JPH08322769A - Electric vacuum cleaner - Google Patents

Abstract

PURPOSE: To obtain an electric vacuum cleaner which has a small cyclone dust collector with a higher dust collection efficiency. CONSTITUTION: In this electric vacuum cleaner, a cyclone dust collector having a horn type cyclone 2 on a cylinder type cyclone 1 is arranged on the suction side of an electric blower. A link pipe 3 for linking both the cyclones 1 and 2 is formed on the center axis of both the cyclones 1 and 2 and an opening provided at the lower end of the link pipe 3 is positioned on a bottom part of the cylinder type cyclone 1 while the opening is provided with a spiral blade 16 to form a spiral flow in the link pipe 3 as opposite in direction to that in the cylinder type cyclone 1. An opening provided at the upper end of the link pipe 3 is positioned in the horn type cyclone 2 while being provided with a spiral blade to form a spiral flow in the horn type cyclone 2 as the same in direction as that of the spiral flow in the link pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner equipped with a cyclone dust collector.

[0002]

2. Description of the Related Art Conventional vacuum cleaners equipped with a cyclone dust collector include, for example, one disclosed in Japanese Patent Laid-Open No. 5-176871. FIG. 8 is a sectional view of a main part of a cyclone dust collector used in this electric vacuum cleaner. In FIG. 8, dirty air sucked through the suction port (not shown) of the electric vacuum cleaner is introduced into the outer cyclone 29 through the dirty air inlet 31.

Reference numeral 38 denotes an outer wall forming a horn type inner cyclone 30, and dirty air introduced into the outer cyclone 29 from the outer cyclone inlet 31 flows in along a tangential direction of an outer wall 39 of the outer cyclone 29. As a result, the cyclone flow is formed in the outer cyclone 29.

The cyclone flow formed in the outer cyclone 29 descends along the outer wall 39 of the outer cyclone 29, and then the descended cyclone flow forms an inverted horn outer wall formed on the collecting receiver 33. 40 and inner cyclone 30
It rises along the outer wall 38 and is supplied from the dirty air outlet 34 into the horn-type inner cyclone 30 through the flow passage 35. Dirty large dust such as fibrous dust in the air
While flowing through the outer cyclone 29, dust is collected and collected on the surface of the outer wall 40 of the inverted horn type.

Cyclone 3 inside the dirty air outlet 34
The cyclone flow of the dirty air introduced into the inside 0 flows along the inner surface of the outer wall 38 of the inner cyclone 30 where sandy dust is captured, and the sandy dust is discharged from the opening 41 formed at the lower end of the inner cyclone 30. Are collected in the collection receiver 33. The cyclone flow in the inner cyclone 30 is finally led out from the clean air outlet 32 formed at the upper end of the cyclone dust collector 37, cools the electric blower (not shown) provided on the intake side, and then is discharged to the outside. Is discharged.

[0006]

When the cyclone dust collector is double in the inside and outside as described above, the outer cyclone collects the fibrous dust, but the fibrous dust caught by the outer cyclone is extremely difficult. The dust collection volume efficiency of the outer cyclone at the dust collection regulation level L is poor because the dust is collected in a so-called loosened state.

Further, in the inside-outside double cyclone system, it is necessary to provide a flow passage from the dirty air discharge port 34 of the outer cyclone to the inner cyclone and a dirty air inlet on the outer circumference of the inner cyclone, and thus the cyclone dust collector 37 in the radial direction. There is a problem that the size becomes large. Further, since the collection receiver 33 of the inner cyclone is an inverted horn type, it is difficult for the user to dispose of dust.

In order to solve such problems, the present invention improves the dust collection volume ratio of fibrous dust, reduces the radial dimension of the cyclone dust collector, and simplifies the dust handling work of the user. The purpose is to achieve

[0009]

In order to achieve the above object, an electric vacuum cleaner according to the present invention is an electric vacuum cleaner in which a cyclone dust collector is provided on the intake side of an electric blower. A cylindrical cyclone that captures toxic dust,
A horn-type cyclone for trapping sandy dust provided in series above the tubular-type cyclone and stacked in series with the tubular-type cyclone. The tubular-type cyclone is on the intake side, and the horn-type cyclone is the electric motor. Use the configuration provided on the blower side.

Further, in the above electric vacuum cleaner, a connecting pipe having an opening for taking in air from the bottom of the tubular cyclone and an opening for exhausting into the horn cyclone are provided at the central axes of the swirling flows of the tubular cyclone and the horn cyclone. Is provided.

Further, in the above electric vacuum cleaner, a swirl vane for generating a swirl flow in a direction opposite to the swirl flow in the tubular cyclone is provided in the opening of the connecting pipe located at the bottom of the tubular cyclone, and the horn is provided. A swirl vane for generating a swirl flow in the same direction as the swirl flow in the connection pipe is provided in the opening of the connection pipe in the type cyclone.

[0012]

With this structure, the dirty air supplied from the suction port of the vacuum cleaner is first guided to the cylindrical cyclone located below, where the fibrous dust is collected. Next, the air containing sandy dust is guided to a horn-type cyclone located above, where the dusty sand is collected and discharged as clean air. In this case, since the tubular cyclone and the horn cyclone form a two-stage product in series, the axial shape of the cyclone can be miniaturized.

Further, since the dirty air in which the fibrous dust is captured by the tubular cyclone is discharged to the outside of the tubular cyclone through the opening of the connecting pipe formed at the bottom on the central axis of the tubular cyclone, The dust is collected in a donut shape around the connecting pipe at the bottom of the tubular cyclone. As a result, the doughnut-shaped fibrous dust itself acts as a filter to improve the efficiency of dust collection and reduce the axial length of the tubular cyclone. The dust collection efficiency can be improved by being compressed by the swirling flow flowing in the direction.

Further, the opening of the connecting pipe located at the bottom of the tubular cyclone is provided with swirl vanes for generating a swirling flow in the connecting pipe in a direction opposite to the swirling flow in the tubular cyclone. Although it easily passes through the openings, it becomes difficult for fibrous dust to pass through, and the dust collection effect of fibrous dust can be improved. In addition, since the swirl vanes are installed in the opening of the connecting pipe located in the horn type cyclone in the same direction as the swirling flow in the connecting pipe, the swirling flow in the horn type cyclone becomes the same direction as the swirling flow in the connecting pipe. The rotation is promoted, and the dust collection effect of sandy dust can be improved.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG.
1 is an overall configuration diagram of an embodiment of the present invention, in which 24 is a vacuum cleaner body equipped with an electric blower (not shown), 25 is a suction hose connected to the suction port of the vacuum cleaner body 24, and 26 is A cyclone dust collector composed of a tubular cyclone 1 and a horn cyclone 2 provided between the suction hose 25 and the extension pipe 27, and 28 is a suction port provided at the tip of the extension pipe 27.

FIG. 2 is a partially cutaway perspective view showing the structure of the cyclone dust collector 26, where 1 is a cylindrical cyclone.
Reference numeral 2 denotes a horn type cyclone stacked on the cylindrical cyclone 1 and has a dirty air suction port 6 of the cylindrical cyclone 1.
Is connected to the extension pipe 27, and the clean air outlet 10 of the horn cyclone 2 is connected to the suction hose 25.

Reference numeral 7 denotes a dirty air inlet passage provided on the outer peripheral wall of the tubular cyclone 1, the lower end of which serves as the dirty air suction port 6 and is connected to the extension pipe 27, and the upper end thereof is above the tubular cyclone 1. It is connected to the tubular cyclone inlet 8 provided in the. Cylindrical cyclone inlet 8 is dirty air inlet passage 7
The dirty air containing dust such as fibrous dust and sandy dust introduced into the tubular cyclone 1 is configured to form a swirling flow (cyclone flow) along the wall surface in the tubular cyclone 1. .

Reference numeral 3 denotes a connecting pipe penetrating through the central portions of the tubular cyclone 1 and the horn cyclone 2, and the lower end of the connecting pipe 3 is a tubular cyclone portion that is open at the inner bottom of the tubular cyclone 1 An outlet 4 is provided, the upper end of which terminates in the horn cyclone 2, and a horn type cyclone section dirty air inlet 5 that allows dirty air to flow into the horn cyclone 2 as a swirling flow is provided at this end.
Reference numeral 9 is a dust collector for a horn type cyclone that collects sandy dust captured by the horn type cyclone 2, and 10 is a clean air outlet for discharging clean air from the upper wall of the horn type cyclone 2. is there.

FIG. 3 is a view showing the flow of air in the cyclone dust collector shown in FIG. 2. The same parts as those in FIG. 2 are designated by the same reference numerals. In FIG. 3, 11 is a conical horn, 12 is a scroll type wall surface, 13 is a horn type dust collecting receiver for a cyclone, and 14 is a cylindrical dust collecting receiver for a cyclone.

Therefore, the extension pipe 2 is introduced from the suction port 28 shown in FIG.
When dirty air containing dust such as fibrous dust and sandy dust enters the dirty air suction port 6 of the tubular cyclone 1 shown in FIG. It is led to the entrance 8.

FIG. 4 is a partially cutaway perspective view showing the detailed structure of the tubular cyclone 1, and the same parts as those in FIGS. 2 and 3 are designated by the same reference numerals. The cylindrical cyclone inlet 8 is shown in FIG.
Since it is formed on the inner wall of the tubular cyclone 1 in a scroll shape as shown in, the dirty air guided to the tubular cyclone inlet 8 is discharged along the inner wall surface of the tubular cyclone 1 and inside the tubular cyclone 1. A swirl flow (cyclone flow) is formed. As a result, inside the tubular cyclone 1, the fibrous dust is separated by the centrifugal force due to the swirling flow, and the dirty air flow containing sandy dust is removed by the dirty air discharged from the tubular cyclone unit provided on the tubular shaft portion of the tubular cyclone 1. It is discharged from the outlet 4 to the connecting pipe 3.

FIG. 5 shows the dirty air discharge port 4 of the cylindrical cyclone unit.
It is a perspective view which shows the detailed structure of the part. The swirl vanes 16 provided at the dirty air discharge port 4 of the cylindrical cyclone unit are provided with a swirling flow direction 1 of the dirty air flowing in from the cylindrical cyclone inlet 8.
Since it is formed so as to open in the direction opposite to 7, the inflow direction 18 of the dirty air flowing into the cylindrical cyclone part dirty air discharge port 4 is opposite to the swirling flow direction 17 in the cylindrical cyclone 1. . Therefore, it is difficult to discharge the fibrous dust from the dirty air discharge port 4 of the cylindrical cyclone unit, but the dirty air containing sandy dust can be easily discharged into the connecting pipe 3. Reference numeral 15 in the figure denotes a pressing plate that closes the lower end of the connecting pipe 3.

Although the fibrous dust remaining inside the tubular cyclone 1 initially swirls in the circumferential direction of the dirty air discharge port 4 of the tubular cyclone portion in FIG. 2, the fibrous dust increases with an increase in the amount of dust collection. The dust is entangled with each other to form a donut shape having the dirty air discharge port 4 of the cylindrical cyclone portion as the inner diameter. When the fibrous dust is collected in the doughnut-shaped dust collecting receiver 14 for the cyclone shown in FIG. 4, the collected donut-shaped fibrous dust itself serves as a filter, and the fibrous property of the inflowing dirty air is increased. The dust can be more efficiently captured, and a part of the sandy dust can also be captured, so that the filter efficiency of the cyclone dust collector can be improved.

Further, in the embodiment of the present invention, since the cylindrical cyclone dirty air discharge port 4 is located on the bottom surface of the cylindrical cyclone 1, the fibrous dust is compressed by the pressure of the air flow from the upper part to the lower part. Therefore, the dust collection efficiency per unit volume can be improved.

Next, the dirty air containing sandy dust discharged from the dirty air discharge port 4 of the cylindrical cyclone section flows through the connecting pipe 3, and as shown in FIGS. 2 and 3, the horn type cyclone 2 is used.
It is discharged as a swirling flow into the horn type cyclone 2 from the dirty air inlet 5 of the horn type cyclone portion provided in the. FIG. 6 shows a detailed configuration of the horn-type cyclone section dirty air inlet 5.

In FIG. 6, reference numeral 20 denotes a swirl vane provided at the dirty air inlet 5 of the horn-type cyclone section.
0 is the dirty air discharge port 4 of the cylindrical cyclone part shown in FIG.
It opens in the direction opposite to that of the swirl vane 16 provided in. Therefore, the swirling flow 18 of the dirty air generated in the connecting pipe 3 by the swirl vanes 16 can be more effectively delivered to the inner wall surface of the horn-type cyclone 2 as the dirty air swirling flow 21 in the horn-type cyclone 2. The swirling speed of the dirty air can be increased. In addition, 19 in FIG. 6 is a pressing plate that closes the upper end of the connecting pipe 3.

The dirty air containing high-speed sandy dust sent from the horn-type cyclone section dirty air inlet 5 into the horn-type cyclone 2 is separated into sandy dust and air by the inner wall of the horn-type cyclone 1. Sandy dust falls on the inner wall of the horn-type cyclone while being affected by the downward gravity, which is perpendicular to the swirling flow, while increasing the swirling speed. Air rises because it is less affected by gravity like sand dust. Therefore, only clean air flows into the electric vacuum cleaner body 24 from the clean air outlet 10 shown in FIGS. 2 and 3 through the suction hose 25,
After cooling the electric blower (not shown), it is discharged to the outside.

On the other hand, the sandy dust that swirls and drops below the inner wall of the horn-type cyclone 2 is a horn-type cyclone dust collector 9 formed by a conical horn 11 shown in FIG. (Fig. 2).

FIG. 7 is a partially cutaway perspective view showing the detailed structure of the horn-type cyclone dust collector 9. The horn-type cyclone dust collector 9 includes a conical horn 11 having an increased inner wall circumference at the lower part of the horn-type cyclone 2 for stalling the swirling speed of sandy dust, and the stalled sandy dust. -Type cyclone dust collector 9 and a scroll-type wall surface provided inside the cylindrical wall 22 for collecting a sandy dust inside the cylindrical wall 22 so as to make a slow swirl in the dust-collecting outlet 23. It consists of 12.

Therefore, the sandy dust separated in the horn-type cyclone 2 collects at the dust collection outlet 23, and the dust collection for the horn-type cyclone shown in FIG. It is stored in the receiver 13.

The tubular cyclone 1 shown in FIG. 4 has an integral structure, and the fibrous dust contained in the tubular cyclone dust collecting receiver 14 and the horn-type cyclone dust collecting receiver 13 are provided. The sandy dust to be stored can be discarded by a simple operation of removing the tubular cyclone 1.

The present invention has been described above with reference to the embodiment in which the cyclone dust collector is provided in the extension pipe of the electric vacuum cleaner.
The installation location can be freely selected.

[0033]

As described above, according to the present invention, since the fibrous dust is collected by the lower tubular cyclone and the sandy dust is collected by the upper horn cyclone, the collection efficiency is high and It is possible to obtain electric cleaning equipped with a small cyclone unit in the cyclone radial direction, and since the central portion of the cyclone shaft of the tubular cyclone and the horn type cyclone is connected by a straight connecting pipe, there is little pressure loss and the cyclone radial direction. It is possible to provide an electric vacuum cleaner including the small cyclone unit.

Further, by providing a reverse swirl vane at the dirty air discharge port of the cylindrical cyclone (dirty air intake port of the horn type cyclone), it is possible to prevent fibrous dust from entering the horn type cyclone at the initial stage of dust absorption. In addition, since the dirty air outlet is provided at the bottom of the cylindrical cyclone, the dust collection efficiency can be improved by the compression effect of the wind pressure (suction) of the fibrous dust, and the filtering effect of the fibrous dust itself Can be improved. Further, a swirl vane is provided at the opening of the connecting pipe inside the horn cyclone, and a swirl flow for separating dirty air is formed at the axial center of the horn cyclone, so that the horn cyclone can be miniaturized.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an electric vacuum cleaner according to the present invention.

FIG. 2 is a partially cutaway perspective view of the cyclone dust collector used in the present invention.

FIG. 3 is an operation explanatory diagram of FIG. 2;

FIG. 4 is a partially cutaway perspective view of a tubular cyclone used in the present invention.

FIG. 5 is a perspective view showing a configuration of a main part of a tubular cyclone used in the present invention.

FIG. 6 is a perspective view showing a main configuration of a horn type cyclone used in the present invention.

FIG. 7 is a partially cutaway perspective view of a horn type cyclone used in the present invention.

FIG. 8 is an explanatory diagram of a main part of a conventional example.

[Explanation of symbols]

 1 Cylindrical cyclone 2 Horn type cyclone 3 Connection pipe 4 Cylindrical cyclone part dirty air discharge port 5 Horn type cyclone part dirty air inlet 16 Swirling blade 20 Swirling blade

Claims (3)

[Claims] 1. An electric vacuum cleaner in which a cyclone dust collector is provided on the intake side of an electric blower, wherein the cyclone dust collector is a tubular cyclone that captures fibrous dust, and a tubular cyclone is provided above the tubular cyclone. It consists of a horn type cyclone that collects sandy debris stacked in series with
An electric vacuum cleaner characterized in that the tubular cyclone is provided on the intake side and the horn cyclone is provided on the electric blower side. 2. A connecting pipe having an opening for intake from the bottom of the tubular cyclone and an opening for exhausting into the horn cyclone is provided at the central axis of the swirling flow of the tubular cyclone and the horn cyclone. The electric vacuum cleaner according to claim 1. 3. A connecting pipe in a horn-type cyclone, wherein a swirl vane for generating a swirling flow in a direction opposite to a swirling flow in the tubular cyclone is provided in the opening of the connecting pipe located at the bottom of the tubular cyclone, The electric vacuum cleaner according to claim 2, wherein a swirl vane for generating a swirl flow in the same direction as the swirl flow in the connecting pipe is provided in the horn-type cyclone in the opening.