DUST COLLECTOR FOR VACUUM CLEANER

• US 20160206169A1
• Filed: 01/19/2016
• Published: 07/21/2016
• Est. Priority Date: 01/19/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hyun, Kietak, Lee, Seungyeop, Ahn, Hyukjin
• Granted Patent: US 10,194,778 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A47L 9/1608 Cyclonic chamber constructions
• CPC Class Codes: A47L 9/1633 Concentric cyclones
• CPC Class Codes: A47L 9/1641 for parallel flow
• CPC Class Codes: A47L 9/165 Construction of inlets
• CPC Class Codes: A47L 9/1658 Construction of outlets
• CPC Class Codes: A47L 9/1666 with filtering means
• CPC Class Codes: A47L 9/1683 Dust collecting chambers; Dust collecting receptacles
• CPC Class Codes: B01D 45/12 by centrifugal forces centrifuges B04B; cyclones B04C
• CPC Class Codes: B01D 45/16 generated by the winding course of the gas stream , the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
• CPC Class Codes: B01D 50/20 Combinations of devices covered by groups B01D45/00 and B01D46/00
• CPC Class Codes: B04C 3/06 Construction of inlets or outlets to the vortex chamber
• CPC Class Codes: B04C 5/26 for series flow
• CPC Class Codes: B04C 5/28 for parallel flow

Abstract

A dust collector for a vacuum cleaner, including a first cyclone disposed within an outer case to filter out dust from air introduced from an outside thereof and introduce the air from which dust has been filtered out to an inside thereof, a second cyclone accommodated in the inside of the first cyclone to form a first space between the first cyclone and the second cyclone to separate fine dust from the air introduced to the inside of the first cyclone, and a guide vane spirally extended along an inner circumference of the second cyclone to induce rotational flow to the air introduced to an inside of the second cyclone through an inlet of the second cyclone via the first space, wherein the guide vane is integrally provided on the second cyclone.

Claims

1. A dust collector for a vacuum cleaner, comprising:

a first cyclone provided within an outer case to filter out dust from air introduced from an outside of the outer case;

at least one second cyclone accommodated inside of the first cyclone to form a first space between the first cyclone and the at least one second cyclone, wherein the at least one second cyclone separates fine dust from the air introduced to the inside of the first cyclone; and

at least one guide vane spirally extended along an inner circumference of the at least one second cyclone to induce rotational flow of the air introduced to an inside of the at least one second cyclone through an inlet of the second cyclone via the first space, wherein the at least one guide vane is integrally provided on the at least one second cyclone.

2. The dust collector of claim 1, wherein the at least one second cyclone includes:

a cylindrically shaped casing; and

a vortex finder provided within the easing at the center of the at least one second cyclone to discharge air from which fine dust has been separated, wherein the at least one guide vane is integrally formed with the casing and vortex finder on the inlet between an inner circumference of the casing and an outer circumference of the vortex finder.

3. The dust collector of claim 2, wherein the at least one guide vane includes a plurality of guide vanes provided to be spaced from each other at predetermined intervals along an outer circumference of the vortex finder.

4. The dust collector of claim 3, wherein an air entrance extended toward an inner circumference of the outer case is formed at an upper portion of the outer case to rotate air introduced from an outside of the outer case in a first direction, and wherein the plurality of guide vanes are formed in an inclined manner downward along the first direction to rotate air introduced into the inlet of the second cyclone through the first space downward in the first direction to be introduced to an inside of the second cyclone.

5. The dust collector of claim 2, wherein the casing passes through a bottom surface of the first cyclone, wherein an inner case provided with a fine dust storage compartment configured to collect fine dust is coupled to a lower portion of the first cyclone, and wherein at least one outlet communicating an inside of the second cyclone with the fine dust storage unit to discharge fine dust to the fine dust storage compartment is provided on the second cyclone.

6. The dust collector of claim 5, wherein the at least one outlet includes:

a first outlet formed on an outer circumference of a lower side of the casing to discharge fine dust in an outer circumferential direction of the casing; and

a second outlet formed at the center of a lower side of the casing to discharge fine dust in a downward direction of the casing, wherein the inner case accommodates the first and the second outlet to collect fine dust discharged from the first and the second outlet into the fine dust storage compartment.

7. The dust collector of claim 6, wherein a cover forming a bottom surface of the casing is mounted at a lower portion of the casing, and wherein a discharge pipe formed with the second outlet is provided at the center of the cover.

8. The dust collector of claim 5, wherein a skirt is formed in a protruding manner along an outer circumferential surface of a lower portion of the first cyclone, and wherein the inner case is coupled to the skirt.

9. The dust collector of claim 8, wherein the inner case includes:

a first portion coupled to the skirt and formed in a tapering manner downward; and

a second portion extended downward from the first portion and arranged in a direction parallel to the outer case.

10. The dust collector of claim 1, wherein the first cyclone includes:

a housing formed to accommodate the second cyclone therein, and provided with an opening portion communicating with an inside on an outer circumference thereof; and

a mesh filter installed to cover the opening portion to filter out and separate the dust from the air.

11. The dust collector of claim 10, wherein an inner case configured to collect fine dust discharged from the second cyclone is installed at a lower portion of the housing, and

dust filtered out through the mesh filter is collected into a dust storage compartment between an inner circumference of the outer case and an outer circumference of the inner case.

12. The dust collector of claim 11, further including:

a lower cover hinge-coupled to the outer case to form a bottom surface of the outer case and the inner case during the closing, and discharge dust collected in the dust storage compartment and fine dust collected in the fine dust storage compartment at the same time during the opening.