JP3488877B1 - Electric vacuum cleaner - Google Patents

Abstract

An object of the present invention is to provide a vacuum cleaner capable of improving cleaning performance and maintainability of a filter element of a second dust separating unit. SOLUTION: An electric blower 33 is provided through a suction port of a cleaner body.
A first dust separating section 61 for separating air and coarse dust flowing in the air path into a wind path reaching the air inlet 33A, a first dust collecting section 55 for storing the dust separated by the separating section 61; And a second dust separation unit (filter) 80 disposed downstream of the first dust separation unit. The filter 80 includes a mat-shaped filter element 82 used upright. A concave second dust reservoir 72 for storing fine dust falling from the upstream surface of the filter element 82 is provided below the filter element 82. Thereby, the second dust collecting portion
It is characterized in that the dust accumulated in 72 is sowed up every time it is operated and is not attached to the filter element 82.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a second dust separating section for separating the dust passing through the first dust separating section downstream of the first dust separating section for separating the dust in the sucked dust-containing air. The present invention relates to an electric vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, in an electric vacuum cleaner, a second dust separating portion is provided downstream of the first dust separating portion in order to prevent the electric blower from sucking dust (see, for example, Patent Document 1). ).

In the electric vacuum cleaner of Patent Document 1, the inside of the cylindrical dust collector body is divided into a lower dust collecting chamber and an upper dust collecting chamber by a horizontal partition plate, and both chambers are partitioned. An exhaust fan (electric blower) is attached to the upper end opening of the upper dust collection chamber so as to communicate with each other through an exhaust pipe in the central part of the above. A tangential suction port is provided above the lower dust collecting chamber, and the suction port and the lower dust collecting chamber form a cyclone-type first dust separating section. A filter covering the intake side of the exhaust fan is provided in the upper dust collecting chamber, and the filter and the upper dust collecting chamber form a second dust separating portion.

In this electric vacuum cleaner, the dust in the dust-containing air sucked from the suction port by the operation of the exhaust fan is centrifugally separated in the first dust separating section and stored in the lower dust collecting chamber, and the first dust is also collected. The air in the separation unit flows from the exhaust stack into the upper dust collection chamber of the second dust separation unit, passes through the filter, is sucked into the exhaust fan, and is then discharged to the outside. In this case, the filter filters dust contained in the air.

[0005]

[Patent Document 1] Japanese Patent Application No. 60-157686
2-66755) microfilm (page 3-5,
(Fig. 1)

[0006]

When the operation of the exhaust fan is stopped in Patent Document 1, the dust trapped on the upstream side surface of the filter of the second dust separating portion falls into the upper dust collecting chamber. However, the upper dust collecting chamber forms a part of the air passage extending from the lower dust collecting chamber to the suction port of the exhaust fan. For this reason, as the exhaust fan is operated again, the air passing through the upper dust collecting chamber causes dust accumulated in the upper dust collecting chamber to be easily lifted up and captured again by the filter.

Thus, every time the operation is restarted, the dust accumulated in the upper dust collecting chamber is recaptured by the filter, so that the filter is likely to be clogged early. As a result, the maintenance interval required by the user, such as washing the filter with water to regenerate it or replacing it with a new filter, is short, and its improvement is required. Further, the filter is clogged early, the air passage resistance increases, the force of sucking the dust-containing air into the suction port of the lower dust collecting chamber decreases, and the cleaning performance easily deteriorates. In particular, in the cyclone type electric vacuum cleaner as described in Patent Document 1, it is unavoidable that the centrifugal separation action is reduced as the suction force is reduced.

The problem to be solved by the present invention is to obtain an electric vacuum cleaner which can improve the cleaning performance and the maintainability of the filter element of the second dust separating portion.

[0009]

In order to solve the above-mentioned problems, the present invention provides a cleaner body having a suction port,
Body case with a built-in electric blower having
Equipped with a dust container that is detachably attached to the main body case,
The dust container has an opening on the rear surface and a standing wall inside.
And a container case body having a
From the suction port of the main body of the vacuum cleaner.
The negative pressure space where the air that reaches the air outlet flows and the negative pressure space
The electric blower is removed from the suction port of the cleaner body.
A first dust separating portion for separating air and dust reaching the intake port of
It is provided in the container case body and is separated by the first dust separating unit.
Used to stand up first dust collecting part that collects separated dust
A mat-shaped filter element,
It is attached to the opening of the container case body located on the downstream side.
And close to the standing wall that forms the first dust collecting part
The second dust separating part facing each other and below the filter element
Is provided on the container case body located at the
And a space between the second dust separating portion and
Dust falling from the filter element is collected separately from the first dust collecting section.
A second dust collecting portion.

In the present invention, the mat-shaped filter element is a flat filter or expanded pleats, which is formed by laminating a filter material such as paper, cotton, cloth, glass wool, non-woven fabric, and foamed synthetic resin in a single layer or a plurality of layers. A filter or the like can be preferably used, and at least the upstream surface of the filter element can be provided with a surface-treated layer having a low coefficient of friction that suppresses adhesion of dust to the surface. In the present invention, the means for separating the dust in the first dust separating unit is, for example, even if it is a filtration separating means using a filter medium, the inertial force based on the difference in kinetic energy between air and dust without using the filter medium. It may be an inertial separation means for performing inertial separation (including centrifugation) by utilizing the difference between Further, in the present invention, the dust falling from above is passed through the second dust collecting portion, but a slanted or funnel-shaped baffle for further suppressing the influence of turbulent flow on the second dust collecting portion. Is not hindered. Further, in the present invention, the second
The provision of dust-removing means for the filter element of the dust-separating part does not hinder.

In the present invention, the operation is performed in the second dust collecting portion that collects the dust that falls from the mat-shaped filter when the operation is stopped.
As the air sucked into the intake port of the electric blower passes through or the turbulent flow of the air is less likely to spread to the second dust collecting part, the dust collected in the second dust collecting part is filtered. Reattachment to the element can be suppressed.

[0012]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

One end of a flexible dust suction hose 21 is detachably connected to a cleaner body 20 of an electric vacuum cleaner shown in FIG. 1 and the other end of the hose 21 has a hand-operated portion. 22 is provided. An extendable extension tube 23 is detachably connected to the hand operation section 22, and a suction port body 24 is detachably connected to a tip portion of the extension tube 23. The hand operation unit 22 has a handle 22A, and this handle 22A
Is provided with an operation switch 22B for remote operation.

As shown in FIGS. 1 to 3, the cleaner body 2
Reference numeral 0 denotes a main body case 30, a dust collecting container (dust cup) 50 detachably attached to the main body case 30, and a lid body 4.
It has 0 and. The rear portion of the lid 40 is the main body case 3
It is hinged to the front part of 0 and is openable and closable in the vertical direction.

The main body case 30 includes a rear electric section 34 and a front mounting section 35. As shown in FIG. 2, the electric blower 33 has a built-in electric blower 33, and the intake port 33 </ b> A of the electric blower 33 is mostly close to the upper side of the electric blower 34. The mounting portion 35 is integrally projected from the lower portion of the electric portion 34 to the front, and is formed in a dish shape having a concave shape that opens upward. The dust container 50 is removably mounted on the mounting portion 35. When the lid 40 is closed, the lid 40 and the mounting portion 35 sandwich and fix the dust container 50.

As shown in FIG. 3B, the front surface of the electric section 34 is opened, and the opening 34A faces the air inlet 33A of the electric blower 33 and communicates therewith. The opening 34A is provided with a filter retainer 34B radially having ribs for retaining the filter 80 described later from the downstream side thereof.

On both side walls in the width direction of the main body case 30, slanted bulging portions 36 (only one is shown) extending from the upper front portion to the lower rear portion of the main body case 30 are integrally formed. A rear wheel 37 is rotatably attached to the lower end. An exhaust portion 38 including a plurality of exhaust holes is provided at both bulges 36 and front portions of both side walls of the main body case 30. These exhaust portions 38 communicate with an exhaust port 33B (see FIG. 2) of the electric blower 33 via an exhaust air passage (not shown). The air exhausted from the exhaust port 33B of the electric blower 33 is exhausted to the outside from the exhaust unit 38 via the exhaust air passage. A battery 39 (not shown) is built in the electric portion 34 of the main body case 30 below the electric blower 33. The electric power of the battery 39 is supplied to the electric blower 33 and the like. It is also possible to arrange a cord reel in the same portion instead of the battery shown in the figure and supply the electric power of the commercial AC power source to the electric blower 33 or the like via this reel.

The lid 40 has a top plate 41 formed in a substantially elliptical shape in a plan view, and a peripheral wall 42 integrally formed around the top plate 41. A connection pipe 44 (see FIG. 2) having a suction port 43 for detachably connecting the dust suction hose 21 is provided at the front portion of the peripheral wall 42. The connection pipe 44 extends in the front-rear direction, and one end opening (front end) thereof forms the suction port 43 and the other end (rear end) 45 is open.

As shown in FIGS. 4 to 6, a dust collecting container 50.
Has an opening 51 on one surface, for example, the rear surface located on the right side in FIG. 4, and faces the opening 51, for example, the front wall 5
0a has a container case body 53 having an intake inlet 52, and a handle portion 54 provided on the container case body 53. The handle 54 is located below the intake inlet 52 and is integrally formed with the wall 50a, for example.

The container case body 53 has a first dust collecting portion (first dust collecting portion) 55 formed in the lower portion of the case body 53, and a negative pressure chamber formed mainly above the first dust collecting portion 55. Section (negative pressure space) 56, first dust separating section 61 provided in the negative pressure chamber section 56, and guide section 63 for guiding the dust separated by the dust separating section 61 to the first dust collecting section 55. And have.

The bottom surface of the first dust collecting portion 55 is open. A bottom plate 57 is attached to the bottom of the first dust collecting portion 55 so as to be openable and closable around the axis J. By opening the bottom plate 57, the dust accumulated in the first dust collecting portion 55 can be discarded. . The closed state of the bottom plate 57 is designed to be released via a mechanism (not shown) that is interlocked with the depression of the operation button provided on the handle 54.

The first dust collecting portion 55 and the negative pressure chamber portion 56 are defined by a standing wall 60 near the opening 51 and a ceiling wall 58 which is bent from the upper end of the wall 60 and is continuous with the wall 50a. A ventilation opening 59 that connects the first dust collecting portion 55 and the negative pressure chamber portion 56 is formed in a ceiling wall 58 of the first dust collecting portion 55. The ventilation opening 59 is provided so as to face the substantially central portion of the first dust collecting portion 55. This ventilation opening 59 is shown in FIG.
Further, as shown in FIG. 8, a filter F1 made of, for example, a net is attached.

A connection hole 58 is provided on the ceiling wall 58 on the side of the standing wall 60.
A (see FIG. 5) is formed. Below the connecting hole 58A, a guide wall 55G (see FIGS. 4 and 8) for generating a swirling flow in the first dust collecting portion 55 is provided.

The first dust separating portion 61 has a tubular air passage forming body 62 forming a branch air passage 62a, and a guide portion 63.

As shown in FIGS. 5 and 6, the air duct forming body 62.
Has a hollow truncated cone shape with one end and the other end open, and has a plurality of separation openings 64 at equal intervals over the entire circumference thereof, and a filter F2 that closes these separation openings 64 (see FIG. 2 and FIG. (See FIG. 4). Specifically, the air duct forming body 62 includes a pair of large and small circular frame portions W1 and W2.
And a plurality of ribs W3 that connect the frame portions W1 and W2 to each other. Each separation opening 64 is formed in a space surrounded by both frame portions W1 and W2 and a rib W3. The filter F2 is made of, for example, a net, and is attached in a tubular shape along the inner peripheral surface of the frame. Therefore, the air duct forming body 62 has a structure in which both axial ends of the air duct are opened, and a separating air duct 62a surrounded by the air gap forming body 62 is formed.

The separation air passage 62a extends linearly in the axial direction of the cleaner body 20 (the front-back direction in this embodiment). The separation air passage 62a is the separation opening 6 of the air passage forming body 62.
4, the negative pressure chamber portion 56 of the container case body 53, and the opening 34A of the electric portion 34 of the main body case 30 are communicated with the intake port 33A of the electric blower 33 sequentially.

As shown in FIG. 4, the diameter of the large-diameter one-end opening 62A of the air passage forming body 62 is the same as the intake inlet 52 of the container case body 53.
Is formed larger than the diameter of. The air duct forming body 62 is connected to the container case body 53 so that the intake inlet 52 is located inside the one end opening 62A. The diameter of the small-diameter other end opening 62B of the air passage forming body 62 is formed to be substantially the same as the diameter of the intake inlet 52. As a result, the diameter of the air duct forming body 62 linearly gradually decreases from one end to the other end. The diameter of the other end opening 62B of the air duct forming body 62 may be smaller than the diameter of the intake inlet 52.

The direction in which the axis of the air duct forming body 62 extends and the direction in which the axis of the connecting pipe 44 of the lid 40 extends are substantially straight, and the electric blower 3 is placed on these axis extending lines.
The three intake ports 33A are provided so as to face each other. The connection pipe 44 of the lid 40, the air intake inlet 52 of the container case body 53, the air passage forming body 62, the opening 51 of the container case body 55, and the air intake port 33A of the electric blower 33 are provided in the cleaner body 20. They are sequentially arranged along the axial direction (the front-rear direction in this embodiment).

As shown in FIGS. 4 to 6, the guide portion 63 is provided continuously to the other end opening 62B of the air passage forming body 62. Specifically, the guide portion 63 includes an inclined wall portion 63A extending obliquely downward from an upper portion of the other end opening 62B of the air passage forming body 62, and a curved wall extending from one end of the inclined wall portion 63A and extending downwardly. The channel forming body 62 has a wind-passing wall portion 63B facing the other end opening 62B, and side wall portions 63C formed on both sides of the inclined wall portion 63A and the wind-passing wall portion 63B. The guide portion 63 has an opening 63D joined to the other end opening 62B of the air duct forming body 62.

The lower portion of the guide portion 63 has a tubular shape and extends, for example, in the vertical direction, and covers the connection hole 58A and is connected to the ceiling wall portion 58 and the standing wall 60. By this connection, the guide portion 63 communicates the separation air passage 62a with the first dust collecting portion 55.

The standing wall 60 is provided slightly inside (front side) of the opening 51 of the container case body 53 to give the opening 51 a predetermined depth H (see FIG. 4). Utilizing this depth H, a filter 80, which will be described later, which forms a second dust separating portion is detachably mounted in the opening 51.

As shown in FIGS. 4 to 7, a support wall 71 that supports a filter 80, which will be described later, from below is integrally provided outside the lower end of the standing wall 60. The lower ends of the support wall 71 and the standing wall 60 are integrated. The second dust collecting portion 72 is formed between the outside and the outside. The second dust accumulating portion 72 is provided for accumulating finer dust than the dust accumulated in the first dust accumulating portion 55, separately from the first dust accumulating portion 55. Second dust collecting portion 72
The upper and lower ends of each are opened, and the second dust collecting portion 72 is divided into a plurality of regions by a plurality of supporting ribs 73. The support ribs 73 support the filter 80 from below.

The lower end opening of the second dust collecting portion 72 is the first
It is arranged at the lower end opening of the dust collecting portion 55 and is openably and closably closed by the bottom plate 57 that opens and closes the first dust collecting portion 55. Thus, by opening one bottom plate 57, the dust accumulated in the first and second dust accumulating portions 55 and 72 can be discarded at the same time, and the usability can be improved. Since the bottom plate 57 closes the lower end opening of the second dust collecting portion 72, the second dust collecting portion 72 is formed in a concave shape so that the air flow passes through and the influence of the turbulent flow hardly spreads to the dust collecting portion 72. Specifically, this embodiment has a dead end structure.

An annular seal material 74 is provided on the inner surface of the bottom plate 57.
(See FIG. 4) is fixed, and thereby the lower ends of both dust collecting portions 55 and 72 are airtight at the same time when the bottom plate 57 is closed. Therefore, it is advantageous in that a single sealing material 74 can be shared and airtightness can be achieved without requiring a sealing material for each of the dust collecting portions 55 and 72. The entire lower end of the standing wall 60 that partitions the second dust collecting portion 72 and the first dust collecting portion 55 adjacent thereto is in contact with the inner surface of the closed bottom plate 57.
Further, the sealing material 74 is replaced with the bottom plate 57, and both dust collecting portions 55,
It is also possible to provide it in a ring shape over the lower end surface of 72.

The depth of fitting of the filter 80 into the opening 51 of the container case body 53 depends on the restriction means provided on the container case body 53, for example, the stepped portion formed on the ceiling of the container case body 53 as shown in FIG. 53A and standing wall 60 and rib 73
The filter 80 is restricted by a corner portion 53B formed by and, and by this restriction, the filter 80 is mounted upright, preferably tilted forward at an angle close to vertical, for example. Here, the forward tilt refers to a state in which the upper end of the entire filter 80 or the filter element described later is tilted from the lower end so as to be pushed out toward the upstream side with respect to the airflow passing through the filter 80.

The upper portion of the filter 80 attached to the container case body 53 faces the negative pressure chamber portion 56, and the lower portion thereof faces the standing wall 60 in close proximity. As a result, a gap G is formed between the lower portion of the filter 80 and the standing wall 60, which is much narrower than the upper negative pressure chamber portion 56 and has a small air passage cross-sectional area. The lower end of the gap G is communicated with the second dust collecting portion 72, which is located below the gap G.

As described above, the configuration in which the filter 80 is tilted forward is such that the filter 80 is
The dust adhering to the upstream surface of the is excellent in that it is prevented from being obstructed by the adhering dust at a position lower than that and can easily fall freely. In the present invention, the filter 80 may be provided vertically without tilting forward, and may be tilted slightly backward in some cases.

As shown in FIGS. 4 and 9, the filter 80
Includes a filter frame 81 and a filter element 82 which is mounted so as to cover the entire inner side of the frame 81. The filter element 82 is a mat-shaped filter material, and in particular, in this embodiment, a pleated filter element that is pleated to expand the filtration area is used. The mesh of the filter element 82 is finer than the mesh of the filters F1 and F2 in the preceding stage.

As shown in FIG. 9, the lower frame portion 81a of the filter frame 81, which supports the filter element 82 from the four sides, is provided with alternately closed portions 83 and cutout portions 84 that function as dust discharge portions. . Note that the upper frame and the side frame parts other than the lower frame part 81a are not provided with the closing part 83 and the notch part 84. The closing portion 83 and the cutout portion 84 are alternately formed at a predetermined pitch in correspondence with the pleats of the filter element 82, and the cutout portion 84 is formed so as to open to the front side (upstream side) of the filter frame 81. Has been done.

In FIG. 9, the lower ends of the grooves 82a extending in the vertical direction on the back surface of the filter element 82 directed to the front side are placed on the closing portion 83 and are closed by the closing portion 83. This prevents the lower frame portion 81a from having a ventilation path extending over the front and back surfaces of the filter element 82. Further, in FIG. 9, the lower ends of the grooves 82b extending in the up-down direction on the surface of the filter element 82 directed to the rear side are opposed to the cutout portion 84. Notch 84
Is communicated with the second dust collecting portion 72 therebelow. Therefore, the dust that has fallen from the surface of the filter element 82 passes through the cutout portion 84 and is collected in the second dust collecting portion 72 below.

Next, the operation of the electric vacuum cleaner 10 configured as described above will be described.

After the dust container 50 is placed on the placing portion 35 of the main body case 30 as shown in FIG. 3A, the lid plate 40 is closed as shown in FIG. Then, the dust suction hose 21 is connected to the suction port 43 of the lid 40. The dust suction hose 21 is already attached to the suction port body 2 through the extension pipe 23.
1 is connected.

In this state, when the operation switch 22B of the hand operation section 22A is operated to drive the electric blower 33, the negative pressure chamber section 56 of the container case body 53 becomes negative pressure through the opening 34A of the main body case 30. . This negative pressure is applied to the separation opening 64 of the air passage forming member 62 and the separation air passage 6 of the air passage forming member 62.
2a, the intake inlet 52 of the container case body 53, the connection pipe 44 of the lid 40, the dust suction hose 21, the extension pipe 23, and the suction port body 21 in order, so that dust is sucked from the suction port body 21 together with air. .

The sucked dust and air are sucked into the suction port 43 of the lid 40 through the extension tube 23 and the dust suction hose 21. The dust and air sucked into the suction port 43 passes through the suction inlet 52 of the dust collecting container 50 and is sucked into the air passage 62a of the air passage forming body 62 of the first dust separating portion 61.

A part of the air sucked into the air passage 62a is sucked into the negative pressure chamber portion 56 of the container case body 53 through the first filter F2 of the separation opening 64 of the air passage forming body 62, and further the container case. It is sucked into the intake port 33A of the electric blower 33 through the filter 80 attached to the opening 51 of the body 53.

In the above air suction, the cleaner body 2
The dust having a mass equal to or greater than a predetermined value, which is sucked into the separation air passage 62a extending linearly in the front-rear direction of 0, cannot rapidly change its direction due to its inertia and pass through the separation opening 64. Therefore, the dust having a large mass is separated from the air passing through the separation opening 64, goes straight through the separation air passage 62a, collides with the wind-contact wall portion 63B of the guide portion 63, and is guided by the guide portion 63.
Is introduced into the first dust collecting portion 55 along the.

At the same time, a part of the air is introduced into the first dust collecting portion 55 through the guide portion 63 like the dust having a large mass. The air thus introduced is guided by the guide wall 5
The 5G creates a downward swirling flow that rotates along the inner peripheral surface of the first dust collecting portion 55. Therefore, the first dust collecting portion 55
The dust introduced into the first dust collecting portion 55 due to the swirling flow.
Accumulate while being compressed along the lower inner surface of the. Then, the air that has been introduced into the first dust collecting portion 55 and has become a swirling flow rises and reverses at the central portion inside the first dust collecting portion 55, and the ventilation opening of the ceiling wall 58 of the first dust collecting portion 55. It is sucked into the negative pressure chamber portion 56 of the container case body 53 through 59.

On the other hand, the dust that is light in weight is collected in the first dust separating section 61.
Since the intake negative pressure of the electric blower 33 causes air to flow along the air passing through the filter F2 of the separation opening 64 without going straight through the separation air passage 62a in the air passage forming body 62, the air flows to the inner peripheral surface of the filter F2. Attached. When the clogging of the filter F2 becomes large due to the adhesion of such light dust, the air volume passing through the filter F2 decreases. However, the negative pressure in the negative pressure chamber portion 56 increases by the amount of this decrease, and the negative pressure in the first dust collecting portion 55 also increases through the ventilation opening 59 in the ceiling wall 58. For this reason, the wind speed and air volume of the air that travels straight through the separation air passage 62a increases.

When the velocity of the air flowing straight through the separation air passage 62a increases in this way, the air moving straight ahead easily separates the dust adhering to the filter F2. At this time, the diameter of the tubular air passage forming body 62 is from the opening 62A on the upstream side to the opening 62B on the downstream side.
By gradually decreasing as it goes to, the wind that goes straight through the separation air passage 62a flows evenly hitting the entire surface of the filter F2 while being drawn to the central portion of the separation air passage 62a. Therefore, it is possible to more easily remove the dust attached to the inner surface of the filter F2. The dust thus peeled off is introduced into the first dust collecting portion 55 through the guide portion 63 like the dust having a large mass, and is centrifugally separated from the air in the dust collecting portion 55 and accumulated.

As described above, even if the air volume passing through the filter F2 is reduced due to clogging, the air volume that goes straight through the separation air passage 62a increases, so that the air volume sucked by the electric blower 33 is kept substantially constant. Therefore, it is possible to always suck the dust with a predetermined suction force regardless of the clogging of the filter F2.

Further, in the first dust separating portion 61, dust-containing air is swirled and dust and a large mass such as coarse dust are removed without centrifugal separation of dust and air while reversing the traveling direction of the swirling flow. Utilizing the inertial force to go straight,
Since this dust is separated from the air, the air passage loss in the first dust separating section 61 is small. Moreover, since the intake inlet 52, the separation air passage 62a, the opening 51 of the container case body 53, and the intake opening 33A of the electric blower 33 are located at substantially the same height position and are sequentially arranged in the front-rear direction, When air is sucked from the separation air passage 62a through the filter F2 into the negative pressure chamber portion 56 of the container case body 53, the main flow of the air is large as shown by the arrow Q in FIG. It does not change, flows substantially linearly at the same height position, and is sucked by the electric blower 33.

As a result , the air passage loss is further reduced, and the function of the electric blower 33 can be fully exerted. Further, since the connection pipe 44 of the lid 40 and the tubular air passage forming body 62 are aligned in a straight line, the direction of the air introduced toward the intake inlet 52 of the container case body 53 and the air passage formation. Since the direction in which the body 62 extends is substantially straight, the air passage loss can be further reduced.

As described above, the air in the negative pressure chamber portion 56 passes through the filter 80 and is sucked into the electric blower 33.
The fine dust passing through the filters F1 and F2 can be captured by the filter 80, and the electric blower 33 can suck the cleaned air.

In this case, since the filter 80 that is being used upright mainly captures dust on the upstream surface, most of the dust that has adhered to the upstream surface when the operation of the electric blower 33 is stopped. Falls under its own weight. The dust thus dropped passes through the notch portion 84 of the lower frame portion 81a without being obstructed by the lower frame portion 81a of the filter frame 81, and the second dust sump provided below the filter 80 to face it. It is stored in the part 72.

The second dust collecting portion 72 formed at the lower end of the dust collecting container 50 flows in the negative pressure chamber 56 toward the intake port 33A of the electric blower 33 (shown by an arrow Q in FIG. 2). It is provided at a position separated by a large distance to the lower side and has a concave shape. As a result, the negative pressure chamber portion 56 through which the main flow Q flows and the second dust collecting portion 72 also communicate with each other through the gap G formed between the standing wall 60 and the lower portion of the filter element 82. Regardless, when the operation of the electric blower 33 is restarted, for example, when the electric vacuum cleaner 10 is used next time, the wind does not blow through the second dust collecting section 72, and the main flow Q is in the negative pressure chamber section 56. The influence of the turbulent flow created in the upper part of the can be made difficult to spread to the second dust collecting section 72. Moreover, since the gap G is made narrow enough to allow the dust falling from the surface of the filter element 82 to pass therethrough, the turbulent flow generation in the gap G is more effectively suppressed.

Therefore, the fine dust accumulated in the second dust reservoir 72 rises, and this dust is collected by the filter element 8.
2 can be effectively suppressed from reattaching to the upstream surface,
Accordingly, it is possible to prevent the filter element 82 from being clogged early. Moreover, the dust falling from the upstream surface of the filter element 82 is protected by the lower frame portion 81 of the filter frame 81.
Since the a is not blocked and the falling dust can be discharged to the second dust collecting section 72 below, when the upper part of the filter element 82 is clogged, the substantial filtering portion is filtered. It can be secured at the bottom of 82.

As a result, the maintenance interval required by the user, such as washing the filter element 82 with water for regeneration or replacing it with a new filter 80, in other words, the continuous usable period of the filter 80 can be lengthened.

Further, as described above, the redeposition of the dust accumulated in the second dust accumulating portion 72 is suppressed, and the early increase of the air passage resistance in the filter element 82 is suppressed. Therefore, the performance of actually sucking the dust-containing air into the suction port 43 by the suction force of the electric blower 33 does not easily deteriorate, and the cleaning performance can be improved.

As described above, the first dust separating section 61 is provided on the upstream side of the filter 80 forming the second dust separating section, and the first dust separating section 61 separates coarse dust in advance. Therefore, a large amount of dust does not adhere to the filter 80 and hinder its function.

Moreover, in the first dust separating section 61, since dust is separated from the air flow by inertial separation as described above, the main flow Q has a large energy and clear flow route, in other words, the filter element 82 . The passing position is roughly determined, and accordingly, the generation of turbulence can be reduced in the negative pressure chamber portion 56. Therefore, it is excellent in that the influence of the turbulent flow on the second dust collecting portion 72 can be further suppressed.

The present invention is not limited to the above embodiment. For example, if a pleated filter element 82 is used, its lower upstream surface may contact the standing wall 60. It is also possible to make the filter 80 half the size of the upper side in FIG. 4, and in this case, a vertically elongated second dust receiving portion whose lower end opening is opened / closed is preferably formed below the filter 80 by the bottom plate 57. It should be carried out.
Furthermore, when increasing the forward tilt angle of the filter 80,
The cutout portion 84 of the lower frame portion 81a of the filter frame 81 can be omitted. In addition, the filter F of the one embodiment
In addition to omitting 1 and F2, it is possible to omit the guide wall 55G that creates a swirling flow in the first dust collecting portion 55.

[0062]

As described above, according to the present invention, the dust accumulated in the second dust collecting portion different from the first dust collecting portion is prevented from reattaching to the filter element, and the second dust collecting portion is prevented. It is possible to provide an electric vacuum cleaner that can improve the maintainability of the filter element of the dust separating unit, reduce the air passage loss due to the suppression of the reattachment, and improve the cleaning performance.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a side view showing a cleaner body of the electric vacuum cleaner of FIG.

FIG. 3A is a side view showing the cleaner body of FIG. 2 with a lid opened. FIG. 3B is a perspective view showing the cleaner body of FIG. 2 in a state where the lid is opened and the dust container is removed.

FIG. 4 is a vertical cross-sectional view showing a state in which a filter is attached to a dust container included in the electric vacuum cleaner of FIG.

5 is a perspective view showing the dust container of FIG. 4 as viewed from the rear side.

6 is a cross-sectional plan view showing the dust container of FIG. 4.

7 is a perspective view showing the lower part of the dust container of FIG. 4 as viewed from the rear side.

8 is a bottom view showing the dust container of FIG. 4. FIG.

9 is an exploded perspective view showing a part of the filter attached to the dust container of FIG. 4. FIG.

[Explanation of symbols]

10 ... Vacuum cleaner 20 ... Vacuum cleaner body 30 ... Body case 33 ... Electric blower 33A ... Intake port 43 ... Suction port 50 ... Dust collecting container (dust cup) 53 ... Container case body 55 ... First dust collecting part 56 ... Negative Pressure chamber part (negative pressure space) 57 ... Bottom plate 60 ... Standing wall G ... Void 61 ... First dust separating part 62 ... Air passage forming body 62a ... Separation air passage 62A ... One end opening 62B of air passage forming body ... Air passage forming The other end opening 63 of the body ... Guide portion 63A ... Inclined wall portion 63B ... Wind blow wall portion 64 ... Separation opening 72 ... Second dust collecting portion 80 ... Filter (second dust separating portion) 81 ... Filter frame 81a ... Notch portion 82 ... Filter element 83 ... Closing portion 84 ... Notch portion (dust discharging portion)

Continued Front Page (72) Hiroshi Yokoyama, 43 Horiyamashita, Hadano City, Kanagawa Prefecture, Toshiba Tech Co., Ltd., Hadano Plant (72) Inventor, Hitoshi Suzuki, 43, Horiyamashita, Hadano City, Kanagawa Prefecture, Toshiba Tech Co., Ltd., Hadano Plant (72) Inventor Ai Tanaka 43 Horiyamashita, Hadano-shi, Kanagawa Toshiba Tech Co., Ltd. Hadano Plant (72) Inventor Yasushi Nakatogawa 43, Horiyamashita, Hadano-shi, Kanagawa Toshiba Tech Co., Ltd. Hadano Plant (56) Reference References JP-A-6-209882 (JP, A) JP-A-54-71864 (JP, A) JP-A-64-76817 (JP, A) JP-A-55-38132 (JP, A) Jitsuko Sho-47- 9805 (JP, Y1) Actual public 43-10789 (JP, Y1) Actual public 43-22627 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/10 A47L 9 / 12 A47L 9/16

Claims (8)

(57) [Claims] 1. A vacuum cleaner body having a suction port has a suction port.
Main body case with built-in electric blower, and this book
A dust collecting container detachably attached to the body case, wherein the dust collecting container has an opening at the rear surface and has a standing wall inside.
Body and the inside of this container case , and the suction of the cleaner body
Negative flow of air from the outlet to the intake of the electric blower
The pressure space and the suction port of the vacuum cleaner body provided in the negative pressure space.
Separates air and dust reaching the air intake of the electric blower
The first dust separating unit is provided inside the container case body, and is separated by the first dust separating unit.
The first dust collecting section for collecting separated dust and the mat-shaped filter element used upright are provided.
The container case body located on the downstream side of the first dust separating unit
It is attached to the opening and forms the first dust collecting portion.
A second dust separating portion that is close to and opposed to the upright wall, and is located below the filter element, and is attached to the container case body.
And a space between the upright wall and the second dust separating portion.
It is in communication with the dust that falls from the filter element.
An electric vacuum cleaner comprising: a second dust collecting portion that collects separately from the first dust collecting portion . 2. A vacuum cleaner body having a suction port has a suction port.
Main body case with built-in electric blower, and this book
A dust collecting container detachably attached to the body case, wherein the dust collecting container has an opening at the rear surface and has a standing wall inside.
Body and the inside of this container case , and the suction of the cleaner body
Negative flow of air from the outlet to the intake of the electric blower
The pressure space and the suction port of the vacuum cleaner body provided in the negative pressure space.
Separates air and dust reaching the air intake of the electric blower
The first dust separating portion and the standing wall are formed inside the container case body, and
The first dust collecting section for collecting the dust separated by the first dust separating section
And equipped with a mat-shaped filter element used upright,
The container case body located on the downstream side of the first dust separating unit
It is attached to the opening and faces the standing wall in close proximity.
Between the second dust separating portion and the negative pressure space, between the upstanding wall and the filter element.
The formed void is connected to the lower end of the void and is provided in the container case body.
And collects dust falling from the filter element into the first dust collecting portion.
An electric vacuum cleaner having a second dust collecting portion which is separately stored . 3. A cleaner body having a suction port has an intake port.
Main body case with built-in electric blower, and this book
A dust collecting container detachably attached to the body case, wherein the dust collecting container has an opening at the rear surface and has a standing wall inside.
Body and the inside of this container case , and the suction of the cleaner body
Negative flow of air from the outlet to the intake of the electric blower
The pressure space and the suction port of the vacuum cleaner body provided in the negative pressure space.
Separates air and dust reaching the air intake of the electric blower
A first dust separating part and a lower part inside the container case body, the first dust separating part
The first dust collecting section for collecting the dust separated in the section, and the mat-like filter element used upright,
With the upper part of the filter element facing the negative pressure space,
The lower part is close to the standing wall that forms the first dust collecting part
And face each other and are located on the downstream side of the first dust separating section.
A second dust separating part mounted in the opening of the container case body , located below the negative pressure space and below the filter element
Above et provided in the container case body is in said raised wall and said
Communicating with the air gap between the filter elements, said filter
Dust that collects from the element separately from the first dust collecting part
Comprising a two dust reservoir, the air leading to the intake port from the first dust separating unit
Flow of air is sucked in mainly through the top of the filter element
The electric blower is installed so that
Air from the first dust separator to the upper part of the filter element
The gap is formed narrower than the negative pressure space through which the flow of
Vacuum cleaner that is. 4. A cleaner body having a suction port has an intake port.
Main body case with built-in electric blower, and this book
A dust collecting container detachably attached to the body case, wherein the dust collecting container has an opening at the rear surface and has a standing wall inside.
And a container body, which is partitioned within the container case body,
Air flows from the suction port to the intake port of the electric blower
Negative pressure space and the suction port of the vacuum cleaner body provided in the negative pressure space.
Separates air and dust reaching the air intake of the electric blower
A first dust separating part and a lower part inside the container case body, the first dust separating part
It is equipped with a first dust collecting part that collects the dust separated in the section and a pleated filter element that is used upright.
When the upper part of the filter element of is opposed to the negative pressure space,
The lower part of the body is in contact with the standing wall that forms the first dust collecting portion.
When touched, the container located on the downstream side of the first dust separating unit is touched.
A second dust separating part mounted in the opening of the container case and a position below the negative pressure space and below the filter element.
Placed on the container case body, the filter element
Second dust that collects dust falling from the first dust reservoir separately from the first dust reservoir
Vacuum cleaner equipped with a reservoir . 5. The first dust separating portion passes through the suction port.
Cylindrical shape that separates air and dust flowing toward the intake port
The air duct forming body, the air duct forming body, and the first dust collecting portion
And a guide portion provided in communication with each other, wherein the axis of the tubular air passage forming member is linear, and
The passage forming member is configured such that the air passing through the suction port is introduced.
End opening, other end opening where separated dust is drawn out, both of these
Provided between the openings and directed from the one end opening to the other end opening
Part of the flowing air is sucked into the intake port to
From the dust that goes straight by inertia from the end opening toward the other end opening
Claim 1 to Claim 4 having a separation opening for separating.
The electric vacuum cleaner according to any one of items 1 to 10 . 6. The upper end of the filter element is upstream of the lower end.
A contract in which the filter element is tilted forward so as to protrude.
The vacuum cleaner according to any one of claims 1 to 5 . 7. The first and second dust collecting portions are adjacent to each other.
The lower end of the standing wall forms the first and second dust reservoirs.
While partitioning, the upright wall includes the first and second walls.
Partitioning the dust collecting part of the
Therefore, it is gradually forward from the upstream surface of the filter element.
Any one of claims 1 to 6 which is in the shape of a slant that separates to the side.
The electric vacuum cleaner according to item 1. 8. The lower ends of the first dust collecting portion and the second dust collecting portion are
The first and second dust reservoirs are said to be open.
The bottom plate that opens and closes the lower end opening of the part is attached to the container case body
Claims 1 to 7 which are marked
Vacuum cleaner.