电气和电子设备的机械结构.符合IEC 60297和IEC 60917系列的机柜热管理.第6部分:室内机柜的空气再循环和旁路

[中文适用范围]： 本标准部分处理符合IEC 60297和IEC 60917系列标准的机柜的热管理，提供了兼容的循环风和旁路流量测量方法，这些是定义强制风冷中气流质量的指标，可普遍应用于安装子架和/或机箱式设备的室内机柜。本文档包含以下内容：a) 定义机柜冷却中的循环风和旁路流量；b) 循环比RC的等级；c) 定义安装在机柜中的强制风冷子架和/或机箱式设备的循环比RCs的公式；d) 定义整个机柜的循环比RCr和旁路率BPr的公式；e) 计算循环比RCs、RCr和旁路比BPr所需的各温度测量方法的要求。本文档包括旁路比测量的定义，但不包括旁路比等级的定义。所绘制的图纸不用于指示产品设计，仅用于定义强制风冷气流的说明性指示。本文档处理的循环和旁路测量方法假设应用于安装在室内的机柜。冷却空气入口位于机柜的前部或底部，加热空气从后部或顶部排出。这些方法也适用于安装在室外且在前部或后部具有冷却装置（如热交换器或空调）的机柜（见附录C）。子架或机柜的循环比定义为安装在机柜中的每个单独子架或机箱式设备的循环比，或整个机柜的循环比。机柜的旁路比定义为整个机柜的旁路比。 [外文原描述]： IEC 62610-6:2020 deals with thermal management for cabinets in accordance with IEC 60297 and IEC 60917 series, provides compatible measurement methods of recirculation ratio and bypass ratio which are indicators for defining quality of airflow in the forced air cooling that can be commonly applied to indoor cabinets for mounting subrack and/or chassis-based equipment. This document contains the following: a) the definition of recirculation and bypass flow rates in the cooling of the cabinet, b) the levels of the recirculation ratio RC, c) the definition of the formula for the recirculation ratio RCs of forced air cooling subrack and/or chassis-based equipment installed in the cabinet, d) the definition formula of recirculation ratio RCr and bypass rate BPr of the entire cabinet, e) the requirements of the measuring method of each temperature necessary for calculating the recirculation ratio RCs, RCr and bypass ratio BPr. The purpose of this document is to provide: • for the equipment integrator and development designer of the cabinet the criteria for efficiently and correctly determining the specification, and • for the supplier of the cabinet the measuring and classifying method for the airflow recirculation rate of the subrack and/or chassis-based equipment installed in the cabinet.