Abstract: A cyclonic separator and a vacuum cleaner which efficiently separates dust, collect the dust without re-scattering it and make low noise are provided. In a primary cyclone portion 10, a primary swirl chamber 12 swirls air containing dust sucked from a primary inlet 11, and thereby, separates a first dust and a second dust from the air containing dust to collect them respectively in a zero-order dust case 114 which is provided at a side of the primary swirl chamber 12 and communicates with a zero-order opening portion 113 provided at a side wall, and a primary dust case 14 provided at a lower side of the primary swirl chamber 12.

Abstract: A cyclonic separator and a vacuum cleaner which efficiently separates dust, collect the dust without re-scattering it and make low noise are provided. In a primary cyclone portion 10, a primary swirl chamber 12 swirls air containing dust sucked from a primary inlet 11, and thereby, separates a first dust and a second dust from the air containing dust to collect them respectively in a zero-order dust case 114 which is provided at a side of the primary swirl chamber 12 and communicates with a zero-order opening portion 113 provided at a side wall, and a primary dust case 14 provided at a lower side of the primary swirl chamber 12.

Abstract: A dust collection unit includes a swirl chamber, dust collection chambers, a discharge pipe, an inlet pipe, a bypass inlet, and a bypass inlet airflow passage. The swirl chamber swirls, along a side wall, dust-containing air having entered from a primary inlet and a secondary inlet having a smaller opening area than the primary inlet, and separates dust from the dust-containing air. The dust separated by the swirl chamber is collected by the dust collection chambers. A discharge pipe has a discharge opening. The inlet pipe allows the dust-containing air to flow from the primary inlet into the swirl chamber. A bypass inlet is formed in the inlet pipe. The bypass inlet airflow passage allows the dust-containing air in the inlet pipe having entered from the bypass inlet to flow from the secondary inlet into the swirl chamber.

Abstract: A dust collection unit includes a swirl chamber, dust collection chambers, a discharge pipe, an inlet pipe, a bypass inlet, and a bypass inlet airflow passage. The swirl chamber swirls, along a side wall, dust-containing air having entered from a primary inlet and a secondary inlet having a smaller opening area than the primary inlet, and separates dust from the dust-containing air. The dust separated by the swirl chamber is collected by the dust collection chambers. A discharge pipe has a discharge opening. The inlet pipe allows the dust-containing air to flow from the primary inlet into the swirl chamber. A bypass inlet is formed in the inlet pipe. The bypass inlet airflow passage allows the dust-containing air in the inlet pipe having entered from the bypass inlet to flow from the secondary inlet into the swirl chamber.

Abstract: A cyclonic separator and a vacuum cleaner which efficiently separates dust, collect the dust without re-scattering it and make low noise are provided. In a primary cyclone portion 10, a primary swirl chamber 12 swirls air containing dust sucked from a primary inlet 11, and thereby, separates a first dust and a second dust from the air containing dust to collect them respectively in a zero-order dust case 114 which is provided at a side of the primary swirl chamber 12 and communicates with a zero-order opening portion 113 provided at a side wall, and a primary dust case 14 provided at a lower side of the primary swirl chamber 12.