Abstract: A vacuum cleaner includes both a main dust separation unit and a secondary dust separation unit. One of the dust separation units is provided on a main body of the vacuum cleaner, and the other dust separation unit is provided on a removable dust collection unit that is mountable on the main body.

Abstract: A dust collection unit for a vacuum cleaner includes a first filtering chamber filtering relatively large foreign objects, a second filtering chamber filtering relatively small foreign objects when air exhausted from the first filtering chamber is introduced into the second filtering chamber, an exhaust member disposed above the filtering chambers to guide airflow, a storing chamber disposed under the filtering chambers to store the foreign objects filtered in the filtering chambers, a sealing member sealing bottoms of the filtering chambers, and a rectifying unit formed on an exhaust side of the second filtering chamber to rectify airflow, thereby reducing noise generated by the airflow.

Abstract: A dust collecting unit of a vacuum cleaner is provided. The dust collecting unit includes: a plurality of storing chambers and a plurality of filtering chambers provided in the inside of a multi-cyclone dust collecting unit. To improve reliability of the product, the storing chambers and the filtering chambers are integrally formed as one body.

Abstract: A dust collection unit for a vacuum cleaner includes a first cylindrical filtering chamber for filtering foreign objects contained in air using a cyclone airflow, a plurality of second filtering chamber formed along an outer circumference of the first cylindrical filtering chamber to receive the air passed through the first cylindrical filtering chamber, a first storing chamber formed under the first filtering chamber to store the foreign objects filtered in the first filtering chamber, a second storing chamber for storing the foreign objects filtered in the second filtering chambers, and a connection plate interconnecting opposite ends of the second storing chamber to define the first filtering chamber, the connection plate having a lower end located to be higher than a lower end of the second storing chamber.

Abstract: A dust collection assembly of a vacuum cleaner is provided. The dust collection assembly includes a dust collecting box, a filter, a flow guide unit, an exhaust guider, and an upper cover. The dust collecting box and the flow guide unit are integrally formed in a single body. The dust collecting box includes a first and second dust collecting spaces for collecting foreign objects. The filter is disposed in the inside of the dust collecting space to primarily filter foreign objects during operation of a cyclone. The flow guide unit guides airflow and has small cyclones integrally formed therein, for secondarily filtering the foreign objects in air. The exhaust guider guides airflow and has a plurality of discharge holes through which air filtered by the small cyclone flows. The upper cover is disposed on the upper side of the exhaust guider.

Abstract: A dust collection unit for a vacuum cleaner includes a collection body having a plurality of filtering chambers different from each in a volume and a plurality of storing chambers storing foreign objects filtered in the filtering chambers, a bottom seal member defining a bottom of the collection body, and an exhaust member guiding airflow in the filtering chambers. The exhaust member contacts tops of the filtering chambers as well as an outer circumference of the collection body.

Abstract: A dust collection unit for a vacuum cleaner includes a first filtering chamber filtering foreign objects using a cyclone airflow, a separation plate defining a top surface of the first filtering chamber, a filter having a diameter that is reduced as it goes downward in response to airflow rate variation in the first filtering chamber, and a blocking member provided under the filter to prevent the foreign objects filtered in the first filtering chamber from flying.