ABSTRACT A series of experiments were carried out in a full-scaled model room to verify the characteristics of the air-conditioning system with ceiling induction diffusers. By the step-up tracer gas method and decay method, 10 cases with three varying parameters (the positions of exhausts, the heights of the exhaust ports and the states of the curtains around the beds) were designed to examine the influence on the indoor environment. It can be found that the exhaust ports had obvious influence on the normalised concentration distributions. The curtains made the indoor temperature higher than that of in without curtains and prevent the contaminant escaping out when in patients breathed. In terms of the local mean age of air, the ventilation efficiency presented an optimum result on a specific position of the exhaust port. However, there was minor influence on the air age caused by the height of the exhaust ports.

中文翻译：

---

冷风送风条件下天花板感应散流器对病房室内环境质量的影响

摘要 在全尺寸样板房中进行了一系列实验，以验证带有天花板感应扩散器的空调系统的特性。通过升压示踪气体法和衰减法，设计了10个具有3个不同参数（排气口位置、排气口高度和床周围窗帘状态）的案例来考察对室内环境的影响. 可以发现，排气口对归一化浓度分布有明显影响。窗帘使室内温度高于不使用窗帘时的室内温度，防止患者呼吸时污染物逸出。就空气的局部平均年龄而言，通风效率在排气口的特定位置呈现最佳结果。然而，