平行气流真菌孢子释放强度测定装置的开发

Development of parallel air flow fungal spore source release strength tester

建筑材料表面真菌孢子的释放和气溶胶的形成,是研究室内空气微生物气溶胶暴露及其对人体危害的关键因素.针对平行气流激发真菌孢子气溶胶化过程这一实际中更普遍的情况,开发平行气流真菌孢子释放强度测定装置(PAFST),给出装置设计时遵循的原则:超净气流、流量平衡、压力平衡和仪器匹配原则;测量室内和空调系统中5种典型风速下,柑桔青霉(pencillium citrinum)的释放强度,其表现出很好的规律性:风速为0.3m/s时,孢子释放强度为1个/cm2,风速为9.4m/s时,为1407个/cm2.结果表明,开发的PAFST装置可以有效地测定真菌孢子在平行气流作用下的释放强度,可用于在平行气流作用情况下真菌孢子释放强度的研究.

The release and aerosolization of the fungal spore on the surface of building materials are the key factors to investigate the bioaerosol exposure and harmful effects on human health. For the common situation of parallel air flow fungal spore aerosolization, the parallel air flow fungal spore source strength tester（PAFST） has been developed. The ultra clean air- flow, the mass flow conservation, the pressure equilibrium and the instrument matching were provided and considered in the design. The release strength of the pencillium citrinum was tested under 5 typical indoor and air - conditioning velocities. Results indicate that the release strength of pencillium citrinum is 1 spores/cm^2 at the velocity of 0. 3 m/s and 1407 spores/cm^2 at the velocity of 9.4 m/s, It means that the developed set - up PAFST can test the release strength of the fungal spore effectively in the condition of parallel air flow and can be used to investigate the fungi release strength and aerosolizetion in the condition of parallel air flow.