Cleaner

Patent metadata

Field	Value
Publication number	US-11179015-B2
Application number	US-202016777512-A
Country	US
Kind code	B2
Filing date	Jan 30, 2020
Priority date	Mar 31, 2016
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

A cleaner includes: a suction motor that generates suction force; a dust separation unit that separates dust from air sucked by the suction force; a motor housing that covers the suction motor; a flow guide that surrounds an outer side of the motor housing and guides air discharged from the dust separation unit to the suction motor; and a body that forms an external appearance by surrounding the flow guide and guides air discharged from the suction motor together with the flow guide.

First claim

What is claimed is:

1. A cleaner comprising:
a suction unit configured to guide air into the cleaner;
a suction motor configured to drive a rotation of a rotary impeller via an impeller shaft to generate a suction force that suctions air into the cleaner through the suction unit;
a motor housing that accommodates the suction motor and the rotary impeller;
a cleaner body that accommodates the motor housing;
a dust separation unit comprising:
a first cyclone unit configured to separate dust from air that is suctioned into the cleaner through the suction unit, and
a second cyclone unit configured to receive air that is discharged from the first cyclone unit, the second cyclone unit comprising a plurality of cyclone bodies that are disposed at a lower side of the motor housing and configured to separate dust from the air that is discharged from the first cyclone unit; and

a filter system that is configured to be detachably coupled to the cleaner body, the filter system comprising:
a pre-filter that surrounds the motor housing and is configured to filter air that is discharged from the second cyclone unit and enters the motor housing, and
a secondary filter detachably coupled to the motor housing and arranged around an extension line of the impeller shaft, the secondary filter being configured to filter air that has passed through the suction motor and exits the cleaner body.

2. The cleaner of claim 1 , wherein the pre-filter circumferentially surrounds at least a part of the suction motor.

3. The cleaner of claim 1 , wherein the pre-filter circumferentially surrounds at least a part of the rotary impeller.

4. The cleaner of claim 1 , wherein at least a part of the pre-filter is configured to, based on the filter system being detached from the cleaner body, be exposed to an outside of the cleaner body.

5. The cleaner of claim 1 , wherein the impeller shaft extends along a longitudinal direction, and wherein a length of the pre-filter along the longitudinal direction is greater than a length of the secondary filter along the longitudinal direction.

6. The cleaner of claim 5 , wherein a width of the secondary filter along a radial direction is greater than a width of the pre-filter along the radial direction.

7. The cleaner of claim 1 , wherein the pre-filter is disposed within a circumferential boundary defined by the secondary filter.

8. The cleaner of claim 1 , wherein the pre-filter is configured to be inserted into the cleaner body before the filter system couples to the cleaner body.

9. The cleaner of claim 1 , wherein the secondary filter surrounds at least a part of the pre-filter.

10. The cleaner of claim 1 , wherein the pre-filter is configured to discharge the filtered air in an inward direction toward the suction motor.

11. The cleaner of claim 1 , wherein the filter system is configured to be coupled to the cleaner body based on being rotated in a first direction.

12. The cleaner of claim 11 , wherein the filter system is configured, based on being rotated in the first direction, to provide a seal to thereby prevent air flow inside the cleaner body from leaking to an outside of the cleaner body.

13. The cleaner of claim 11 , wherein, in a state in which the filter system is coupled to the cleaner body, at least a part of the pre-filter is configured to be exposed to an outside of the cleaner body based on the filter system being rotated in a second direction opposite the first direction.

14. The cleaner of claim 1 , wherein the filter system includes one of a coupling rib or a rib receiving portion, and the cleaner body includes the other of the coupling rib or the rib receiving portion, wherein the coupling rib is configured to be inserted into the rib receiving portion to thereby couple the filter system to the cleaner body.

15. The cleaner of claim 14 , wherein at least one of the coupling rib or the rib receiving portion is provided at an angle such that the filter system is configured move along a longitudinal direction based on being rotated by a user.

16. The cleaner of claim 1 , wherein, based on the filter system being coupled to the cleaner body and in a state in which the cleaner is oriented with the impeller shaft arranged along a vertical direction, at least a portion of the secondary filter is disposed vertically above the rotary impeller, the pre-filter is arranged longitudinally along the impeller shaft under the secondary filter, and pre-filter and the secondary filter are configured to be removed away from the cleaner body in the vertical direction.

17. The cleaner of claim 1 , wherein, based on the filter system being coupled to the cleaner body, the secondary filter is disposed farther away than the pre-filter in a radial direction with respect to a rotational axis of the rotary impeller.

18. The cleaner of claim 1 , wherein the secondary filter has an outer diameter larger than an outer diameter of the pre-filter in a radial direction with respect to a rotational axis of the rotary impeller.

19. The cleaner of claim 1 , wherein the filter system is separable from the cleaner body, and
wherein the filter system is configured to be separated from the cleaner body in a state in which the suction motor is fixed in the cleaner body.

20. The cleaner of claim 1 , wherein the pre-filter is separable from the cleaner body by detaching the filter system from the cleaner body.

21. The cleaner of claim 20 , wherein the pre-filter is configured to be exposed to an outside of the cleaner body when the filter system is separated from the cleaner body.

22. A cleaner comprising:
a suction unit configured to guide air into the cleaner;
a first cyclone unit configured to separate dust from air that is suctioned into the cleaner through the suction unit;
a second cyclone unit configured to separate dust from air discharged from the first cyclone unit;
a suction motor configured to drive rotation of an impeller to generate a suction force that suctions air into the cleaner through the suction unit;
a motor housing that receives the impeller and the suction motor; and
a filter system surrounding at least a portion of the impeller and at least a portion of the motor housing,
wherein the filter system comprises:
a pre-filter configured to filter air that is discharged from the second cyclone unit and enters the suction motor, and
a filter disposed vertically above the impeller and around the pre-filter and configured to filter air that exists the cleaner, the filter extending in a circumferential direction around a rotational axis of the impeller.

23. The cleaner of claim 22 , wherein the filter is arranged adjacent to the pre-filter.

24. The cleaner of claim 22 , wherein the pre-filter is disposed within a circumferential boundary defined by the filter.

25. The cleaner of claim 22 , wherein the filter surrounds at least a part of the pre-filter.

26. The cleaner of claim 22 , wherein the filter system further includes a filter frame supporting the filter and formed in a ring shape.

27. The cleaner of claim 26 , wherein the filter frame includes an inner frame and an outer frame disposed around the inner frame, wherein the inner frame and the outer frame are spaced apart from each other such that the filter is disposed therebetween.

28. The cleaner of claim 26 , wherein a portion of the pre-filter is disposed longitudinally along th

Assignees

• Lg Electronics Inc

Inventors

• Nam Bohyun
• Kim Namhee
• Kim Jinju
• An Hyeonjeong
• Hwang Jungbae
• Hwang Philjae
• Hwang Mantae
• SUNG Eunji
• LEE Taekgi

Classifications

• A47L9/2884

  Details of arrangements of batteries or their installation · CPC title

• A47L9/2857

  User input or output elements for control, e.g. buttons, switches or displays · CPC title

• A47L9/22

  Mountings for motor fan assemblies · CPC title

• A47L9/12

  Dry filters · CPC title

• A47L5/24 Primary

  Hand-supported suction cleaners · CPC title