GB XXXX – 20XX  
 ICS  03.080.01 
Y60 
 
 
 
 
 
 
National Standard of the Peoples’ 
Republic of China  
 
 
GB  XXXX -20XX  
 
 
 
 
 
 
Antibacterial and Cleaning Functions of  
Household and Similar Electrical 
Appliances  
Particular Requirements for Air Cleaners  
 
 
 
(Report for approval)  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Issued on ××-××-20××  Implemented from ××-××-20××  
 
Issued by  
the General Administration of Quality Supervision, Inspection, and Quarantine  
and 
The State Standardization Administration Committee of the People's Republic of ChinaGB XXXX – 20XX  
 
 
 
Contents  
 
Introduction  II 
1 Scope  1 
2 Regulatory references  1 
3 Terms and definitions  1  
4 Requirements for sanitation and functions  1  
5. Inspection methods  2 
6. Labels  2  
Appendix A ( regulatory)  Antibacterial ( cleaning ) function evaluation 
of air cleaner  3     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 GB XXXX – 20XX  
 
 
 
 
 
 
 
 
Introduction  
 
 
 
All of the technical contents of this section are mandatory.  
GB 21551.1 -2008 “General Requirement s for Antibacterial and Cleaning 
Functions for Household and Similar Electrical Appliances ” comprises several 
sections , including Section 1 for general requirements and other sections for 
special requirements.  
This section is section xx of GB 21551. This section should be used in 
conjunction with GB 21551.1 -2008 “General Requirement for Antibacter ial and 
Cleaning Functions for Household and Similar Electrical Appliances ”. 
Appendix A of this section is a regulatory appendix.    
This section was proposed by the China  National Light Industry Association.  
This section is under the centralized managemen t of the Household Electric 
Appliances of National Technical Committee  (SAC/TC46 ). 
Drafting unit for this section : 
Main drafters for this section :  
This section is being issued for the first time.   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 GB XXXX – 20XX  
Antibacterial and cleaning function s of household and similar 
electrical appliances  
 
Particular requirements for air cleaner s 
 
 
1 Scope  
 
This section specifies the sanitary requirements, inspection method s and 
markings for indoor air cleaner s (hereinafter referred to as air  cleaner s) in terms 
of their antibacterial and cleaning  functions.  
This method is applicable to household and similar air cleaners with cleaning  
function s. 
 
2 Regulatory references   
 
This section incorporates provisions referred to in the following documen ts. No 
dated references and all their subsequent revisions (excluding any corrigenda) or 
revised editions shall be appli cable  to this section . However, parties to an 
agreement reached according to this section are encouraged to discuss the 
possibility of u sing the latest version of these references. The latest edition of 
any undated references  shall be applied to this section . 
GB/T18801   Air cleaner s 
GB/T 18883 -2002  Indoor air quality standard    
GB XXXXX -XXXX  General requirement s or antibacterial and cleani ng function s 
of household and similar electrical appliances  
WS/T 206   Methods for the Determination of Inhalable Particulates in Air 
in Public Places “Technical Standard for Disinfection"  
 (Ministry of Public Health, 2002  edition ) 
 
3   Terms and definitio ns  
The following terms and definitions are used in this section . 
 
3.1 Antibacterial and clearing air cleaner  
A device in a container that can significantly reduce the concentration of 
particulate matter, gaseous contaminant s or microorganism s in the air p assing 
through a filter using a specific technique or method (such as a filter, adsorption 
or degradation)  
 
 
3.2 Total volatile organic compounds - TVOC  
Tenax GC or Tenax TA, analysed with a nonpolar chromatographic column 
(index of polarity <10) whose retention time rang es between that of n -hexane 
and n -hexadecane.   
 
3.3 Inhalable Particulates  PM10  
Particles suspended in air with an aerodynamic equivalent diameter 10 micron . 
 
4 Sanitary and functional requirements  GB XXXX – 20XX  
 
4.1 Sanitation and safety   
 
 
4.1.1 The air cleaner must meet the requirements of GB XXXXX -XXXX “ General 
Requirements for Antibacterial  and Cleaning Functions for Households and 
Similar Electrical Appliances ” in terms of sanitation and safety.   
 
4.1.2 H armful substance s produced by the air cleaner itself must conform to the 
requirements listed in Table 1.  
 
Table 1 . Requirements of the h armful substance produced by air cleaner  
 
Harmful factors  Control index  
Ozone concentration (5cm from outlet)  0.10 mg/m3 
Ultraviolet  intensity (30cm from the 
periphery of the device)  5 µw/cm2 
TVOC concentration ( 20cm from outlet)  0.15 mg/m3 
PM10 co ncentration (20 cm from outlet)  0.07 mg/m3 
 
 
4.2 Functions  
 
4.2.1 The clear ance  function of the air cleaner must meet the following requirements:  
After operating for 1 hour at a simulated site and under site test conditions, the 
antibacterial (clear ance ) rate of the air cleaner should be 50%.  
 
4.2.2 The antibacterial performance of the air cleaner should meet the relevant 
requirements of “Antibacterial and Cleaning Functions of Household and Similar 
Electrical Appliances - Particular Requirements for Ant ibacterial M aterials".  
 
4.2.3 The cleaning materials of the air cleaner must be able to be replaced and 
regenerated , and the cleaning device must be able to be cleaned and sterili sed. 
 
5 Inspection method  
 
5.1 Sanitary and safety inspection    
 
5.1.1  When the harmful factors produced by the air cleaner are inspected, the 
laboratory measurement value of the concentration of harmful factors minus the 
background concentration of the laboratory shall be considered as the inspection 
result.  
 
5.1.2 The ozone con centration at the air outlet of the air cleaner shall be 
inspected in accord ance with  GB/T 18883, Appendix A, Ultraviolet 
Spectrophotometry.  
 
5.1.3 The ultraviolet leakage intensity of the air cleaner shall be inspected in GB XXXX – 20XX  
accord ance with  the stipulations of GB18258.  
 
5.1.4 The GB/T18883, Appendix C, Thermal decomposition/capillary gas 
chromatography.  
 
 
5.1.5 The particle concentration light scattering method specified in WS/T 206.  
 
5.2 Functional inspection  
For the inspection method for the antibacterial function s of the air cleaner, see 
Appendix A.   
 
6 Labels  
 
6.1 Labe lling principle s 
 
6.1.1 The air cleaner must meet the requirements of GB XXXXX -XXXX “General 
Requirements for  Antibacterial and Cleaning Functions for Household and Similar 
Electrical Appliances ”, Chapter 5.  
 
6.1.2 The operating instruction s of the air cleane r must provide a functional index 
of the product and the replacement and regeneration intervals and method s for 
cleaning materials as specified in this section . 
 
6.2 Application of antibacterial (clearing) air cleaning function labels  
 
6.2.1 The labels use d on the air cleaner must conform to the relevant 
requirements for sanitation and safety described in 4.1 of this section . 
 
6.2.2 Air cleaner s conforming to 4.2.2 of this section must have an “Antibacterial 
(cleaning )” label on the packing box and data pan el of the product.  
 
 
 
 GB XXXX – 20XX  
 
Appendix A  
(regulatory)  
Evaluation of a ntibacterial and clearing function of air cleaner  
  
 
A.1 Scope   
The regulation specifies the method for evaluating the antibacterial function of the 
air cleaner . 
 
A. 2 Test principle   
The in itial value and end value of the colony count of a control group and a test 
group in a given time are measured and the antibacterial and clea ning rate of the 
air cleaner is calculated according to the following formulas : 
 
 
Initial colony count of control group – End colony count of control group  Natural extinction rate (%) =  Initial colony count of control group  x 100 % 
 
 
Initial colony count of test group (1 natural extinction rate) – end colony count of  test group  Antibacterial (clearing) rate (%) =  Initial colony count of test group (1 - natural extinction rate)  x 100 % 
 
 
 
A .3 Simulated site test  
 
A.3.1 Simulated test cabin  
a) Environmental temperature of test cabin: 20°C~25°C, relative humidity: 
50 - 70% RH.   
b) Structural requirements of te st cabin: A pair of aerosol cabins is  used . 
These two cabins are adjacent to each other and their environment 
(inclusive of temperature, humidity, cleanliness , illumination, tightness and 
ventilation conditions) is identical and kept stable during the test.  In terms 
of the design and structure of the cabins, it should be ensured that the 
microbial aerosol in the cabins cannot leak out and the materials used must 
be corrosion -resistant and easy to clean.  
— Capacity  of test cabin:  (3.5m  X 3.4m  X 2.5m  = 30m3 ); 
— Structure of enclosure (including wall surface s, ceiling and floor): 
materials with low or no pollution levels and low adsorption rate s such 
as stainless steel, polytetrafluoroethylene and tempered glass should 
be used ; 
— Sealing and joint filling mat erials: silicon rubber and glass sealant;  
— Air stirring apparatus: ventilator;  
— Air circulatory system: An independent air  circulatory system must be 
provided , and the cleanliness  of the cabin shall be in excess of over 
10,000 degree s after filtering and  cleaning . Before starting the test, the 
test cabin must be completely closed using automatic control valves 
and the operation room outside of the cabin must be kept at a positive 
pressure to avoid any leak of microbial aerosol.     GB XXXX – 20XX  
 
A.3.2 Strain s, materia ls, apparatus and equipment  
 
A.3.2.1  Test bacteria   
Bacteria for test: Staphylococcus albsp 8032 or other applicable non -invasive 
organisms.  
 
 
A.3.2.2  Materials  
Nutrient agar culture media or other applicable culture media.  
 
A.3.2.3  Apparatus and equipme nt 
Impact air microorganism sampler: airborne bacteria catch ment  rate > 95%;  
Spray infecti on apparatus (aerosol sprayer): the diameter of 90% of sprayed 
aerosol particles should be < 10m; 
High pressure steam sterili ser 
Constant temperature incubator  
Dry he at sterili ser 
Freezer  
Thermometer  
 
A.3.3  Test preparation  
 
A.3.3.1  Preparation of nutrient agar culture media  
Beef extract  5.0g 
Peptone  10.0g  
Sodium chloride  5.0g 
Agar  15.0g  
 
Preparation method: Remove the agar and place the other components into 
distill ed water, and once the pH value ha s been adjusted up to 7.2.0 ~7.4 with 
0.1mol/L NaOH solution, add the agar and heat again ; the solution should be 
separately loaded and sterili sed in a pressure steriliser for 20min at a 
temperature of 121 °C. 
 
A.3.3.2  Prepa ration of nutrient agar plate  
The nutrient agar plate must be prepared in accord ance with  the operating 
instruction s of the sampler.  
 
A.3.3.3  Preparation of bacterial suspensions  
Staphylococcus albus suspensions must be prepared  in accord ance with 
“Techni cal Standard for Disinfection ” (2002  edition ), 2.1.1.2.  
 
A.3.3.4  Installation of test group prototype  
The prototype must be installed at the remote end of the test cabin in accord ance  
with the installation instruction s of the prototype for test ing.  
 
A.3.3 .5 Installation of blank control group prototype  
A product of a model and batch similar to that of the prototype  must be installed , 
and the components and parts with antibacterial and sterili sation function s GB XXXX – 20XX  
removed or set to a non -working state.  
 
A.3.4  Test steps    
 
A.3.4.1  Sterili sation : Sterilis e the appliances to be used in the test.  
 
A.3.4.2  Sterilis e the air in the a erosol cabin with a high efficien cy filter to ensure 
that its cleanliness  is no lower than class 7 (10,000 degrees).  
 
A.3.4.3 Adjust th e temperature and relative humidity of the a erosol cabin, and 
after maintaining this at a stable level for a certain time (to ensure that the 
temperature and relative humidity remain relatively constant during the test) , 
completely close the cabin and do not open  again for the duration of the test.  
 
A.3.4.4 Open the blast device of the operation room to send circulating air 
through a high efficien cy filter to the operation room to maintain the air in the 
room at a positive pressure (15 - 30Pa ), so as to av oid any leakage of microbial 
aerosol in the cabin.  
 
A.3.4.5 Take some test bacterial suspension and dilute it with nutrient broth 
culture media to the required concentration. Then, spray and infect the 
suspension at the pressure, flow and spraying time set  for the spray infecting 
apparatus and stir with an air agitation unit (such as a fan) at the same time.  
After spraying  the infection, the suspension should be continuously stirred for 
10min and the n kept still for 15min.  
 
A.3.4.6 Before operation, the ba cterial concentration in the a erosol room s for the  
test group and control group should be sampled over a period of 1 - 5min. When 
the samples are taken, the sampling head should be turned upward. During the 
test, the positive control bacterial count should  be 5.0 X 104cfu/m3 - 5.0 X 
105cfu/m3 otherwise  the test result shall be invalid.  
 
A.3.4.7  Operate the test prototype at its highest antibacterial speed as specified 
by the manufacturer (subject to the maximum wind speed and air -outlet state if 
not specifi ed by the manufacturer ). For air conditioning products, the test shall be 
conducted according to the air blast state.  
 
A.3.4.8  The test time shall be calculated according to the following formula (A.1):   
 
 
               
 
-------  (A.1)  
 
 
Where:  
 
T — Test time  (h) 
N — Power of air conditioner or cleaner  (W) 
V — volume of a erosol room  (m3) , (V=10m3 ~40m3) ; 
 GB XXXX – 20XX  
 
Note: The test time shall not be less than 15min nor exceed 2 hours. 2  - 3 
sampling times may be set according to the sampling  period .  
 
 
A.3.4.9 After the test prototype has run for the specified  time , the bacterial 
concentration in the a erosol room of the test and control group s must be 
simultaneously sampled over a period of 1 - 5min. When samples are taken, the 
sampling head must be turned upward. During the course of sampling, the 
prototype should stop running.  
 
A.3.4.10 At room temperature, the nutrient pl ate sampled should be immediately 
placed in a incubator of 36°C±1°C to culture for 24 - 48 hours, and the grown 
bacterial colony then counted and convert ed to cfu/m3 according to the following 
formula (A.2):  
 
 Total bacterial colony on sampling plate (cfu) Content of bacteria in the air (cfu / m3) = -------------------------------------------------------------------   x 1000  
 Sampling flow (L / min) x  sampling time (min)   
       ……….…… (A.2)  
   
 
1 - 2 sets of the unused culture media cultured in the same batch should be 
taken and cultured simultaneously with the specimens sampled for the test as a 
negative control.  The negative control group should have no bacteri al grow th; 
otherwise the test shall be invalid as this indicates that the culture media have 
been contaminated ; the test should then be conducted once again with new , 
uncontaminated  cultur ed media.  
 
A.3.4.11 After completion of the test, the air in the aerosol cabin should be finally 
sterilis ed with a UV lamp for 1  - 2 hours and a n exhauster then switched on to 
start filtering and s terilis ation.  
 
A.3.4.12 The test should be repeated 3 times  (at a  minimum  interval of 1 day) 
and the respective antibacterial ra te calculated  (the mathematical mean of the 
three test results should be taken as the final test result).  
 
A.3.5 Test data processing  
 
The antibacterial (clearing) rate is calculated acco rding to the following formula 
(A.3):  
 
 
 
 
………………….. (A.3)  
 
 
Where:  
 
Kt — Antibacterial (cleaning ) rate of air conditioner or cleaner  (%); 
 GB XXXX – 20XX  
V1, V2 — Bacterial air c ontent at different times respectively before and after 
the test for the test group (cfu/m3) ; 
Nt — The natural decay rate of bacteria in the air for the control group. See 
the formula below (A.4):  
 
 
 
 
 
 
…………………….  (A.4)  
 
 
 
Where:  
V0, Vt - Bacteria l air content at different times respectively before and after the 
test for the control group (cfu/m 3).