Patent ID: 9661969
Date: 2017-05-30
CPC Classifications: A47L,B01D,B04C

Claim:
1. A cyclone separation device comprising: a swirl chamber for swirling air containing dust along a side wall therein in a spiral manner around a central axis to separate dust from the air containing dust; a first dust collection chamber communicating with an inside of the swirl chamber through a first opening formed in the side wall of the swirl chamber; a second dust collection chamber communicating with the inside of the swirl chamber through a second opening formed on a downstream side of the first opening in the swirl chamber; a discharge pipe communicating with a discharge port for discharging air in the swirl chamber; a plurality of inlets through which the air containing dust flows into the swirl chamber, the inlets being provided on an upstream side of the first opening, wherein the plurality of inlets include a main inlet having a maximum opening area and at least one secondary inlet other than the main inlet, and the first opening is placed on a downstream side of the main inlet and the secondary inlet; a main inlet pipe connected to the main inlet; a secondary inlet pipe connected to the secondary inlet; and a bypass air trunk communicating with the main inlet pipe through a main communication port provided in a wall portion of the main inlet pipe, the bypass air trunk communicating with the secondary inlet pipe through a secondary communication port.