GB/T 21551.4-2024 PDF English
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Antimicrobial and cleaning function of household and similar electrical appliances - Part 4: Particular requirements for refrigerator
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| GB 21551.4-2010 | English | 85 |
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Antibacterial and cleaning function for household and similar electrical appliances -- Particular requirements of refrigerator
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GB/T 21551.4-2024: Antimicrobial and cleaning function of household and similar electrical appliances - Part 4: Particular requirements for refrigerator
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.040.30
CCS Y 61
Replacing GB 21551.4-2010
Antimicrobial and Cleaning Function of Household and
Similar Electrical Appliances - Part 4.Particular
Requirements for Refrigerator
Issued on. DECEMBER 31, 2024
Implemented on. JANUARY 1, 2027
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 7
2 Normative References... 7
3 Terms and Definitions... 8
4 Technical Requirements... 8
5 Test Methods... 9
6 Marking and Instructions for Use... 11
Appendix A (normative) Test Method for Microbial Reduction... 12
Appendix B (normative) Test Method for Cleaning / Deodorization... 17
Bibliography... 19
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This is Part 4 of GB/T 21551 Antimicrobial and Cleaning Function of Household and Similar
Electrical Appliances. GB/T 21551 has issued the following parts.
---Part 1.General requirement;
---Part 2.Particular requirements for material;
---Part 3.Particular requirements for air cleaner;
---Part 4.Particular requirements for refrigerator;
---Part 5.Particular requirements for electric washing machine;
---Part 6.Particular requirements for air conditioner.
This document serves as a replacement for GB 21551.4-2010 Antibacterial and Cleaning
Function for Household and Similar Electrical Appliances - Particular Requirements of
Refrigerator. In comparison with GB 21551.4-2010, apart from structural adjustments and
editorial modifications, the main technical changes are as follows.
---The scope of application is modified (see Chapter 1; Chapter 1 of Version 2010);
---The terms and definitions of “cleaning”, “cleaning rate” and “deodorization rate” are
added, and the terms and definitions of “antibacterial”, “deodorization” and
“antibacterial materials” are deleted (see Chapter 3; Chapter 3 of Version 2010);
---The clause division of hazardous substance leakage in the “hygiene and safety
requirements” is modified (see 4.1.1; 4.4 of Version 2010);
---The “requirements for inhibition ring” and “requirements for microbial reduction” are
added (see 4.1.2 and 4.2.3);
---“general conditions”, “measurement instruments”, “test of inhibition ring” and “test of
microbial reduction” are added (see 5.1.1, 5.1.2, 5.2.1, 5.2.2 and 5.3.3);
---The “requirements for marking and instructions for use” are modified (see Chapter 6;
Chapter 6 of Version 2010);
---The “test method for microbial reduction” and “test method for cleaning / deodorization”
are added (see Appendix A and Appendix B).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by China National Light Industry Council.
This document shall be under the jurisdiction of National Technical Committee 46 on
Household Electrical Appliances of Standardization Administration of China (SAC/TC 46).
The drafting organizations of this document. China Household Electric Appliance Research
Institute (CHEARI); Haier Smart Home Co., Ltd.; Hefei WAHIN Co., Ltd.; Hisense Rongsheng
(Guangdong) Refrigerator Co., Ltd.; Changhong Meiling Co., Ltd.; Anhui CQC-CHEARI
Technology Co., Ltd.; Hefei Kinghome Electrical Co., Ltd.; BSH Home Appliances (China)
Co., Ltd.; Suzhou SAMSUNG Electronics Co., Ltd.; Panasonic R&D Center Suzhou Co., Ltd.;
TCL Home Appliances (Hefei) Co., Ltd.; Foshan Shunde District Freudenberg Apollo
Enviromental Protection Equipment Co., Ltd.; Shandong Xuesheng Electrical Appliance Co.,
Ltd.; CHEARI (Beijing) Certification & Testing Co., Ltd.
The main drafters of this document. Ma Dejun, Zhu Xiaobing, Li Yi, Zhang Yujia, Cao Shiliang,
Hu Zhiqiang, Zhou Weihong, Hu Haimei, Cai Ning, Zhang Qingling, Liu Jie, Qian Meishuang,
Liu Yuhua, Liu Jun, Zhang Xueying, Huang Dechuan, Zhong Yaowu, Xu Zhongjun, Li Yi.
The issuing of the previous versions.
---First issued in 2010 as GB 21551.4-2010;
---This is the first revision.
1 Scope
This document specifies the hygiene and safety, and functional requirements for refrigerators,
refrigerator-freezers and freezers for household and similar purposes with the antimicrobial,
microbial reduction and cleaning functions, as well as the marking requirements, and describes
the corresponding test methods.
This document applies to the production, inspection and sales of refrigerators, refrigerator-
freezers and freezers (hereinafter referred to as “refrigerators”) for household and similar
purposes that have one or more functions of antimicrobia, preventing mildew, microbial
reduction, cleaning / deodorization, etc.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB 4789.2 National Food Safety Standard - Microbiological Examination of Food. Aerobic
Plate Count
GB/T 8059 Household and Similar Refrigerating Appliances
GB/T 18883 Standards for Indoor Air Quality
GB 19489 Laboratories - General Requirements for Biosafety
GB/T 21551.1 Antimicrobial and Cleaning Function of Household and Similar Electrical
Appliances - Part 1.General Requirement
GB/T 21551.2 Antimicrobial and Cleaning Function of Household and Similar Electrical
Appliances - Part 2.Particular Requirements for Material
GB 44498 Household and Similar Electrical Appliances - Health Technical Specification
HJ 1042 Ambient Air and Waste Gas - Determination of Trimethylamine - Solvent Absorption
- Headspace/gas Chromatography
3 Terms and Definitions
The terms and definitions defined in GB/T 21551.1 and GB/T 8059, and the following are
applicable to this document.
3.1 cleaning
The process of reducing or removing the metabolites of microorganisms, such as. bacteria and
fungi, or volatile chemical gases (ethylene and TVOC, etc.) generated by stored objects inside
the refrigerator.
3.2 cleaning rate
The reduction in chemical gas concentration in the cleaning (3.1) test expressed as a percentage.
3.3 deodorization rate
In the deodorization test, the reduction in the concentration of chemical gases that cause
olfactory discomfort expressed as a percentage.
4 Technical Requirements
4.1 Hygiene and Safety Requirements
4.1.1 Hygiene and safety of the whole machine
When the refrigerator door is opened, the ultraviolet, ozone and other generation devices shall
stop working; if they cannot stop working, there shall be a description to remind that the use of
this product will generate ultraviolet or ozone.
4.1.2 Inhibition ring
The inhibition ring shall meet the requirements of GB/T 21551.1.
4.1.3 Hygiene toxicology
For refrigerators with materials that are explicitly stated to have the antimicrobial function or
components and parts containing antimicrobial materials, the toxicology shall comply with the
requirements of GB/T 21551.1.
4.2 Requirements for Antimicrobia, Microbial Reduction and Cleaning
4.2.1 Antimicrobia
The antimicrobial rate of refrigerator materials or components and parts that are explicitly stated
to have the antimicrobial function shall comply with the requirements of GB/T 21551.2.
4.2.2 Preventing mildew
For refrigerator materials or components parts that are explicitly stated to have the preventing
mildew function, the preventing mildew level shall comply with the requirements of GB/T 21551.2.
4.2.3 Microbial reduction
For refrigerators that are explicitly stated to have the microbial reduction function, the microbial
reduction state shall not be lower than 90.0%.
4.2.4 Cleaning / deodorization
For refrigerators that are explicitly stated to have the cleaning / deodorization function, the
cleaning rate / deodorization rate shall not be lower than 90.0%.
5 Test Methods
5.1 Test Conditions
5.1.2 Measurement instruments
The general measurement instruments for the test shall satisfy the following requirements.
5.2 Hygiene and Safety Test
5.2.1 Hygiene and safety test of the whole machine
5.2.2 Inhibition ring
In accordance with the method described in GB/T 21551.1, carry out the test.
5.2.3 Hygiene toxicology
In accordance with the method described in GB/T 21551.1, carry out the test.
5.3 Tests of Antimicrobia, Microbial Reduction and Cleaning
5.3.1 Antimicrobia
The antimicrobial rate is tested in accordance with the method described in GB/T 21551.2.
5.3.2 Preventing mildew
The preventing mildew level is tested in accordance with the method described in GB/T 21551.2.
5.3.3 Microbial reduction
In accordance with the method described in Appendix A, carry out the test.
5.3.4 Cleaning / deodorization
In accordance with the method described in Appendix B, carry out the test.
6 Marking and Instructions for Use
6.1 The marking of refrigerator products that are explicitly stated to have the antimicrobial,
preventing mildew, microbial reduction, cleaning / deodorization functions shall comply with
the requirements of GB/T 21551.1.
6.2 Refrigerator products that are explicitly stated to have the antimicrobial, preventing mildew,
microbial reduction, cleaning / deodorization functions shall indicate in the product instructions
that the products have the functions and indicators specified in this document, as well as the
cycle and methods of replacement, regeneration or cleaning of materials or components and parts.
6.3 Refrigerators that comply with the requirements of 4.2.1 and 4.2.2 shall indicate the
components and parts with corresponding antimicrobial or preventing mildew function (such
as. liner, shelves, fruit and vegetable box and door seal, etc.). Refrigerators that meet the
requirements of 4.2.3 shall indicate the main microbial reduction technology and functional
compartments used. Refrigerators that meet the requirements of 4.2.4 shall indicate the
corresponding pollutant names (such as. trimethylamine, methyl mercaptan and hydrogen
sulfide, etc.) and functional compartments.
Appendix A
(normative)
Test Method for Microbial Reduction
A.1 Test Principle
This method is to inoculate the test bacteria on the test carrier agar, respectively place it for a
certain period of time under two conditions. the refrigerator microbial reduction program is
turned on and turned off. Calculate the microbial reduction rate by the count of viable bacteria
remaining after the end.
A.2 Test Environment
The test shall adopt aseptic operation techniques, and the laboratory environment shall comply
with the requirements of GB 19489.
A.3 Test Bacteria, Materials, Instruments and Equipment
A.3.1 Test bacteria
The test bacteria are as follows.
A.3.2 Culture media and reagents
The culture media and reagents used during the test are as follows.
A.3.3 Instruments and equipment
The instruments and equipment used during the test are as follows.
A.4 Test Preparation
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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