JP2020044306A - Tornado type centrifugal separator and electric vacuum cleaner - Google Patents

Abstract

To provide an electric vacuum cleaner that facilitates change in the configuration of a multi-stage centrifugal separator according to a user's use environment.SOLUTION: For the purpose of facilitating change in the configuration of a multi-stage centrifugal separator, a screw-shaped blowing-out port, that is a discharging port 7, is provided to the centrifugal separator in an air blowing-out pipe 3, and an air outlet port is provided in an extended direction, not toward the air inlet port, of the straight line going through the center of the air blowing-out pipe. In addition, the centrifugal separator is to be used in an electric vacuum cleaner.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vacuum cleaner employing a centrifugal separation method, and particularly to a tornado-type centrifugal separation method and a vacuum cleaner.

Conventionally, a vacuum cleaner called a cyclone method has been proposed and used. It is found in Patent Document 1 as old as it is and recently in Patent Document 2. In the centrifugal separation method adopted by these vacuum cleaners, a dust-mixed air outlet is provided along the inner wall of a cylinder or a conical cylinder, and a swirling air flow is generated to separate dirt and dust. Further, as shown in Patent Document 3, a centrifugal separator generally has a multi-stage configuration in order to deal with dust from a few centimeters in size to fine dust.

In general, when mainly sucking soy-like dust, pebbles and the like, it is better to reduce the number of stages of the centrifugal separator in order to increase the suction force. On the other hand, when sucking dandruff-like dust, it is desirable to increase the number of stages in order to increase the separation force. However, after the purchase, the configuration such as the number of stages of the centrifugal separator according to the use environment of the user cannot be changed.

Japanese Utility Model Publication No. 48-121151 JP 2018-117731 A JP-A-2006-013440 JP-A-2003-010083

The present invention has been made in view of the above-described conventional drawbacks, and has as its object to provide a vacuum cleaner that facilitates changing the configuration of a centrifugal separator according to a user's use environment.

In a conventional centrifugal separator, an air blowing pipe for generating a rotating air flow is provided along an inner wall from a direction perpendicular to a central axis of a cylinder or a conical cylinder. Therefore, when the centrifuge has a multi-stage configuration, pipe connections between the stages are complicated, and the configuration cannot be changed by the user.

In order to solve such difficulties, the present invention provides an air outlet pipe with an object having a screw-shaped outlet, and further provides an air suction / discharge port with a straight line passing through the center of the air outlet pipe so as to facilitate a multi-stage configuration. We propose a centrifugal separator installed in the extension direction, not the air inlet. Furthermore, the present invention proposes a vacuum cleaner provided with connecting portions at the upper portion and the lower portion of the centrifugal separator, allowing the centrifugal separator to be selectively configured in multiple stages, and including these centrifugal separators.

Therefore, when the centrifugal separator has a multi-stage configuration, it is easy to change the configuration according to the user's use environment.

Principle explanatory diagram of the centrifugal separator according to the present invention Various screw-shaped objects Selective multi-stage vacuum cleaner using the centrifugal separator of the present invention Centrifugal separator combining the centrifugal separator of the present invention with a conventional centrifuge

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

When the rectangle is rotated 180 degrees around the central axis, the three-dimensional figure obtained by rotating the trapezoid 180 degrees around the central axis is a trapezoid in the present invention so that the three-dimensional figure drawn by each side becomes a cylinder. It is called a cylinder (2a in FIG. 1).

FIG. 1A is a schematic diagram of a centrifugal separator according to the present invention. In order to centrifuge debris and dust from air containing debris and dust, it is necessary to generate a swirling airflow. In the present invention, as a means for generating a swirling airflow, a screw-shaped air outlet 6, that is, an air outlet is attached to the air outlet pipe 3. However, the screw-shaped object 6 itself does not rotate like a ship screw.

As can be seen from FIGS. 1 and 2, the air outlet of the screw-shaped object reaches not only the pipe end but also near the central axis of the pipe. This point is important, and the direction in which air is released from the screw-shaped object is widely distributed from the direction of the center axis of the pipe, that is, from the direction of the discharge port 1 to the wall of the dust collector 2a. The air emitted from near the center of the screw-shaped object goes toward the discharge port 1, and the air emitted from the end of the screw-shaped object, that is, near the wall of the pipe, once goes to the wall of the dust collector 2a and collects dust. After hitting the wall of the vessel, it will head towards the outlet 1 along the wall. Due to the distribution of the emission direction as described above, the amount of air flowing toward the outlet 1 along the dust collector wall is smaller than the total amount of emission, and the wind force is relatively weak.

When air containing dust passes through the pipe 3, it is swirled by the stationary screw-shaped object 6. Due to the centrifugal force associated with the turning, dust is biased toward the wall of the pipe even in the pipe, so that when the dust is discharged from the screw-shaped object, it goes toward the wall of the dust collector 2a. That is, of the above widely distributed discharge directions, the direction of the discharge port 1 is clean air, and the direction of the dust collector wall is a dusty air flow, which is swirled and discharged into the trapezoidal cylinder 2a which is a dust collection chamber.

The released dust collides with the wall of the trapezoidal cylinder due to the inertia at the time of being released, or rotates along the wall of the trapezoidal cylinder due to the centrifugal force of the swirling airflow. As described in paragraph 0013, the wind force of the air flowing toward the discharge port 1 along the dust collector wall becomes relatively weak, and the trapezoidal cylinder 2a is inclined, so that the dust is trapped in the trapezoidal cylinder 2a. The direction of the trapezoidal cylinder after it collides with and bounces toward the bottom of the trapezoidal cylinder (direction in which the diameter of the trapezoidal cylinder is larger, that is, the direction opposite to the discharge port 1) is likely to be directed. Dust circulating along the wall of the trapezoidal cylinder also tends to take a large radius trajectory due to centrifugal force. (In the direction of larger diameter, that is, in the direction opposite to the discharge port 1).

As a result, the dust is directed toward the bottom of the trapezoidal cylinder (the side opposite to the air discharge port 1) and accumulates. If the accumulation speed does not need to be emphasized, the dust may be eventually accumulated by the action of gravity. Therefore, the dust may be a cylinder instead of a trapezoidal cylinder. The clean air separated from the refuse is discharged from the discharge port 1.
The dust accumulated in the trapezoid tube serving as a dust collector can be discarded by turning the trapezoid tube 2a and releasing from the screw-in 8b.

Note that the threaded portion is not limited to the lower and upper bottoms of the trapezoid tube only for discarding accumulated dust. Although not shown, a trapezoidal tube may be provided with an opening / closing window on the side surface.

In the present invention, a centrifugal separator using a screw-shaped air outlet or discharge outlet is referred to as a tornado centrifugal separator. In addition, although the term “tornado method” is found in Patent Document 4, the mechanism is different from that of the present invention.

FIG. 2 shows various screw-shaped objects. The number of outlets, that is, the number of outlets, is, for example, one in (a), two in (b-1), and four in (c). FIG. (B-2) shows a single outlet having the same effect as the two outlets (b-1) formed by twisting the pipe itself around the central axis of the pipe.

It is important that the pipe be twisted instead of simply bent. It is easy to simply bend the end of the pipe along the cylinder wall so that a swirling airflow is generated. However, since the blown air does not have the distribution as described in paragraph 0013 and almost goes to the dust collector wall, the wind force directed to the discharge port 1 along the dust collector wall becomes strong. Therefore, the amount of dust flowing to the discharge port 1 increases, and the degree of separation of dust decreases.

FIG. 2 (d) not only simply bends but also has a distribution similar to the air distribution described in paragraph 0013. As shown in FIG. 2D, from the middle of the tip of the pipe 21 being bent in a swirling shape (bending in the direction in which air is to be swirled), as it approaches the tip, the center of the pipe turning center (the center of the pipe before bending). ) Is gradually removed (from 24a to 24b) so as to be gradually widened (from 24a to 24b) (the last part removed by 23) to form a screw-shaped object. Dotted line 22 indicates the shape of the remaining pipe cross section. Due to the effect of the centrifugal force, dust flows into the dust collecting chamber along the remaining pipe, and clean air flows into the discharge port 1 from the gap from which the pipe has been removed.

In the case of FIG. 2B-2, the twisted portion becomes a screw-shaped object. The shape and thickness of the blow-out pipe, such as the shape and size of the screw-like object in FIG. 2 and the number of outlets, are not limited to those in FIG. 2, and the manner of coupling the blow-out pipe and the screw-like object is not limited to FIG.

In order to facilitate the multi-stage construction of the centrifugal separator, as shown in FIG. 1, the air outlet 1 was attached to a straight line passing through the center of the air blow-off pipe 3 in an extension direction other than the air inlet direction 5. By doing so, the position of the discharge port becomes the same as the position of the inflow port of the next stage, and the connection between the stages becomes easy. As a further advantage, the direction of the exhaust airflow is parallel to the direction of the incoming airflow at the next stage, so that the frictional resistance of the airflow is reduced.

Further, a coupling portion is provided on an upper portion and a lower portion of the trapezoidal cylinder as a dust collector. In FIG. 1, the upper and lower portions of the centrifugal separator are provided with screw-type coupling portions 8a and 8b (not shown, but also on the back side of 8b, that is, on the air inflow side, screws 8a corresponding to male and female are provided. ).

FIG. 3 shows a vacuum cleaner in which the above-described centrifugal separator has a multi-stage configuration. As described above, since the exhaust port is the inlet of the next stage, the multistage configuration is easy. In FIG. 3, reference numeral 2a denotes one outlet, 31 and 32 each denote two outlets, and 34 denotes a filter such as a nonwoven fabric. According to the use environment, one outlet and a nonwoven fabric filter can be selected to form a two-stage configuration, or one outlet, two outlets and a nonwoven fabric filter can be selected to form a three-stage configuration. Thus, a vacuum cleaner in which the user can freely configure the centrifugal separator in multiple stages can be provided.

FIG. 1B shows a centrifugal separator modified from FIG. 1A and an example of a two-stage configuration. As shown in FIG. 1B, the trapezoidal cylinder 2a in FIG. 1A was replaced with cylinders 105a and 105b, and instead, trapezoidal cylinders 104a and 104b without bottom were attached. When it is not necessary to attach importance to the accumulation speed of the dust, only the cylinder or the like may be used because only the cylinder is used and the dust acts on the dust to accumulate.

In FIG. 1 (b), for example, when the centrifugal separator is fixed in a two-stage configuration, the pipe and the screw-shaped object may be screwed so that the user can freely exchange screw-shaped objects having different numbers of outlets.

In order to clean the centrifugal separator itself, the dust collector, the blow-out pipe, and the screw-shaped object may be screwed, fitted, or the like so that they can be disassembled and assembled.

When the dust is clogged, the dust collector, the blow-out pipe, the screw-shaped object, etc. may be all transparent in order to find the clogged portion and make it cheap.

As shown in FIG. 1B, coarse meshes 102a and 102b may be provided to prevent clogging of dust in the screw-shaped object.

Further, the threaded portions 8a and 8b for connection shown in FIG. 1A are referred to as a fitting type, or a "locking stopper" or a "patch lock" as shown at 103 in FIG. 1B. However, the present invention is not limited thereto.

If the discharge pipe 100 is connected to a suction hose of a conventional nonwoven fabric filter-type vacuum cleaner, the centrifugal separator shown in FIG. 1B can be used as a vacuum cleaner in which clogging of the nonwoven fabric filter is difficult.

FIG. 4A shows an example of a centrifugal separator in which the first stage is a conventional cyclone type centrifugal separator 41a, and the centrifugal separator of the present invention is connected to the second stage 40a and thereafter.

FIG. 4 (b) is also an example of a serial configuration, but is an example of a centrifugal separator in which a centrifugal separator 40b of the present invention is connected to the inside of a cyclone type 41b.

INDUSTRIAL APPLICATION This invention is utilized in the industry which manufactures a vacuum cleaner.

DESCRIPTION OF SYMBOLS 1 Air exhaust port 2a Trapezoidal cylinder 3 which is a dust-collecting chamber 3 Blow-out pipe 5 Inlet of air containing dust 6 Screw-shaped object having an air discharge port, ie, an air discharge port 7 Air discharge port, ie, air discharge ports 8a, 8b Screw-in 20. A screw-like object in which the pipe itself is twisted around the central axis of the pipe. The portion having a gap formed by turning it in a spiral shape has a screw-shaped object 22. The pipe is gradually and widely removed, and the shape of the cross-section of the remaining pipe 23 is an empty area where the pipe is partially removed, that is, an air outlet. 24a, 24b End of removed area, ie, end of remaining pipe 31 Centrifugal separator 32 with two outlets Same as above 31 Centrifugal separator 33 with two outlets 33 Separation by nonwoven fabric filter or the like Device 34 Non-woven fabric filter etc. 35 Air suction / discharge device consisting of a motor etc. 36 Dust suction ports 40a, 40b Tornado type centrifugal separators 41a, 41b Cyclone type centrifugal separator 100 Air discharge pipe 101a Incoming air flow direction 101b Outgoing air flow direction 102a, 102b Coarse mesh 103 etc. "Lid stopper with lock", "Patchin lock" 104a etc. , 104b Trapezoidal cylinders 105a, 105b without bottom

Claims (2)

In a vacuum cleaner having a centrifugal separator provided with an air outlet to generate a swirling air flow and separating an object mixed with air by a centrifugal force accompanying the swirling of the air flow, the swirling shape of the centrifugal separator A centrifugal separator and a centrifugal separator, wherein a screw-shaped object is attached to an air blow-off pipe as a means for generating an air flow, and a straight line passing through the center of the air blow-off pipe and an air outlet is provided in an extension direction other than the air inlet Vacuum cleaner with separation device.   An electric apparatus comprising the centrifugal separator according to claim 1, wherein the upper and lower parts of the centrifugal separator are provided with connecting portions, and the centrifugal separator can be selectively configured in multiple stages and the centrifugal separator can be selectively configured in multiple stages. Vacuum cleaner.

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