家用和类似用途电器.空气传播噪声测定的试验规范.第2-7部分:风扇的特殊要求

[中文适用范围]： 本文件适用于家用和类似用途的电风扇（包括其附件和部件），设计用于交流或直流电源。电机、叶轮及其外壳（如有）构成一个整体单元。这些特定要求适用于：常规风扇、台扇、立式风扇、吊扇、无叶风扇、壁挂式风扇、吊挂式风扇、百叶风扇、塔式风扇、通风和隔断通风风扇。本标准不适用于：作为通风系统一部分的风扇、专门为工业用途设计的风扇、作为电器一部分的风扇（例如冷却风扇）、具有附加功能的风扇（例如加热、加湿）。本测试规范的使用限制在IEC 60704-1的范围内给出。 [外文原描述]： IEC 60704-2-7:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60704-2-7:2020 applies to electrical fans (including their accessories and their component parts) for household and similar use, designed for AC or DC supply. The motor, the impeller and their housing, if any, form a single unit. These particular requirements apply to: – conventional fans, – table fans, – pedestal fans, – ceiling fans, – bladeless fans, – wall bracket fans, – ceiling bracket fans, – louver fans, – tower fans, – ventilating and partition ventilating fans. This standard does not apply to: – fans that are part of a ventilation system, – fans designed exclusively for industrial purposes, – fans that are part of an appliance (for example cooling fans), – fans with additional functions (for example heating, humidifying). Limitations for the use of this test code are given in the scope of IEC 60704-1. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision. This edition includes the following significant changes with respect to the previous edition: a) it includes additional fan categories as defined in IEC 60879:2019 and IEC 60665:2018; b) it includes standard deviations of sound power levels in 1.3; c) a comparison method has been added; d) the normative references have been updated (ISO 3744:2010 and ISO 3743-1:2010); e) it has been adjusted with regard to IEC 60704-1:2010. This International Standard is to be used in conjunction with IEC 60704 1:2010, Household and similar electrical appliances – Test code for the determination of airborne acoustical noise – Part 1: General requirements. This Part 2-7 supplements or modifies the corresponding clauses in IEC 60704-1:2010, so as to establish the test code for fans.