Cyclone dust collecting apparatus for a vacuum cleaner

Details Cyclone dust collecting apparatus for a vacuum cleaner Cyclone dust collecting apparatus for a vacuum cleaner

2002-02-12

2003-09-23

Hopkins, Robert A. (Department: 1724)

Gas separation

With concentrate backflow or re-entrainment preventing means

Baffle intermediate concentrate collector zone and gas...

C055S459100

Reexamination Certificate

active

06623539

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a vacuum cleaner, and more particularly to a cyclone dust collecting apparatus for a vacuum cleaner that centrifugally separates dust entrained in air drawn into through a suction unit.
2. Description of the Related Art
FIG. 1
shows an upright-type vacuum cleaner, such as a vacuum cleaner
10
, adopting a cyclone dust collecting apparatus
40
. The conventional vacuum cleaner
10
includes a suction unit
30
, a cleaner body
20
having a fan motor (not shown) for generating suction power to the suction unit
30
, and passages
25
and
26
(shown in phantom) for connecting the suction unit
30
and the fan motor. In addition, the cyclone dust collecting apparatus for collecting separated dust after the drawn air is centrifugally separated, and for discharging the clean air, is disposed between the passages
25
and
26
to improve a dust collecting efficiency.
The conventional cyclone dust collecting apparatus
40
includes a cyclone body
41
, a suction pipe
48
, a discharge pipe
47
, and a dust collector
45
. The air drawn into the cyclone body
41
through the suction pipe
48
of the cyclone dust collecting apparatus
40
is centrifugally separated by whirling along an inner circumference of the cyclone body
41
. The separated dust from whirling air is collected in the dust collector
45
disposed at a lower part of the cyclone body
41
, and the clean air is discharged through the discharge pipe
47
to outside of the cyclone dust collecting apparatus
40
.
Here, as the centrifugal force generated when the air whirls, is greater, the whirling air drawn into the cyclone body
41
has a better dust separation efficiency. It is preferable that the air is guided in a direction tangential to a cylinder-type side wall for providing greater centrifugal force of the drawn air.
Accordingly, in the conventional cyclone body
41
, as shown in
FIG. 2
, an air inlet
48
a
connected with the suction pipe
48
is disposed at one side of a side wall of the cyclone body
41
, and the air inlet
48
a
is formed as an oval type along the side wall to guide the drawn air in the direction of tangential the side wall of the cyclone body
41
.
However, the conventional cyclone dust collecting apparatus
40
having the above construction encounters certain problems, described below.
As shown by the arrows in
FIG. 2
, the air drawn into the cyclone body
41
through the air inlet
48
a
whirls along the inner circumferential surface of the side wall. The whirling air flows to the air inlet
48
a
again after whirling one time along the inner circumference of the side wall.
In this case, air newly drawn into the cyclone body
41
through the air inlet
48
a
meets the air already flown past the air inlet
48
a
after being drawn into the cyclone body
41
and whirling in the cyclone body
41
. Accordingly, the current velocity of air newly drawn into the inside of the cyclone body
41
decreases. Not only the suction efficiency of the cyclone dust collecting apparatus
40
decreases, but also the centrifugal force of the drawn air, which whirls along the inner circumference of the cyclone body
41
, decreases. Therefore, a problem of a decrease in the dust collecting efficiency results, for example, the dust may flow back into the discharge pipe
47
together with the clean air.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a cyclone dust collecting apparatus for a vacuum cleaner having a structure so as to improve the dust collection efficiency by preventing the current velocity of air drawn into the cyclone body from being diminished.
The above object is accomplished by providing a cyclone dust collecting apparatus including: a cyclone body; a suction pipe connected with one side of the cyclone body in order to guide air, which has been drawn into the cyclone body through a suction unit,; and a discharge pipe for discharging clean having been centrifugally separated from entrained dust in the cyclone body to outside of the cyclone body. In addition, the suction pipe extends into the cyclone body so as to protrude into the cyclone body.
It is preferable that the cyclone body has: a suction pipe connected thereto; an upper wall connected to cover an upper end of the side wall; and a guide member for guiding the air, which whirls along an inner circumference of the cyclone body after being drawn into through the suction pipe, to underneath the suction pipe.
In addition, it is preferable that the guide member has a sloping side for connecting the lower side of the suction pipe with the upper wall placed at an upper part of the suction pipe, and the sloping side slopes downwardly in the direction of flow of the drawn air.
On the other hand, the upper wall is removably attached at the upper part of the side wall, and the guide member may protrude from a lower side of the upper wall.
According to the cyclone dust collecting apparatus having the above construction, the deterioration of the air suction force of the cyclone dust collecting apparatus is inhibited or prevented, thus the dust collecting efficiency will be improved.


REFERENCES:
patent: 3200568 (1965-08-01), McNeil
patent: 3288300 (1966-11-01), Bouchillon
patent: 3934990 (1976-01-01), Ide, III
patent: 663163 (1987-11-01), None
patent: 2738850 (1979-03-01), None
patent: 0815788 (1998-01-01), None
patent: 0965375 (1999-12-01), None
patent: 2000991 (1979-01-01), None
patent: 2189413 (1987-10-01), None
patent: 2342602 (2000-05-01), None
patent: 9835602 (1998-08-01), None

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