At least one of the existing technical dirt separator devices of vacuum cleaners uses dust bags to collect dust, but such dust bags must often be replaced. Because of this, many vacuum cleaners now use centrifugal filters to separate dust from the inhaled air. An example of such a dirt separator device is the cyclone dust separation device, a structure of which is disclosed in the Korean patent publication No. 2001-0104810. Such a cyclone dirt separator device includes an air inlet formed on the side wall to generate circulating air flow and an air outlet formed on the upper wall. The air flowing into the air inlet is circulated in the cyclone dust separator. The dust or dirt heavier than the collected air is separated from the collected air by centrifugal force and collected by gravity in the garbage bin at the bottom or lower part of the cyclone dust separation device.
It is well known that the centrifugal force increases with the increase of the rotating radius of the cyclone dust device. Thus, in order to increase dirt separator, the curvature radius of cyclone dust separator must be determined according to the actual size.
Centrifugal or cyclone dirt separators are used as effective dust separators, but there is no need to replace dust bags. However, the air inlet of the cyclone dust separator is preferably formed in a certain position on the edge of the side wall of the dust separator and has a geometric shape that generates or assists in rotating air flow. As mentioned above, the radius of the dust separator must be relatively large to increase the centrifugal force of the dust carried by the air. Therefore, the inflow path in the vacuum cleaner is complex, and the dust separation device can not become compact. As a result, the dust or particulate separator which does not rely on cyclone air flow will be an improvement of the existing cyclone dirt separator.