Detail of GB/T 21551.4-2024

Introduction of GB/T 21551.4-2024

GB/T 21551.4-2024 Antimicrobial and cleaning function of household and similar electrical appliances - Part 4: Particular requirements for refrigerator 1 Scope This document specifies hygienic safety and functional requirements, as well as marking requirements, for household and similar refrigerators, refrigerator-freezers, and freezers with antimicrobial, bactericidal and cleaning functions and describes the corresponding test methods. This document is applicable to the production, inspection and sales of household and similar refrigerators, refrigerator-freezers, and freezers that have one or more functions, e.g., antimicrobial, mold prevention, bactericidal, cleaning/deodorization (hereinafter referred to as “refrigerators”) . 2 Normative references The following normative documents contain provisions 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 4789.2 National food safety standard - Food microbiological examination - 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 For the purposes of this document, the terms and definitions given in GB 21551.1, GB/T 8059 and the following apply. 3.1 cleaning process of reducing or removing microbial metabolites such as bacteria and fungi and the volatile chemical gases (ethylene, TVOC, etc.) produced by stored items inside the refrigerator 3.2 cleaning rate value of the reduced chemical gas concentration expressed as a percentage in the cleaning (3.1) test 3.3 deodorization rate value of the reduced concentration of chemical gases causing olfactory discomfort expressed as a percentage in the deodorization test 4 Technical requirements 4.1 Hygienic safety requirements 4.1.1 Hygienic safety of the overall machine When the refrigerator door is opened, ultraviolet ray, ozone and other generating devices shall stop working; if they cannot stop working, a description indicating that the use of the product will generate ultraviolet ray or ozone shall be provided. Harmful substances produced by the refrigerator itself with antimicrobial, mold prevention, bactericidal, cleaning/deodorization devices shall meet the requirements of Table 1.

Contents of GB/T 21551.4-2024

Foreword i Introduction iii 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Test methods 6 Marking and instructions for use Annex A (Normative) Bactericidal test method Annex B (Normative) Cleaning/deodorization test method Bibliography