Dust collector for vacuum cleaner

Patent metadata

Field	Value
Publication number	US-10194778-B2
Application number	US-201615000878-A
Country	US
Kind code	B2
Filing date	Jan 19, 2016
Priority date	Jan 19, 2015
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

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.

First claim

What is claimed is:

1. A vacuum cleaner having a dust collector, the dust collector comprising:
a first cyclone provided within an outer case to filter out dust from air introduced from an outside of the outer case; and
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 wherein the at least one second cyclone includes:
a cylindrically shaped casing having 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;
a vortex finder provided at a center of an upper portion of the casing and through which air from which fine dust has been separated is discharged;
at least one guide vane spirally extended along an inner circumference of the casing to induce rotational flow of the air introduced to an inside of the casing through an inlet between the casing and the vortex finder via the first space, wherein the at least one guide vane is integrally formed with the casing and the vortex finder; and
a cover mounted at a lower portion of the casing and having a discharge pipe formed with a second outlet to discharge fine dust in a downward direction of the casing, the discharge pipe being provided at a center of the cover, wherein the first outlet and the second outlet are open in directions perpendicular to each other.

2. The vacuum cleaner of claim 1 , 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.

3. The vacuum cleaner of claim 2 , 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.

4. The vacuum cleaner of claim 1 , wherein the casing passes through the 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 the first and second outlets communicate with the fine dust storage compartment.

5. The vacuum cleaner of claim 4 , 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.

6. The vacuum cleaner of claim 5 , 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.

7. The vacuum cleaner 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.

8. The vacuum cleaner of claim 7 , 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.

9. The vacuum cleaner of claim 8 , further including:
a lower cover that is hinge-coupled to the outer case to form a bottom surface of the outer case and the inner case in a closed position, and discharge dust collected in the dust storage compartment and fine dust collected in the fine dust storage compartment at the same time when opened.

10. A vacuum cleaner having a dust collector, the dust collector 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 and forming 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;
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;
a first discharge port located at a lower portion of an outer circumferential surface of the at least one second cyclone; and
a second discharge port located on a bottom surface of the at least one second cyclone,
wherein the first discharge port and the second discharge port are open in directions perpendicular to each other.

11. The vacuum cleaner of claim 10 , wherein the at least one second cyclone includes:
a cylindrically shaped casing; and
a vortex finder provided within the casing 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.

12. The vacuum cleaner of claim 11 , 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.

13. The vacuum cleaner of claim 12 , 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.

14. The vacuum cleaner of claim 11 , wherein the casing passes through a bottom surface of the first cyclone, and 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.

15. The vacuum cleaner of claim 14 , wherein both the first discharge port and the second discharge port are configured to discharge fine dust into the inner case.

16. The vacuum cleaner of claim 15 , 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, and 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.

17. The vacuum cleaner of claim 10 , wherein the first cyclone includes:
a housing formed to accommodate the second cyclone therein, and provided with an openi

Assignees

• Lg Electronics Inc

Inventors

• Hyun Kietak
• Lee Seungyeop
• Ahn Hyukjin

Classifications

• B04C5/28

  for parallel flow · CPC title

• A47L9/1633 Primary

  Concentric cyclones · CPC title

• A47L9/1608

  Cyclonic chamber constructions · CPC title

• A47L9/165

  Construction of inlets · CPC title

• A47L9/1641

  for parallel flow · CPC title