GB/T 21551.3-2024Antimicrobial and cleaning function of household and similar electrical appliances - Part 3 : Particular requirements for air cleaner (English PDF)

4.1 Hygiene and Safety Requirements

4.1.1 Hygiene and safety of whole machine The harmful substances generated by the cleaner itself shall comply with the requirements of Table 1.

4.1.2 Hygiene and safety of components and parts Materials or components and parts made of them that are explicitly stated to have the antimicrobial function and are in close contact with the human body during use shall comply with the relevant hygiene and safety requirements in GB/T 21551.1.

4.2 Requirements for Antimicrobial, Microbial Reduction and Cleaning Functions

4.2.1 Functional requirements for materials and components and parts Materials that are explicitly stated to have the antimicrobial, preventing mildew, antiallergenic and antiviral functions, or components and parts containing materials with the above-mentioned functions, shall have their antimicrobial rate, preventing mildew level, antiallergenic rate and antiviral rate in compliance with the requirements of GB/T 21551.2.

4.2.2 Functional requirements for the whole machine

4.2.2.1 Microbial reduction For cleaners that are explicitly stated to have the microbial reduction function, the microbial reduction rate shall not be lower than 90%.

4.2.2.2 Allergen reduction For cleaners that are explicitly stated to have the allergen reduction function, the allergen reduction rate shall not be less than 80%.

5.1 Test Conditions

5.1.1 General conditions Except for the special requirements specified in the appendixes of this document, the tests shall be carried out in accordance with the conditions specified in GB/T 18801.

5.1.3 Test procedures When the cleaner is tested for harmful substances, microbial reduction and cleaning, etc., it shall be operated under the normal working conditions (optimal functional mode) explicitly stated by the manufacturer. If the manufacturer does not specify, it shall be operated at the maximum wind speed gear and all relevant functions shall be turned on.

5.1.4 Placement position The tests shall be carried out in accordance with the methods described in GB/T 18801.

5.2.1 Hygiene and safety tests of the whole machine

5.2.1.1 Arrangement of sampling points During the hygiene and safety test of the whole machine, when the test position is the air outlet, in the middle of the specified distance perpendicular to the air outlet direction of the plane where the air outlet is located, arrange 1 sampling point. If the appliance has multiple air outlets, then, arrange a sampling point at each air outlet, and the concentration of each air outlet is simultaneously tested. When the test position is around the appliance, the sampling point is perpendicular to the center plane of the cleaner.

5.2.1.2 Ozone leakage The ozone leakage is tested in accordance with the following steps.

5.2.1.3 UV leakage The UV leakage is tested in accordance with the following steps.

a) The test shall be conducted in an environment without obvious air flow;

b) The main wavelength of the UV leakage test is 253.7 nm. If the cleaner explicitly states ultraviolet light of other main wavelengths, then, in addition to the main wavelength test, the UV leakage of the explicitly stated wavelengths shall also be measured;

c) When testing the UV leakage around the cleaner, the cleaner to be tested needs to be placed in a dark room (with a black radiation barrier to minimize reflection and stray light);

d) Start the test procedures of the cleaner to be tested, after 5 minutes, measure the ultraviolet illuminance;

e) Test result. the maximum value among all points is taken as the test result.

5.2.1.4 TVOC mass concentration The TVOC mass concentration is tested in accordance with the following steps.

a) The test shall be conducted in an open environment without obvious air flow;

b) TVOC mass concentration can be sampled and tested by the solid adsorption-thermal desorption-gas chromatography-mass spectrometry method specified in GB/T 18883; it can also be tested by an online gaseous pollutant mass concentration tester, and the sampling time should be 45 minutes; the TVOC mass concentration measured during this period is taken as the background mass concentration, which is recorded as C0 and expressed in (mg/m3). When testing the background mass concentration, the cleaner to be tested shall be in an unpowered state;

c) Start the test procedures of the cleaner to be tested and start sampling at the same time. The sampling time is consistent with the background mass concentration test time. The TVOC mass concentration measured during this period is recorded as C1 and expressed in (mg/m3);

d) Test result. the test result is the TVOC mass concentration C1 generated by the cleaner minus the background TVOC mass concentration C

0.If there are multiple points, the maximum value of all points is taken as the final result.

6.1 Principles

6.1.1 Product marking for cleaners that are explicitly stated to have the antimicrobial, microbial reduction and cleaning functions should comply with the requirements of GB/T 21551.1.

6.1.2 The cleaners should explicitly state in the product marking or instructions for use that they have the functions and indicators specified in this document, as well as the cycle and methods of replacement, cleaning and regeneration, etc. of the materials or components and parts used.

6.2 Basic Requirements

6.2.1 Cleaners using the marking shall comply with the relevant hygiene and safety requirements in 4.1.

6.2.2 Cleaners that meet one or more of the requirements in

4.2 may use text descriptions, such as. "antimicrobia", "preventing mildew", "antiallergen", "antivirus", "microbial reduction", "allergen reduction", "virus reduction" and "deodorization" on product packaging box, nameplates and instructions for use, etc.

6.3 Contents The following contents shall be included in the marking or instructions for use of cleaners with the antimicrobial, preventing mildew, antiallergenic, antiviral, microbial reduction, allergen reduction, virus reduction and deodorization functions.

a) The categories of functions of the cleaners and the technical indicators they achieve [including test time, test chamber volume, special function programs or gears (if any)];

b) The names of the pollutants corresponding to the parameters shall be indicated;

c) The replacement cycle or cleaning method of the relevant antimicrobial, preventing mildew, antiallergenic, antiviral, microbial reduction, allergen reduction, virus reduction and deodorization materials or components and parts used;

d) The cleaners shall list the names of specific positions and components and parts that have the antimicrobial, preventing mildew, antiallergenic and antiviral functions;