IMPROVED DUST SEPARATION APPARATUS

摘要

The invention provides apparatus (10) for separating dirt or dust from an airflow comprising a frustoconical cyclone (12) having a tangential air inlet (16) located at or adjacent the end of the cyclone (12) having the larger diameter and a cone opening (18) located at the end of the cyclone (12) having the smaller diameter. A collector (20) is arranged so as to surround the cone opening (18) and has a base surface (24) facing towards the cone opening (18). According to the invention, at least a portion (24a) of the base surface (24') is conical or frustoconical in shape and dust-retaining means (30) are provided spaced from the centre of the base surface. This allows the apparatus (10) to be reduced in size without substantially affecting the separation efficiency.