downstream detection port and 31, a flow equalizing baffle are arranged.
Detailed Description
A device for detecting multiple pollutants in a road vehicle filter comprises an air treatment unit, a filter testing unit, a pollution source unit and a detection unit.
The air treatment unit comprises an air inlet purification box 1 and a tail gas purification box 5, an air inlet of the air inlet purification box is communicated with external air, and a variable frequency fan 6 is installed at an exhaust port of the tail gas purification box, so that tail gas after purification can be conveniently discharged from an outlet of the variable frequency fan.
The filter testing unit is a testing section pipeline 4, an inlet of the testing section pipeline is communicated with an exhaust port of the air inlet purification box through a connecting pipeline 2, a turbine flowmeter 3 is arranged on the connecting pipeline, a clamp 22 is arranged in the middle of the testing section pipeline, the filter is arranged in the testing section pipeline through the clamp, an upstream detection port 29 and a downstream detection port 30 are arranged above and below the clamp, and an exhaust port at the tail end of the testing section pipeline is communicated with an air inlet of the tail gas purification box;
the pollution source unit comprises a dust generator 8, a gas pollution source 17, a liquid pollution source 20, a mass flow controller 10, an evaporator 12 and a peristaltic pump 13, wherein the outlet of the dust generator is communicated with a particle injection port 28 of the test section pipeline through a dust generation pipeline and is provided with a dust generation electromagnetic valve 7, and the dust generation electromagnetic valve is adjusted to be in an open state, so that dust generation of the pipeline can be realized;
the gas inlet of the mass flow controller is communicated with the outlet of the gas pollution source, the gas outlet of the mass flow controller is communicated with the gas and liquid injection port 27 of the test section pipeline through a gas source pipeline, and a gas source electromagnetic valve 9 is installed on the gas source pipeline and used for generating and controlling the gas pollution.
The inlet of the peristaltic pump is communicated with the outlet of the liquid pollution source, the outlet of the peristaltic pump is communicated with the inlet of the evaporator, the outlet of the evaporator is communicated with the gas and liquid injection port of the test section pipeline through a liquid source pipeline, a liquid source electromagnetic valve 11 is arranged, the peristaltic pump is used for generating liquid pollutants, and the liquid is heated and evaporated through the evaporator to enable the liquid to be gasified and then enter the test section pipeline.
The detection unit comprises an upstream detection pipeline 26 and a downstream detection pipeline which are connected to the test section pipeline and located on the upper and lower streams of the clamp, one end of the upstream detection pipeline is communicated with an upstream detection port of the test section pipeline, one end of the downstream detection pipeline is communicated with a downstream detection port of the test section pipeline, the upstream detection pipeline and the downstream detection pipeline are provided with a pressure sensor 21, a temperature and humidity sensor 24, a particle counter 16, a TVOC detector 19, a sampling box 18 and a plurality of detection electromagnetic valves 14, and the tail ends of the upstream detection pipeline and the downstream detection pipeline can be communicated with a pollution source to form circulation and prevent discharge.
Further, the device for detecting various pollutants of the road vehicle filter is provided with an automatic control unit, a CPU23 of the automatic control unit receives signal input of a pressure sensor, a temperature and humidity sensor, a particle counter, a TVOC detector, a mass flow controller, a dust generator, an evaporator, a peristaltic pump, a turbine flowmeter, a frequency converter 25 of a variable frequency fan and an electromagnetic valve, a signal output end of the CPU is respectively connected with the mass flow controller, the evaporator, the peristaltic pump, the frequency converter of the variable frequency fan and the electromagnetic valve, the pressure difference value, the dust content, the pollutant gas adsorption capacity and the air volume of two sides of a clamp can be measured, and the filter performance of the filter material under different air volumes, different dust contents and different pollutant gas concentrations can be obtained after data processing. The sampling device conveys gas in the pipeline of the testing section into a buffer bottle in the sampling device through a built-in vacuum pump, and the TVOC detector samples from the buffer bottle;
optimally, a middle-effect filter, a high-efficiency filter and an activated carbon filter are arranged in an air inlet purifying box and a tail gas purifying box in the air treatment unit, and the middle-effect filter, the high-efficiency filter and the activated carbon filter are all W-shaped. The air inlet purification box is used for ensuring that air flow in the test pipeline system is clean and does not influence a test result, and the tail gas purification box is used for ensuring that exhausted air is clean and does not pollute the environment. The medium-effect filter adopts a medium-effect filter of F7 or F8 grade, and the high-efficiency filter adopts a high-efficiency filter of H12 grade or above.
The cleanliness detection result of the specific filter test unit is shown in the table I when the air volume is 600m3/h and the sampling flow is 28.3L/min:
watch 1
According to ISO clause 4.2.1.2: the air cleanliness is that the number of background particles is less than 1 percent (national standard is 2 percent) of the number of the particles when the efficiency is tested. The dust concentration of the dust generated by the dust generation efficiency is 1mg/m3, and the estimated counting concentration is 14000#/cm 3. The cleanliness of the pipeline meets the requirements.
Wind speed uniformity detection
According to standard requirements, 5 measuring points are uniformly distributed at the upstream of a filter in a pipeline of a testing section, each measuring point measures for 5 minutes, one measuring point is counted per minute, and a result table II:
watch two
According to the standard requirement, the deviation between the wind speed of each measuring point and the average wind speed is not more than +/-10%, and the measured result meets the standard.
And (3) detecting the stability of air volume:
the air volume at the positions of the 5 measuring points is tested, and the result is shown in the table three:
watch III
| Serial number | Air volume set value m3/h | Observed value m3/ | Observation time | |
| 1 | 200 | 200、201 | 3 |
|
| 2 | 300 | 300、301 | 3 minutes | |
| 3 | 400 | 399、400 | 3 |
|
| 4 | 500 | 500、501 | 3 |
|
| 5 | 600 | 599、600 | 3 minutes |
The air volume is stable within 10s usually, and the stable numerical value is basically kept unchanged and meets the requirement of the standard +/-2%.
And (3) detecting the dust generation stability:
the dust is continuously sent for 8 minutes, and the sampling is carried out 4 times, 30s for each sampling, and 90s for each sampling interval. The data obtained are shown in table four:
watch four
The coefficient of variation of the stability of the efficiency aerosol (within each size channel) within the range of 0.3-5 μm is within + -10% and within + -20% within the range of 5-10 μm, as required by ISO clause 4.2.4.2. From the above data, it can be seen that the dust stability meets the requirements.
Dust emission uniformity detection
The sampling points are the same as the sampling points in the wind speed uniformity test, the sampling time of each sampling point is 30s, the sampling interval is 5s, and the data in the following table of 5 times is taken as the average value of the 5 times of sampling, specifically shown in the table five:
watch five
The coefficient of variation for the uniformity of the efficiency aerosol (within each size channel) within the range of 0.3-5 μm is within + -10% and within + -20% within the range of 5-10 μm, as required by ISO clause 4.2.4.2. From the above data, it can be seen that the dust uniformity satisfied the requirements.
Gaseous contaminant uniformity detection
The sampling points are the same as the sampling points in the wind speed uniformity test, the sampling time of each sampling point is 60s, the sampling interval is 60s, the sampling is carried out for 3 times, and the table data is the average value of the sampling for 3 times, specifically shown in table six.
Watch six
According to ISO 11155-2, the concentration of the inflow pollutants should be within + -3% of the set concentration during the test time, and the uniformity of the gaseous pollutants meets the requirement as can be seen from the above test data.
Further, diluter 15 is installed on the upstream test pipeline, prevents that particulate matter concentration is too big, influences measurement accuracy to produce the destruction to the instrument.
Further, a particulate matter flow equalizing baffle 31 is fixedly installed in the test section pipeline and can be used for equalizing particulate matters, and particle size distribution of the particulate matters is guaranteed.
Optimally, the upstream and the downstream of the filter test unit are respectively provided with a buffer section, so that the concentration stability of pollutants on the upstream and the downstream of the filter can be ensured.
Preferably, the connecting pipeline is made of 304 steel, the testing section pipeline of the filter testing unit is made of 316 stainless steel, and the corrosion resistance of the detection device can be improved due to the fact that testing gas has strong corrosivity.
The utility model provides a road vehicle filter multiple pollutant detection device, the filter that awaits measuring passes through anchor clamps and installs the detection mouth department at test section pipeline to be connected with air handling unit, filter test unit, aerosol source unit, pollutant gas source unit, detect filter upstream and downstream both sides pressure differential value, dust content, polluted gas adsorption capacity and amount of wind, can reach filter material's different amount of wind, different dust content, filter performance under the different polluted gas concentration through calculating.
The detection device integrates dust generation, sampling, dilution, pollution gas generation and pollutant concentration detection, and can completely and accurately detect the resistance, the particulate matter filtering performance and the gas pollutant filtering performance of the filter. The device is humanized, degree of automation is high, and data is accurate, compares with prior art, has realized that particulate matter detects and gaseous pollutant detects in an organic whole, and the operation is simple and easy swift, and structural design is reasonable, and the test data is accurate reliable.
To sum up, the utility model discloses a road vehicle filter multiple pollutant detection device who protects, simple structure, resistance, particulate matter filtering quality, the gaseous pollutant filtering quality of detection filter that can be complete, accurate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A detection device for various pollutants of a road vehicle filter is characterized by comprising an air treatment unit, a filter test unit, a pollution source unit and a detection unit;
the air treatment unit comprises an air inlet purification box and a tail gas purification box, an air inlet of the air inlet purification box is communicated with external air, and an exhaust port of the tail gas purification box is provided with a variable frequency fan;
the filter testing unit is a testing section pipeline, an inlet of the testing section pipeline is communicated with an exhaust port of the air inlet purification box through a connecting pipeline, a turbine flowmeter is arranged on the connecting pipeline, a clamp is arranged in the middle of the testing section pipeline, the filter is arranged in the testing section pipeline through the clamp, an upstream detection port and a downstream detection port are arranged above and below the clamp, and an exhaust port at the tail end of the testing section pipeline is communicated with an air inlet of the tail gas purification box;
the pollution source unit comprises a dust generator, a gas pollution source, a liquid pollution source, a mass flow controller, an evaporator and a peristaltic pump, wherein an outlet of the dust generator is communicated with a particle injection port of the testing section pipeline through a dust generation pipeline and is provided with a dust generation electromagnetic valve;
the detection unit comprises an upstream detection pipeline and a downstream detection pipeline which are connected with the upstream and downstream of the clamp in the test section, one end of the upstream detection pipeline is communicated with an upstream detection port of the test section pipeline, one end of the downstream detection pipeline is communicated with a downstream detection port of the test section pipeline, and the upstream detection pipeline and the downstream detection pipeline are provided with a pressure sensor, a temperature and humidity sensor, a particle counter, a TVOC detector, a sampling box and a plurality of detection electromagnetic valves.
2. The device for detecting multiple pollutants on a road vehicle filter according to claim 1, wherein an automatic control unit is provided, a CPU of the automatic control unit receives signal inputs of the pressure sensor, the temperature and humidity sensor, the particle counter, the TVOC detector, the mass flow controller, the dust generator, the evaporator, the peristaltic pump, the turbine flowmeter, a frequency converter of the variable frequency fan and the electromagnetic valve, and signal output ends of the CPU are respectively connected with the mass flow controller, the evaporator, the peristaltic pump, the frequency converter of the variable frequency fan and the electromagnetic valve.
3. The device for detecting multiple pollutants on a road vehicle filter according to any one of claims 1 to 2, wherein a middle-effect filter, a high-efficiency filter and an activated carbon filter are respectively installed in the air inlet purification box and the tail gas purification box in the air treatment unit, and the middle-effect filter, the high-efficiency filter and the activated carbon filter are all W-shaped.
4. The apparatus for detecting multiple contaminants on a road vehicle filter according to any one of claims 1-2, wherein a diluter is installed in the upstream detection line.
5. The device for detecting the multiple pollutants in the road vehicle filter according to any one of claims 1 to 2, wherein a particulate matter flow equalizing baffle is fixedly installed in the test section pipeline.
6. The apparatus for detecting multiple pollutants on a road vehicle filter according to any one of claims 1 to 2, wherein buffer sections are respectively provided at the upstream and downstream of the filter test unit.
7. The apparatus for detecting multiple pollutants on a road vehicle filter according to any one of claims 1 to 2, wherein the material of the connecting pipe is 304 steel, and the test section pipe of the filter test unit is 316 stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022853216.6U CN214096150U (en) | 2020-12-02 | 2020-12-02 | Device for detecting various pollutants of road vehicle filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022853216.6U CN214096150U (en) | 2020-12-02 | 2020-12-02 | Device for detecting various pollutants of road vehicle filter |
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| CN214096150U true CN214096150U (en) | 2021-08-31 |
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