IMPROVED DUST SEPARATION APPARATUS

摘要

The invention provides apparatus for separating dirt and dust from an airflow comprising a frustoconical cyclone having a tangential air inlet located at or adjacent the end of the cyclone having the larger diameter and a cone opening located at the end of the cyclone having a smaller diameter. A collector is arranged so as to surround the cone opening and has a base surface facing towards the cone opening. According to the invention, at least a portion of the base surface is conical or frustoconical in shape and dust- retaining means are provided spaced from the centre of the base surface. This allows the apparatus to be reduced in size without substantially affecting the separation efficiency.