空气净化器工程实践应用相关问题——关于空气净化器几个问题的探讨（4）
Engineering application related issues of air cleaners—Discussion on several problems about air cleaners (4)
摘要：
对室内使用空气净化器时所普遍关心的空气净化器能承受的大气污染及室内能达到的浓度水平等问题进行了探讨，给出了简明的计算方法。认为室内正常发尘量远小于缝隙渗入的尘量，计算时可忽略。指出新风比为0.1～0.3时，引入新风的空气净化器可以阻挡室外尘粒通过缝隙入侵、降低室内浓度，与仅提高内置过滤装置效率或当量换气次数的无新风的空气净化器相比，在控制室内污染方面更有效。在计重效率η=0.95时，当量换气次数n不应小于6 h-1，宜达到8 h-1，此时室内浓度达到初始浓度的1/6所需的时间接近1 h。
Abstract：
Discusses the issues of the air pollution that air cleaners can bear and the indoor concentration level that can be achieved, which are generally concerned with the use of air cleaners in rooms, and gives a simple calculation method. Considers that the normal indoor dust is much smaller than the infiltrated dust from the gaps, which can be ignored in calculation. When outdoor air ratio ranges from 0.1 to 0.3, the air cleaner with outdoor air supply can resist the invasion from gaps, which reduces the indoor particle concentration. Comparing with improving the filter efficiency or the equivalent air change rate of the air cleaner without outdoor air, the air cleaner with outdoor air can effectively control indoor pollution. When the weight efficiency is equal to 0.95, the equivalent air change rate should not be less than 6 h-1 and reach 8 h-1, and the time required for the indoor concentration reaching 1/6 of the initial concentration is close to 1 h.
Keywords:air cleaner, stable concentration, outdoor air rate, air change rate, filter efficiency