VACUUM CLEANER WITH REMOVABLE DUST COLLECTOR, AND METHODS OF OPERATING THE SAME

• US 20080023035A1
• Filed: 07/31/2007
• Published: 01/31/2008
• Est. Priority Date: 12/10/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Chang, Park, Yun, Kim, Jin, HA, Gun Ho, Seo, Jin, Yun, Chang
• Granted Patent: US 7,770,253 B2
• Time in Patent Office: Days
• US Class Current: 134/18
• CPC Class Codes: A47L 9/108 Dust compression means
• CPC Class Codes: A47L 9/1683 Dust collecting chambers; Dust collecting receptacles
• CPC Class Codes: A47L 9/1691 Mounting or coupling means for cyclonic chamber or dust receptacles
• CPC Class Codes: A47L 9/19 Means for monitoring filtering operation
• CPC Class Codes: A47L 9/2805 Parameters or conditions being sensed
• CPC Class Codes: A47L 9/2842 Suction motors or blowers
• CPC Class Codes: B30B 9/3007 Control arrangements
• CPC Class Codes: B30B 9/3082 with compression means other than rams performing a rectilinear movement

Abstract

A vacuum cleaner includes a dust collector that compresses dust stored inside a dust container to minimize the volume of the dust. The dust collector would include one or more pressing plates that are used to compress the dust stored in dust collector. Various methods are used to control movements of the movable pressing plates to facilitate the compression operations. Also, various methods are used to determine when the dust collector is full and needs to be emptied.

Claims

1. A method of operating a vacuum cleaner, comprising:

operating a suction motor of the vacuum cleaner at a first power level;

determining an amount of dust and foreign objects stored in a dust collection unit of the vacuum cleaner;

comparing the determined amount of dust and foreign objects to a predetermined amount; and

increasing the power level of the suction motor to a second power level which is higher than the first power level if the result of the comparison step indicates that the determined amount of dust and foreign objects exceeds the predetermined amount.

2. The method of claim 1, wherein the determining step comprises:

moving a compressing plate in the dust collection unit to compress dust and foreign objects stored in the dust collection unit;

determining how far the compressing plate is able to move within the dust collection unit; and

determining an amount of dust and foreign objects stored in the dust collection unit based on the determined amount of movement of the compressing plate.

3. The method of claim 2, wherein the moving step comprises moving the compressing plate in a reciprocating fashion.

4. The method of claim 2, wherein the moving step comprises rotating the compressing plate back and forth in clockwise and counterclockwise directions within the dust collection unit to compress dust and foreign objects in the dust collection unit.

5. The method of claim 4, wherein the step of determining how far the compressing plate is able to move comprises determining how fat the compressing plate is able to rotate.

6. The method of claim 4, wherein the step of determining how far the compressing plate is able to move comprises determining how long it takes for the compressing plate to fully rotate in either the clockwise or counterclockwise direction before the compressing plate stops.

7. The method of claim 4, wherein the step of determining how far the compressing plate is able to move comprises determining how long it takes for the compressing plate to rotate in either the clockwise or counterclockwise directions from a reference position to a position at which the compressing plate stops.

8. The method of claim 1, wherein the comparing step comprises comparing the determined amount of dust and foreign objects to first and second predetermined amounts.

9. The method of claim 8, wherein the increasing step comprises:

increasing the power level of the suction motor to a second power level which is higher than the first power level if the result of the comparison step indicates that the determined amount of dust and foreign objects exceeds the first predetermined amount and is less than the second predetermined amount; and

increasing the power level of the suction motor to a third power level which is higher than the first and second power levels if the result of the comparison step indicates that the determined amount of dust and foreign objects exceeds both the first and second predetermined amounts.

10. A vacuum cleaner, comprising:

a suction unit that operates to suck air into the vacuum cleaner;

a dust separation unit that separates dust and foreign objects from air sucked into the vacuum cleaner;

a dust collection unit which collects dust separated in the dust separation unit; and

a controller that varies the power of the suction unit depending on the amount of dust and foreign objects stored in the dust collection unit.

11. The vacuum cleaner of claim 10, further comprising a sensor coupled to the controller that detects the amount of dust and foreign objects stored in the dust collection unit.

12. The vacuum cleaner of claim 10, wherein the controller operates such that the suction of the vacuum cleaner remains substantially constant regardless of the amount of dust and foreign objects stored in the dust collection unit.

13. The vacuum cleaner of claim 10, wherein the controller can cause the suction unit to operate at a plurality of different power levels depending on the amount of dust and foreign objects stored in the dust collection unit.

14. The vacuum cleaner of claim 10, further comprising a movable dust compression plate that compresses dust in the dust collection unit.

15. The vacuum cleaner of claim 14, wherein the controller monitors the amount that the dust compression plate is able to move, and wherein the controller uses the amount of movement to determine how much dust and foreign objects are stored in the dust collection unit.

16. The vacuum cleaner of claim 14, wherein the dust compression plate moves in a reciprocal fashion to compress dust and foreign objects in the dust collection unit.

17. The vacuum cleaner of claim 16, wherein the dust compression plate rotates back and forth in clockwise and counterclockwise directions within the dust collection unit.

18. The vacuum cleaner of claim 17, wherein the controller monitors the rotational movements of the dust compression plate to determine the amount of dust and foreign objects stored in the dust collection unit.

19. The vacuum cleaner of claim 18, wherein the controller monitors the amount of time that it takes for the compression plate to move in a certain rotational direction to determine the amount of dust and foreign objects stored in the dust collection unit.

20. The vacuum cleaner of claim 18, further comprising a detector coupled to the controller that detects the angular rotational movements of the compression plate.