QC/T 998-2023 PDF English (QC/T 998-2015: Older version)
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Cabin air filter for automobiles
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| QC/T 998-2015 | English | 145 |
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The technical specification of automotive cabin air filter
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QC/T 998-2023: PDF in English (QCT 998-2023) QC/T 998-2023
QC
AUTOMOBILE INDUSTRY STANDARD
ICS 43.040.60
CCS T 26
Replacing QC/T 998-2015
Cabin air filter for automobiles
ISSUED ON. DECEMBER 20, 2023
IMPLEMENTED ON. JULY 01, 2024
Issued by. Ministry of Industry and Information Technology of the PRC
Cabin air filter for automobiles
1 Scope
This document specifies the classification and requirements, test methods, inspection
rules, marking, packaging, transportation, storage of cabin air filter for automobiles.
This document is applicable to the design, manufacture, and inspection of automotive
particle filters (or particle filters for passenger compartments) which have a volume
(length × width × height) of not less than 0.0012 m3.The particle filters with a volume
of less than 0.0012 m3 can also make reference to this document.
This document is applicable to the design, manufacture, inspection of automotive
combination filters and multi-functional filter for automobiles (or combination filters
and multi-functional filter for passenger compartments), which have a volume (length
× width × height) of not less than 0.0015 m3; combination filters and multi-functional
filters with a volume of less than 0.0015 m3 can also make reference to this document.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, for reference documents with
dates, only the versions corresponding to the dates apply to this document; for reference
documents without dates, the latest versions (including all amendments) apply to this
document.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1.Sampling
schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2912.3-2009 Textiles - Determination of formaldehyde - Part 3.High
performance liquid chromatography method
GB/T 5455-2014 Textiles - Burning behavior - Determination of damaged length,
afterglow time and after flame time of vertically oriented specimens
GB 8410-2006 Flammability of automotive interior materials
GB 21551.1-2008 General requirement of antibacterial and cleaning function for
household and similar electrical appliances
GB 21551.2-2010 Antibacterial and cleaning function for household and similar
electrical appliances - Particular requirements of material
GB/T 24346-2009 Textiles - Evaluation for anti-mould activity
GB/T 28950.2-2012 Road vehicles and internal combustion engines - Filter
vocabulary - Part 2.Definitions of characteristics of filters and their components
GB/T 28957.1 Road vehicles - Test dust for filter evaluation - Part 1.Silicon dioxide
test dust
GB/T 30512-2014 Requirements for prohibited substances on automobiles
GB/T 32085.1-2015 Automobiles - Cabin air filter - Part 1.Test for particulate
filtration
GB/T 32085.2-2015 Automobiles - Cabin air filter - Part 2.Test for gas filtration
FZ/T 60045-2014 Textile trim materials in the interior of automobiles - Test method
for fogging characteristics
QC/T 32-2017 Test methods of air cleaners for automobiles
QC/T 236-2019 Test method for automotive interior decorative material properties
QC/T 1000.1-2015 Performance requirements and test methods of non-woven on
automotive filter - Part 1.Non-woven of filters for passenger compartment
ISO 18184.2019 Textiles - Determination of antiviral activity of textile products
3 Terms and definitions
The terms and definitions as defined in GB 21551.1-2008, GB/T 28950.2-2012, GB/T
32085.1-2015, GB/T 32085.2-2015, as well as the following terms and definitions,
apply to this document.
3.1
Cabin air filter
Installed in the automotive air conditioning system, it consists of one or more units
to remove particulate matter, harmful gases or filtering devices with antibacterial
and anti-mildew functions from the circulating air entering the passenger
compartment and internal space of the vehicle. It is also called cab air filter,
automotive air conditioning filter, automotive air conditioning filter element, etc.
3.2
Particle filter
The filtration efficiency for test impurities with a specific particle size.
Note. Fractional filtration efficiency can be determined by the following two
different methods. one is to select impurities with a certain particle size range and
use the weight method to determine; the other method is to use impurities with a
wide particle size distribution and use the particle counting method to determine.
[Source. GB/T 28950.2-2012, 4.5.3.1]
3.9
Antibacterial
The process of removing or reducing bacteria and fungi on the object of action by
chemical, physical and other methods.
[Source. GB/T 21551.1-2008, 3.3]
3.10
Preventing mildew
The process of killing mold or hindering the growth and reproduction of mold and
its activity by chemical, physical and other methods.
[Source. GB/T 21551.1-2008, 3.4]
4 Classification and requirements
4.1 Classification of air conditioning filters
4.1.1 Based on the demand for air quality in the passenger compartment of the car, the
requirements of the air conditioning system for air cleanliness, the installation space
location, filtration area, type of filtration medium, power of the air conditioning unit,
manufacturing and other factors of the air conditioning filter, shall be as negotiated
between the supplier and the buyer and indicated in the agreement, contract, product
drawing and other documents. The performance of the same category of products shall
remain consistent.
4.1.2 Air conditioning filters are divided into particle filter, combination filter, multi-
functional filters according to their functions. Air conditioning filters under the three
major categories are divided into subcategories according to different performance
attributes. Particle filters are divided into Class I, Class II, Class III; combination filters
and multi-functional filters are divided into Class I and Class II.
4.2 Prohibited substances
4.16 Frame, sealing ring and other materials
The frame shape shall be complete; the bonding with the filter material and non-woven
filter cloth shall be firm; the strength and rigidity requirements shall be met. There shall
be no looseness, debonding, deformation. The sealing ring shape shall be complete; the
bonding with the frame shall be firm; the sealing performance requirements shall be
met. The stacking density, working capacity, particle size, etc. of the activated carbon
shall meet the requirements.
4.17 Appearance
The surface of the air conditioning filter shall be free of damage, impurities, stains; the
filter material, non-woven filter cloth and constituent materials shall not fall off
abnormally; the filter material and non-woven filter cloth shall not be separated,
damaged or de-bonded from the frame; the sealing parts shall not be incomplete,
cracked or de-bonded.
5 Test methods
5.1 Air conditioning filter test requirements
5.1.1 The test conditions, test impurities, test equipment, test devices, test samples, test
procedures, test reports of the differential pressure, fractional filtration efficiency, ash
capacity of particle filter, combination filter, multi-functional filters shall comply with
the provisions of GB/T 32085.1-2015.If there are differences between the test
conditions and the provisions of GB/T 32085.1-2015, this shall be noted in the test
report.
5.1.2 The gas filtration test of combination filters and multi-functional filters shall
comply with the provisions of GB/T 32085.2-2015.The termination condition of the
adsorption test is. The test is terminated when the gas concentration on the air outlet
side of the air conditioning filter test piece reaches 95% of the gas concentration on the
air inlet side; the adsorption is calculated. If there are differences between the test
conditions and the provisions of GB/T 32085.2-2015, this shall be noted in the test
report.
5.2 Prohibited substances
Test according to the provisions of GB/T 30512-2014.
5.3 Cleanliness
According to the environment and standing time requirements specified in 5.1.1 of
QC/T 32-2017, carefully remove the air conditioning filter packaging; carry out initial
weighing → carry out cleaning → carry out secondary weighing. The whole process
shall be completed within 30 minutes; the mass difference before and after cleaning of
the air conditioning filter is calculated.
5.4 Original differential pressure
The differential pressure of particle filter, combination filter, multi-functional filters
shall be tested according to the provisions of 8.1 "Determine the flow-initial pressure
drop curve" in GB/T 32085.1-2015.The test air flow rate is 150 m3/h, 300 m3/h, 450
m3/h, 600 m3/h (or the air flow rate negotiated by the supplier and the buyer), to measure
the static differential pressure between the inlet and outlet sides of the air conditioning
filter.
5.5 Particle fractional filtration efficiency
The particle fractional filtration efficiency of particle filter, combination filter, multi-
functional filters shall be in accordance with the provisions of 8.2 of GB/T 32085.1-
2015.The test air flow rate is 300 m3/h (or the air flow rate agreed upon by the supplier
and the buyer); the Arizona A2 (fine particles) test dust defined in GB/T 28957.1-2023
is used. The test dust concentration shall meet the particle number concentration range
of the test instrument and the calculation accuracy requirements of the fractional
filtration efficiency. The test shall be carried out with a lower dust concentration, which
should be lower than (75 ± 3.75) mg/m3.
5.6 NaCl aerosol fractional filtration efficiency
The NaCl aerosol fractional filtration efficiency of particle filter, combination filter,
multi-functional filters is in accordance with the provisions of 8.2 of GB/T 32085.1-
2015.The test air flow rate is 300 m3/h (or the air flow rate agreed upon by the supplier
and the buyer), but with the following modifications.
- NaCl aerosol. Under the compressed air of the specified pressure, a 2% NaCl
aqueous solution can be used to generate NaCl aerosol particles which have a
particle size of 0.02 μm ~ 2 μm through an aerosol generator.
- Particle size measurement. It should use scanning mobility particle size
spectrometer (SMPS).
5.7 Ash capacity
The ash capacity of particle filter, combination filter, multi-functional filters shall be
tested in accordance with 8.3 of GB/T 32085.1-2015; the test air flow rate is 300 m3/h
(or the air flow rate agreed upon by the supplier and the buyer); use Arizona A2 (fine
particles) and A4 (coarse particles) test dust (or other test impurities) defined in GB/T
28957.1-2023, which has a powder concentration of (75 ± 3.75) mg/m3 (or the
concentration agreed upon by the supplier and the buyer).
5.8 Gas adsorption performance
The gas adsorption performance of combination filters and multi-functional filters is
tested according to the provisions of GB/T 32085.2-2015, with an air flow rate of 150
m3/h (or the air flow rate agreed upon by the supplier and the buyer), using the test
gases and their concentrations of n-butane (C4H10), toluene (C7H8), sulfur dioxide (SO2),
nitrogen dioxide (NO2) specified in Table A.1 of GB/T 32085.2-2015 (or agreed upon
by the supplier and the buyer), to calculate the adsorption efficiency and adsorption
amount.
5.9 Antibacterial performance
According to the provisions of GB/T 21551.2-2010 and Appendix B (absorption
method), test pieces are cut from the air conditioning filter for testing.
5.10 Antiviral performance
According to the provisions of ISO 18184.2019, test pieces are cut from the air
conditioning filter for determination of antiviral activity.
5.11 Anti-mildew performance
According to the provisions of GB/T 24346-2009, test pieces are cut from the air
conditioning filter for testing.
5.12 Temperature resistance
5.12.1 High temperature test. Place the air conditioning filter in a constant temperature
box at 85 °C ± 1 °C for 24 hours; take it out; check the appearance; measure the
dimensions. After meeting the requirements of a) and b) in 4.9, the low temperature test
specified in 5.12.2 is carried out.
5.12.2 Low temperature test. Place the air conditioning filter in a constant temperature
box at -30 °C ± 1 °C for 24 hours; take it out; check the appearance; measure the
dimensions. After meeting the requirements of a) and b) in 4.9, the performance test
specified in 5.12.3 is carried out.
5.12.3 After the high temperature test and low temperature test are carried out to meet
the requirements of a) and b) in 4.9, it shall carry out the differential pressure, fractional
filtration efficiency, ash capacity, gas adsorption performance test.
5.13 Combustion characteristics
Horizontal combustion characteristics. According to the provisions of GB 8410-2006,
test pieces are cut from the air conditioning filter for testing.
Vertical combustion characteristics. According to the provisions of GB/T 5455-2014,
test pieces are cut from the air conditioning filter for testing; record the measured values
and average values of the afterburning time, smoldering time, damaged length.
7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Each product shall be marked with the manufacturer's name or trademark, product
model, airflow direction.
7.1.2 Each product certificate shall be marked with.
a) Manufacturer's name or trademark;
b) Product name, model, implemented standard;
c) The production date shall be indicated.
7.1.3 The outer surface of the packaging box shall be marked with.
a) Name and address of manufacturer;
b) Product name, model, implemented standard;
c) Date of manufacture, quantity, mass;
d) Dimensions. length × width × height, in millimeters (mm), as well as other signs;
e) There shall be signs such as "moisture-proof" and "handle with care".
7.2 Packaging
Each product shall be cleaned and packaged separately; it shall be sealed, dust-proof,
moisture-proof. Packaged products shall be placed in dry packaging boxes lined with
moisture-proof materials; it shall ensure that they will not be damaged during normal
transportation.
7.3 Transportation
7.3.1 When handling, be careful to handle with care; do not throw; avoid bumps.
7.3.2 When transporting, use protective and clean transportation tools; do not transport
together with contaminated substances.
7.4 Storage
Packaged products shall be stored in a dry, ventilated, clean environment, away from
direct sunlight and strong electromagnetic radiation, protected from rain, snow,
moisture. Under normal storage conditions, the manufacturer shall ensure that the
product will not rust, rot or degumming within 12 months from the date of exit-factory.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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