JP4310954B2 - Cyclone dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cyclone dust collector, and more particularly to a cyclone dust collector for a vacuum cleaner.
[0002]
[Prior art]
In general, a cyclone dust collector is a device that swirls an air-fuel mixture containing dust and air, separates dust and air with mass by centrifugal force, and collects dust. Although cyclone dust collectors are used in various fields, they are mainly applied to household vacuum cleaners.
[0003]
For example, FIG. 10 is a cross-sectional side view showing a conventional cyclone-type dust separating apparatus described in Japanese Patent Publication No. 10-510757. In this prior art, a swirling flow is generated in the swirl chamber 13 by sucking dust and air from the air inlet 14 provided in the tangential direction of the frustoconical shape with respect to the swirl chamber 13 having a truncated cone shape. Due to this swirling flow, dust having mass is subjected to centrifugal force and pushed out to the side surface 15 of the swirling chamber 13. The dust that has moved to the side surface 15 of the swirl chamber 13 falls to the lower portion 16 of the swirl chamber 13 due to gravity. A conical opening 18 connected to the dust collecting chamber 17 is provided in the lower portion 16 of the swirl chamber 13, and the dust passes through the conical opening 18 due to gravity and stays in the dust collecting chamber 17. The air separated from the dust is swirled several times in the swirl chamber 13, and then drawn into the rising air current in the center of the swirl chamber 13, passes through the outlet 19, and escapes from the cyclone dust collector.
[0004]
FIG. 11 is a longitudinal sectional view of a cyclone dust collecting apparatus showing another conventional technique described in Japanese Patent Laid-Open No. 2000-157463. In this prior art, a swirling flow is generated in the cyclone body 20 by sucking dust and air from a suction port 21 provided in a tangential direction with respect to the cylindrical cyclone body 20. Due to this swirling flow, dust having mass is subjected to centrifugal force and pushed out to the side surface 22 of the cyclone body 20. The dust that has moved to the side surface 22 of the cyclone body 20 falls while rotating to the lower portion 23 of the cyclone body 20 due to gravity. The side 22 of the lower part 23 of the cyclone body 20 is provided with a contaminant discharge port 25 connected to the dust collection box 24, and the dust passes through the contaminant discharge port 25 due to gravity and centrifugal force and stays in the dust collection box 24. That's it.
[0005]
[Problems to be solved by the invention]
However, in such a conventional cyclone type dust collector, the centrifugally separated dust is stored in the dust collecting chamber by the action of gravity, so it is necessary to slow down the wind speed before entering the dust collecting chamber. Needed to be high enough. In addition, if a swirling flow with a high wind speed flows into the dust collection chamber, the dust stagnating in the dust collection chamber will be scattered again. Therefore, in order to prevent the dust from scattering, the wind speed immediately before entering the dust collection chamber. The swirl chamber had to be high enough. Therefore, in the conventional configuration, there is a problem that the entire apparatus becomes large, particularly when mounted on a vacuum cleaner used at home.
[0006]
SUMMARY OF THE INVENTION The present invention solves the above-described problems, and obtains a cyclone dust collector for a vacuum cleaner having a small dust size and a reduced pressure loss and a high dust collection efficiency. For the purpose.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is provided in a cylindrical swirl chamber for swirling dust and air, an air inlet formed in a tangential direction of the swirl chamber, and a central portion of the bottom surface of the swirl chamber. An exhaust port, a dust collection chamber provided adjacent to the side surface of the swirl chamber, and the swirl chamber and the dust collection chamber provided at a position overlapping with the intake port on the side surface of the swirl chamber in the swirl axis direction. A connecting hole that communicates with the dust collecting chamber on the upstream side of the swirl, and an inlet that returns from the dust collecting chamber to the swirling chamber on the downstream side of the swirl. It is a thing.
[0010]
Furthermore, the outlet of the connecting hole, while from the intake port 180 ° from 90 ° along the turning direction of the air from the point where the air flowing into the swirl chamber starts turning along the swirling chamber side At least one is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a perspective view of a cyclone dust collecting apparatus showing Embodiment 1 of the present invention, and FIG. 2 is a sectional view thereof. In the figure, 1 is a cylindrical swirl chamber in which sucked air swirls, 2 is an intake port formed in a tangential direction of the swirl chamber 1, 3 is a side surface of the swirl chamber 1, and 4 is an outer periphery of a side surface 3 of the swirl chamber 1. A cylindrical dust collection chamber 5 provided adjacent to the part is a connecting hole for communicating the swirl chamber 1 and the dust collection chamber 4. The intake port 2 and the connection hole 5 are provided so as to overlap with the swirl axis direction of the swirl chamber 1. 6 is a bottom surface of the dust collecting chamber 4, 7 is a mesh-like filter provided in the central portion of the swirl chamber 1, 8 is a bottom surface of the swirl chamber 1, and air from which dust has been removed is almost completely filtered by the filter 7 An exhaust port 9 for discharging from the swirl chamber 1 is provided. In the figure, arrows indicate the flow of air.
[0012]
When the vacuum cleaner is activated and the electric blower (not shown) is driven, air containing dust is sucked from the intake port 2 and swirls in the swirl chamber 1. At this time, centrifugal force acts on the dust having mass, and the dust is pushed to the side surface 3 of the swirl chamber 1. Then, the dust passes through the connecting hole 5 by centrifugal force and is pushed into the dust collecting chamber 4. At this time, part of the air flowing near the side surface 3 of the swirl chamber 1 also passes through the connecting hole 5 and flows into the dust collection chamber 4. However, the air that has flowed into the dust collection chamber 4 collects more dust than the swirl chamber 1. Since the space in the chamber 4 is larger, the chamber 4 swirls at a wind speed slower than the wind speed in the swirl chamber 1 and returns to the swirl chamber 1 through the connection hole 5. In addition, since the dust that has entered the dust collection chamber 4 acts on the gravity, it falls along the side surface of the dust collection chamber 4 and stays on the bottom surface 6 of the dust collection chamber 4. Since the wind speed is slow in the dust collection chamber 4, there is almost no re-scattering of dust stagnating on the bottom surface 6 of the dust collection chamber 4. On the other hand, the air that does not contain the dust swirling in the swirl chamber 1 soon loses swirl force, passes through the filter 7, and is discharged from the swirl chamber 1 through the exhaust port 9.
[0013]
As described above, the connection hole 5 is provided in the side surface 3 of the swirl chamber 1, and the intake port 2 and the connection hole 5 are provided so as to overlap with respect to the swirl axis direction of the swirl chamber 1. Can be configured.
[0014]
Moreover, in the prior art, since the exhaust port is provided in the upper part of the swirl chamber, an air passage must be provided in the upper part of the swirl chamber, which causes a problem that the entire apparatus becomes large. Further, when the blower motor is provided at a position lower than the cyclone dust collector, there is a problem that the air path between the blower motor and the cyclone dust collector becomes complicated and pressure loss increases. In the first embodiment, by providing the exhaust port 9 on the bottom surface 8 of the swirl chamber 1, when the cyclone dust collector is mounted on the vacuum cleaner, the blower motor is disposed on the bottom surface 8 side of the swirl chamber 1, thereby It can be simplified and shortened, and the pressure loss in the air passage can be reduced.
[0016]
Moreover, although the opening height of the connection hole 5 may be formed with the height substantially the same as the height of the turning chamber 1, it does not restrict to this.
[0017]
Embodiment 2. FIG.
FIG. 3 is a perspective view of a cyclone dust collecting apparatus showing Embodiment 2 of the present invention, and FIG. 4 is a sectional view thereof. In the figure, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Reference numerals 10 and 11 are connecting holes formed on the side surface of the swirl chamber 1 to allow the swirl chamber 1 and the dust collection chamber 4 to communicate with each other. By providing the connection holes 10, 11, the dust path and the air flow into the dust collecting chamber 4 from the connection hole 10 on the upstream side of the swirl, and the air returns from the connection hole 11 to the swirl chamber 1 on the downstream side of the swirl. Is formed.
[0018]
According to the second embodiment, by providing a plurality of connection holes, interference between the inflow air flowing from the swirl chamber 1 to the dust collection chamber 4 and the outflow air flowing from the dust collection chamber 4 to the swirl chamber 1 can be prevented. Therefore, the flow of air in the dust collection chamber 4 becomes smooth, and pressure loss due to air interference and turbulence is reduced. Moreover, it becomes difficult for the air flow in the dust collection chamber 4 to reach the lower part of the dust collection chamber 4, and dust re-scattering can be further reduced.
[0019]
Embodiment 3 FIG.
FIG. 5 is a perspective view of a cyclone dust collector showing Embodiment 3 of the present invention, and FIG. 6 is a sectional view thereof. In the figure, the same components as those in the first or second embodiment are denoted by the same reference numerals, and description thereof is omitted. A dust collection chamber 12 is provided so as to partially overlap the swirl chamber 1 in the swirl axis direction so as to surround the swirl chamber 1, and has an outer peripheral diameter larger than the diameter of the swirl chamber 1. In addition, a portion of the dust collection chamber 12 that does not overlap with the swirl chamber 1 has a central hollow cylindrical shape, and a cylindrical space X equivalent to the outer diameter of the swirl chamber 1 is formed. Reference numeral 5 denotes a connecting hole for communicating the swirling chamber 1 and the dust collecting chamber 12, and four holes are provided at equal intervals on the side surface of the swirling chamber 1 overlapping the dust collecting chamber 12. The air flowing into the dust collection chamber 12 from the connection hole 5 slowly turns along the upper side surface of the dust collection chamber 12 and returns to the inside of the rotation chamber 1 through the connection hole 5.
[0020]
According to the third embodiment, since the air flow path of the air flowing through the dust collection chamber 12 is formed on the upper side surface of the dust collection chamber 12, the air flow becomes smooth and pressure loss due to air interference and turbulence is reduced. Further, the air flow in the lower part of the dust collecting chamber 12 is reduced, and the dust re-scattering is reduced. Moreover, by making the diameter of the dust collection chamber 12 larger than that of the swirl chamber 1 and enclosing the dust collection chamber 12 around the swirl chamber 1, the flow of air flowing into the dust collection chamber 12 becomes smooth, and pressure loss Decrease. In addition, a plurality of connecting holes 5 for communicating the swirl chamber 1 and the dust collection chamber 12 can be provided at arbitrary positions on the side surface 3 of the swirl chamber 1. Furthermore, since the cylindrical space X is formed below the swirl chamber 1, a blower motor can be provided in the space X when mounted in a vacuum cleaner, and the air passage structure from the cyclone dust collector to the blower motor becomes easy. , Pressure loss can be reduced. Also, space efficiency is good.
[0021]
As shown in FIG. 7, if at least one of the connection holes 5 shown in the first to third embodiments is provided between 90 ° and 180 ° in the air swirling direction from the air inlet 2, dust collection performance is achieved. Will increase. That is, with this configuration, the dust sucked from the intake port 2 receives centrifugal force and gradually approaches the side surface 3 of the swirl chamber 1, and most of the dust is at a position near 90 ° in the swirl direction of the air from the intake port 2. It is pushed out to the side 3 of the swirl chamber 1. Since the wind speed near the side surface 3 of the swirl chamber 1 up to a position near 180 ° has a swirl speed necessary to press the dust, the position is 90 ° to 180 ° in the air swirling direction from the air inlet 2. By providing the connecting hole 5 in the dust collector, more dust is pushed into the dust collecting chamber, so that the dust collecting performance is improved.
[0022]
For example, when the diameter of the swirl chamber 1 is φ120 mm and the air volume is 1.0 m ³ / min, the relationship between the dust collection rate and the position of the connecting hole 5 is as shown in FIG. Also from this figure, it can be seen that if the connecting hole 5 is provided between 90 ° and 180 ° in the air swirling direction from the air inlet 2, the dust collection performance is improved.
[0023]
Embodiment 4 FIG.
FIGS. 9A and 9B are views for explaining the shape of the opening edge of the connecting hole of the cyclone dust collector showing the fourth embodiment. In the fourth embodiment, the connections shown in the first to third embodiments are shown. The shape of the opening edge 1a with which the swirling air in the hole 5 collides will be described. FIG. 9A shows a case where the opening edge 1a is not arcuate, and FIG. 9B shows a case where the opening edge 1a is arcuate. As shown in FIG. 9A, the opening edge 1a is formed in an arc shape, so that large dust swirling the swirl chamber 1 flows into the swirl chamber 1 or the dust collecting chamber without being caught by the opening edge 1a. Dust clogging is less likely to occur. Further, the air flowing into the dust collecting chamber is configured such that the opening edge 1a is formed in an arc shape, whereby the turbulence of the air when passing through the connecting hole 5 is reduced and the generation of wind noise can be prevented.
[0024]
【The invention's effect】
A cyclone dust collecting apparatus according to the present invention includes a cylindrical swirling chamber for swirling dust and air, an intake port formed in a tangential direction of the swirling chamber, an exhaust port provided in a bottom center portion of the swirling chamber, A dust collection chamber provided adjacent to the side surface of the swirl chamber, and a connection hole provided in a position overlapping the intake port on the side surface of the swirl chamber and the swirl axis direction to communicate the swirl chamber and the dust collection chamber The connecting hole is provided with an outlet that flows into the dust collecting chamber from the swirling chamber on the swirl upstream side, and an inlet that returns from the dust collecting chamber to the swirling chamber on the swirling downstream side. Can be forced into the dust collection chamber by centrifugal force, and the swirl chamber can be made thin.
[0026]
Furthermore, since at least one connecting hole is provided at a position shifted by 90 ° to 180 ° in the turning direction from the turning start point of the swirling flow, more dust can be collected during the first turning. Therefore, even with a cyclone dust collector with a thin swirl chamber and a small number of swirling dusts, the dust collection efficiency can be increased.
[0028]
[Brief description of the drawings]
FIG. 1 is a perspective view of a cyclone dust collecting apparatus showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a cyclone dust collecting apparatus showing Embodiment 1 of the present invention.
FIG. 3 is a perspective view of a cyclone dust collecting apparatus showing a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of a cyclone dust collector showing Embodiment 2 of the present invention.
FIG. 5 is a perspective view of a cyclone dust collecting apparatus showing a third embodiment of the present invention.
FIG. 6 is a cross-sectional view of a cyclone dust collecting apparatus showing a third embodiment of the present invention.
FIG. 7 is an explanatory diagram showing an application example of the embodiment of the invention.
FIG. 8 is a performance diagram showing the relationship between the dust collection rate and the position of the connecting hole.
FIG. 9 is a diagram for explaining the shape of a connection hole opening edge of a cyclone dust collector showing Embodiment 4 of the present invention.
FIG. 10 is a cross-sectional side view showing a conventional cyclone dust separation device.
FIG. 11 is a longitudinal sectional view of a cyclone dust collecting apparatus showing another conventional example.
[Explanation of symbols]
1 swirl chamber, 1a opening edge, 2 air inlet, 3 side, 4 dust collecting chamber,
5 communication hole, 6 bottom surface, 7 filter, 8 bottom surface, 9 exhaust port,
10 connecting hole, 11 connecting hole, 12 dust collecting chamber.

Claims (2)

A cylindrical swirling chamber that swirls dust and air, an intake port formed in a tangential direction of the swirl chamber, an exhaust port provided at a central portion of the bottom surface of the swirl chamber, and a side surface of the swirl chamber. Provided with a dust collection chamber, and a connecting hole provided in a position overlapping with the intake port on the side surface of the swirl chamber in the swirl axis direction to communicate the swirl chamber and the dust collection chamber,
The connection hole has an outlet for flowing into the dust collecting chamber from the swirling chamber on the swirl upstream side, and an inlet for returning to the swirling chamber from the dust collecting chamber on the swirling downstream side. apparatus. Wherein the outlet of the connecting hole, at least between the said air inlet of 180 ° from the 90 ° along the turning direction of the air from the point where the air flowing into the swirl chamber starts turning along the swirling chamber side The cyclone dust collector according to claim 1, wherein two cyclone dust collectors are provided.

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