Study on Control of Indoor Air Pollution caused by Carpets

虽然过敏性哮喘的主要原因被认为是屋尘螨和地毯上的真菌，但其工程措施还不够发达。去年，（1）文献调查，（2）地毯中灰尘定量的基本方法，（3）地毯内部灰尘行为的观察。今年的研究主要集中在地毯的除尘，其特点和估计。研制了一种实用的除尘装置，对真实的地毯进行了定量除尘，测定了其性能，并确定了最佳材料、结构和抽吸速度。在将测试粉尘喷洒在测试地毯上之后，用该装置抽真空以测定粉尘，并测定滤袋的重量增加。作为试验地毯，使用簇绒长度为5mm的聚酯中密度地毯和簇绒长度为7mm的高密度地毯。在新地毯上，直接施加2克测试粉尘#7，并沿测试材料上绘制的网格沿着取样，并从每个地毯抽真空10次，用电子天平测定重量增加。根据这些结果，获得了估计真空吸尘后地毯中残留灰尘量的方程和特征值。用吸尘器清除地毯上的灰尘几乎是不可能的。

Although the major cause of the allergic asthma is considered to be the house-dust-mite and the fungi, which are, generated from the carpet, its engineering measures are sot enough developed. Last year, (1) literature survey, (2) basic method of quantification of dust in the carpet, and (3) observation of dust behavior inside of the carpets were made. This year, research was made mainly on the removal of dust from the carpet, its characteristics and the estimation. The practical removal apparatus, which quantify the removal of dust from the real carpet, was developed and its characteristics were determined and the optimum material, structure, and suction rate were obtained. After spraying the test dust on the test carpet, dust was vacuumed with the apparatus to determine and the weight increase of the filter bags was determined. As test carpet, polyester medium density carpet with tuft length of 5 mm and those high densities with 7-mm tuft length were used. On the new carpet, 2 grams of test dust #7 was applied directly and sampled along the grids drawn on the test material and vacuumed 10 times from each carpet and weight increase was determined with electronic balance. From these results, an equation which estimates the remaining dust quantity in the carpet after vacuuming and characteristic values were obtained. It is almost impossible to remove dust from the carpet by vacuuming.