Automobiles - Cabin air filter - Part 1: Test for particulate filtration
1 Scope
This part of GB/T 32085 specifies the test for particulate (including dust, pollen, etc.) filtration of automobile cabin air filters.
It is applicable to automobile cabin air filters with flow rate of 150m3/h ~ 680m3/h.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5011 Inlet air cleaning equipment for internal combustion engines and compressors - Performance testing
ISO 12103-1 Road vehicles - Test dust for filter evaluation - Part 1: Arizona test dust
EN 779 Particulate air filters for general ventilation - Determination of the filtration performance
EN 1822-1 High efficiency air filters (EPA, HEPA and ULPA) - Part 1: Classification, performance testing, marking
ASTM F-328 Standard practice for calibration of an airborne particle counter using monodisperse spherical particles
VDI 2066 Particulate matter measurement of flow gas
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
test air flow rate
V
volume of test air passing through the filter section per unit time, expressed in cubic metres per hour (m3/h)
3.2
pressure loss
ΔPd
static pressure difference between the upstream and downstream sides of a filter, expressed in pascals (Pa)
3.3
initial pressure loss
ΔPA
pressure loss on both sides of a new filter or filter element, expressed in pascals (Pa)
3.4
final pressure loss
ΔPE
pressure loss on both sides of a filter or filter element after the dust addition procedure is completed, expressed in pascals (Pa)
3.5
filtration area
A
surface area of a filter or filter element for the purpose of filtration, expressed in square metres, m2
3.6
fractional efficiency
Ef(x)
ability to remove particles of a specified size
3.7
test dust-holding capacity
G
mass of test particulate collected from the test sample at the specified termination conditions (e.g. certain pressure loss) according to the test procedure in 8.3, expressed in grams (g)
4 Test conditions and test materials
4.1 Test conditions
4.1.1 Air condition
The temperature and relative humidity of air entering the air filter shall be (23±3)℃ and (50±2)% respectively. The above temperature and humidity shall be maintained during the whole process of testing the dust-holding capacity G of the filter. See Table D.2 for the summary of test conditions.
