GB/T 4706.21-2024Safety of household and similar electrical appliances - Part 21: Particular requirements for microwave ovens, including combination microwave ovens (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is Part 21 of GB/T 4706 "Safety of Household and Similar Electrical Appliances". GB/T 4706 has been published as follows part.

--- Part 1: General requirements;

--- Part 2: Particular requirements for electric irons;

--- Part 121: Particular requirements for professional ice cream machines.

This document replaces GB 4706.21-2008 "Safety of household and similar electrical appliances - Microwave ovens, including special requirements for combination microwave ovens" Compared with GB 4706.21-2008, in addition to editorial changes, the main technical changes are as follows.

--- Added "microwave ovens intended for use on board ships" and provided corresponding requirements and test methods (see Chapter 1, Appendix Record BB);

--- Changed the requirements in the scope and the requirements in the instructions for use (see Chapter 1, 7.12, Chapter 1, 7.12 of the 2008 edition);

--- Changed the description of the situations not considered in this document in the scope (see Chapter 1, Chapter 1 of the 2008 edition);

--- Changed the term "door monitoring interlock device" to "monitored door interlock device" (see 3.106, 3.106 of the 2008 edition);

--- Added requirements for moisture resistance of built-in microwave ovens (see 15.102, 15.103);

--- Changed the durability test method and requirements for microwave oven door systems (see Chapter 18, Chapter 18 of the 2008 edition);

--- Added an alternative test method for microwave leakage (see 19.101);

--- The note of 19.102 was transferred to the main text (see 19.102, 19.102 of the 2008 edition);

--- Changed the structural requirements of door interlocks and monitored door interlocks (see 22.103, 22.104, 2008 edition of 22.103, 22.104);

--- Added relevant structural requirements (see 22.117~22.121);

--- Added additional instructions for creepage distances and clearances for combined microwave ovens (see 29.2 and 29.3 of Appendix AA).

This document is equivalent to IEC 60335-2-25:2020 "Safety of Household and Similar Electrical Appliances Part 2-25.Microwave Ovens, including Particular requirements for combination microwave ovens.

The following minimal editorial changes were made to this document.

--- In order to enhance the coordination of the standard system, the name of the standard is changed to "Safety of Household and Similar Electrical Appliances Part 21: Microwave Particular requirements for ovens, including combination microwave ovens;

--- The footnote on the ISM band is changed to the note of 3.101.

Introduction

GB/T 4706 "Safety of Household and Similar Electrical Appliances" adopts most of IEC 60335.On this basis, GB/T 4706 refers to the structure of IEC 60335 is divided into several parts, consisting of general requirements and special requirements. Part 1 is general requirements, and the other parts are for products covered by special requirements, their safety requirements are general requirements used in combination with the special requirements.

The requirements include supplements and modifications to the corresponding clauses in the general requirements to provide complete requirements for each product.

This document is the protection requirements for electrical, mechanical, thermal, fire and radiation risks when the appliance is used normally in accordance with the instructions.

This document also covers abnormal conditions that may occur during use and considers how electromagnetic interference may affect the safe operation of the equipment.

This document has taken into account the requirements specified in GB/T 16895 "Low Voltage Electrical Installations". The appliance is connected to the power supply in accordance with the electrical wiring rules.

requirements are coordinated.

If multiple functions of an appliance involve other parts of GB/T 4706, the other parts shall apply to the appliance separately as long as it is reasonable.

Each function. If applicable, consider the impact of one function on other functions.

When no additional requirements are given in other parts for hazards already included in this document, GB/T 4706.1 applies.

GB/T 4706 is a standard covering appliance safety and takes precedence over general standards/horizontal standards covering the same subject.

This document is used in conjunction with GB/T 4706.1-2024 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements".

The part marked "applicable" in the document indicates that the corresponding clauses in GB/T 4706.1-2024 are applicable to this document; the part marked "replaces" in this document indicates that the corresponding clauses in GB/T 4706.1-2024 are applicable to this document.

For the parts marked as "added" in this document, in addition to complying with GB/T 4706.1-2024, the provisions in this document shall prevail.

In addition to the corresponding clauses, the clauses added in the clauses of this document must also be complied with; the part of this document marked "modified" means that in GB/T 4706.1-the relevant provisions of 2024 will be modified.

Safety of household and similar electrical appliances Part 21.

Microwave ovens, including special requirements for combination microwave ovens

1 Scope

This chapter of GB/T 4706.1-2024 is replaced by the following content.

This document specifies the safety requirements for microwave ovens for household and similar purposes.

This document applies to microwave ovens for household and similar purposes with a rated voltage not exceeding 250V.

This document also applies to combination microwave ovens. For specific requirements, see Appendix AA.

This document also applies to microwave ovens intended for use on board ships. Specific requirements are given in Appendix BB.

This document also applies to appliances which are not intended for normal household use but which may still cause a hazard to the public, e.g.

However, if the appliance is intended for use by professionals for the processing of food for commercial purposes, then the appliance Appliances are not considered to be for household and similar purposes only.

As far as is practical, the common hazards present in the various appliances covered by this document are those that are present in the home and surrounding environment to which all persons are exposed.

However, in general, this document does not consider.

---The following groups (including children).

- due to a physical, sensory or mental impairment, or - Due to lack of experience and knowledge, Circumstances that render them unable to use the equipment safely without supervision or instruction;

--- Condition of children's play equipment.

Note 101.Note the following facts.

--- For equipment intended for use in vehicles, ships or aircraft, additional requirements may be required;

--- National authorities may impose additional requirements on equipment.

Note 102.This document does not apply to.

--- Commercial microwave ovens (GB/T 4706.90);

--- Industrial microwave heating equipment (GB 5959.6);

--- Medical instruments (GB 9706);

--- Appliances intended for use in special environments, such as those where corrosive or explosive gases (dust, steam or methane) are present.

2 Normative references

Except for the following contents, this chapter of GB/T 4706.1-2024 applies.

Increase.

GB/T 4706.14 Safety of household and similar electrical appliances Part 14: Grills, bread toasters and similar portable appliances Particular requirements for cooking utensils (GB/T 4706.14-2024, IEC 60335-2-9:2019, IDT) GB/T 4706.22-2024 Safety of household and similar electrical appliances Part 22: Stationary ovens, cooktops, ovens and similar Particular requirements for similar purpose appliances (IEC 60335-2-6:2018, IDT) IEC 60068-2-6 Environmental testing-Part 2: Test Test Fc. Vibration (sinusoidal) Tests-TestFc.Vibration(sinusoidal)] Note. GB/T 2423.10-2019 Environmental testing Part 2: Test methods Test Fc. Vibration (sinusoidal) (IEC 60068-2-6:2007, IDT) IEC 60068-2-27 Environmental testing Part 2-27.Test Ea and guidance. Shock