JP2014144169A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner which effectively uses a centrifugal force and in which dust separation performance is improved.SOLUTION: A vacuum cleaner includes: an electric blower disposed in a body; and a dust collection container for collecting and accumulating dust contained in the air sucked by the electric blower. The dust collection container is configured by: a dust collection case having a suction port and a dust collection part for accumulating dust and in which a surface facing the suction port is open; a dust separation part for separating the air containing dust into dust and the air excluding the dust; and a lid body blocking the opening of the dust collection case. The dust separation part is configured by: an introduction port communication part communicating with the suction port; a turning part for centrifugally separating the air into the dust and the air excluding the dust by turning the air containing dust; and a cylindrical part having an air intake port and an air exhaust port where the air in which the dust is removed passes through. The arrangement is such that a rotational axis direction of the electric blower and an axial direction of the cylindrical part become parallel with each other. The turning part is made to turn the air at the outer periphery of the cylindrical part, and the direction of the turning part turning the air and the rotational direction of the electric blower are made to be the same rotational direction.

Description

  The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner provided with a cyclone type dust collecting container.

  A conventional vacuum cleaner equipped with a cyclone type dust collecting container is provided with a separation chamber for separating dust from air containing dust in the vertical direction, and the air is sucked by an electric blower provided in the horizontal direction. It is known what separates. The air swirled to separate the dust from the air containing the dust and applied with centrifugal force flows in the vertical direction, and is orthogonal to the flow of air sucked by the electric blower provided in the horizontal direction. (For example, refer to Patent Document 1).

JP 2010-268876 A (page 4, FIG. 4)

  However, in conventional vacuum cleaners, air that is swirled to separate dust from air containing dust and applied centrifugal force flows vertically, and is orthogonal to the flow of air sucked by the electric blower. When the air is sucked from the separation chamber, the centrifugal force generated by the rotation of the electric blower is eliminated and only the suction force is lost. Therefore, the centrifugal force generated by swirling the air to separate dust is generated by the rotation of the electric blower. There is a problem that the generated centrifugal force does not contribute effectively.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vacuum cleaner that effectively utilizes centrifugal force and improves dust separation performance.

  A vacuum cleaner according to the present invention that solves the problem includes an electric blower disposed in a main body, and a dust collecting container that collects and accumulates dust contained in air sucked by the electric blower. The container has a suction port and a dust collecting part for collecting dust, a dust collecting case having an opening facing the suction port, and a dust separating part for separating the dust-containing air into the air excluding the dust and the dust And a lid that closes the opening of the dust collection case rotatably provided in the dust collection case, and the dust separation part communicates with the inlet communication part that communicates with the suction port and the inlet communication part , A swivel unit that swirls air containing dust and centrifuges into air excluding dust and dust, and a cylindrical part that is disposed in the swivel unit and has an intake port and an exhaust port through which the air excluding dust passes The rotating shaft direction of the electric blower and the axial direction of the cylindrical part are arranged in parallel. And, swivel part is adapted to pivot the air in the outer periphery of the cylindrical portion, the direction for turning the air of the turning portion, in which the rotational direction of the electric blower has the same direction of rotation.

  According to the present invention, the rotating shaft direction of the electric blower and the axial direction of the cylindrical portion are arranged in parallel, and the swirling portion swirls air around the outer periphery of the cylindrical portion. Since the turning direction and the rotation direction of the electric blower are the same, the centrifugal force generated by the rotation of the electric blower is added to the centrifugal force of the air turning in the same rotation direction. Therefore, the separation performance of dust from the air containing dust can be improved.

1 is an external perspective view showing a vacuum cleaner according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view of the electric vacuum cleaner according to Embodiment 1 of the present invention as viewed from the side surface direction. 1 is an external perspective view showing a dust collecting container of a vacuum cleaner according to Embodiment 1 of the present invention. It is a perspective view which shows the open state of the cover body of a dust collecting container. It is the perspective view which cut a dust collection case partially so that the principal part in a dust collection container could be seen. It is an external appearance perspective view of the dust separation part contained in a dust container. It is an external appearance side view of the dust separation part enclosed in a dust collecting container. (A) The schematic diagram which represented the rotating shaft of the electric blower, and the axial direction of a cylindrical part for convenience, (b) The schematic diagram which represented the rotational direction of the electric blower and the turning part for convenience. It is the figure which looked at the dust collecting container except the lid from the lid side. It is the perspective view which cut a dust collection case partially so that the principal part in a dust collection container could be seen. FIG. 3 is a cross-sectional view seen from the side direction showing the movement of dust and air in the electric vacuum cleaner according to Embodiment 1 of the present invention. It is the principal part cross-sectional perspective view which showed the motion of the dust and air in a dust collecting container.

Embodiment 1 FIG.
(Configuration of vacuum cleaner)
1 is an external perspective view showing the electric vacuum cleaner according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the electric vacuum cleaner according to Embodiment 1 of the present invention as viewed from the side.
Hereinafter, the configuration of the electric vacuum cleaner according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2.
Note that in each drawing, the same reference numerals are given to the same portions or corresponding portions, and a part of the description may be omitted.

  As shown in FIG. 1, 100 is a vacuum cleaner according to Embodiment 1 of the present invention, and includes a main body 1 and a dust collecting container 8. The dust collecting container 8 has a handle 20 described later at a location covered with the cover 7.

When the cover 7 is rotated about the rotation shaft 2a shown in FIG. 2, the handle 20 is exposed. When the handle 20 is held and pulled out above the main body 1, it can be detached from the main body 1.

As shown in FIG. 1, the main body 1 includes an upper case 2 that forms an upper portion of the main body 1, a lower case 3 that forms a lower portion of the main body 1, and a front case 4 that forms the front portion of the main body 1. It is comprised by.

  The front case 4 is provided with a hose body connection port 9. The hose body connection port 9 can be connected to a hose body (not shown) composed of a suction tool for sucking dust together with air, a hard extension pipe having a telescopic structure, a flexible pipe having flexibility such as a bellows, and the like. It has become.

  Wheels 6a are attached to both sides of the lower case 3, and casters 6b are attached to the bottom. The vacuum cleaner 100 can be freely moved by drawing the hose body by the wheels 6a and casters 6b.

  A main body grip 5 is provided on the front side of the main body 1. The main body 1 can be carried by having the main body gripping portion 5.

  As shown in FIG. 2, the dust collection container 8 is accommodated in the main body 1. A suction port 11 and a hose body connection port 9, which will be described later, provided in a dust collection case 10 constituting the dust collection container 8 communicate with each other in a state where the dust collection container 8 is accommodated.

  The dust collecting container 8 includes a dust separation unit 12. The dust separation unit 12 separates dust sucked together with air into air excluding dust and dust. The dust collecting container 8 has a dust collecting portion 13. The dust collection unit 13 accumulates dust.

  A dust collection case 10 constituting the dust collection container 8 is provided with a rotatable lid 17. A first filter 16 is attached to the lid body 17. Further, the lid 17 is provided with a filter cover 14, and a communication port filter 15 is attached to the filter cover 14. The configuration of the dust collecting container 8 will be described in more detail later.

  An electric blower 18 is included behind the main body 1. The electric blower 18 generates suction air that sucks air containing dust.

  A control board 19 is included in the lower rear portion of the main body 1. The control board 19 controls the operation of the electric blower 18 by operating a switch provided in an operation unit (not shown). In addition, although not shown, a cord reel for winding and holding the power cord is also included in the main body 1.

(Configuration of dust collection container)
3 is an external perspective view showing the dust collecting container of the electric vacuum cleaner according to Embodiment 1 of the present invention, FIG. 4 is a perspective view showing the open state of the lid of the dust collecting container, and FIG. 5 is the inside of the dust collecting container. FIG. 6 is an external perspective view of the dust separating part contained in the dust collecting container, and FIG. 7 is an external view of the dust separating part contained in the dust collecting container. It is a side view.
Hereinafter, the configuration of the dust collecting container of the electric vacuum cleaner according to Embodiment 1 of the present invention will be described in detail with reference to FIGS.
Note that in each drawing, the same reference numerals are given to the same portions or corresponding portions, and a part of the description may be omitted.

  As shown in FIGS. 3 and 4, the dust collection container 8 includes a dust collection case 10 formed by resin molding, a dust separation unit 12, and a lid body 17.

  Since the dust collection case 10 has the dust collection part 13 which accumulate | stores dust inside, it is formed with resin with high transparency so that the inside can be visually recognized. The dust collection case 10 is provided with a suction port 11 that communicates with the aforementioned hose body connection port 9. The surface of the dust collection case 10 facing the suction port 11 is open.

The opening of the dust collection case 10 is closed with a lid 17 that is rotatably attached to the dust collection case 10. A pleated first filter 16 is attached to the lid body 17. The lid 17 is provided with a rotatable filter cover 14. The filter cover 14 is attached between the dust separator 12 and the first filter 16 so as to cover the first filter 16.

  The filter cover 14 has a communication port 29 for ventilating air from an exhaust port 26 of a cylindrical portion 24 described later. A communication port filter 15 is attached to the communication port 29. The communication port filter 15 is coarser than the first filter 16.

  The dust collecting case 10 is provided with an arched handle 20. A lock lever 21 is attached to the center of the handle 20. The lock lever 21 is rotatably supported by a lock lever rotation shaft 21a in a hole (not shown).

  The lock lever 21 is urged in a direction to close the lid 17 by elastic means (not shown). When the lock lever 21 is operated against the urging force, the holding of the lid body 17 is released and the lid body 17 is opened. Since the dust collecting case 13 has the dust collecting part 13 for collecting dust, the cover 17 can be opened and the collected dust can be discarded.

  As shown in FIG. 5, the dust separation unit 12 shown in FIGS. 6 and 7 is accommodated in the dust collection case 10. The dust separator 12 can be detached from the dust collection case 10. As shown in FIG. 4, the locking piece 30 can be attached to the holding claw 31 and the locking hole 32 shown in FIG. 6 can be engaged with a locking claw (not shown) provided in the dust collecting case 10.

  As shown in FIG. 6, the dust separation unit 12 includes an introduction port communication unit 22, a turning unit 23, and a cylindrical unit 24. The inlet communication part 22, the turning part 23, and the cylindrical part 24 are each formed by resin molding. In the embodiment of the present invention, the inlet communication part 22 and the swivel part 23 are integrally formed, and the cylindrical part 24 is a combination of parts formed separately.

However, the present invention is not limited to this. Even if the introduction port communication portion 22 and the turning portion 23 and the cylindrical portion 24 are formed separately, the introduction port communication portion 22, the turning portion 23 and the cylindrical portion 24 are integrally formed. May be.

  One end of the inlet communication portion 22 is connected to the suction port 11 of the dust collecting case 10, communicates with the hose body connection port 9 (see FIG. 2), and the other end communicates with the turning portion 23.

  The turning part 23 is provided with a cylindrical part 24 having a taper therein. The cylindrical portion 24 has an intake port 25 and an exhaust port 26. Since the cylindrical portion 24 is tapered as described above, the intake port 25 side is thin and the exhaust port 26 side is thick. Therefore, the area of the exhaust port 26 is larger than that of the intake port 25.

  A first opening 27 and a second opening 28 are provided in the turning portion outer wall 23a. As shown in FIG. 7, the first opening 27 is provided near the exhaust port 26 of the cylindrical portion 24, and the second opening 28 is provided near the intake port 25 of the cylindrical portion 24.

  The first opening 27 has a larger area than the second opening 28. The first opening 27 is located upstream of the second opening 28 when viewed from the ventilation path through which air flows. The first opening 27 and the second opening 28 communicate with the dust collection unit 13. The dust collection unit 13 is provided outside the ventilation path.

Dust separated from the air by the dust separator 12 is discharged from the first opening 27 and the second opening 28 to the dust collector 13. Since the dust collection unit 13 is out of the ventilation path, the dust discharged to the dust collection unit 13 does not return to the ventilation path. The ventilation path and dust separation will be described in detail in later operations.

  Next, referring to FIGS. 8A and 8B, the rotation axis center of the electric blower 18, the axial center of the cylindrical portion serving as the turning center axis, and the relationship between the rotation direction of the electric blower 18 and the turning direction of the turning portion 23. Will be explained. FIG. 8A is a schematic diagram for convenience showing the rotation axis of the electric blower and the axial direction of the cylindrical portion, and FIG. 8B is a schematic view for convenience showing the rotation direction of the electric blower and the swivel portion. .

  As shown in FIGS. 8A and 8B, the rotational axis center of the electric blower 18 and the axial center of the cylindrical portion 24 serving as the central axis of turning are parallel to each other. The rotational axis center of the electric blower 18 and the axial center of the cylindrical portion 24 serving as the pivot center axis are arranged at positions shifted in the left-right direction and the up-down direction so as not to be coaxial.

If the rotational axis center of the electric blower 18 and the axial center of the cylindrical portion 24 serving as the pivot center axis are made coaxial, the linear suction force of the electric blower 18 becomes too strong, and the rotational force is used as the rotational force of the pivot part 24. The turning force cannot be increased.

  As shown in FIG. 8 (b), the rotational force of the electric blower 18 is made to be the turning force of the turning portion 24 by arranging the axial center of the cylindrical portion 24 that becomes the turning central axis near the outer periphery of the rectifying blade 18 a of the electric blower 18. Can be added to. In addition, the rectifier blade here is for stabilizing the flow of the wind of the electric blower, and is fixed without rotating.

As the turning force becomes stronger, the air containing dust is more strongly rotated. Accordingly, the centrifugal force acting on the dust contained in the air is also increased, so that the dust separation performance can be enhanced.

(Operation)
Next, the operation of the electric vacuum cleaner according to Embodiment 1 of the present invention will be described in detail with reference to FIGS. FIG. 11 is a cross-sectional view showing the movement of dust and air in the electric vacuum cleaner according to Embodiment 1 of the present invention as viewed from the side, and FIG. 12 is a main part showing the movement of dust and air in the dust collecting container. It is a cross-sectional perspective view.

  As shown in FIGS. 11 and 12, dust-containing air is sucked like A and passes through the suction port 11, and passes through the inlet communication part 22 constituting the dust separation part 12 like B, It flows to the turning part 23 which comprises the dust separation part 12 like C. Since the path communicating from the inlet communication part 22 to the turning part 23 is gradually narrowed, the flow rate of air is increased.

  In the swivel unit 23, the inner surface of the swivel unit and the outside of the cylindrical unit 24 form a path for swirling air, and air containing dust is sucked into the swirl unit as D and turns into a swirl flow. The swirling flow flows outside the cylindrical portion 24 while swirling like the D toward the intake port 25 side with the exhaust port 26 side as the upstream.

The internal space of the cylindrical portion 24 is a ventilation path that flows from the intake port 25 to the exhaust port 26. Since there are no small holes or openings in the outer circumferential direction of the cylindrical portion 24, the air swirling the revolving portion 23 is not directly sucked into the internal space of the cylindrical portion 24. Therefore, the movement of the turning air is not disturbed, and the turning force is unlikely to decrease.

  Since the centrifugal force is applied to the air containing dust in the swivel unit, the swirl unit turns so that the dust is pressed against the outer wall 23a of the swivel unit. The turning portion outer wall 23 a is provided with a first opening 27 near the exhaust port 26 of the upstream cylindrical portion 24 and a second opening 28 near the intake port 25 of the downstream cylindrical portion 24.

  The dust turning so as to be pressed against the turning portion outer wall 23a by the centrifugal force is discharged from the first opening 27 to the communicating dust collecting portion 13 as X1 shown in FIG. As described above (paragraph 0033), the cylindrical portion 24 is tapered, the intake port 25 side is thin, and the exhaust port 26 side is thick.

Therefore, the space with the turning portion outer wall 23a is narrow on the exhaust port 26 side, so that the flow velocity is the fastest in the vicinity of the exhaust port 26, and the centrifugal force applied to the dust contained in the air is also maximized. 1 is discharged from one opening 27.

The first opening 27 at the position where the centrifugal force is maximized has a larger opening area than the second opening 28 in order to discharge dust that is large and heavy like X1.

  When there is dust that could not be discharged from the first opening, it is discharged from the second opening 28 provided near the air inlet 25 of the cylindrical portion 24 as shown by X2 in FIG.

  As described above, dust is separated from the dust-containing air by centrifugal force, and is discharged from the first opening 27 and the second opening 28 to the dust collecting unit 13. The air does not contain dust and is sent to the air inlet 25 of the cylindrical portion 24 as shown by E in FIG.

As shown in FIG. 7, the air inlet 25 of the cylindrical portion 24 is downstream of the starting point position of the second opening 28. Therefore, as described above, dust is separated before air is sent to the intake port 25 of the cylindrical portion 24 and is discharged from the first opening 27 and the second opening 28. Therefore, air that does not contain dust is removed from the cylindrical portion 24. It can be sent to the intake port 25.

  In the embodiment of the present invention, an example in which two openings are provided in the turning portion outer wall 23a has been described. However, a plurality of openings provided in the turning portion outer wall 23a are not limited to one. Therefore, it is not limited to two, for example, even if three are provided, it contributes to the discharge of dust.

  The discharged dust is accumulated in the dust collecting unit 13, but as shown in FIG. 9, it rotates like the air flow H at the moment when the dust X5 is discharged. If it rotates as it is, it may be sucked into the gap 37 slightly between the dust collecting case 10 and the swivel part 23 and may return to the ventilation path again.

Therefore, the rib a33 for preventing the return of dust on the dust collecting case 10 side and the rib b34 for preventing the return of dust on the revolving part 23 side are provided to prevent the dust X5 from returning to the ventilation path again. Yes. In addition, the rib here is a plate-like protruding shape having a thickness of several millimeters.

In the embodiment of the present invention, the dust collection case 10 and the swivel unit 23 are provided with ribs a33 and ribs b34 for preventing return, respectively. Returning to the ventilation path can be prevented.

  In order to compress the dust accumulated in the dust collection unit 13, the dust collection unit 13 is sucked by the electric blower 18. As shown in FIG. 10, the filter cover 14 is provided with a dust compression opening 35 that allows ventilation. In order to increase the force for compressing the dust, the rotational axis center of the electric blower 18 is disposed within the range of the dust compression opening 35 so that the linear suction force of the electric blower 18 can be obtained.

A second filter 36 is provided in the dust compression opening 35 so that even if the electric blower 18 generates the suction air G, the dust X4 sticks to the fine first filter 16 to prevent clogging. The filter 16 is protected. The second filter is coarser than the first filter 16 so as not to be clogged.

  The air sent to the intake port 25 of the cylindrical part 24 passes through the inside of the cylindrical part 24 as shown by F in FIG. 11 and reaches the exhaust port 26 of the cylindrical part 24. Furthermore, it passes through the communication port filter 15 of the communication port 29 of the filter cover 14 provided on the downstream side of the exhaust port 26, passes through the first filter 16, and reaches the electric blower 18.

  The communication port filter 15 is a filter for prevention that corresponds to an emergency. The first filter 16 collects fine dust, and has a pleated shape and fine eyes. Therefore, if dust adheres, the first filter 16 is likely to be clogged, and maintenance of the first filter 16 is required. Since the first filter 16 is pleated, maintenance is not easy.

Therefore, even if dust that has not been discharged from the first opening 27 and the second opening 28 to the dust collecting portion 13 passes through the intake port 25 of the cylindrical portion 24, before it reaches the first filter 16. The communication port filter 15 is arranged upstream so that it can be collected by the communication port filter 15.

  Since the communication port filter 15 is provided on the flat filter cover 14 as shown in FIG. 4, dust is easily removed.

  After passing through the communication port filter 15 and the first filter 16, the air sucked and discharged by the electric blower 18 is discharged out of the main body 1 from a main body exhaust port (not shown).

  As described above, the rotation axis direction of the electric blower and the axial direction of the cylindrical part are arranged in parallel, and the swivel part swirls air around the outer periphery of the cylindrical part. Since the rotation direction of the electric blower is the same as the rotation direction, the centrifugal force generated by the rotation of the electric blower is added to the centrifugal force of the air swirling in the same rotation direction. Therefore, the separation performance of dust from the air containing dust can be improved.

Further, since there is no small hole or opening in the circumferential direction of the cylindrical portion, the air swirling the swivel portion is not directly sucked into the ventilation path of the inner space of the cylindrical portion, and the movement of the swirling air is Since it is not disturbed, the turning force is difficult to decrease.

In addition, a plurality of openings, a first opening and a second opening, are provided in the swivel part so that dust is accumulated in the dust collecting part that is out of the ventilation path, so that the sucked air passes through the accumulated dust. There is nothing to do. Therefore, it is possible to suppress a decrease in suction force due to an increase in the amount of accumulated dust.

Since the dust collection case and / or the swivel portion are provided with ribs for preventing the return of dust, dust discharged from the ventilation path does not return to the ventilation path again, and the dust collection section is stable. Can collect dust.

  Then, since the rotating shaft of the electric blower is disposed within the range of the dust compression opening, the linear suction force of the electric blower can be obtained and the force for compressing the dust accumulated in the dust collecting portion can be increased. .

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Upper case, 2a Rotating shaft, 3 Lower case, 4 Front case, 5 Main body holding part, 6a Wheel, 6b Caster, 7 Cover, 8 Dust collection container, 9 Hose body connection port, 10 Dust collection case, DESCRIPTION OF SYMBOLS 11 Suction port, 12 Dust separation part, 13 Dust collection part, 14 Filter cover, 15 Communication port filter, 16 1st filter, 17 Cover body, 18 Electric blower, 18a Rectifier blade, 19 Control board, 20 Handle, 21 Lock Lever, 21a Lock lever rotation shaft, 22 Inlet port communicating portion, 23 Rotating portion, 23a Rotating portion outer wall, 24 Cylindrical portion, 25 Inlet port, 26 Exhaust port, 27 First opening, 28 Second opening, 29 Communicating Mouth, 30 Locking piece, 31 Holding claw, 32 Locking hole, 33 Rib a, 34 Rib b, 35 Dust compression opening, 36 Second filter, 37 Clearance, 1 0 vacuum cleaner, A air flow, B air flow, C air flow, D air flow, E air flow, F air flow, G suction air, H air flow, X1 dust, X2 dust, X3 dust, X4 dust, X5 dust.

Claims (8)

An electric blower disposed in the body,
A dust collecting container for collecting and collecting dust contained in the air sucked by the electric blower,
The dust collection container has a dust collection portion for collecting dust and a suction port, and a dust collection case having a surface facing the suction port,
A dust separator that separates dust-containing air into dust and air excluding dust;
It is composed of a lid that closes an opening of the dust collection case that is rotatably provided in the dust collection case,
The dust separation part is an inlet communication part communicating with the suction port;
A swirl unit that communicates with the inlet communication unit, swirls the air containing the dust, and centrifuges the air into the air excluding the dust and the dust;
It is arranged in the swivel part and is composed of a cylindrical part having an air inlet and an air outlet through which air excluding the dust passes,
Arranged so that the rotational axis direction of the electric blower and the axial direction of the cylindrical portion are parallel,
The swivel portion is configured to swirl air around the outer periphery of the cylindrical portion, and the direction of swirling the air of the swivel portion and the rotation direction of the electric blower are the same rotation direction. Vacuum cleaner.   The vacuum cleaner according to claim 1, wherein there is no small hole or opening in the circumferential direction of the cylindrical portion.   2. The vacuum cleaner according to claim 1, wherein the electric blower is disposed so that a rotation axis direction of the electric blower and an axial direction of the cylindrical portion are not coaxial. An electric blower disposed in the body,
A dust collecting container for collecting and collecting dust contained in the air sucked by the electric blower,
The dust collection container has a dust collection portion for collecting dust and a suction port, and a dust collection case having a surface facing the suction port,
A dust separator that separates dust-containing air into dust and air excluding dust;
It is composed of a lid that closes an opening of the dust collection case that is rotatably provided in the dust collection case,
The dust separation part is an inlet communication part communicating with the suction port;
A swirl unit that communicates with the inlet communication unit, swirls the air containing the dust, and centrifuges the air into the air excluding the dust and the dust;
It is arranged in the swivel part, and has an intake port and an exhaust port through which air excluding the dust passes, and is constituted by a cylindrical part having no small hole or opening in the circumferential direction,
Arranged so that the rotational axis direction of the electric blower and the axial direction of the cylindrical portion are parallel and not coaxial,
The swivel portion is configured to swirl air around the outer periphery of the cylindrical portion, and the direction of swirling the air of the swivel portion and the rotation direction of the electric blower are the same rotation direction. Vacuum cleaner.   The swivel portion is provided with a first opening, and a second opening having a smaller opening area than the first opening is provided downstream of the first opening and closer to the suction port of the dust collection case. The electric vacuum cleaner according to any one of claims 1 and 4, wherein   6. The electricity according to claim 1, wherein the dust collecting case and / or the swivel portion are provided with ribs for preventing the return of dust. Vacuum cleaner. The lid is provided with a first filter,
A filter cover is provided so as to cover the first filter,
The filter cover has a dust compression opening through which air sucked to compress the dust accumulated in the dust collection portion can pass.
5. The electric vacuum cleaner according to claim 1, wherein the dust compression opening includes a second filter having a coarser mesh than the first filter.   The electric vacuum cleaner according to claim 7, wherein a rotating shaft of the electric blower is disposed within a range of the dust compression opening.

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