平行气流真菌孢子释放强度测定装置的开发

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 citri-num was tested under 5 typical indoor and air-conditioning velocities. Results indicate that the release strength of pencillium citrinum is 1 spores/cm at the velocity of 0.3 m/s and 1407 spores/cm 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 aerosoli-zetion in the condition of parallel air flow.