民用建筑气密性对室内污染物浓度影响的研究

Research on the Impact of Civil Building Air Tightness to Indoor Pollutant Concentrations

针对民用建筑气密性对室内污染物浓度的影响问题,通过试验进行了研究和讨论。研究结果表明,房间空气换气率对房间内的甲醛浓度有重要影响,当换气率小于0.5次/h(相当于气密性3～4级水平)时,房间内甲醛浓度维持在比较高的水平;当换气率大于0.5次/h时,房间内甲醛浓度急剧下降,并维持在比较低的水平。为控制室内污染物的浓度,保持室内换气率在0.5次/h以上很有必要。

Aiming against civil building the impact of civil building air tightness to indoor pollutant concentrations, research and discussion has been made through the test. Results shows that, the ventalation rate has a strong affection on formaldehyde concentration, when the rate is lower than 0.5 times/h（ equal to 3-4 grade air tightness ）, the formaldehyde concentration keeps in a higher level; when the rate is higher than 0.5 times/h, the formaldehyde concentration would sudden drop, and stills in a lower level. To control the concentration of indoor pollutant, it is necessary to keep the ventalation rate higher than 0.5 times/h.