Dust collector and cleaner having the same

Patent metadata

Field	Value
Publication number	US-2019091702-A1
Application number	US-201815941181-A
Country	US
Kind code	A1
Filing date	Mar 30, 2018
Priority date	Sep 22, 2017
Publication date	Mar 28, 2019
Grant date	—

Abstract

A dust collector includes a cylindrical housing forming an outer appearance of the dust collector; a cyclone formed inside the housing to cause a swirling flow to separate dust from air introduced into the housing; axial inlet type swirl tubes to receive air and fine dust that have passed through the cyclone, and causing a swirling flow to separate the fine dust from the air; and a mesh configured to surround an outside of the axial inlet type swirl tubes to form a boundary between the cyclone and the axial inlet type swirl tubes, wherein the axial inlet type swirl tubes are configured with four groups and stacked in multiple stages on virtual quadrants, the axial inlet type swirl tubes arranged in the same quadrant are arranged to face the same direction, and the axial inlet type swirl tubes arranged in different quadrants are arranged to face different directions.

First claim

What is claimed is:

1 . A dust collector, comprising:
a cylindrical housing configured to form an outer appearance of the dust collector; a cyclone provided inside the housing and configured to generate a first swirling flow to separate dust from air introduced into the housing; axial inlet type cyclones configured to receive air and fine dust that have passed through the cyclone, and generate second swirling flows to separate the fine dust from the received air; and a mesh configured to surround the axial inlet type cyclones and to form a boundary between the cyclone and the axial inlet type cyclones, wherein
the axial inlet type cyclones are positioned in four groups in four respective quadrants within the housing,
ones of the axial inlet type cyclones included in one of the four groups positioned in one of the quadrants are oriented to face a first direction, and
ones of the axial inlet type cyclones included in other ones of the groups that are positioned in other ones of the quadrants are oriented to face other directions that differ from the first direction.

2 . The dust collector of claim 1 , wherein each of the axial inlet type cyclones includes:
an inlet positioned to face the mesh and to receive air and fine dust; and an air outlet and a fine dust outlet that are open toward a same direction, and wherein the inlet is open toward a direction that is opposite to that of the air outlet and the fine dust outlet.

3 . The dust collector of claim 2 , wherein the fine dust outlet is formed in a ring shape around the air outlet.

4 . The dust collector of claim 2 , wherein each of the axial inlet type cyclones includes:
a body having a cylindrical shape; a vortex finder provided on an inlet side of the body, and provided with a cylindrical first surface and a conical second surface protruded from the first surface toward an outlet side of the body; a vane formed between an outer circumferential surface of the first surface and an inner circumferential surface of the body, the vane extending in a spiral direction; and an outlet partition provided at the outlet side of the body, and formed in a cylindrical shape to partition the air outlet and the fine dust outlet formed around the air outlet.

5 . The dust collector of claim 4 , wherein
the axial inlet type cyclones are formed by a coupling a first member and a second member, the first member forms the body, the vortex finder and the vane of each of the axial inlet type cyclones, the second member forms the outlet partition portion of each of the axial inlet type cyclones, and at least a portion of the outlet partition is inserted into the outlet side of the body.

6 . The dust collector of claim 5 , wherein
the first member further includes a curved or planar body base, the body protrudes from both sides of the body base, the second member further includes an outlet base having a curved or planar surface, the outlet base includes a quantity of air vent holes corresponding to a quantity of the axial inlet type cyclones, and the outlet partitions protrude from circumferences of corresponding ones of the air vent holes and toward an inside of the body.

7 . The dust collector of claim 6 , wherein the body is divided into an inlet side and an outlet side based on the body base, and
the first member further includes a rim surface extended from the body base toward the outlet side direction and around the outlet side of the body.

8 . The dust collector of claim 7 , wherein when the first member is coupled to the second member, the rim surface is positioned adjacent to the outlet base to seal a first portion of the rim surface and to define an opening at a second portion of the rim surface that is adjacent to a lower portion of the outlet base.

9 . The dust collector of claim 6 , wherein
a rising flow path of air discharged from the axial inlet type cyclones is formed within the second member, and the rising flow path has a cross-shaped cross section corresponding to a coordinate axis of the quadrants, and communicates with an outlet of the dust collector formed at an upper side of the housing.

10 . The dust collector of claim 9 , wherein
the axial inlet type cyclones include:
a first one of the four groups provided in a first one of the quadrants;
a second one of the four groups provided in a second one of the quadrants;
a third one of the four groups provided in a third one of the quadrants; and
a fourth one of the four groups provided in a fourth one of the quadrants, and
each of the axial inlet type cyclones is formed by a coupling four first members corresponding to the four groups and the second member, and the outlet bases of the axial inlet type cyclones included in the four groups are provided in different quadrants, and to face four different directions.

11 . The dust collector of claim 10 , wherein the four first members are coupled to the second member in different directions.

12 . The dust collector of claim 10 , wherein
the mesh is provided in an inner region of the housing, the four groups of the axial inlet type cyclones are provided within the mesh, and the rising flow path is formed in a region surrounded by the four groups of the axial inlet type cyclones.

13 . The dust collector of claim 10 , wherein the second member further includes:
four sidewalls respectively provided to face the outlet bases of the four groups at positions the are spaced apart by interposing respective coordinate axis of the quadrants therebetween; and four connecting walls crossing the coordinate axis of the quadrants to connect outer sides of the sidewalls to respective facing outer sides of the outlet bases, and wherein the four outlet bases, the four sidewalls, and the four connecting walls are sequentially connected to form a cross-shaped rising flow path.

14 . The dust collector of claim 13 , wherein each of the groups of the axial inlet type cyclones are provided in a respective region defined by the mesh, the outlet bases and the sidewalls, and
axial lengths of ones the axial inlet type cyclone in each of the groups gradually increase toward the sidewall.

15 . The dust collector of claim 13 , further comprising:
a first dust collection chamber formed in a ring shape inside the housing and formed to collect the dust from the cyclone; and a second dust collection chamber formed in a region surrounded by the first dust collection chamber, and configured to collect the fine dust from the axial inlet type cyclones, and wherein the second member further comprises a lower block surface that partitions the second dust collection chamber and the rising flow path to block the fine dust collected in the second dust collection chamber from entering the rising flow path, and the lower block surface is formed at a lower end of the outlet base, the sidewall, and the connecting wall.

16 . The dust collector of claim 9 , further comprising a mesh support surface that surrounds an upper rim of the mesh,
wherein
the second member further includes an upper block surface formed at an upper end of the outlet base, and
the upper block surface has a circular outer rim to be brought adjacent to an inner circumferential surface of the mesh support surface, and partitions an inlet of the axial inlet type cyclones and a downstream side of the rising flow path to separate air to be introduced into the axial inlet type cyclones and air discharged through the rising flow path.

17 . The dust collector of claim 1 , further comprising:
a first dust collec

Assignees

• Lg Electronics Inc

Inventors

• Hyun Kietak
• Eo Soohan
• Lee Sangchul

Classifications

• A47L9/1616

  Multiple arrangement thereof · CPC title

• A47L9/1683

  Dust collecting chambers; Dust collecting receptacles · CPC title

• A47L9/1625

  for series flow · CPC title

• A47L9/1666

  with filtering means · CPC title

• B04C3/06

  Construction of inlets or outlets to the vortex chamber · CPC title