| 摘要 |
This invention relates to a screening unit suitable for use in conjunction with a nebulizer. A nebulizer is a device for producing an aerosol spray of liquid particles entrained in a fluid stream, for example air or a gas. An aerosol spray produced by a nebulizer is a convenient way of administering drugs and other medicines by inhalation for the treatment of respiratory and other internal disorders in humans. In more detail, the invention relates to a screening unit for use in conjunction with a nebulizer, the screening unit comprising a body, an inlet for receiving liquid particles entrained in a gas stream, a screen comprising a multiplicity of tortuous paths for removing from the stream particles greater than a predetermined size, a baffle disposed upstream of the screen and in the flow path of the gas stream, the baffle including at least one baffle member for directing the incoming gas stream in a contraflow pattern relative to the incoming gas stream to effect primary filtering in the screen, and an outlet for the so-filtered gas stream. |
