JP2017131438A - Dust collector and vacuum cleaner equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner capable of reducing filter clogging while suppressing a weight increase.SOLUTION: A vacuum cleaner has: a first cylindrical centrifugal separation part 22a separating first dust; and a plurality of second cylindrical centrifugal separation parts 22b which are arranged around the first cylindrical centrifugal separation part and separate second dust smaller than the first dust in the air that has passed the first cylindrical centrifugal separation part. A dust cup 21 has: a first dust chamber 21b1 collecting the first dust; and a second dust chamber 21b2 which is arranged on a part of a periphery of the first dust chamber and collects the second dust. A second cylindrical centrifugal separation part has an outflow port discharging the second dust separated from the air into the second dust chamber and an outflow port discharging the air from which the second dust is removed outside. Visual inspection from the direction of a central axis of the first cylindrical centrifugal separation part is performed, and a central point of the outflow port is arranged shifted so that it is nearer the central axis side than the central point of the outflow port.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a dust collector and a vacuum cleaner including the dust collector.

  Patent Documents 1 to 3 include a plurality of stages of centrifugal separators for swirling air, and each of the centrifugal separators is configured to centrifuge and collect dust in different sizes in a dust collecting container. A vacuum cleaner has been proposed.

  More specifically, the dust collector provided in the multi-cyclone vacuum cleaners of Patent Documents 1 to 3 includes a first centrifugal separation unit that separates first relatively large dust contained in the air, The centrifuge unit having a plurality of second centrifuge units that separate second dust smaller than the first dust in the air that has passed through the centrifuge unit, and the first unit separated by the centrifuge unit And a dust collecting container having a first dust collecting chamber for storing the second dust collecting chamber and a second dust collecting chamber for storing the second dust.

JP 2013-236671 A JP 2006-205162 A JP 2012-236029 A

  In the dust collectors of Patent Documents 1 to 3, the plurality of second centrifugal separators have the discharge port for discharging the second dust separated from the air into the second dust collection chamber, and the second dust is removed. The outlet has an outlet through which air flows out into the cleaner body through a filter, and the central axis of the outlet and the central axis of the outlet are coaxial. In addition, the central axis of each second centrifugal separator is parallel to the central axis of the first centrifugal separator.

  According to the dust collector configured as described above, the second dust accumulated in the second dust collecting chamber re-flows into the second centrifugal separator from the discharge port during cleaning with the electric vacuum cleaner operated, and the filter. As a result, the filter may be clogged prematurely.

  This invention is made | formed in view of such a subject, and it aims at providing the dust collector which can suppress the reflow of the dust stored in the dust collecting container, and a vacuum cleaner provided with the same. To do.

Thus, according to the present invention, a dust cup having a bottom and an opening, and a centrifuge unit covering the opening of the dust cup,
The centrifuge unit is disposed around the first cylindrical centrifuge unit and a first cylindrical centrifuge unit that separates first dust in the air, and passes through the first cylindrical centrifuge unit. A plurality of second cylindrical centrifuges for separating second dust smaller than the first dust in the air,
The dust cup has a first dust collecting chamber for collecting the first dust, and a second dust collecting chamber arranged in a part of the periphery of the first dust collecting chamber for collecting the second dust. And
The plurality of second cylindrical centrifuges discharges the second dust separated from the air into the second dust collection chamber and causes the air from which the second dust has been removed to flow out to the outside. An outlet and
The dust collector is arranged so that the center point of the discharge port is shifted from the center point of the outflow port to the center axis side as viewed from the direction of the center axis of the first cylindrical centrifuge. Is provided.

  Moreover, according to another viewpoint of this invention, the vacuum cleaner provided with the vacuum cleaner main body and the said dust collector attached with the said vacuum cleaner main body so that attachment or detachment is possible is provided.

In the dust collector of the present invention, the center point of the discharge port and the center point of the outlet in the second cylindrical centrifuge part are visually determined from the direction of the central axis of the first cylindrical centrifuge part. It is arranged on the radiation centered on the axis and shifted so that the center point of the discharge port is closer to the center axis side than the center point of the outlet.
With this configuration, the second dust accumulated in the second dust collecting chamber of the dust cup as the dust collecting container during the cleaning with the electric vacuum cleaner provided with the dust collecting device of the present invention operated is second centrifuge from the discharge port. It is possible to suppress re-inflow into the separation part. As a result, it is possible to suppress the problem that the second dust reflowed into the second centrifugal separator flows out to the filter side and the filter is clogged quickly, and the frequency of filter cleaning by the user can be reduced. .

It is a side view which shows Embodiment 1 of the vacuum cleaner of this invention. It is a sectional side view of the vacuum cleaner of Embodiment 1. It is a perspective view which shows the dust cup unit in the vacuum cleaner of Embodiment 1. FIG. It is a front view of the dust cup unit of FIG. It is a top view of the dust cup unit of FIG. It is a bottom view of the dust cup unit of FIG. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. FIG. 8 is a cross-sectional view taken along line B-B in FIG. 7. It is CC sectional view taken on the line of FIG. It is DD sectional view taken on the line in FIG. It is a perspective view which shows the centrifuge unit in the dust cup unit of FIG. It is an exploded view of the centrifuge unit of FIG. It is a bottom view of the centrifuge unit of FIG. It is the EE arrow directional cross-sectional view of FIG. It is the schematic which looked at the cleaner body in Embodiment 1 from the front. It is the schematic which looked at the cleaner body as a comparative example from the front. It is a FIG. 10 corresponding view of the dust cup unit in Embodiment 2.

(Embodiment 1)
FIG. 1 is a side view showing a first embodiment of the electric vacuum cleaner of the present invention, and FIG. 2 is a side sectional view of the electric vacuum cleaner according to the first embodiment.
The vacuum cleaner 1 includes a vacuum cleaner main body 10 and a dust cup unit 20 as a dust collector that is detachably attached to the vacuum cleaner main body 10.
In the first embodiment, the hand-held vacuum cleaner 1 is illustrated, but the dust collector of the present invention is not limited to the hand-held vacuum cleaner, and can be applied to canister-type and upright-type vacuum cleaners. It is.

<About the vacuum cleaner body>
Cleaner body 10 includes a main body 11 having a built-in electric blower 11a and the battery 11b _1, a handle 12 provided at the rear end of the main body portion 11, is provided to project forward from the front end of the main body portion 11 It has an air suction tube portion 13 and the overall shape is substantially a pistol shape. In the present specification, the front / rear / left / right / up / down directions refer to the front / rear / left / right / up / down directions of the vacuum cleaner 1 in a state where the handle 12 is held and held in the horizontal direction.

The main body 11 has a battery mounting portion 11b for detachably mounting the battery 11b ₁ on the upper front portion of the handle 12, and the dust cup unit 20 will be described below the air suction tube 13 at the front end of the main body 11. And a connection opening 11c (see FIG. 15A) that can be connected to the filter 23.

The battery mounting portion 11b has an openable and closable battery cover 11b ₂ that constitutes the upper portion of the main body 11, and a battery mounting space that is exposed to the outside by opening the rear end of the battery cover 11b ₂ upward. A plurality of terminal portions that can be electrically connected to the positive and negative terminals of the battery 11b ₁ are provided at the back of the mounting space.
The handle 12 is provided with an operation unit 12a having a plurality of switches.

As shown in FIGS. 1, 2, and 15 (A), the connection opening portion 11 c includes an opening portion 11 c ₁ that communicates with the main body portion 11 and a packing 11 c ₂ provided around the opening portion 11 c ₁ . The outer shape of the connection opening 11c will be described later.
In the main body 11, an electric blower 11a is provided behind the connection opening 11c, and an exhaust port (not shown) is provided on the right side surface of the casing constituting the main body 11, and passes through the electric blower 11a. Air is discharged from the exhaust port to the outside.

The hollow air suction tube portion 13 includes an air inlet port portion 13a provided at the front end, an air outlet port portion 13b provided at the lower rear portion, and a lock portion 13c provided at the lower front portion. In the case of 1, the brush 13d is foldably attached to the air inlet 13a.
The lock portion 13c includes a locking projection 13c ₁ and a coil spring 13c ₂ that urges the locking projection 13c ₁ rearward.

<Dust cup unit>
3 is a perspective view showing a dust cup unit in the electric vacuum cleaner of Embodiment 1, FIG. 4 is a front view of the dust cup unit of FIG. 3, and FIG. 5 is a plan view of the dust cup unit of FIG. . 6 is a bottom view of the dust cup unit of FIG. 3, and FIG. 7 is a cross-sectional view taken along line AA in FIG. 8 is a cross-sectional view taken along line BB in FIG. 7, FIG. 9 is a cross-sectional view taken along line CC in FIG. 7, and FIG. 10 is a cross-sectional view taken along line DD in FIG. It is.

  The dust cup unit 20 includes a dust cup 21 having a bottom 21 a and an opening that opens upward, a centrifuge unit 22 that covers the opening of the dust cup 21, a filter 23, and a cup cover 24.

[Dust cup]
Dust cup 21 includes a condenser and the first dust collecting chamber 21b ₁ to the dust collecting a first dust, the first dust smaller than the second dust is disposed in a part of the periphery of the first dust collecting chamber 21b ₁ And a second dust collecting chamber 21b _{2 for} dusting.

The first dust collecting chamber 21b ₁ is formed in a cylindrical shape having substantially the same diameter and having a circular bottom and a circular opening. Further, an air introduction port portion 21b ₁₁ is provided in a part of the outer peripheral wall of the first dust collecting chamber 21b ₁ , and the locking convex portion 13c of the lock portion 13c of the cleaner body 10 is provided on the bottom portion 21a side of the outer peripheral wall. A locking recess 21b ₁₂ that can be locked to ₁ is provided. In this case, as shown in FIG. 9, in plan view, the air introduction port portion 21b ₁₁ protrudes in a tangential direction with respect to the outer peripheral wall of the first dust collecting chamber 21b ₁ , and the locking recess portion 21b ₁₂ has an air introduction port. It is located slightly away than directly below the parts 21b _11.

The second dust collection chamber 21b ₂ is a space in a circular arc shape (C shape) in plan view provided not on the entire circumference of the first dust collection chamber 21b ₁ but on a part of the periphery, and the second dust collection chamber 21b _2. The inner peripheral surface is constituted by a part of the outer peripheral surface of the first dust collecting chamber 21b ₁ . That is, the second dust collection chamber 21b ₂ is a portion of the engagement recess 21b ₁₂ and the air inlet portion 21b ₁₁ of the first surrounding dust collection chamber 21b ₁ is not provided, the first dust collecting chamber 21b ₁ The center angle α in the case of the first embodiment is 180 ° or more, specifically about 240 °.

Further, the second dust collection chamber 21b ₂ has the same depth as the first dust collection chamber 21b _1, and the upper opening thereof is slightly widened upward (see FIG. 10). Further, both end surfaces 21b _{21 in} the circumferential direction of the second dust collecting chamber 21b ₂ are formed as vertical surfaces parallel to the opening end surface of the air inlet port portion 21b ₁₁ (see FIG. 3).

The flange-shaped opening end portion 21x of the dust cup 21 thus configured has a small-diameter arc-shaped portion that is a part of the outer peripheral wall of the first dust collection chamber 21b ₁ and the second dust collection chamber 21b ₂ . A large-diameter arc-shaped portion which is an outer peripheral wall and a shape having straight portions connecting both ends of these arc-shaped portions, that is, a shape in which a middle portion of a substantially semicircular straight portion is swollen (see FIG. 9). Note that the outer shapes of the centrifuge unit 22 and the cup cover 24 described later also correspond to the shape of the open end 21x of the dust cup 21.

[Centrifuge unit]
11 is a perspective view showing a centrifuge unit in the dust cup unit of FIG. 3, FIG. 12 is an exploded view of the centrifuge unit of FIG. 11, and FIG. 13 is a bottom view of the centrifuge unit of FIG. 14 is a cross-sectional view taken along line EE in FIG.
The centrifuge unit 22 includes a first cylindrical centrifuge 22a and a plurality of second cylindrical centrifuges 22b arranged around the first cylindrical centrifuge 22a.

  Specifically, the centrifuge unit 22 is configured by combining the first part 22x, the second part 22y, and the third part 22z shown in FIG. 12 as shown in FIG.

The first part 22x, the bottom 22x _11, upper opening 22x ₁₂ and a plurality of slits 22x ₁₃ and cylindrical body portion 22x ₁ having an outer peripheral portion is formed, the cylindrical body portion 22x so as to cover the slit 22x ₁₃ and a mesh member 22x ₂ wound around the _1, constituting the first cylindrical centrifuge unit 22a. Incidentally, the mesh member 22x ₂ is not shown except in Figure 11.

The second part 22y includes a plate portion 22y ₁ of the same outer shape as the outer shape of the opening edge of the dust cup 21, a plurality of the outer cylinder portion 22y ₂ formed unitedly with the plate portion 22y _1, The lower part of the plurality of second cylindrical centrifuges 22b is configured.

The plate portion 22y ₁ has a circular concave portion 22y ₁₂ having a circular large-diameter hole portion 22y ₁₁ and a plurality of circular small-diameter hole portions 22y ₁₃ provided in a part of the periphery of the circular concave portion 22y ₁₂ . In the case of the first embodiment, the plate portion 22y ₁ has eight small-diameter hole portions 22y ₁₃ having the same diameter arranged in close proximity to the C shape in a plan view, and C having these small-diameter hole portions 22y _13. The shape area is the large-diameter arc portion 22yb, and the circular area other than the large-diameter arc portion 22yb is the small-diameter portion 22ya. Then, the lower surface of the plate portion 22y _1, with the inner packing 22y ₃ provided around the large-diameter hole portion 22y _11, an outer gasket 22y ₄ are provided along the outer periphery.

The plurality of outer cylinder portions 22y ₂ are provided while reducing in diameter downward from the opening end portions of the plurality of small diameter hole portions 22y ₁₃ , and the lower end opening portions 22y _{21 of} the respective outer cylinder portions 22y ₂ are provided with large diameter holes. outer is slightly curved so as to be positioned displaced to the center side parts 22y _11.
The open end of the lower surface of the large diameter hole portion 22y ₁₁ of the second part 22y, upper opening 22x ₁₂ of the cylindrical body portion 22x ₁ of the first part 22x, for example be joined by gluing. Further, a rotary lock mechanism may be provided so as to be detachable.

FIGS 8, 11 and as shown in 12, the third part 22z includes an outer peripheral wall portion 22z ₁ having the same contour as the plate portion 22y ₁ of the outer shape of the second part 22y, the upper end portion of the outer peripheral wall portion 22z ₁ An upper wall portion 22z ₂ having a plurality of hole portions 22z ₂₁ having the same diameter provided in the upper wall portion 22z and a plurality of inner cylinder portions 22z ₃ suspended from the lower surface of the upper wall portion 22z ₂ so as to communicate with each hole portion 22z _21. When, a peripheral wall portion 22z ₄ among provided vertically on the lower surface of the upper wall portion 22z ₂ along the respective inner tubular portion 22z ₃ siege to and the inner face of the outer peripheral wall portion 22z _1, the outer peripheral portion of the upper wall portion 22z ₂ And a hood portion 22z ₅ having a circular upper opening portion 22z ₅₁ provided along the upper portion of the plurality of second cylindrical centrifuge portions 22b.

Further, a plurality in the third part 22z, the portion surrounding each inner tubular portion 22z ₃ of the inner circumferential wall portion 22z _4, which communicates with the surrounding space of the inner circumferential wall inner space and the inner tube portion 22z ₃ of 22z ₄ The communication slit 22z ₄₁ is formed. Note that these communication slits 22z ₄₁ are easy to flow into the surrounding space of each inner cylinder portion 22z ₃ when viewed in a plan view, the air swirling counterclockwise (arrow F direction) in the inner space of the inner peripheral wall portion 22z _4. Formed by position and angle.

Thus with a lower end portion of the outer peripheral wall portion 22z ₁ of the third part 22z constructed it is joined hermetically to the outer peripheral portion upper surface of the plate portion 22y ₁ for example by adhesion of the second part 22y, among the third component 22z the lower end of the peripheral wall portion 22z ₄ is joined hermetically by e.g. adhesive to the open end portion upper face of the upper end face and the small-diameter hole portion 22y ₁₃ of the circular recess 22y ₁₂ of the plate portion 22y ₁ of the second part 22y. Thus, the inner tubular portion 22z ₃ of the third part 22z is placed on the same axis in the second part the small-diameter hole portion 22y ₁₃ of 22y.

In the centrifuge unit 22 configured as described above, the plurality of second cylindrical centrifuge units 22b discharges the second dust separated from the air into the second dust collecting chamber 21b ₂ and discharge ports 22y _21. And an outlet 22z ₂₁ through which the air from which the second dust is removed flows out. In other words, the outlet 22y ₂₁ of the second cylindrical centrifuge unit 22b is a bottom opening 22y ₂₁ of the outer cylindrical portion 22y _2, wherein the outlet 22z ₂₁ of the second cylindrical centrifuge unit 22b and the third This is the hole 22z ₂₁ of the component 22z. The plurality of outlets 22y ₂₁ have the same diameter, and the plurality of outlets 22z ₂₁ have the same diameter.

Then, as shown in FIG. 13, as a characteristic first configuration of the centrifugal separation unit 22, and visible from the first direction of the central axis G ₁ of the first cylindrical centrifuge section 22a, of the second center point G ₂₂ of the center point G ₂₁ and the outlet 22z ₂₁ outlet 22y ₂₁ in the cylindrical centrifuge unit 22b, on the radiation R around the first central axis G _1, and the center of the outlet 22y ₂₁ The point G ₂₁ is shifted and disposed so as to be closer to the first central axis G ₁ than the center point G ₂₂ of the outlet 22z ₂₁ .
Also shifted the outer periphery of the outlet 22y ₂₁ to fit within the outer periphery of the small-diameter hole portion 22y ₁₃ as shown in FIG. That is, it is shifted to a position where the outer periphery and the outer periphery are almost in contact.

Further, as shown in FIG. 14, as a characteristic second configuration of the centrifugal separation unit 22, and visible from a direction perpendicular to the first center axis G ₁ of the first cylindrical centrifuge unit 22a, second second central axis G ₂ connecting the center point G ₂₁ and the center point G ₂₂ of the outlet 22z ₂₁ outlet 22y ₂₁ is curved in a cylindrical centrifuge unit 22b. Specifically, curved as a second central axis G ₂ inside the outer cylinder portion 22y ₂ is toward the center point G ₂₁ of the outlet 22y ₂₁ inward (first center axis G ₁ side).

Furthermore, as shown in FIG. 13, as a characteristic third configuration of the centrifugal separation unit 22, the second cylindrical centrifugation unit 22b, the center of the outflow port 22z ₂₁ and the center point G ₂₁ of the outlet 22y ₂₁ The point G ₂₂ is arranged on _two concentric circles O ₁ and O ₂ centered on the first central axis G ₁ .

〔filter〕
As shown in FIGS. 3, 5, 7 and 10, the filter 23 is provided on a short cylindrical frame 23a, a pleated filter body 23b provided in the frame 23a, and an outer peripheral surface of the frame 23a. Packing 23c. The outer diameter of the packing 23c portion of the filter 23 is set to a dimension slightly larger than the diameter of the circular upper opening 22z ₅₁ of the hood portion 22z ₅ of the centrifugal separation unit 22.

  When removing the dust adhering to the filter 23, the dust of the filter body 23b is removed using an attached brush (not shown), and the handle of the brush is rubbed against a plurality of peaks of the filter body 23b to vibrate. Dust can be removed.

[Cup cover]
The cup cover 24 includes an upper wall portion 24a having the same outer shape as the outer shape of the opening edge of the dust cup 21, and an outer peripheral wall portion 24b provided vertically along the outer peripheral end portion of the upper wall portion 24a.
Upper wall portion 24a, together with a slightly smaller opening 24a ₁ than frame 23a of the filter 23, the annular rib 24a ₂ on the outer peripheral portion of the opening portion 24a ₁ is provided below the projecting shape of the lower surface.

<Assembly and disassembly of the dust cup unit>
An example of the assembly of the dust cup 21, the centrifuge unit 22, the filter 23, and the cup cover 24 configured as described above will be described below.
As shown in FIG. 10, first, the filter 23 is installed in the annular rib 24 a ₂ of the cup cover 24. As a result, the annular rib 24a ₂ comes into close contact with the packing 23c of the filter 23.

Subsequently, the centrifuge unit 22 is installed in the cup cover 24 so that the filter 23 is inserted into the circular upper opening 22z ₅₁ of the hood 22z ₅ . At this time, the outer shape of the opening of the outer peripheral wall 24b of the cup cover 24 and the outer shape of the centrifuge unit 22 are matched.

  Next, the cup cover 24 incorporating the filter 23 and the centrifuge unit 22 is fitted into the opening of the dust cup 21 so that the first part 22x of the centrifuge unit 22 is inserted into the dust cup 21. At this time, the outer shape of the opening of the outer peripheral wall 24b of the cup cover 24 and the outer shape of the opening of the dust cup 21 are matched.

Thus, the outer tubular portion of the first tubular centrifugation portion 22a (first part 22x) together with is inserted into the first dust collecting chamber 21b _1, a plurality of second cylindrical centrifuge unit 22b 22y ₂ is inserted into the second dust collection chamber 21b _2. Further, the flange-shaped opening edge 21x of the dust cup 21 is brought into close contact with the outer gasket 22y ₄ cup cover 24, the open end of the first dust collecting chamber 21b ₁ is in close contact with the inner packing 22y _3.

  The dust cup unit 20 assembled in this way can be disassembled into a dust cup 21, a centrifuge unit 22, a filter 23, and a cup cover 24 in the reverse order of the assembly order, and washing them individually with water. Can do.

<Attaching the dust cup unit to the vacuum cleaner body>
When the dust cup unit 20 is attached to the cleaner body 10, the flat upper surface (see FIG. 5) of the upper wall portion 24a of the cup cover 24 is connected to the connection opening 11c of the cleaner body 10 (see FIG. 15A). while pressing the, engaging the locking recess 21b ₁₂ of the dust cup 21 to the locking portion 13c ₁ of the cleaner body 10.

At this time, the open end of the engagement recess 21b ₁₂ of the dust cup 21 against the urging force of the coil spring 13c ₂ forces the locking projections 13c ₁ forward, the locking projections 13c ₁ is the open end fitted into the engagement recess 21b ₁₂ rides over the section. Further, the dust cup unit 20 via the engaging protrusion 13c ₁ by the coil spring 13c ₂ is pressed against the connection opening 11c of the cleaner body 10, around the connection opening of the opening portion 24a ₁ of the upper surface of the cup cover 24 11c pressed against the packing 11c ₂ of.

This prevents the dust cup unit 20 from being detached from the cleaner body 10 in the mounted state in which the dust cup unit 20 is placed along the air inlet tube portion 13 and the connection opening 11c of the cleaner body 10.
Further, in the mounted state, the air inlet port portion 21b ₁₁ of the dust cup unit 20 is in close contact with a packing (not shown) provided at the air outlet port portion 13b of the air suction port tube portion 13 of the cleaner body 10 (see FIG. 2). ).

  It should be noted that the dust cup unit 20 is pushed by pushing the dust cup unit 20 in the mounted state against the urging force of the coil spring 13c2 toward the locking projection 13c1 and tilting the cup cover 24 away from the connection opening 11c. Can be removed from the cleaner body 10.

FIG. 15A is a schematic view of the cleaner body in the first embodiment as viewed from the front, and FIG. 15B is a schematic view of the cleaner body as a comparative example as viewed from the front.
The vacuum cleaner 1 of the present invention has a plurality of second cylindrical shapes in the dust cup unit 20 in a state where the dust cup unit 20 is mounted along the air suction tube portion 13 and the connection opening portion 11c of the cleaner body 10. The centrifugal separator 22b and the second dust collecting chamber 21b ₂ are arranged in an arc shape so as to avoid the air suction cylinder 13 of the cleaner body 10.

  Therefore, the outer shape of the cleaner body 10 viewed from the front of the connection opening 11c has a large-diameter arc portion 11ca and a small-diameter arc portion 11cb as shown in FIG. Similar to the wall portion 24a, the middle portion of the substantially semicircular straight portion swells. Thereby, the housing | casing part connected to the small diameter circular arc part 11cb in the main-body part 11, ie, the whole housing | casing of the main-body part 11, is compactized.

On the other hand, as shown in FIG. 15B, when the entire connection opening 11cx is configured with the same outer diameter as the large-diameter arc portion 11ca, the casing connected to the connection opening 11cx in the main body portion 11x. The part becomes larger. That is, the height Hx of the main body 11x of the comparative example is higher than the height H of the main body 11 of the first embodiment, and the width Wx of the main body 11x of the comparative example is the width W of the main body 11 of the first embodiment. Wider than.
Therefore, according to the structure of the vacuum cleaner 1 of this invention, each housing | casing which comprises the dust cup unit 20 and the vacuum cleaner main body 10 is made compact and lightweight.

<About the operation of the vacuum cleaner>
The operation of the vacuum cleaner will be described with reference to FIGS. In addition, the thick line arrow in FIG.2, 8 and 10 has shown the flow of air.
When the electric blower 11a is driven, the inside of the vacuum cleaner 1 has a negative pressure, and air containing external dust flows into the air suction cylinder portion 13 from the air inlet portion 13a, and then the air outlet portion 13b and It passes through the air inlet 21 b ₁₁ and flows into the dust cup 21.

In the dust cup 21, the air containing a part of the dust passes through the mesh member 22x ₂ (see FIG. 11) of the first cylindrical centrifuge 22a of the centrifuge unit 22 while swirling. At this time, the large first dust cannot pass through the mesh member 22x ₂ and accumulates in the first dust collecting chamber 21b ₁ of the dust cup 21, and air containing dust smaller than the first dust enters the centrifuge unit 22. Inflow.

The air containing dust smaller than the first dust that has passed through the first cylindrical centrifuge 22a swirls into a cylindrical space surrounded by the second part 22y and the third part 22z (see FIG. 12). It flows into the plurality of second cylindrical centrifuges 22b through the plurality of communication slits 22z ₄₁ arranged around the space.

Air containing less dust than the first dust that has flowed into the plurality of second cylindrical centrifuge unit 22b, toward the lower end opening while swirling around the respective inner tubular portion 22z _3, from the lower end opening toward the filter 23 through the inner tube portion 22z ₃ each. At this time, the second dust in the air is separated while turning around each inner cylindrical portion 22z ₃ and passes through each outer cylindrical portion 22y ₂ and accumulates in the second dust collecting chamber 21b ₂ of the dust cup 21. .

  The air that has passed through the plurality of second cylindrical centrifuges 22b may contain third dust that is smaller than the second dust. However, when the air passes through the filter main body 23b of the filter 23, the third dust is smaller. 3 is captured by the filter body 23b. Then, the clean air from which the third dust is removed passes through the electric blower 11a and is discharged to the outside from the exhaust port (not shown).

  As described above, the vacuum cleaner 1 of the present invention can separate and collect dusts of different sizes from the air in three stages, and thus collects fine dust even though it is a handy type and is clean. The air can be discharged indoors, and it is hygienic. Further, since it is compact and light as described above, it is easy for the user to handle.

Further, the first to third configurations (particularly the first and second configurations) that are characteristic of the present invention allow the vacuum cleaner 1 to be operated in the second dust collection chamber 21b ₂ during cleaning. can be accumulated second dust is prevented from reentering the outlet 22y ₂₁ to a second centrifugation unit 22b. As a result, it is possible to suppress the problem that the second dust reflowed into the second centrifugal separator flows out to the filter side and the filter is clogged quickly, and the frequency of filter cleaning by the user can be reduced. .

(Embodiment 2)
FIG. 16 is a view corresponding to FIG. 10 of the dust cup unit according to the second embodiment. In FIG. 16, the same elements as those in FIG. 10 are denoted by the same reference numerals.
The vacuum cleaner of the second embodiment is mainly different from the first embodiment in the dust cup, and the other configurations are substantially the same as those in the first embodiment.

In the first embodiment, the case where the first dust collection chamber 21b ₁ and the second dust collection chamber 21b ₂ have the same depth is exemplified. However, in the second embodiment, the depth Q ₂ of the second dust collection chamber 121b ₂ is illustrated. Is shallower than the depth Q ₁ of the first dust collection chamber 21b ₁ . Thereby, the outer diameter dimension S by the side of the bottom part 21a of the dust cup 121 can be made small.

Furthermore, in the case of Embodiment 2, the entire _second dust collecting chamber 121b ₂ is reduced in diameter toward the bottom 21a of the dust cup 121. Thereby, the dust cup 121 can be gradually made thin toward the bottom part 21a.
As a result, the slim and lighter dust cup unit 120 can be obtained. Moreover, in this form, since the distance from an opening edge part to a 2nd dust collection chamber bottom becomes small, it becomes easy to care for a 2nd dust collection chamber.

(Embodiment 3)
The dust collector of the present invention can be applied to a canister type or upright type vacuum cleaner in addition to the handheld vacuum cleaner shown in the first embodiment.
Moreover, in Embodiment 1, although the case where the 8 2nd cylindrical centrifuge part 22b in the dust cup unit 20 as a dust collector was arrange | positioned along with the continuous circular arc shape was illustrated, for example, The two cylindrical centrifuges 22b may be divided into two groups of four and arranged on the left and right. Alternatively, a plurality of second cylindrical centrifuge parts 22b may be arranged on the entire circumference of the first cylindrical centrifuge part 22a, and in this case, the outside of the connection part of the dust cup unit with the cleaner body. It is suitable for a canister type or upright type vacuum cleaner that easily allows the diameter to be larger than that of the dust collector of the first embodiment.

(Embodiment 4)
In the first embodiment, in the centrifuge unit 22, the center of the discharge port 22y ₂₁ in the second cylindrical centrifuge 22b as viewed from the direction orthogonal to the central axis G1 of the _first cylindrical centrifuge 22a. in the case where the central axis G ₂ connecting the points G ₂₁ and the center point ₂₂ of the outlet 22z ₂₁ is gently curved was exemplified (see FIG. 14), the present invention is the curved portion of the central axis G ₂ linear There may be. In short, and visible from the direction of the central axis G ₁ of the first cylindrical centrifuge unit 22a, the center of the outflow port 22z ₂₁ and the center point G ₂₁ of the outlet 22y ₂₁ in the second cylindrical centrifugation unit 22b point _22, on the radiation R around the center axis G _1, and then shifted so that the center point G ₂₁ of the outlet 22y ₂₁ is the central axis G ₁ side from the center point ₂₂ of the outlet 22z ₂₁ It only has to be arranged (see FIG. 13).

(Summary)
The dust collector of the present invention comprises a dust cup having a bottom and an opening, and a centrifuge unit that covers the opening of the dust cup,
The centrifuge unit is disposed around the first cylindrical centrifuge unit and a first cylindrical centrifuge unit that separates first dust in the air, and passes through the first cylindrical centrifuge unit. A plurality of second cylindrical centrifuges for separating second dust smaller than the first dust in the air,
The dust cup has a first dust collecting chamber for collecting the first dust, and a second dust collecting chamber arranged in a part of the periphery of the first dust collecting chamber for collecting the second dust. And
The plurality of second cylindrical centrifuges discharges the second dust separated from the air into the second dust collection chamber and causes the air from which the second dust has been removed to flow out to the outside. An outlet and
When viewed from the direction of the central axis of the first cylindrical centrifuge, the center point of the outlet and the center point of the outlet in the second cylindrical centrifuge are radiation centered on the central axis. It is arranged so that the center point of the discharge port is shifted from the center point of the outlet to the central axis side.

The vacuum cleaner of this invention may be comprised as follows, and may combine these suitably.
(1) A central axis connecting the central point of the outlet and the central point of the outlet in the second cylindrical centrifugal separator as viewed from the direction orthogonal to the central axis of the first cylindrical centrifugal separator. May be curved.
If it does in this way, at the time of operation of a vacuum cleaner provided with the dust collecting device of the present invention, reflow of the 2nd dust in the 2nd dust collection room to the 2nd centrifuge part can further be controlled. .

(2) In the second cylindrical centrifuge, the center point of the discharge port and the center point of the outlet may be arranged on two concentric circles centered on the central axis.
In this way, a compact dust collector can be obtained.

(3) When the second dust collection chamber is formed in an arc shape when viewed from the opening side of the dust cup, and the plurality of second cylindrical centrifugal separation portions are arranged in an arc shape. Good.
In this way, a more compact dust collector can be obtained, which is particularly suitable for a hand-held vacuum cleaner.

  In addition, according to the present invention, a hand-held type, a canister type, an upright type, and the like that include a vacuum cleaner main body and the dust collector that is detachably attached to the vacuum cleaner main body can suppress clogging of the filter. A vacuum cleaner is provided.

  The disclosed embodiments should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Handheld vacuum cleaner 10 Vacuum cleaner body 20 Dust cup unit (dust collector)
21 dust cup 21a bottom 21b ₁ first dust collecting chamber 21b ₂ second dust collecting chamber 22 centrifuge unit 22a first cylindrical centrifuge 22b second cylindrical centrifuge 22y ₂₁ outlet (lower end opening)
22z ₂₁ outlet (hole)
G ₁ and G ₂ center axes G ₂₁ and G ₂₂ center points O ₁ and O ₂ concentric circles R radiation

Claims (5)

A dust cup having a bottom and an opening, and a centrifuge unit covering the opening of the dust cup,
The centrifuge unit is disposed around the first cylindrical centrifuge unit and a first cylindrical centrifuge unit that separates first dust in the air, and passes through the first cylindrical centrifuge unit. A plurality of second cylindrical centrifuges for separating second dust smaller than the first dust in the air,
The dust cup has a first dust collecting chamber for collecting the first dust, and a second dust collecting chamber arranged in a part of the periphery of the first dust collecting chamber for collecting the second dust. And
The plurality of second cylindrical centrifuges discharges the second dust separated from the air into the second dust collection chamber and causes the air from which the second dust has been removed to flow out to the outside. An outlet and
When viewed from the direction of the central axis of the first cylindrical centrifuge, the central point of the discharge port is shifted so as to be closer to the central axis than the central point of the outlet. Dust collector.   The central axis connecting the central point of the outlet and the central point of the outlet in the second cylindrical centrifugal separator is curved as viewed from a direction orthogonal to the central axis of the first cylindrical centrifugal separator. The dust collector according to claim 1.   3. The dust collecting device according to claim 1, wherein in the second cylindrical centrifugal separator, the center point of the discharge port and the center point of the outlet port are arranged on two concentric circles centering on the center axis. apparatus.   The second dust collection chamber is formed in an arc shape when viewed from the opening side of the dust cup, and the plurality of second cylindrical centrifuge portions are arranged in an arc shape. The dust collector as described in any one of -3.   The vacuum cleaner provided with the vacuum cleaner main body and the dust collector as described in any one of Claims 1-4 attached to the said vacuum cleaner main body so that attachment or detachment is possible.

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