The diffuser cyclone dust collector differs significantly from the conventional cyclone dust collector in two aspects: one is the presence of a cone with a reverse-conical shape; the other is the installation of a reflector screen at the bottom of the cone. The purpose of the reverse cone is to gradually increase the distance from the cone wall to the cone, reducing the likelihood of the dusty gas short-circuiting to the exhaust pipe. The reflector screen's role is to allow the separated dust to fall into the ash bin through the annular gap between the cone and the reflector screen, preventing the rising purified gas from re-entraining fine dust and carrying it away, thereby enhancing the dust removal efficiency. The dust removal efficiency significantly drops when the reflector screen is removed, for instance, at an inlet gas velocity of 21 m/s and an inlet dust concentration of 50 g/m³, the efficiency without the reflector screen is only 81% to 86%; while using a 60° reflector screen, the efficiency reaches 93% to 95%. The cone angle of the reflector screen is generally 60°, and tests have shown that it offers higher dust removal efficiency and lower pressure loss compared to a 45° cone angle reflector screen.