Gas separation – With separated gas outflow control – Baffle or flow guide
Reexamination Certificate
2002-02-22
2004-03-09
Hopkins, Robert A. (Department: 1724)
Gas separation
With separated gas outflow control
Baffle or flow guide
Reexamination Certificate
active
06702868
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cyclone dust-collecting apparatus for a vacuum cleaner, and more particularly to a grill assembly of a cyclone dust-collecting apparatus for a vacuum cleaner capable of preventing backflow of filth into a vacuum-generating device.
2. Description of the Related Art
FIG. 1
shows one example of a conventional cyclone dust-collecting apparatus for a vacuum cleaner. According to
FIG. 1
, conventional cyclone dust-collecting apparatus
10
for a vacuum cleaner includes cyclone body
20
, filth-collecting portion
30
, and partition
40
.
Air-suction passage
21
, connected to a brush assembly (not shown) of the vacuum cleaner, is disposed at the upper part of cyclone body
20
. Air is drawn in through air-suction passage
21
. The air forms a whirling air current while being drawn in a tangential direction to cyclone body
20
.
Air-discharging passage
22
, connected to a vacuum-generating device (not shown) of a vacuum cleaner, is disposed at the upper center of cyclone body
20
. Grill
23
is disposed at the inlet of air-discharging passage
22
to prevent filth, e.g. hair, from being drawn to the vacuum-generating device.
As shown in
FIG. 2
, a plurality of passages
24
are formed through grill
23
for cleaned air to be drawn to the vacuum-generating device. The reference character A designates a streamline of a whirling air current of cyclone body
20
.
For conventional cyclone dust-collecting apparatus
10
for a vacuum cleaner with the construction above, when the vacuum-generating device of the vacuum cleaner is operated, the air containing filth from a cleaning surface is drawn to cyclone body
20
through air-suction passage
21
.
The air drawn into cyclone body
20
forms a whirling air current and filth in the air is collected in filth-collecting portion
30
by being separated by centrifugal force of the whirling air current. The cleaned air is transferred to the vacuum-generating device through passages
24
of grill
23
and air-discharging passage
22
.
On the other hand, filth, which has not been separated from the air current, passes through grill
23
with the air through passages
24
. The filth in the air flows through air-discharging passage
22
to the vacuum-generating device with a filter (not shown) at the upper part therein.
The filth is separated and filtered from the air in the filter, and the cleaned air is discharged to the vacuum cleaner through the vacuum-generating device. The filth clogs passage holes of the filter, thus the dust-collecting capability of the vacuum cleaner is decreased.
SUMMARY OF THE INVENTION
An embodiment provides a grill assembly of a cyclone dust-collecting apparatus for a vacuum cleaner capable of improving the dust-collecting capability of the vacuum cleaner. The grill assembly may improve the dust-collecting capability by reducing the amount of filth drawn to a vacuum-generating device through the grill.
The grill assembly of the cyclone dust-collecting apparatus for the vacuum cleaner may be disposed at an inlet of an air-discharging passage of a cyclone body. The cyclone body separates filth from a whirling air current by centrifugal force. The whirling air current may prevent filth from being drawn into the vacuum-generating device of the vacuum cleaner. The cyclone body may include a grill body and a plurality of passages formed therein. An extended centerline of the passages forms an acute angle with a streamline of the whirling air current.
A separate shielding member, removably connected to the grill body, may shield an end of an upper part of the grill body. The shielding member may also convert an advancing direction of the filth in the air transferred to the grill body to the whirling air current.
In another embodiment, the grill assembly may include a plurality of blades disposed a predetermined distance apart such that the air may be transferred along an outer circumference of the grill body. A centerline of the blades forms an acute angle with a streamline of the whirling air current.
The predetermined distance between the blades and the angle between the blades and the streamline of the whirling air current may be determined such that there is about 10% to about 50% of overlapping shade between adjacent blades when the blades are projected onto an imaginary cylinder coaxial with the blades.
REFERENCES:
patent: 964428 (1910-07-01), Johnson et al.
patent: 2071975 (1937-02-01), Holm-Hansen et al.
patent: 6195835 (2001-03-01), Song et al.
patent: 9945403 (2000-06-01), None
patent: 9938769 (2001-03-01), None
patent: 2330786 (1999-05-01), None
patent: 11290724 (1999-10-01), None
patent: 1011272 (1983-04-01), None
patent: 1524931 (1989-11-01), None
patent: WO9922872 (1999-05-01), None
patent: WO9922873 (1999-05-01), None
patent: WO9922874 (1999-05-01), None
Oh Jang-keun
Park Jung-seon
Hopkins Robert A.
Samsung Gwangju Electronics Co. Ltd.
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