空气净化器环境测试舱自然衰减影响因素——关于空气净化器几个问题的探讨（3）
Natural attenuation of air cleaners in environmental test chamber and its influencing factors —Discussion on several problems about air cleaners (3)
摘要：
探讨了空气净化器在环境测试舱中的自然衰减及影响因素，结合实际检测数据进行了对比分析。指出环境测试舱中的自然衰减包括凝并损失（约1.2%）、沉积损失（在水平面上，约0.61%）、扩散损失（在竖直面上，约0.76%）三部分，合计约2.6%。认为环境测试舱中空气净化器可不做自然衰减测试，以本底浓度代之；可以取消循环风扇，以可调风量的小风机置于试验样机处代之。
Abstract：
Discusses the natural attenuation and influencing factors of air cleaners in an environmental test chamber, and compares with the actual test data. Points out that the natural attenuation in the environmental test chamber consists of three main parts: the coagulation loss (about 1.2%), the deposition loss at horizontal surface (about 0.61%) and the diffusion loss at vertical surface (about 0.76%). The total natural attenuation is about 2.6%. Considers that the natural attenuation test is not needed for air cleaner in the environmental test chamber, which can be replaced by the background concentration; and that the circulating fan can be cancelled, which can be replaced by small adjustable air volume fan placed in the test prototype.
Keywords:air cleaner, environmental test chamber, natural attenuation, coagulation loss, deposition loss, diffusion loss
