Particle size distribution of new type nanomist humidifier

This study was designed to investigate the particle size distribution of a new type nanomist humidifier. The measurement of particle size was performed inside storage chamber at 5⁰C and 15°C by means of using a scanning mobility particle sizer and a light-scattering spectrometer. The nanomist generator was set to operate at frequencies of 3500,4000,4500 and 4750 rpm. Size distributions were measured at different points along a straight line extending from the outlet of nanomist generator. The results showed that the number mode of the particle size produced by the new type nanomist humidifier at 4500 rpm and distance of 500 mm was 24 run and the mode diameter changed slightly with modification in frequency. The particle concentration increased with a rise in frequency of generator. The arithmetic mean diameter (AMD) and Sauter mean diameter (SMD) of the new type nanomists were much smaller than those generated by the old type. This finding indicates that new type nanomists would have benefits for postharvest storage of fresh fruit and vegetables. Moreover, the Nukiyama-Tanasawa equation could be used to estimate the particle size distribution by nanomists.