Cabin air filter for automobiles
1 Scope
This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of cabin air filters.
This document is applicable to the design, manufacture and inspection of cabin particle filters (or passenger and driver compartment particle filters) with volumes (length × width × height) not less than 0.0012m3, and for particle filters with volumes less than 0.0012m3, it may be used as a reference.
This document is applicable to the design, manufacture and inspection of cabin combination filters and multi-functional filters (or combination filters and multi-functional filters for passenger and driver compartments) with volumes (length × width × height) not less than 0.0015m3. For combination filters and multi-functional filters with volumes less than 0.0015m3, it may be used as a reference.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions 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.
GB/T 191-2008 Packaging - Pictorial marking for handling of goods
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 behaviour - Determination of damaged length afterglow time and afterflame 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 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
For the purposes of this document, the terms and definitions given in GB 21551.1-2008, GB/T 28950.2-2012, GB/T 32085.1-2015 and GB/T 32085.2-2015 and the following apply.
3.1
cabin air filter
filtering device installed in the automobile air-conditioning system, composed of one or more units to remove particles and harmful gases or with functions of being antibacterial and preventing mildew in the circulating air entering the automobile cabin and internal space, also known as passenger and driver compartment air filter, automobile air filter, automobile air filter element, etc.
3.2
particle filter
air filter capable of only separating and storing particles in the air flow, also known as dust filter, pollen filter, particle filter, etc.
3.3
combination filter
air filter capable of separating and storing particles in the air flow, and removing or adsorbing harmful gases and odors, also known as activated carbon filter, double-effect filter, etc.
3.4
multi-functional filter
air filter with the functions of separating and storing particles in the air flow, and removing or adsorbing harmful gases and odors, as well as being antibacterial and antiviral, and preventing mildew, also known as multi-functional air filter, multi-effect air filter, etc. in Chinese
3.5
fogging
condensation of any volatile substance onto a solid surface
[Source: FZ/T 60045-2014, 3.1]
3.6
odour characteristics
characteristics of materials or parts/components releasing volatile constituents with distinct odors when stored at specified temperatures and climatic conditions
3.7
differential pressure
difference in static pressure between the upstream and downstream of the filter
Note: The pressure measuring point for differential pressure is determined based on the test procedure.
[Source: GB/T 28950.2-2012, 4.3.8]
3.8
fractional filtration efficiency
filtration efficiency for test impurities with a specific particle size
Note: The fractional filtration efficiency may be measured by the following two different methods: one is to measure it using the impurities with a specific particle size range by the gravimetric method; the other is to measure it using impurities with widely distributed particle sizes by the particle counting method.
[Source: GB/T 28950.2-2012, 4.5.3.1]
3.9
antibacterial
process of eliminating or reducing bacteria and fungi on the action object by chemical or physical methods
[Source: GB/T 21551.1-2008, 3.3]
3.10
preventing mildew
process of killing mildew or impeding its growth, reproduction and activity by chemical or physical methods
[Source: GB/T 21551.1-2008, 3.4]
4 Classification and requirements
4.1 Classification of air filters
4.1.1 According to the requirement for air quality of automobile passenger and driver compartments, the requirements of the air-conditioning system for air cleanliness, air filter installation space location, filtering area, filtering media type, air-conditioning unit power, manufacturing and other factors, the classification of air filters shall be negotiated by the supplier and the purchaser, and written into the agreement, contract, product drawings and other documents, products of the same category shall be consistent in the various performance indicators.
4.1.2 Air filters are classified into particle filters, combination filters and multi-functional filters by their functions. Air filters within each of the three categories are classified into sub-categories based on performance attributes. Particle filters are classified into Categories I, II and III; combination and multi-functional filters into Categories I and II.
4.2 Prohibited substances
Materials used in air filters shall comply with the provisions on prohibited and restricted substances in the Global Automotive Declarable Substances List (GADSL) and be declared in IMDS or CAMDS. They shall comply with the provisions on content limits of prohibited substances in GB/T 30512-2014, 4.2.
4.3 Cleanliness
The cleanliness of an air filter shall be ≤ 0.15qve in milligrams (mg).
Note 1: qve is the rated air flow rate of an air filter, in cubic meters per hour (m3/h);
Note 2: The factor (0.15) preceding qve is in milligrams per cubic meter per hour [mg/(m3/h)].
Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and requirements
5 Test methods
6 Test rules
7 Marking, packaging, transportation and storage
