U.S. patent application number 10/947007 was filed with the patent office on 2005-10-06 for filtering device for vacuum cleaner.
This patent application is currently assigned to LG Electronics Inc.. Invention is credited to Chung, Choon-Myun, Rew, Ho-Seon.
Application Number | 20050217067 10/947007 |
Document ID | / |
Family ID | 36458633 |
Filed Date | 2005-10-06 |
United States Patent
Application |
20050217067 |
Kind Code |
A1 |
Rew, Ho-Seon ; et
al. |
October 6, 2005 |
Filtering device for vacuum cleaner
Abstract
A filtering device for a vacuum cleaner comprises: a casing
having a collecting space therein, a suction opening through which
air including dust is sucked and a discharge opening through which
purified air is discharged; a filter installed at the internal
space of the casing, for filtering dust from air sucked through the
suction opening; and a filter cleaning unit disposed to encompass
an outer circumferential surface of the filter, for cleaning the
filter by being rotated by a rotation force of air sucked through
the suction opening. Accordingly, the filtering device can remove
fine dust attached to the filter in a cleaning operation, thereby
preventing a channel of the filter from being closed with the
dust.
Inventors: |
Rew, Ho-Seon; (Seoul,
KR) ; Chung, Choon-Myun; (Gwangmyeong, KR) |
Correspondence
Address: |
LEE, HONG, DEGERMAN, KANG & SCHMADEKA
801 S. FIGUEROA STREET, 14TH FLOOR
LOS ANGELES
CA
90017
US
|
Assignee: |
LG Electronics Inc.
|
Family ID: |
36458633 |
Appl. No.: |
10/947007 |
Filed: |
September 21, 2004 |
Current U.S.
Class: |
15/352 ;
15/327.1 |
Current CPC
Class: |
A47L 9/20 20130101 |
Class at
Publication: |
015/352 ;
015/327.1 |
International
Class: |
A47L 009/20 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 6, 2004 |
KR |
23522/2004 |
Claims
What is claimed is:
1. A filtering device for a vacuum cleaner comprising: a casing
having a collecting space therein, a suction opening through which
air including dust is sucked and a discharge opening through which
purified air is discharged; a filter installed at the internal
space of the casing, for filtering dust from air sucked through the
suction opening; and a filter cleaning unit disposed to encompass
an outer circumferential surface of the filter, for cleaning the
filter by being rotated by a rotation force of air sucked through
the suction opening.
2. The filtering device of claim 1, wherein the suction opening of
the casing is eccentrically formed at one side of the casing so
that sucked air can be rotated in the casing.
3. The filtering device of claim 1, wherein the filter cleaning
unit comprises: a rotary ring disposed to encompass an outer
circumferential surface of the filter; a blade mounted to an outer
circumferential surface of the rotary ring, for rotating and
lifting the rotary ring by the rotation force of air sucked through
the suction opening; and a brush mounted at an inner
circumferential surface of the rotary ring, for removing dust
attached to a surface of the filter by being rotated together with
the rotary ring.
4. The filtering device of claim 3, wherein the blade is integrally
protruded from the outer circumferential surface of the rotary
ring.
5. The filtering device of claim 4, wherein the blade is inclined
at a predetermined angle on the basis of an axial direction of the
filter so that the rotary ring is lifted.
6. The filtering device of claim 5, wherein at least two blades are
formed.
7. The filtering device of claim 6, wherein one pair of blades are
formed in a diagonal direction of the rotary ring.
8. The filtering device of claim 6, wherein several pairs of blades
are formed in diagonal directions of the rotary ring.
9. The filtering device of claim 6, wherein a plurality of blades
are formed at an outer circumferential surface of the rotary ring
at regular intervals.
10. The filtering device of claim 4, wherein the blade is formed in
a curved shape.
11. The filtering device of claim 3, wherein the brushes are
protruded from an inner circumferential surface of the rotary ring
toward the center of the rotary ring at regular intervals.
12. The filtering device of claim 3, wherein the brushes are
successively protruded from the entire inner circumferential
surface of the rotary ring toward the center of the rotary ring.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a vacuum cleaner, and more
particularly, to a filtering device for a vacuum cleaner capable of
removing dust attached to a filter in operation of a cleaner.
[0003] 2. Description of the Background Art
[0004] In general, a vacuum cleaner is an electronic device for
cleaning an indoor space such as a room, an office or the inside of
a car. Undesired impurities such as dust, which exists at home or
in a car can be removed by using a suction force of the vacuum
cleaner.
[0005] FIG. 1 is a perspective view showing a structure of a
general vacuum cleaner.
[0006] As shown therein, a general vacuum cleaner includes a
cleaner main body 1 and a suction head 2 connected to the cleaner
main body 1 by a suction hose 3 and an extension pipe 4, to which
dust and foreign substances are sucked from a floor.
[0007] The cleaner main body 1 includes a suction force generating
part (not shown) for generating a suction force and a filtering
device 6 for filtering dust and foreign substances by the suction
force generated from the suction force generating part.
[0008] As shown in FIG. 2, the filtering device 6 is provided with
a knob 8 and is detachably attached to a filtering device mounting
portion 5 recessed from one side of the cleaner main body 1.
Accordingly, a user can couple the filtering device 6 to the
cleaner main body 1 and separate the filtering device 6 therefrom,
more conveniently, by using the knob 8.
[0009] FIG. 3 is a disassembled perspective view showing a
filtering device of a conventional vacuum cleaner, and FIG. 4 is a
longitudinal sectional view taken along line IV-IV of FIG. 3.
[0010] The filtering device of a conventional vacuum cleaner
includes a casing 12 having a collecting space therein, a suction
opening 14 through which air including dust is sucked and a
discharge opening 15 through which purified air is discharged; and
a filter 13 installed at the internal space of the casing 12, for
filtering dust from air sucked through the suction opening 14.
[0011] The casing 12 includes a body 10 formed in a cup shape an
upper side of which is opened and having the suction opening 14 at
its one side; and a cover 11 installed for covering the upper
surface of the body 10.
[0012] A filter supporter 18 through which a discharge opening 15
penetrates is installed at the cover 11, and the filter 13 is
mounted at the filter support plate 18, so that purified air is
discharged outside. In addition, when the cover 11 and the body 10
are coupled to each other, the filter 13 is positioned inside the
body 10.
[0013] A support wall body 16 is protruded from an inner lower
portion of the body 10 at a predetermined height. A pair of
blocking plates 17 are installed to face each other at an upper
surface of the support wall body 16, having a certain gap
therebetween, so that relatively big dust or foreign substances of
dust introduced into the body 10 are prevented from escaping
therefrom.
[0014] A process for collecting dust in a filtering device 6 of a
conventional vacuum cleaner will now be described.
[0015] When power is applied, a suction force is generated from a
suction force generating part (not shown), and dust and foreign
substances are sucked into the casing 12 through the suction
opening 14 via the suction head 3, the expansion pipe 4 and the
suction hose 3. The dust sucked into the casing 12 is purified by
the filter 13 and collected in the casing 12, and only air purified
while passing through the filter 13 is discharged through the
discharge opening. Here, dust or foreign substances having a
relatively great weight fall to a gap between the blocking plates
17 by their weights and then are collected at an inner lower
portion of the casing 12. The support wall body 16 cuts off an eddy
that may occur in a space under the blocking plate 17 so as to
prevent dust from floating and so from moving into a space above
the blocking plate 17. Fine dust or foreign substances which are
relatively light are not collected in the space under the blocking
plate 17 but float together with air and are purified again by the
filter 13.
[0016] However, the above-mentioned conventional vacuum cleaner has
disadvantages in that the filter has to be cleaned or replaced
periodically. This is because when the conventional vacuum cleaner
is used for a certain period of time, fine dust is attached to the
filter of the filtering device, thereby deteriorating a suction
force. That is, since fine dust fills up a close mesh of the
filter, it is difficult to discharge air, which is sucked through
the suction opening, through the filter, and finally a decrease in
suction force is caused. Accordingly, if the filter is not cleaned
or replaced periodically, cleaning cannot be effectively performed
due to the deterioration of the suction force.
SUMMARY OF THE INVENTION
[0017] Therefore, an object of the present invention is to provide
a filtering device for a vacuum cleaner capable of preventing a
channel of a filter from being closed with dust, by self-removing
fine dust attached to a filter in a cleaning operation.
[0018] To achieve these and other advantages and in accordance with
the purpose of the present invention, as embodied and broadly
described herein, there is provided a filtering device for a vacuum
cleaner comprising: a casing having a collecting space therein, a
suction opening through which air including dust is sucked and a
discharge opening through which purified air is discharged; a
filter installed at the internal space of the casing, for filtering
dust from air sucked through the suction opening; and a filter
cleaning unit disposed to encompass an outer circumferential
surface of the filter, for cleaning the filter by being rotated by
a rotation force of the air sucked through the suction opening.
[0019] The foregoing and other objects, features, aspects and
advantages of the present invention will become more apparent from
the following detailed description of the present invention when
taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings, which are included to provide a
further understanding of the invention and are incorporated in and
constitute a unit of this specification, illustrate embodiments of
the invention and together with the description serve to explain
the principles of the invention.
[0021] In the drawings:
[0022] FIG. 1 is a perspective view showing a conventional vacuum
cleaner;
[0023] FIG. 2 is a partial perspective view of a conventional
vacuum cleaner, which shows that a dust container is separated from
a main body;
[0024] FIG. 3 is a disassembled perspective view showing a
conventional vacuum cleaner;
[0025] FIG. 4 is a longitudinal sectional view taken along line
IV-IV of FIG. 3 and showing an assembled conventional filtering
device;
[0026] FIG. 5 is a disassembled perspective view of a filtering
device of a vacuum cleaner in accordance with the present
invention;
[0027] FIG. 6 is a longitudinal sectional view taken along line
VI-VI of FIG. 5 and showing an assembled filtering device in
accordance with the present invention;
[0028] FIG. 7 is a perspective view of a filter-cleaning unit in
accordance with the present invention;
[0029] FIG. 8 is a perspective view showing a modified example of a
blade of a filtering cleaning unit in accordance with the present
invention;
[0030] FIG. 9A is a longitudinal sectional view of a dust container
of a vacuum cleaner in accordance with the present invention, for
showing a position of a filter cleaning unit when a suction force
is weak;
[0031] FIG. 9B is a longitudinal sectional view of a dust container
of a vacuum cleaner in accordance with the present invention, for
showing a position of a filter cleaning unit when a sectional force
is normal; and
[0032] FIG. 9C is a longitudinal sectional view of a dust container
of a vacuum cleaner in accordance with the present invention, for
showing a position of a filter-cleaning unit when a suction force
is strong.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0033] Reference will now be made in detail to the preferred
embodiments of the present invention, examples of which are
illustrated in the accompanying drawings.
[0034] There may exist a plurality of embodiments of a filtering
device for a vacuum cleaner in accordance with the present
invention, and hereinafter, the most preferred embodiment will be
described.
[0035] In addition, the same reference numerals will be given to
the same components as the conventional art.
[0036] FIG. 5 is a disassembled perspective view of a filtering
device for a vacuum cleaner in accordance with the present
invention, FIG. 6 is a longitudinal sectional view taken along line
VI-VI of FIG. 5 and showing an assembled filtering device in
accordance with the present invention, and FIG. 7 is a perspective
view of a filter cleaning unit in accordance with the present
invention.
[0037] As shown therein, a filtering device of a vacuum cleaner in
accordance with the present invention is provided with a knob 80
and detachably attached to a filtering device mounting portion 5
recessed from one side of the main body 1. Accordingly, a user can
couple the filtering device to the cleaner main body 1 and separate
the filtering device therefrom, more conveniently, by using the
knob 80.
[0038] A filtering device of a vacuum cleaner in accordance with
the present invention includes a casing 120 having a collecting
space therein, a suction opening 140 through which air including
dust is sucked and a discharge opening 150 through which purified
air is discharged; a filter installed at an internal space of the
casing 120, for filtering dust from air sucked through the suction
opening 140; and a filter cleaning unit 200 disposed to encompass
an outer circumferential surface of the filter 130, for cleaning
the filter 130 by being rotated by a rotation force of air sucked
through the suction opening 140.
[0039] The casing includes a body 100 formed in a cup shape an
upper side of which is opened; and a cover 110 installed for
covering the upper surface of the body 100.
[0040] A cylindrical filter supporter 180 through which a discharge
opening 150 penetrates is installed at the cover 110, and the
filter is mounted to the filter supporter 180, so that purified air
can be discharged outside. In addition, when the cover 110 and the
body 100 are coupled to each other, the filter is positioned inside
the body 100.
[0041] A support wall body 160 having a predetermined height is
protruded from an inner lower portion of the body 100. A pair of
blocking plates 170 are installed to face each other, having a
certain gap therebetween, so that relatively big dust or foreign
substances of dust introduced into the body 100 are prevented from
escaping therefrom.
[0042] The filter 130 can filter even fine dust and is formed in a
cylindrical shape as to be mounted to the filter supporter 180.
[0043] Preferably, the suction opening 140 is eccentrically formed
at one side of the body 100 so that introduced air and dust can
rotate in the casing 120.
[0044] The filter cleaning unit 200 includes a rotary ring 210
disposed to encompass an outer circumferential surface of the
filter 130; a blade 220 formed at an outer circumferential surface
of the rotary ring 210, for rotating and lifting the rotary ring
210 by a rotation force of air sucked through the suction opening
140; and a brush 230 mounted inside the rotary ring 210, for
removing dust attached to the surface of the filter 130 by being
rotated together with the rotary ring 210.
[0045] Preferably, the rotary ring 210 is formed in a round ring
shape having a predetermined width and is made of light material
such as plastic so as to be easily rotated and lifted.
[0046] The blade 220 is integrally protruded from an outer
circumferential surface of the rotary ring 210. In addition,
preferably, at least two blades 220 are formed at the outer
circumferential surface of the rotary ring 210.
[0047] In addition, the blade 220 is inclined at a predetermined
angle (.theta.) on the basis of an axial direction of the filter
130 in order to rotate and simultaneously lift the rotary ring 210
by air introduced through the suction opening 140 formed at the
body 100.
[0048] In addition, a pair of blades 220 are formed to face each
other in a diagonal direction of the rotary ring 210, so that the
rotary ring 210 can be stably rotated. That is, preferably, a pair
of blades 220 are formed in a diagonal direction of the rotary ring
210 so that the center of gravity of the rotary ring 210 does not
become eccentric. In addition, in view of a design condition,
several pairs of blades may be formed in diagonal directions of the
rotary ring 210, or a plurality of blades 220 may be formed at an
outer circumferential surface at regular intervals.
[0049] FIG. 8 shows a modified example of a blade 220 in accordance
with the present invention. As shown therein, a blade 220 formed at
an outer circumferential surface of the rotary ring 210 is formed
in a curved shape, so that the rotary ring 210 can be rotated and
lifted much more efficiently.
[0050] The brushes 230 are protruded at regular intervals from an
inner circumferential surface of the rotary ring 210 toward the
center of the rotary ring 210.
[0051] As shown in the drawing, preferably, four brushes are
installed at intervals of 90.degree.. However, in view of the
design, more than four brushes 230 may be formed by pairs to face
each other, or only two brushes 230 may be formed to face each
other at the inner circumferential surface of the rotary ring 210
at an interval of 180.degree.. In addition, the brushes 230 may be
successively formed at the entire inner circumferential surface of
the rotary ring 210, facing the center of the rotary ring 210.
[0052] An operation of the filtering device for a vacuum cleaner in
accordance with the present invention will now be described.
[0053] When a fan-motor of a vacuum cleaner is operated, and a
suction force work in the casing 120 of the filtering device, dust
or foreign substances sucked through the suction head of the
cleaner are sucked into the casing 120 through the suction opening
140 formed at one side surface of the casing 120, together with
air. Big dust or foreign substances of the dust or foreign
substances sucked in such a manner fall by self-weight and are
collected at an inner lower portion of the casing 120 divided by
the blocking plate 105. Only fine dust is discharged toward the
discharge opening 150 together with air. Dust in the air discharged
toward the discharge opening 150 is filtered by the filter 130, and
only filtered air is discharged through the discharge opening
102.
[0054] In addition, the rotary ring 210 is rotated and
simultaneously lifted by a rotation force of air introduced from
the inner side surface of the casing 120 through the suction
opening 140, which is applied to the blade 220 formed at an outer
circumferential surface of the rotary ring 210 of the filter
cleaning unit 200. The brush 230 installed inside the rotary ring
210 is rotated together therewith, thereby removing dust attached
to an outer surface of the filter 103.
[0055] That is, when the vacuum cleaner performs a cleaning
operation, the filter-cleaning unit 200 encompassing the outer
circumferential surface of the filter 130 is operated. Dust
attached to the outer surface of the filter 103 is removed by the
operation of the filter cleaning unit 104, so that a rapid decrease
in suction force due to a channel closed with dust attached to the
filter 103 can be prevented.
[0056] FIGS. 9A to 9C are operational views showing that a filter
is cleaned in accordance with the present invention. As shown
therein, the filter cleaning unit 200 rises and falls according to
a cleaning mode to thereby remove dust. When a suction force of a
cleaner is weak, the filter cleaning unit 200 is rotated at a lower
end portion of the filter 103 as shown in FIG. 9a, thereby removing
dust attached to an outer surface of the filter 130. When a suction
force is normal, the filter cleaning unit 200 is rotated at a
central portion of the filter 130 as shown in FIG. 9B. When the
suction force is strong, the filter cleaning unit 200 is rotated at
an upper end portion of the filter 103, thereby removing dust
attached to the outer surface of the filter 130. That is, in
general, when a user uses a cleaner, changing a cleaning mode, the
filter cleaning unit 200 is rotated at the outer surface of the
filter and moves upwardly and downwardly, thereby removing dust
attached to the filter 130.
[0057] As so far described, in the filtering device for a vacuum
cleaner in accordance with the present invention, a filter cleaning
unit is rotated, falling and rising by a rotation force of air
sucked into an internal space of the casing, thereby cleaning the
outer circumferential surface of the filter. Hence, even if the
cleaner is operated for a long time, flow resistance of air passing
through the filter is reduced. Accordingly, a sudden deterioration
of a suction force of a cleaner is prevented from occurring so that
efficiency of a cleaner is remarkably improved.
[0058] As the present invention may be embodied in several forms
without departing from the spirit or essential characteristics
thereof, it should also be understood that the above-described
embodiments are not limited by any of the details of the foregoing
description, unless otherwise specified, but rather should be
construed broadly within its spirit and scope as defined in the
appended claims, and therefore all changes and modifications that
fall within the metes and bounds of the claims, or equivalence of
such metes and bounds are therefore intended to be embraced by the
appended claims.
* * * * *