JPS61191329A - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum suction cleaner, and in particular to the EPC disclosed
The present invention relates to a domestic portable vacuum cleaner of the type described in specification no. 0018197.

EPC specification 0018197 describes a vacuum cleaner in which a cleaning head for contacting a dirty surface is coupled inside a casing in which an air flow is created by a motor-driven fan. The casing houses two cyclone units in series, which are operated in sequence to separate and collect dirty particles (dust and other foreign matter) from the airflow passing therethrough.

The advantage of such types of vacuum cleaners with cyclone units is that they do not require garbage bags, since the emission of dust from the vacuum cleaner can be eliminated by separating and removing the cyclones from the surrounding casing. be. Another advantage is that the air discharged from the vacuum cleaner is largely dust-free, thus eliminating the need for the use of a filter as the primary cleaning element.

In the vacuum cleaner described in said EPC patent application,
The two cyclone units each have a substantially frustoconical body. Such a shape keeps the dust particles swirling within it and thus allows the cyclone to collect fine dust particles of small diameter. Such a cyclone unit with means for maintaining the velocity of fine dust particles will be referred to herein as an "E-high efficiency" cyclone.

The present invention is useful when a vacuum cleaner equipped with only the highly efficient cyclone necessary to treat fine particles is used to suck up dust particles and other external materials of larger dimensions, as in a normal household. is based on the recognition that it does not necessarily operate sufficiently. Particles of such large dimensions are maintained in a spiral or circular motion and tend to move or cluster toward the central area of the cyclone, and thus do not accumulate. The result is noise and interference with effective operation of the cyclone.

Therefore, the present invention provides for the airflow path to be located upstream of the high-efficiency cyclone unit with respect to the clean air intake.
It is proposed to have a carefully configured cyclone with lower efficiency.

This "low efficiency" cyclone is not fully capable of effectively treating the finest particles, i.e., particles 50 microns or smaller, but it does collect some, if not all, of those microscopic particles. to temporarily clean the air stream. The high efficiency cyclone then operates at optimum conditions with its relatively clean air and only particles of very small size.

Low efficiency stops truncated cones and e.g. cyclones
This can be achieved by providing a cylindrical casing with a conventional tangential or scroll air intake near its lower end.

Thus, in a suitable and preferred form, the vacuum cleaner casing comprises a generally cylindrical "low-efficiency" cyclone with a clean air intake and a "high-efficiency" cyclone located concentrically within the low-efficiency cyclone. Equipped with ``Efficiency'' cyclone,
A passageway then directs air from the low-efficiency cyclone to the upper portion of the high-efficiency cyclone. The cleaned air is then drawn from the center of the high-efficiency cyclone and exhausted through a final filter if necessary.

The present invention will now be described in detail with reference to the accompanying drawings.

The illustrated vacuum cleaner includes a main casing 1 . Although this casing can be used in either vertical or horizontal configuration, it is shown in the vertical configuration in the drawings, and the following description of the function of the vacuum cleaner also proceeds in this vertical configuration. A cleaning head 2 is provided at the lower end of the casing. this head 2
comprises a motor-driven fan unit 3 and a laterally extending elongated brush member 4 connected to the shaft of the motor by a belt 5. The vibro extends vertically along the back of the casing. This pipe can be used as a handle or connected to other suction tools. Between the vibro and the upper end of the casing there is a holder for an electrical cable 7 extending to its upper end and a vacuum cleaner on-off switch 8. The electrical equipment of the vacuum cleaner is not part of the present invention and will not be further described. The vacuum cleaner in vertical mode runs on wheels 9'c.

The dirty air entering the vacuum cleaner from behind the brush 4 is
As best shown in the figure, the clean air flows from the square inlet 1o into a passageway 11 defined by a semicircular sleeve 12 (see FIG. 3) in the casing 1. A first cyclone with low efficiency is installed coaxially in the center of the casing 1.
A cylindrical casing 13 of the unit is slidably fitted within the sleeve 12. The upper end of the clean air passageway 11 is tangentially connected to the upper part of the casing 13 by a port 14, thereby creating a swirling cyclone-like flow of air.

The high efficiency cyclone unit has a frustoconical body portion 15;
A cylindrical portion 16 is provided depending from this. The end of this cylindrical section abuts against a support plate 17 on the base of the low efficiency cyclone casing 13. Feed pipe 1 from inside the low-efficiency cyclone to the high-efficiency cyclone
9 extends on the outside of the conical body 15 to the tangential inlet 18 .

The high-efficiency cyclone connit can be removed upwardly from the low-efficiency cyclone unit, and a flexible bearing seal 2° is provided between the two units.

The upper end of the high-efficiency cyclone is opposite the clean air passageway 11 of the cleaner and leads into a passageway 21 defined between the sleeve 12 and the vacuum cleaner outer casing 1. The lower end of this passage connects to the exhaust through a motor fan.

Next, regarding the cleaning operation of the present invention, casings 1 and 2
Reference will be made to the airflow indicated by various arrows indicating the sequential flow of clean air through the interior of the two cyclone units. Here arrow -11 indicates clean air, -← indicates air purified by low efficiency cyclone, -111 indicates air purified by high efficiency cyclone, and ----→ indicates the air finally released. When the brush 4 is rotated and the vacuum cleaner is operated by creating a suction force by the motor/fan 3, clean air carrying dust and other particles is drawn into the inlet passage 11. This dust particle-laden air flow enters the upper part of the low-efficiency cyclone casing 13 tangentially from the mouth 14 and performs a generally cyclonic swirling motion along the line of the arrow, thereby causing the low-efficiency cyclone Most of the dust particles in the lower part accumulate as shown at A. The airflow carrying only the finer particles then flows through the tube 19 and the inlet 18 under the action of the general airflow created by the fan.
tangentially into the high-efficiency cyclone unit, where the cyclonic cleaning process is repeated again with higher efficiency and greater particle velocity, thereby accumulating finer particles as in B. do. The finally cleaned air thus rises under the action of the airflow into the upper part of the high-efficiency cyclone, then returns through the clean air delivery passage 21 to the motor fan and, if necessary, through a final filter. released.

To remove dust particles from the vacuum cleaner, the low and high efficiency cyclone casings are removed upwards and the two casings are separated from each other. It can be seen that the cylindrical casing 13 collects and retains all the particles since when the high efficiency cyclone casing 16 is lifted by the seat on the base of the low efficiency cyclone casing 13, the contents within the casing 16 fall out. . A disposable liner can also be provided within the low efficiency cyclone casing if desired.

Although not shown, a device for manually throttling the inlet or outlet tube of the high efficiency cyclone may be provided. Therefore, if the inlet or outlet orifice of the cyclone is made smaller, the suction pressure will be lower but the separation efficiency will be higher. When used in horizontal mode, a valve is provided, as shown schematically at 22, which can be turned to close the air flow from the brushes or to open the air passage to the vibro. It will be done like this.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view taken along line II in Figure 2, Figure 2 is a front cross-sectional view taken along line ■-■ in Figure 1, and Figure 3 is a cross-sectional side view taken along line II in Figure 2.
It is a sectional view seen upward from the -ytn line. 1... Vacuum cleaner main casing, 2... Cleaning head, 3
...Motor/fan, 4...Brush, 6...Pipe, 1o...Dirty air intake, 11...Transporter passage, 12...Sleeve, 13...Low Efficiency cyclone unit casing, 14...Same inlet, 1
5...High efficiency cyclone unit truncated conical body part,
16... Same cylindrical portion, 18... Same inlet port, 19...
...Same inlet pipe, 20...Support seal, 21...Clean air delivery passage, 22...Valve.

Claims (2)

[Claims] (1) An outer cyclone having a bottomed cylindrical cyclone casing, the cyclone casing having an inner surface that acts as a waste rotation surface, forming a constant cross-section inside for the outer cyclone over the entire length, and an upper part away from the bottom. A casing provided near the top of the cyclone casing, which supplies dirty air in a tangential direction to its inner surface, having a first passage guided by the casing to an inlet of the dirty air at the top of the cyclone casing remote from the bottom. an inner cyclone provided inside the outer cyclone and having an upper end and a lower end smaller than the upper end; an opening at a bottom end remote from the cyclone, the inner cyclone having an opening from the second passage for supplying air tangentially to the inner surface of the inner cyclone;
An air outlet is provided near the top of the outer cyclone for the exit of clean air from the inner cyclone, the inner cyclone being separated from the air flow relationship leading to the outer cyclone except for the air inlet of the inner cyclone; a dependent part located at the opening at the lower end and extending to the bottom of the outer cyclone for collecting dirt from the inner cyclone, causing an air flow to pass through the outer cyclone first through the first passage to remove large dirt particles; a fan device driven by a motor, the fan device being passed through an internal cyclone through a second passageway to remove small dirt particles and removed through a third passageway as clean air; and a dirt pickup device connected to said first passageway. A vacuum cleaner characterized by: (2) The vacuum cleaner according to claim 1, wherein the inner and outer cyclones are provided concentrically.