Dust collection unit and vacuum cleaner with the same

• US 7,645,309 B2
• Filed: 09/23/2005
• Issued: 01/12/2010
• Est. Priority Date: 12/27/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Young Ho, Park, Min, Hwang, Jung Bae, Hwang, Man Tac, Jeong, Hoi Kil
• Primary Examiner(s): Hopkins; Robert A
• Application Number:
  US11/233,004
• Publication Number:
  US 20060137309A1
• Time in Patent Office: 1,572 Days
• Field of Search: 553/37, 553/45, 554/24, 554/26, 554/29, 554/591, 55D/IG.3, 153/50, 153/53
• US Class Current: 55/337
• CPC Class Codes: A47L 5/362 of the horizontal type, e.g. canister or sledge type
• CPC Class Codes: A47L 9/1625 for series flow
• CPC Class Codes: A47L 9/1641 for parallel flow
• CPC Class Codes: A47L 9/1666 with filtering means
• CPC Class Codes: Y10S 55/03 Vacuum cleaner

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.

Claims

1. A dust collection unit for a vacuum cleaner, comprising:

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 disposed in the first filtering chamber; and

a blocking member detachably mounted under the filter to prevent the foreign objects filtered in the first filtering chamber from flying,

wherein the filter is provided at a lower end portion with an insertion portion that can be at least partly inserted into the blocking member.

2. The dust collection unit according to claim 1, wherein the diameter of the blocking member increases in a direction extending away from the filter.

3. The dust collection unit according to claim 1, wherein the filter is coupled to the separation plate to be capable of separating from the separation plate.

4. The dust collection unit according to claim 1, wherein a lower end of the filter is formed to define an acute point.

5. The dust collection unit according to claim 1, wherein the filter is provided throughout its entire body with apertures.

6. The dust collection unit according to claim 1, wherein the filter is formed in a cone shape.

7. The dust collection unit according to claim 1, wherein the separation plate is provided with a communication hole through which air passed through the filter flows.

8. The dust collection unit according to claim 1, wherein the filter is designed to be separable from the separation plate.

9. The dust collection unit according to claim 1, further comprising:

an insertion groove formed on the blocking member to correspond to the insertion portion; and

a second projection formed on the insertion groove to interlock with the insertion portion.

10. The dust collection unit according to claim 1, further comprising an airflow preventing plate integrally formed on a bottom of the blocking member.

11. The vacuum cleaner according to claim 10, wherein the filter is formed in a cone shape.

12. A vacuum cleaner comprising:

a base;

a dust collection unit disposed on a front portion of the base;

a motor disposed on a rear portion of the base; and

a cover disposed above the base,

wherein the dust collection unit comprises;

a first filtering chamber;

a plurality of second filtering chambers formed on an outer circumference of the first filtering chamber;

storing chambers formed under the first and second filtering chambers;

a filter detachably mounted on a center portion of the first filtering chamber, the filter being formed of a rigid plastic material;

a blocking member detachably mounted on the filter; and

a plurality of airflow preventing plates disposed in a radial direction and integrally formed with a bottom surface of the blocking member.

13. The vacuum cleaner according to claim 12, wherein an upper end of the filter is hooked on a top surface of the first filtering chamber.

14. The vacuum cleaner according to claim 12, wherein the blocking member has a circular horizontal section and the filter is fixed in a state where at least a portion of the filter is inserted in the blocking member.

15. The vacuum cleaner according to claim 12, wherein the filter, the blocking member and the airflow preventing member are aligned in a vertical direction.

16. The vacuum cleaner according to claim 12, wherein the filter is provided throughout its entire body with apertures.

17. A vacuum cleaner comprising:

a base;

a dust collection unit disposed on a front portion of the base;

a motor disposed on a rear portion of the base;

a cover disposed above the base; and

wherein the dust collection unit comprises;

a filtering chamber,

a filter detachably mounted on a center portion of the first filtering chamber, the filter being formed of a rigid plastic material;

a blocking member detachably mounted on the filter; and

a plurality of airflow preventing plates disposed in a radial direction and integrally formed with a bottom surface of the blocking member.

18. A vacuum cleaner comprising:

a motor generating sucking force;

a dust collection unit filtering foreign objects contained in air introduced by the sucking force generated by the motor; and

a suction assembly guiding outer air to the dust collection unit, wherein the dust collection unit comprises;

a first filtering chamber formed on a center portion of the dust collection unit and having a relatively large diameter;

a plurality of second filtering chambers formed on an outer circumference of the first filtering chamber;

a cone-shaped filter mounted on a center portion of the first filtering chamber;

a blocking member detachably mounted on the cone-shaped filter to prevent the foreign objects from flying; and

an airflow preventing plate integrally formed with the blocking member to stop the cyclone airflow.