Dust collection device, cleaner equipped with dust collection device, recovery device for recovering dust from dust collection device, and cleaning tool set having dust collection device and recovery device

Abstract

To provide a technology to facilitate removal of dust in the state of being hooked on a filter part.SOLUTION: A dust collection device includes a dust storage container having an inflow port through which dust-containing air flows in when a suction source is activated, which is configured so that the air flowing in through the inflow port turns into a swirl flow, and a filter part housed in the dust storage container so as to form an annular space where the swirl flow flows between a peripheral wall part of the dust storage container and itself, for capturing dust while sucking air in the annular space by the suction force of the suction source. The dust storage container may include a bottom part for opening / closing an opening at the lower end of the dust storage container. The filter part may be formed with a first ventilation hole for sucking air in a direction folded from a direction that the swirl flow flows, and a second ventilation hole provided at a position closer to the bottom part than the first ventilation hole. The axial length of the second ventilation hole is shorter than that of the first ventilation hole.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a dust collecting device that collects dust, a vacuum cleaner equipped with the dust collecting device, a recovery device that recovers dust from the dust collecting device, and a cleaning tool set equipped with the dust collecting device and the recovery device. [Background technology]

[0002] Patent Document 1 discloses a vacuum cleaner 300 shown in Fig. 18. This vacuum cleaner 300 includes a vacuum cleaner body 310 incorporating a suction source that generates a suction force for sucking in dust, and a dust collecting device 320 attached to the underside of the vacuum cleaner body 310. A suction pipe 330 is disposed in front of the dust collecting device 320, forming a flow path through which dust flows.

[0003] As shown in Fig. 19, the dust collecting device 320 has a dust container 321 that opens upward, and a filter plate 322 that is provided to close the opening at the upper end of the dust container 321. The dust container 321 has a substantially cylindrical peripheral wall portion 324, and a bottom portion 325 that is configured to be able to open and close the opening at the lower end of the peripheral wall portion 324. The peripheral wall portion 324 is formed with an inlet 323 that opens in the tangential direction of the inner peripheral surface of the peripheral wall portion 324. The dust collecting device 320 is connected to the suction pipe 330 via the inlet 323 so that the internal space of the dust container 321 communicates with the flow path of the suction pipe 330.

[0004] The air that flows from the suction pipe 330 into the dust storage container 321 through the inlet 323 contains dust. Since the inlet 323 opens in the tangential direction of the inner peripheral surface of the peripheral wall portion 324, the air flows along the inner peripheral surface of the peripheral wall portion 324 and becomes a swirling flow. At this time, the dust contained in the air is centrifuged by the centrifugal force of the swirling flow, and accumulates on the bottom portion 325 while flowing near the inner peripheral surface of the peripheral wall portion 324. The bottom portion 325 is configured so that it can tilt downward from a closed position that closes the opening at the lower end of the peripheral wall portion 324 to open the opening at the lower end of the peripheral wall portion 324, as shown by the arrow in FIG. 20.

[0005] A cylindrical filter portion 326 that tapers downward is housed in dust storage container 321. Filter portion 326 is disposed below filter plate 322, and receives the suction force of the suction source through filter plate 322.

[0006] An annular space is formed between filter portion 326 and peripheral wall portion 324 of dust storage container 321, and the above-mentioned swirling flow flows through this annular space. As shown in Fig. 21, filter portion 326 is formed with a large number of air vents 327, and when the suction force of the suction source acts on the inside of filter portion 326, air in this annular space is drawn into filter portion 326 through air vents 327. Meanwhile, dust contained in the air flows near the inner circumferential surface of peripheral wall portion 324 of dust storage container 321 rather than near filter portion 326 due to the centrifugal force of the swirling flow. For this reason, dust is less likely to clog air vents 327 of filter portion 326.

[0007] Filter section 326 is provided with guide section 328 that guides dust contained in the swirling flow downward (i.e., toward bottom section 325), and thin plate-like partition section 329 that extends from guide section 328 in the flow direction of the swirling flow. Guide section 328 extends in the circumferential direction at an angle downward in the flow direction of the swirling flow. The space below partition section 329 is a dust storage space for storing dust. Partition section 329 prevents dust in the dust storage space from flying up. Note that the above-mentioned ventilation hole 327 is not formed below partition section 329, but is formed above partition section 329.

[0008] When the swirling flow reaches guide portion 328, it flows obliquely downward according to the inclination of guide portion 328 and flows into the dust storage space. Then, the dust contained in the swirling flow is accumulated in the dust storage space. The dust accumulated in the dust storage space is discarded from dust storage container 321 by opening bottom portion 325. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2023-42477 A Summary of the Invention [Problem to be solved by the invention]

[0010] If the ventilation hole 327 is formed below the partition 329, more air can be sucked into the dust collecting device 320 through the inlet 323, and the suction capacity of the vacuum cleaner can be improved. However, in this case, the following problems may occur.

[0011] The dust may include thin and long particles such as hair. It is assumed that the thin and long particles may become caught in the ventilation hole 327. If the suction source is stopped in this state, the thin and long particles will hang down from the ventilation hole 327.

[0012] When thin and long dust particles are caught in vent hole 327 above partition 329, this vent hole 327 is far from bottom 325, so even if a user opens bottom 325, the thin and long dust particles are unlikely to hang down beyond the opening at the lower end of dust container 321. On the other hand, when thin and long dust particles are caught in vent hole 327 below partition 329, this vent hole 327 is close to bottom 325, so the thin and long dust particles are likely to hang down beyond the opening at the lower end of dust container 321.

[0013] If a user closes the bottom of dust container 321 while the elongated dust is hanging down beyond the opening at the lower end of dust container 321, the dust may hang down from the outer edge of bottom 325 and protrude outside dust container 321. A user may feel that the elongated dust protruding from dust container 321 is unsanitary.

[0014] The present disclosure aims to provide a technique for easily removing dust trapped in a filter portion. [Means for solving the problem]

[0015] The dust collecting device in the present disclosure is attached to a vacuum cleaner having a suction source that generates a suction force for sucking in dust. The dust collecting device includes a dust storage container having an inlet through which dust-containing air flows by the suction force of the suction source, and configured so that the air flowing in through the inlet becomes a swirling flow, and a filter unit that is accommodated in the dust storage container so as to form an annular space through which the swirling flow flows between the dust storage container and a peripheral wall part, and captures dust while sucking in the air in the annular space by the suction force of the suction source. The dust storage container has a bottom that opens and closes an opening at the lower end of the dust storage container. The filter unit is formed with a first air hole that is drilled obliquely with respect to the outer surface of the filter unit so as to suck in air in a direction that turns back from the direction in which the swirling flow flows, and a second air hole that is provided at a position closer to the bottom than the first air hole. The axial length of the second air hole is shorter than that of the first air hole.

[0016] The vacuum cleaner of the present disclosure includes a suction source that generates a suction force for sucking in dust, the above-mentioned dust collecting device, and a suction pipe that forms a flow path through which air containing dust flows by the suction force of the suction source. The flow path of the suction pipe is in communication with an inlet of the dust collecting device.

[0017] The collection device in the present disclosure includes a support portion configured to support the above-mentioned dust collecting device, and a collection source that applies a downward suction force to the bottom of the dust storage container of the dust collecting device supported by the support portion to open the opening of the dust storage container and suck out the dust inside the dust storage container.

[0018] The cleaning tool set disclosed herein includes the above-mentioned dust collecting device and a recovery device that recovers dust from the dust collecting device. The recovery device has a support portion configured to be able to support the dust collecting device, and a recovery source that applies a downward dust suction force to a bottom of a dust storage container of the dust collecting device supported by the support portion to open an opening of the dust storage container and suck out dust from the dust storage container. Effect of the Invention

[0019] The above-mentioned technique makes it possible to easily remove dust trapped in the filter portion. [Brief description of the drawings]

[0020] [Figure 1] Side view of a vacuum cleaner (first embodiment) [Diagram 2] A perspective view of a dust collecting device of a vacuum cleaner. [Diagram 3] Cross-sectional view of dust collector [Figure 4] FIG. 1 is a cross-sectional view of the dust collecting device around a first vent hole and a second vent hole; [Diagram 5] Perspective view of the dust collecting device [Figure 6] Rear view of the filter part of the dust collector [Figure 7] Cross-sectional view of dust collector [Figure 8] FIG. 1 is a cross-sectional view of the dust collecting device around a first vent hole and a second vent hole; [Figure 9] A vertical cross-sectional view of the dust collector around the second vent hole. [Figure 10] A longitudinal sectional view of another dust collector. [Figure 11] A cross-sectional view of the dust collector around the second vent hole. [Figure 12] A cross-sectional view of the dust collector around the first vent hole. [Figure 13] FIG. 11 is a perspective view of a cleaning tool set (second embodiment); [Figure 14] Vertical cross-section of cleaning tool set [Figure 15] FIG. 3 is a perspective view of a collecting device for the cleaning tool set; [Figure 16] A longitudinal cross-sectional view of a portion of the recovery device. [Figure 17] FIG. 13 is a perspective view of a dust collecting device (third embodiment); [Figure 18] A perspective view of a conventional vacuum cleaner [Figure 19] 1 is a perspective view of a dust collecting device of a conventional vacuum cleaner; [Figure 20] Cross-sectional view of a conventional dust collector [Figure 21] FIG. 1 is a perspective view of a filter portion of a conventional dust collecting device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the first to third embodiments will be described in detail with reference to the drawings. However, in order to facilitate understanding by those skilled in the art, for example, detailed explanations of already well-known matters or duplicate explanations of substantially the same configurations may be omitted. Note that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0022] First Embodiment Fig. 1 is a side view of a stick type vacuum cleaner 100. The vacuum cleaner 100 will be described with reference to Fig. 1.

[0023] (Overall structure of the vacuum cleaner) The vacuum cleaner 100 includes a vacuum cleaner body 110 incorporating a suction source 111 that generates a suction force for sucking in dust, and a dust collecting device 200 attached to the underside of the vacuum cleaner body 110. The suction source 111 is configured to suck air inside the dust collecting device 200, and may have, for example, a motor that generates a rotational force, and a rotating blade configured to generate an upward airflow when rotated by the motor.

[0024] A filter 112 that allows air to pass while capturing dust contained in the air is disposed between the vacuum cleaner body 110 and the dust collecting device 200. Also, a grip part 113 formed so that the user can grip it, and a suction pipe 120 that forms a flow path 123 through which air containing dust flows by the suction force of the suction source 111 are disposed on the front side of the vacuum cleaner body 110 and the dust collecting device 200.

[0025] The suction tube 120 extends in the vertical direction below the grip part 113. In detail, the suction tube 120 has a base end tube part 121 formed integrally with the vacuum cleaner body 110 and the grip part 113, and an extension tube part 122 extending downward from the base end tube part 121. In the base end tube part 121, a flow path 123 is bent toward the dust collection device 200. The extension tube part 122 is detachable from the base end tube part 121. A suction nozzle 130 is attached to the lower end of the extension tube part 122, through which dust on the floor surface is sucked in by the suction force of the suction source 111.

[0026] As shown in Fig. 2, the dust collecting device 200 has a dust container 210 that opens upward, and an upper lid 220 that closes the opening at the upper end of the dust container 210. The upper part of the upper lid 220 is configured so that the filter 112 shown in Fig. 1 can be placed on it. The upper lid 220 has a plurality of through holes 221 that penetrate the upper lid 220 in the vertical direction, and when the suction source 111 shown in Fig. 1 is activated, the air in the dust container 210 flows out through these through holes 221.

[0027] As shown in Figs. 2 and 3, the dust container 210 has a substantially cylindrical peripheral wall 211 and a bottom 212 that closes the opening at the lower end of the peripheral wall 211, and the peripheral wall 211 and the bottom 212 are made of an opaque plastic material. The peripheral wall 211 has an inlet 239 that is connected to the flow path 123 of the base end pipe 121 shown in Fig. 1. When the suction source 111 is activated, air containing dust flows into the inlet 239 through the flow path 123. The inlet 239 opens in the tangential direction of the inner circumferential surface 217 of the peripheral wall 211. Therefore, the air that flows into the dust container 210 through the inlet 239 flows along the inner circumferential surface 217 and becomes a swirling flow. Most of the dust contained in the air flows near the inner circumferential surface 217 of the peripheral wall 211 due to the centrifugal force of the swirling flow.

[0028] The bottom 212 is connected to the peripheral wall 211 via a rotating shaft 213 shown in Fig. 3. When a user applies a downward external force to the bottom 212, the bottom 212 rotates downward about the rotating shaft 213, and the opening at the lower end of the peripheral wall 211 is opened. A torsion spring 214 is attached to the rotating shaft 213, and the bottom 212 is biased by the torsion spring 214 in a direction to close the opening at the lower end of the peripheral wall 211.

[0029] At a position facing the rotating shaft portion 213 in the radial direction of the dust container 210, an engagement claw portion 219 formed to be able to engage with the outer circumferential edge portion of the bottom portion 212 is provided. The engagement claw portion 219 is attached to the peripheral wall portion 211 so as to be able to rotate in the direction of the arrow in Fig. 3. When a user rotates the engagement claw portion 219 in the direction of the arrow in Fig. 3, the engagement of the engagement claw portion 219 with the bottom portion 212 is released. The engagement claw portion 219 is biased by a coil spring 215 in a direction in which it engages with the bottom portion 212 (the opposite direction to the arrow in Fig. 3).

[0030] 2, an accommodating recess 216 for accommodating the engaging claw 219 is formed in the lower part of the peripheral wall 211. When the engaging claw 219 is engaged with the bottom 212, the engaging claw 219 is recessed in the accommodating recess 216.

[0031] Dust container 210 accommodates a cylindrical filter portion 230 that becomes thinner toward bottom portion 212. Through hole 221 formed in upper lid portion 220 communicates with the internal space of filter portion 230, as shown in FIG.

[0032] The filter unit 230 is disposed approximately coaxially with the dust container 210, and an annular space 232 is formed between the filter unit 230 and the peripheral wall portion 211 of the dust container 210. The above-mentioned swirling flow flows through this annular space 232.

[0033] A thin plate-like partition 233 is attached to the filter part 230 so as to separate a part of the annular space 232 into upper and lower parts. The partition 233 is disposed below the inlet 239 and above the bottom part 212, and extends from the lower edge of the inlet 239 in the flow direction of the swirling flow in a substantially horizontal position, and separates the annular space 232 into upper and lower parts over a range of substantially half the circumference of the annular space 232.

[0034] In the following description, the space below the partition 233 (i.e., between the partition 233 and the bottom 212) is referred to as the "dust storage space 234." The dust storage space 234 is used to store dust. In order to promote dust storage in the dust storage space 234, a dust stopper 244 protrudes downward from the downstream end 241 of the partition 233, as shown in FIG. 2. The lower end of the dust stopper 244 is spaced upward from the bottom 212.

[0035] In the following description, a space extending in the circumferential direction above the partition portion 233 from the inlet 239 to the downstream end 241 of the partition portion 233 in the flow direction of the swirling flow is referred to as an "upstream space 271." The upstream space 271 communicates with the inlet 239 and has a circumferential length long enough for the air flowing in from the inlet 239 to become a swirling flow. The partition portion 233 separates the upstream space 271 and the dust storage space 234 into upper and lower parts, and prevents dust accumulated in the dust storage space 234 from flying up into the upstream space 271.

[0036] The filter section 230 is formed with a large number of ventilation holes having a size that allows air to pass through while being able to capture dust. In the following description, those of these ventilation holes formed at a position higher than the partition section 233 are referred to as "first ventilation holes 245." In the following description, those ventilation holes formed at a position lower than the partition section 233 and higher than the lower end of the dust stopper 244 are referred to as "second ventilation holes 246." In this embodiment, the first ventilation holes 245 and the second ventilation holes 246 are drilled in a substantially horizontal direction.

[0037] 4(a), the first ventilation hole 245 is formed in a direction in which air flows in a direction turning back from the direction in which the swirling flow flows. That is, the first ventilation hole 245 is formed such that the opening position of the first ventilation hole 245 on the outer surface of the filter part 230 is shifted in the flow direction of the swirling flow from the opening position of the first ventilation hole 245 on the inner surface of the filter part 230. In other words, the first ventilation hole 245 is provided to extend in an oblique direction with respect to the outer surface of the filter part 230 in a plan view.

[0038] When the first ventilation hole 245 is formed as shown in Fig. 4(a), air flowing near the outer surface of the filter unit 230 can be sucked in the direction of the dotted arrow in Fig. 4(a). On the other hand, when dust flows near the outer surface of the filter unit 230, a larger inertial force can act on the dust compared to air. If the inertial force acting on the dust overcomes the suction force acting through the first ventilation hole 245, the dust flows downstream without being sucked into the first ventilation hole 245.

[0039] On the other hand, as shown in Fig. 4(b), the second ventilation hole 246 is formed so that the opening position of the second ventilation hole 246 on the outer surface of the filter section 230 is not shifted in the flow direction of the swirling flow from the opening position of the second ventilation hole 246 on the inner surface of the filter section 230. In other words, in a plan view, the second ventilation hole 246 extends in a direction approximately perpendicular to the outer surface of the filter section 230. For this reason, the axial length of the second ventilation hole 246 is shorter than the axial length of the first ventilation hole 245. The axial lengths of the first ventilation hole 245 and the second ventilation hole 246 can be defined as the length of a line segment connecting the center of the opening area on the inner surface of the filter section 230 and the center of the opening area on the outer surface of the filter section 230.

[0040] 5, a thin plate-like guide portion 237 is disposed in the annular space 232 downstream of the upstream space 271. The guide portion 237 is provided to change the direction of the swirling flow that has passed through the upstream space 271 obliquely downward and guide the swirling flow from the upstream space 271 to the dust storage space 234. In the following description, the space in which the swirling flow is guided obliquely downward by the guide portion 237 is referred to as a "guide space 243." The guide portion 237 defines the upper end of the guide space 243.

[0041] An upstream end 238 of the guide portion 237 in the flow direction of the swirling flow is located approximately directly above a downstream end 241 of the partition portion 233 in the flow direction of the swirling flow. The swirling flow generated in the upstream space 271 flows into the region between the upstream end 238 of the guide portion 237 and the downstream end 241 of the partition portion 233.

[0042] Guide portion 237 extends in the circumferential direction around filter portion 230 while inclining downward (toward bottom portion 212) from upstream end 238, and is connected to partition portion 233 as shown in Fig. 6. That is, partition portion 233 extends in the circumferential direction from the downstream end of guide portion 237 in the flow direction of the swirling flow. The swirling flow is guided obliquely downward (i.e., toward bottom portion 212) by guide portion 237.

[0043] It should be noted that no swirling flow occurs in the space above the guide portion 237. For this reason, the first ventilation holes 245 are not formed above the guide portion 237, as shown in FIG.

[0044] (Vacuum cleaner in action) When the suction source 111 is activated, the suction force of the suction source 111 acts on the dust on the floor surface through the dust collector 200, the flow path 123 of the suction pipe 120, and the suction nozzle 130. Therefore, the dust on the floor surface flows into the suction nozzle 130 together with the air, and flows through the flow path 123 of the suction pipe 120. Then, the air and dust flow into the dust storage container 210 through the inlet 239 of the dust collector 200.

[0045] Since the inlet 239 opens in the tangential direction of the inner circumferential surface 217 of the peripheral wall portion 211 of the dust storage container 210, the air that flows into the dust storage container 210 from the inlet 239 flows along the inner circumferential surface 217 of the peripheral wall portion 211. Then, this air becomes a swirling flow while flowing through the upstream space 271. Due to the centrifugal force of the swirling flow, dust contained in the swirling flow flows near the inner circumferential surface 217 of the peripheral wall portion 211 of the dust storage container 210 rather than near the filter portion 230, and the amount of dust that is adsorbed to the filter portion 230 is reduced.

[0046] When the swirling flow is flowing through the upstream space 271, the air near the filter unit 230 receives the suction force of the suction source 111 through the first ventilation hole 245. As shown in FIG. 4(a), the first ventilation hole 245 is drilled so that the air flows in a direction that turns back from the direction in which the swirling flow flows, but since the inertial force acting on the air is small, the air can turn back from the direction in which the swirling flow flows and flow into the first ventilation hole 245. That is, the suction force acting on the air through the first ventilation hole 245 overcomes the inertial force of the air, so that the air can pass through the first ventilation hole 245 and flow into the filter unit 230. The air that flows into the filter unit 230 flows out of the dust collector 200 through the through hole 221 formed in the upper cover unit 220.

[0047] When dust is contained in the air flowing into the first ventilation hole 245, the inertial force acting on the dust is greater than the inertial force acting on the air. Therefore, the inertial force acting on the dust is likely to be greater than the suction force acting on the dust through the first ventilation hole 245. In this case, the dust can flow downstream on the swirling flow without being sucked into the first ventilation hole 245. In other words, the dust is less likely to flow into the first ventilation hole 245, and clogging of the first ventilation hole 245 is less likely to occur. Although fine dust may flow into the filter unit 230 through the first ventilation hole 245, such dust is captured by the filter 112 installed on the upper cover unit 220.

[0048] After passing through the upstream space 271, the swirling flow flows into the guide space 243. When the swirling flow reaches the vicinity of the guide portion 237, the guide portion 237 guides the swirling flow toward the bottom portion 212 of the dust storage container 210. Since the guide space 243 communicates with the dust storage space 234, the swirling flow flows from the guide space 243 into the dust storage space 234. At this time, the air in the dust storage space 234 is sucked into the filter portion 230 through the second air hole 246, so the swirling flow can flow into the dust storage space 234 with almost no decrease in flow speed.

[0049] The swirling flow that has flowed into the dust storage space 234 reaches the dust stopper 244 that protrudes downward from the downstream end 241 of the partition part 233. This swirling flow passes over the dust stopper 244 through the gap between the dust stopper 244 and the bottom part 212, but at least a part of the dust contained in the swirling flow is retained in the dust storage space 234 by the dust stopper 244. For this reason, dust is likely to accumulate in the dust storage space 234.

[0050] Some of the dust accumulated in the dust storage space 234 may flow into the downstream side of the dust stopper 244, i.e., into the lower part of the guide space 243, through the gap between the dust stopper 244 and the bottom part 212. In the guide space 243, the air newly flowing into the dust storage container 210 forms a swirling flow diagonally downward by the guide part 237. This prevents the dust that has flowed into the guide space 243 beyond the dust stopper 244 from flowing upward. Therefore, the dust that has flowed into the guide space 243 beyond the dust stopper 244 passes through the guide space 243 and re-flows into the dust storage space 234.

[0051] As described above, the swirling flow flows not only in the space formed at a position higher than the partition portion 233 (upper part of the upstream space 271 and the guide space 243) but also in the space formed at a position lower than the partition portion 233 (lower part of the dust storage space 234 and the guide space 243). Therefore, even in the space formed at a position lower than the partition portion 233, most of the dust flows near the inner circumferential surface 217 of the peripheral wall portion 211 due to the centrifugal force of the swirling flow. At a position lower than the partition portion 233, the filter portion 230 is narrower than at a position higher than the partition portion 233. Therefore, at a position lower than the partition portion 233, the filter portion 230 is relatively far from the inner circumferential surface 217 of the peripheral wall portion 211. Therefore, the inflow of dust into the filter portion 230 through the second ventilation hole 246 is suppressed to some extent.

[0052] Thereafter, when the suction source 111 is stopped, the swirling flow in the dust container 210 disappears, and dust accumulates on the bottom 212. In order to discard the dust in the dust container 210, the user can operate the engaging claw portion 219 to release the engagement between the engaging claw portion 219 and the bottom 212. In this state, when the user applies a downward external force to the bottom 212, the bottom 212 rotates downward around the rotating shaft portion 213, as shown in Fig. 7, and the dust storage space 234 is opened. As a result, the dust accumulated in the dust storage space 234 falls.

[0053] As described above, it is assumed that even after the dust is disposed of, elongated dust (e.g., hair) remains caught in the first ventilation hole 245 and / or the second ventilation hole 246. The first ventilation hole 245 is formed at a position higher than the partition 233 and is away from the opening at the lower end of the dust storage container 210. Therefore, the elongated dust caught in the first ventilation hole 245 is unlikely to hang down below the opening at the lower end of the dust storage container 210. In particular, the partition 233 prevents the elongated dust caught in the first ventilation hole 245 provided on the upper side of the partition 233 from hanging down below the opening at the lower end of the dust storage container 210. In addition, the dust storage container 210 is opaque and the user cannot see the inside of the dust storage container 210, so the elongated dust remaining caught in the first ventilation hole 245 does not give the user a sense of unsanitary.

[0054] On the other hand, the second ventilation hole 246 is formed at a position relatively close to the opening at the bottom end of the dust container 210. Therefore, thin dust particles caught in the second ventilation hole 246 tend to hang down below the opening at the bottom end of the dust container 210. This dust is visible to the user, and may give the user a sense of unsanitary conditions. The user may then wish to remove this dust.

[0055] If the second ventilation hole 246 is formed at an angle like the first ventilation hole 245 in FIG. 4(a), the inflow of dust into the second ventilation hole 246 is suppressed, but the contact area between the elongated dust caught in the second ventilation hole 246 and the filter part 230 is increased. On the other hand, if the second ventilation hole 246 is formed as shown in FIG. 4(b), the axial length of the second ventilation hole 246 is shortened, and the contact area between the elongated dust caught in the second ventilation hole 246 and the filter part 230 can be reduced. With this reduction in the contact area, the force required to pull out the elongated dust from the second ventilation hole 246 is reduced. Therefore, if the user pulls the elongated dust protruding downward from the dust storage container 210 downward, the dust can be easily pulled out from the second ventilation hole 246.

[0056] The thickness of the filter part 230 shown in Fig. 4(a) and Fig. 4(b) is approximately equal in the part where the first ventilation hole 245 is formed and in the part where the second ventilation hole 246 is formed. Alternatively, in order to reduce the contact area between the filter part 230 and the elongated dust caught in the second ventilation hole 246, the thickness of the filter part 230 may be set to a small value in the part where the second ventilation hole 246 is formed, as shown in Fig. 8. That is, in the filter part 230 of Fig. 8, the thickness in the part where the second ventilation hole 246 is formed is smaller than the thickness in the part where the first ventilation hole 245 is formed. In this case, the second ventilation hole 246 may be drilled in the same direction as the first ventilation hole 245. Even if the second ventilation hole 246 is formed obliquely like the first ventilation hole 245, the axial length of the second ventilation hole 246 can be shorter than the axial length of the first ventilation hole 245 by the amount of the reduction in the thickness of the filter portion 230. Furthermore, by forming the second ventilation hole 246 in the same direction as the first ventilation hole 245, a similar effect of suppressing the inflow of dust into the first ventilation hole 245 can be obtained.

[0057] The second air vent 246 shown in Fig. 4(b) is drilled in a substantially horizontal direction. However, since the filter portion 230 has a tapered shape that narrows toward the bottom, the second air vent 246 is drilled at an angle to the outer surface of the filter portion 230 on the vertical cross section of the filter portion 230, as shown in Fig. 9(a). By drilling the second air vent 246 at a right angle to the outer surface of the filter portion 230, as shown in Fig. 9(b), the axial length of the second air vent 246 can be further reduced.

[0058] 9(b) opens obliquely downward on the outer surface of the filter part 230. Therefore, when a user pulls out dust downward, the dust can be pulled out without being rubbed against the filter part 230 excessively strongly.

[0059] The second air vent 246 shown in Fig. 9 opens horizontally or obliquely downward on the outer surface of the filter unit 230. Additionally or alternatively, as shown in Fig. 10, the second air vent 246 opening downward may be provided on the outer surface of the filter unit 230.

[0060] In order to make it possible to smoothly pull out elongated dust particles caught in second vent hole 246, the opening edge of second vent hole 246 on the outer surface side of filter portion 230 may be formed as shown in Fig. 11. The opening edge of second vent hole 246 in Fig. 11 is curved so as to widen as second vent hole 246 approaches the outer surface of filter portion 230.

[0061] The first ventilation hole 245 shown in FIG. 4(a) has a substantially constant size over the axial length of the first ventilation hole 245. Alternatively, the first ventilation hole 245 may be formed as shown in FIG. 12. The first ventilation hole 245 shown in FIG. 12 may be configured with an inner hole portion 248 drilled from the inner surface side of the filter portion 230 and an outer hole portion 249 drilled from the outer surface side of the filter portion 230. Since the outer hole portion 249 is formed at a position shifted in the flow direction of the swirling flow with respect to the inner hole portion 248, the air flowing near the outer surface of the filter portion 230 can be sucked in the direction of the dotted arrow in FIG. 12. The axial length of the first ventilation hole 245 shown in FIG. 12 may be defined as the length of a line segment connecting the center of the opening area of ​​the inner hole portion 248 on the inner surface of the filter portion 230 and the center of the opening area of ​​the outer hole portion 249 on the outer surface of the filter portion 230. The second ventilation hole 246 is formed so that the axial length of the second ventilation hole 246 is shorter than the length of this line segment.

[0062] In this embodiment, a plurality of first ventilation holes 245 and a plurality of second ventilation holes 246 are formed in the filter portion 230. Alternatively, if the suction capacity of the suction source 111 is high enough to generate a swirling flow in the upstream space 271 and allow the swirling flow to flow into the dust storage space 234, a single first ventilation hole 245 and a single second ventilation hole 246 may be formed in the filter portion 230.

[0063] <Second embodiment> In order to enable a user to discharge dust from the dust collecting device 200 without touching the dust, a collecting device 400 shown in Fig. 13 may be used. The collecting device 400 is configured so that the vacuum cleaner 100 can be attached thereto, and the collecting device 400 supports the dust collecting device 200 in a state in which the vacuum cleaner 100 is attached to the collecting device 400. The collecting device 400 and the dust collecting device 200 constitute a cleaning tool set 500.

[0064] (Overall structure of the recovery device) The collection device 400 has a support plate 410 that is substantially rectangular in plan view, a housing 420 provided on the support plate 410, a cylindrical support portion 430 that extends upward from the upper surface of the housing 420, and a tube holder 440 provided on the front portion of the support portion 430. The upper end of the support portion 430 is configured so that the dust storage container 210 of the dust collection device 200 can be attached, and the support portion 430 supports the dust storage container 210 during the collection operation of dust from the dust collection device 200 to the collection device 400. In addition, the support portion 430 has a flow path 431 that extends in the vertical direction so as to allow dust discharged from the opening at the lower end of the dust storage container 210 to fall, as shown in FIG.

[0065] 15, the tube holding part 440 is formed with a holding groove 441 that opens forward and extends in the vertical direction. The holding groove 441 has a shape complementary to the rear part of the base end tube part 121 of the vacuum cleaner 100. The provision of the tube holding part 440 encourages the user to place the suction tube 120 of the vacuum cleaner 100 in front of the housing 420 and the support part 430 of the collection device 400 and fit the base end tube part 121 into the holding groove 441. In other words, the user is encouraged to attach the vacuum cleaner 100 to the collection device 400 in a predetermined orientation.

[0066] Inside the housing 420, there are arranged a collection source 421 which generates a suction force for sucking dust out of the dust container 210 of the vacuum cleaner 100, and a collection section 422 which stores the dust sucked out of the dust container 210. The collection section 422 is arranged above the collection source 421, and a filter 423 which allows air to pass while capturing dust is arranged between the collection section 422 and the collection source 421. The collection source 421 is connected to the collection section 422 via the filter 423.

[0067] The recovery source 421 and the recovery section 422 are disposed in the housing 420 at a rear position relative to the support section 430. A connection tube 424 is provided extending forward from the front surface of the recovery section 422 in a substantially horizontal position to communicate the internal space of the recovery section 422 with the flow path 431 of the support section 430. While the support section 430 is provided extending in the vertical direction, the connection tube 424 is provided in a substantially horizontal position, so that a connection portion 425 between the support section 430 and the connection tube 424 has a bent shape. The axial length of the connection tube 424 is shorter than the axial length of the support section 430, preventing the housing 420 from becoming larger in the front-rear direction.

[0068] 3 and is not engaged with bottom 212, collection source 421 is configured to generate a downward dust suction force large enough to tilt bottom 212 downward against the biasing force of torsion spring 214. Collection source 421 is configured to suck out dust within dust storage container 210 while maintaining the attitude of bottom 212 tilted downward. Collection source 421 can be configured, for example, by a motor that generates a rotational force and a rotating blade configured to generate a downward airflow when rotated by the motor.

[0069] The support part 430 has an outer cylinder 432 extending in the vertical direction, and an inner cylinder 433 extending in the vertical direction within the outer cylinder 432 so as to form the above-mentioned flow path 431. The inner cylinder 433 is disposed so that the upper end of the inner cylinder 433 is located lower than the upper end of the outer cylinder 432. In detail, the inner cylinder 433 is provided within the outer cylinder 432 so that a tilting space 434 that allows the bottom part 212 to tilt downward is formed between the upper end of the inner cylinder 433 and the upper end of the outer cylinder 432. The lower end part of the dust storage container 210 is fitted into the upper end part of the tilting space 434 as shown in FIG.

[0070] The outer cylinder 432 has a step 435 at a position facing the engaging claw 219 of the dust container 210 fitted in the tilting space 434, and a thin plate-like release portion 436 stands upward from the step 435. This release portion 436 is configured to come into contact with the engaging claw 219 and displace the engaging claw 219 in the direction of the arrow in Fig. 3 when the user fits the lower end portion of the dust container 210 into the tilting space 434 while holding the suction tube 120 in the tube holding portion 440. As a result, the engaging claw 219 changes from the position shown in Fig. 3 to the position shown in Fig. 16, and the engagement between the engaging claw 219 and the bottom 212 is released.

[0071] (Operation of recovery device) After the user finishes the cleaning work, the user attaches the vacuum cleaner 100 to the collection device 400. That is, the user places the suction tube 120 of the vacuum cleaner 100 in front of the housing 420 and the support part 430 of the collection device 400. In this state, the user fits the base end tube part 121 of the suction tube 120 into the holding groove 441 of the tube holding part 440, and fits the lower end part of the dust storage container 210 into the upper end part of the support part 430. When the user presses the lower end part of the dust storage container 210 down into the tilting space 434 at the upper end part of the support part 430, the release part 436 comes into contact with the engaging claw part 219, and the engaging claw part 219 takes the position shown in FIG. 16. As a result, the engagement between the engaging claw part 219 and the bottom part 212 is released. In this state, the bottom 212 of the dust container 210 is held by the torsion spring 214 in a position that closes the opening at the lower end of the peripheral wall 211 .

[0072] Thereafter, when the collection source 421 is operated, the dust suction force of the collection source 421 acts on the bottom 212 of the dust storage container 210 through the collection portion 422, the connecting tube 424, and the support portion 430. The bottom portion 212 tilts downward against the biasing force of the torsion spring 214 due to the dust suction force of the collection source 421, and the opening at the lower end of the dust storage container 210 is opened. The dust suction force of the collection source 421 sucks out dust from the dust storage container 210 while maintaining this state. The dust flows into the collection portion 422 through the support portion 430 and the connecting tube 424, and is accumulated in the collection portion 422.

[0073] When elongated dust particles are caught in the second air hole 246 of the filter unit 230 as shown in Fig. 7, the suction force of the collection source 421 acts to pull the elongated dust particles downward. Since the axial length of the second air hole 246 is relatively short, the frictional force acting on the elongated dust particles when they are pulled out is small. Therefore, the suction force of the collection source 421 allows the dust particles to be easily pulled downward from the second air hole 246.

[0074] <Third embodiment> In the dust collecting device 200 of the first embodiment, the partitioning portion 233 divides a part of the annular space 232 into upper and lower spaces. Alternatively, the partitioning portion 233 may divide the entire circumference of the annular space 232 into upper and lower spaces, as shown in Fig. 17. In this case, the guide portion 237 and the dust stopper 244 may be omitted from the dust collecting device 200.

[0075] 17 is provided at the same height as the partition 233 of the first embodiment. The space below the partition 233 is used to store dust, as in the first embodiment, and is also referred to as a "dust storage space 234" in the following description. On the other hand, the space above the partition 233 is used to centrifuge the dust, and is also referred to as a "separation space 272" in the following description.

[0076] 17 is smaller than the inner diameter of the peripheral wall portion 211, and an annular gap 247 is formed between the outer edge of the partition portion 233 and the inner peripheral surface of the peripheral wall portion 211. This annular gap 247 is provided to allow dust separated by centrifugal force in the separation space 272 to fall into the dust storage space 234 by gravity.

[0077] The dust collecting device 200 shown in FIG. 17 can be attached to the vacuum cleaner 100 shown in FIG. 1. When the suction source 111 shown in FIG. 1 is operated, air containing dust flows into the separation space 272 through the inlet 239. Then, this air becomes a swirling flow flowing through the separation space 272. Due to the centrifugal force of the swirling flow, the dust contained in this air is centrifuged and flows near the inner circumferential surface 217 of the peripheral wall portion 211. This dust rides on the swirling flow and circles inside the dust storage container 210, and gradually descends due to the action of gravity. Then, this dust falls into the dust storage space 234 through the annular gap 247. At this time, the air in the dust storage space 234 is sucked into the filter portion 230 through the second air hole 246, so that a part of the air in the separation space 272 can flow into the dust storage space 234 through the annular gap 247. The flow of air from the separation space 272 to the dust storage space 234 through the annular gap 247 further promotes the inflow of dust into the dust storage space 234 .

[0078] The dust storage space 234 is separated from the separation space 272 by the partition 233 over the entire circumference, and the swirling flow in this dust storage space 234 is not as strong as that in the dust storage space 234 of the first embodiment. Therefore, the centrifugal force acting on the dust that has fallen into the dust storage space 234 is small, and the dust is attracted to the filter part 230 together with the air flowing into the second ventilation hole 246. As a result, the dust in the dust storage space 234 is in a state of being adsorbed to the filter part 230. In other words, the dust is pressed against the filter part 230 and compressed. At this time, elongated dust may be caught in the second ventilation hole 246, but since the axial length of the second ventilation hole 246 is relatively short, the frictional force acting on the dust is small. Therefore, the dust can be easily pulled out from the second ventilation hole 246.

[0079] In the third embodiment, the second ventilation hole 246 may have various shapes. That is, the shapes shown in Fig. 4(b), Fig. 9(b) and Fig. 11 can be adopted for the second ventilation hole 246. Also, the shapes shown in Fig. 4(a) and Fig. 12 may be adopted for the first ventilation hole 245.

[0080] In the third embodiment, the second ventilation holes 246 may also be formed so that the opening direction of the second ventilation holes 246 on the outer surface of the filter portion 230 faces obliquely downward or downward.

[0081] In the third embodiment as well, the thickness of the filter portion 230 may be smaller in the portion where the second air holes 246 are formed than in the portion where the first air holes 245 are formed.

[0082] The dust collected in the dust collecting device 200 of the third embodiment may be disposed of by the user himself / herself, or the recovery device 400 of the second embodiment may be used to dispose of this dust.

[0083] In the third embodiment, a plurality of first ventilation holes 245 and a plurality of second ventilation holes 246 are formed in the filter portion 230. Alternatively, if the suction source 111 has a high suction capacity, a single first ventilation hole 245 and a single second ventilation hole 246 may be formed in the filter portion 230. If the suction source 111 has a high suction capacity, a swirling flow can be generated in the separation space 272 and dust can be compressed in the dust storage space 234.

[0084] In the first to third embodiments, the bottom 212 of the dust storage container 210 is rotatable downward around the rotation shaft 213. Alternatively, the bottom 212 may be configured to be removable from the peripheral wall 211 of the dust storage container 210. In this case, when a user separates the bottom 212 from the peripheral wall 211, the dust storage space 234 is opened and the dust in the dust storage space 234 can be discarded.

[0085] In the first to third embodiments, the filter portion 230 has a tapered tubular shape that narrows toward the bottom. Alternatively, the filter portion 230 may have a cylindrical shape having a substantially constant diameter over the entire axial length of the filter portion 230.

[0086] The dust collecting device 200 of the first to third embodiments has a partition 233. Alternatively, the partition 233 may be omitted. In this case, the first ventilation hole 245 is formed at a position high enough that even if long and thin dust particles are caught, the dust particles do not protrude from the opening at the lower end of the dust storage container 210. Then, the second ventilation hole 246 is formed at a position lower than this height position.

[0087] In the first to third embodiments, the vacuum cleaner 100 is a stick type. Alternatively, the vacuum cleaner 100 may be a self-propelled vacuum cleaner (a so-called robot vacuum cleaner), a canister type vacuum cleaner, or a handheld type vacuum cleaner.

[0088] (Effects, etc.) The technology according to the above-described embodiment has the following features and provides the following effects.

[0089] The dust collecting device according to one aspect of the above-mentioned embodiment is attached to a vacuum cleaner having a suction source that generates a suction force for sucking dust. The dust collecting device includes a dust storage container having an inlet through which dust-containing air flows by the suction force of the suction source, and configured so that the air flowing in through the inlet becomes a swirling flow, and a filter unit that is accommodated in the dust storage container so as to form an annular space through which the swirling flow flows between the dust storage container and a peripheral wall part, and captures dust while sucking in the air in the annular space by the suction force of the suction source. The dust storage container has a bottom part that opens and closes an opening at the lower end of the dust storage container. The filter unit is formed with a first air hole that is obliquely drilled with respect to the outer surface of the filter unit so as to suck in air in a direction that turns back from the direction in which the swirling flow flows, and a second air hole that is provided at a position closer to the bottom than the first air hole. The axial length of the second air hole is shorter than that of the first air hole.

[0090] In the above-mentioned configuration, when the suction source is activated, air containing dust flows into the dust container through the inlet. This air becomes a swirling flow that flows through the annular space formed between the peripheral wall of the dust container and the filter. At this time, the dust contained in the swirling flow flows near the peripheral wall of the dust container rather than near the filter due to the centrifugal force of the swirling flow. This prevents the first and second air holes from being clogged with dust.

[0091] In order to further prevent the first vent from being clogged with dust, in the above-mentioned configuration, the first vent is configured to draw air in a direction that turns back from the direction of the swirling flow. In this case, a larger inertial force than air acts on the dust flowing with the swirling flow, so even if air is drawn into the first vent, the dust can flow downstream without being drawn into the first vent.

[0092] If the first vent hole is provided in the filter section at a position close to the bottom of the dust container, the lower part of the filter section can be prevented from becoming clogged with dust, but the following problem may occur. That is, if thin and long dust particles such as hair get caught in the first vent hole near the bottom, when the bottom opens the opening at the lower end of the dust container, the dust particles may hang down through the opening to the bottom of the dust container. It is expected that a user would like to remove the thin and long dust particles that protrude from the dust container, but it is difficult to remove the dust particles for the following reasons.

[0093] That is, the first ventilation hole is formed obliquely with respect to the outer surface of the filter unit so as to suck in air in a direction that turns back from the direction of the swirling flow, and the axial length of the first ventilation hole is long. If elongated dust particles are caught in such a first ventilation hole, the contact area between the dust particles and the filter unit becomes large. As a result, the force required to pull out the elongated dust particles from the first ventilation hole becomes large. To solve this problem, in the above-mentioned configuration, a second ventilation hole having an axial length shorter than that of the first ventilation hole is provided at a position relatively close to the bottom. Even if elongated dust particles are caught in the second ventilation hole, the axial length of the second ventilation hole is short, so that the contact area between the dust particles and the filter unit does not become excessively large. Therefore, the force required to pull out the elongated dust particles caught in the second ventilation hole does not become too large, and the user can easily pull out the dust particles from the second ventilation hole.

[0094] In the above-described configuration, the filter portion may have a shape that narrows downward.

[0095] In the above-mentioned configuration, the filter portion has a shape that narrows toward the bottom, so that the distance from the peripheral wall of the dust container to the filter portion increases toward the bottom, which prevents dust flowing near the peripheral wall of the dust container from entering the second air hole formed at a relatively low position.

[0096] In the above-described configuration, the dust collecting device may further include a partition portion provided at a position lower than the inlet so as to divide a portion of the annular space into upper and lower portions, a guide portion that guides the swirling flow that has passed through the upstream space which is the space above the partition portion and communicates with the inlet, to the dust storage space which is the space below the partition portion, and a dust stopper that retains the dust that has flowed into the dust storage space while allowing the air that has flowed into the dust storage space to escape from the dust storage space.

[0097] In the above-described configuration, the air flowing in through the inlet becomes a swirling flow and passes through the upstream space, which is the space above the partition. Then, this swirling flow is guided by the guide to flow into the dust storage space, which is the space below the partition. The air that flows into the dust storage space can flow downstream past the dust stopper, but the dust contained in this air is retained in the dust storage space by the dust stopper. As a result, the dust accumulates in the dust storage space. Because the dust storage space is separated from the upstream space by the partition, the dust accumulated in the dust storage space is prevented from flying up into the upstream space.

[0098] In the above-described configuration, the second air hole may be open toward the dust storage space below the partition.

[0099] In the above-described configuration, the second air vent opens toward the dust storage space below the partition, so that even if a long, thin dust particle gets caught in the second air vent, the dust particle can be pulled downward without being hindered by the partition.

[0100] In the above-mentioned configuration, the dust collecting device may further include a partition provided at a position lower than the inlet so as to divide the annular space into upper and lower spaces. The partition may be radially spaced from the peripheral wall of the dust storage container so as to allow dust contained in the swirling flow to fall by gravity into the dust storage space, which is the space below the partition.

[0101] In the above-described configuration, the air flowing into the dust container through the inlet becomes a swirling flow that flows through the space above the partition. The dust contained in this swirling flow flows near the peripheral wall of the dust container rather than near the filter section due to the centrifugal force of the swirling flow. Since the partition is radially spaced from the peripheral wall of the dust container, the dust flowing near the peripheral wall of the dust container falls by gravity through the gap between the peripheral wall of the dust container and the partition into the dust storage space below the partition. As a result, the dust is accumulated in the dust storage space.

[0102] In the above-described configuration, the second air hole may be open toward the dust storage space below the partition.

[0103] In the above-mentioned configuration, the air in the dust storage space is sucked in through the second vent hole, which encourages the dust in the space above the partition to flow into the dust storage space through the space between the partition and the peripheral wall. At this time, since the dust storage space is separated from the space above the partition by the partition, the swirling flow above the partition can be prevented from flowing into the dust storage space. In this state, when the air in the dust storage space is sucked into the second vent hole by the suction force of the suction source, the dust in the dust storage space can be attracted to the filter section and adsorbed to the outer surface of the filter section. At this time, the elongated dust can be caught in the second vent hole, but since the axial length of the second vent hole is short, the contact area between the dust and the filter section is small. Therefore, the force required to pull out the dust is reduced, and the user can easily pull out the elongated dust.

[0104] In the above-described configuration, the first air hole may be formed on an upper side of the partition.

[0105] In the above-described configuration, even if thin dust particles become caught in the first ventilation hole, the partition portion is provided below the first ventilation hole, so that the thin dust particles are unlikely to hang down beyond the partition portion.

[0106] In the above-described configuration, the filter portion may have a shape that narrows downward.

[0107] In the above-described configuration, the filter portion has a shape that narrows toward the bottom, so that the dust storage space below the partition portion is wide, and therefore a large amount of dust can be stored in the dust storage space.

[0108] A vacuum cleaner according to another aspect of the above-described embodiment may include a suction source that generates a suction force for sucking in dust, the above-described dust collecting device, and a suction pipe that forms a flow path through which air containing dust flows by the suction force of the suction source. The flow path of the suction pipe may be in communication with an inlet of the dust collecting device.

[0109] In the above-described configuration, when the suction source is activated, air containing dust flows through the flow path of the suction pipe, and then flows into the dust collector through the inlet of the dust collector.

[0110] A collection device according to another aspect of the above-described embodiment may include a support portion configured to support the above-described dust collecting device, and a collection source that applies a downward suction force to the bottom of a dust storage container of the dust collecting device supported by the support portion to open the opening of the dust storage container and suck out dust from within the dust storage container.

[0111] In the above-mentioned configuration, the collection source applies a downward suction force to the bottom of the dust container to open the opening of the dust container. In this state, the dust in the dust container is sucked downward by the suction force of the collection source. At this time, since the axial length of the second air hole is relatively short, the frictional force acting on the elongated dust caught in the second air hole when pulling out the dust is small. Therefore, the dust can be pulled downward from the second air hole by the suction force of the collection source.

[0112] A cleaning tool set according to another aspect of the above-described embodiment may include the above-described dust collecting device and a recovery device that recovers dust from the dust collecting device. The recovery device may have a support portion configured to be able to support the dust collecting device, and a recovery source that applies a downward suction force to a bottom of a dust storage container of the dust collecting device supported by the support portion to open an opening of the dust storage container and suck out dust from the dust storage container. [Industrial Applicability]

[0113] The techniques of the above-described embodiments are suitably used in devices used for cleaning work. [Explanation of symbols]

[0114] 100...Vacuum cleaner 111...Suction source 120...Suction tube 123... Flow path 200 Dust collection device 210...Dust storage container 211...Peripheral wall part 212...Bottom 230 Filter section 232 Annular space 233... Partition 234...Dust storage space 237... Information Department 239...Inlet 244 Dust stopper 245... First ventilation hole 246...Second ventilation hole 271...Upstream space 400 Recovery device 421...Recovery Source 430...Support part 431... Flow path 500······Cleaning tool set

Claims

1. A dust collecting device attached to a vacuum cleaner having a suction source that generates a suction force for sucking in dust, a dust storage container having an inlet through which dust-containing air flows in by the suction force of the suction source, and configured so that the air flowing in through the inlet becomes a swirling flow; a filter section that is accommodated in the dust storage container so as to form an annular space through which the swirling flow flows between itself and a peripheral wall section of the dust storage container, and that captures dust while sucking in air in the annular space by the suction force of the suction source, The dust container has a bottom portion that opens and closes an opening at a lower end of the dust container, The filter portion is formed with a first air vent hole obliquely formed with respect to an outer surface of the filter portion so as to draw in air in a direction turning back from a direction in which the swirling flow flows, and a second air vent hole provided at a position closer to the bottom than the first air vent hole, A dust collecting device, wherein an axial length of the second vent hole is shorter than an axial length of the first vent hole.

2. The dust collecting device according to claim 1 , wherein the filter portion has a shape that narrows downward.

3. A partition portion provided at a position lower than the inlet so as to partition a part of the annular space into upper and lower portions; a guide portion that guides the swirling flow that has passed through an upstream space that is a space above the partition portion and communicates with the inlet to a dust storage space that is a space below the partition portion; The dust collecting device according to claim 1 , further comprising a dust stopper that stops the dust that has flowed into the dust storage space while allowing air that has flowed into the dust storage space to escape from the dust storage space.

4. The dust collecting device according to claim 3 , wherein the second air hole is open toward the dust storage space below the partition.

5. The annular space is divided into upper and lower portions, and a partition portion is provided at a position lower than the inlet. The dust collecting device according to claim 1 , wherein the partition portion is radially spaced from the peripheral wall portion of the dust storage container so as to allow dust contained in the swirling flow to fall by gravity into a dust storage space, which is the space below the partition portion.

6. The dust collecting device according to claim 5 , wherein the second air hole is open toward the dust storage space below the partition.

7. The dust collecting device according to claim 3 or 4, wherein the first air hole is formed on an upper side of the partition portion.

8. The dust collecting device according to claim 3 , wherein the filter portion has a shape that narrows downward.

9. A suction source that generates a suction force for sucking in dust; A dust collecting device according to any one of claims 1 to 6, a suction pipe forming a flow path through which air containing dust flows by the suction force of the suction source, A vacuum cleaner, wherein the flow path of the suction pipe is in communication with the inlet of the dust collecting device.

10. A support portion configured to support the dust collecting device according to any one of claims 1 to 6; a collection source that applies a downward suction force to the bottom of the dust storage container of the dust collecting device supported by the support part to open the opening of the dust storage container and suck out the dust inside the dust storage container.

11. A dust collecting device according to any one of claims 1 to 6, A collection device that collects dust from the dust collecting device, The recovery device includes: A support portion configured to be able to support the dust collecting device; and a collection source that applies a downward suction force to the bottom of the dust container of the dust collecting device supported by the support part to open the opening of the dust container and suck out the dust inside the dust container.

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