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[目的 ]了解监测中采样时间及高度对客房 CO2 监测结果的影响。 [方法 ]选择标准客房 ,在距地面不同的高度和不同时间测定。 [结果 ]随着客人的进入 ,CO2 浓度不断上升 ,开始时上升较快 ,随后逐渐减缓 ,2 0 min后趋于稳定。采样高度相临两组之间差别有显著性 ,在 1.0 m处 CO2 浓度最高 ,其上下逐渐降低。 [结论 ]监测空客房不能反映住人后的实际情况。日常监测中采样高度 1.0 m可反映客房中 CO2 的最高浓度值。进行卫生学评价时 ,宜多个采样高度 ,结果较合理。
[Objective] To understand the effect of sampling time and height in monitoring on CO2 monitoring results in guest rooms. [Method] Select standard rooms, measured at different heights and different times from the ground. [Result] With the entry of guests, the concentration of CO2 increased continuously and began to rise rapidly, then gradually decreased, and stabilized after 20 min. There was a significant difference between the two sampling heights, with the highest CO2 concentration at 1.0 m and a gradually decreasing upper and lower level. [Conclusion] The monitoring of empty rooms can not reflect the actual situation after living. The sampling height of 1.0 m in daily monitoring reflects the highest concentration of CO2 in the room. Hygienic evaluation should be more than one sampling height, the result is more reasonable.