CN110604510B - Dust collecting device and electric dust collector - Google Patents
Dust collecting device and electric dust collector Download PDFInfo
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- CN110604510B CN110604510B CN201910417339.4A CN201910417339A CN110604510B CN 110604510 B CN110604510 B CN 110604510B CN 201910417339 A CN201910417339 A CN 201910417339A CN 110604510 B CN110604510 B CN 110604510B
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- dust
- dust collecting
- cup
- separating
- collecting device
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1608—Cyclonic chamber constructions
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1683—Dust collecting chambers; Dust collecting receptacles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
- Cyclones (AREA)
Abstract
The invention provides a dust collecting device (6) capable of inhibiting the backflow of dust collected in a first dust collecting part (12) and an electric dust collector with the dust collecting device (6). The dust collection device (6) is provided with: a first separation unit (11) for centrifugally separating dust; and a first dust collecting unit (12) that collects the dust separated by the first separating unit (11). The dust collecting device (6) has a cylindrical cup part (20), a cylindrical expansion part (33), a ventilation part (35), and a reverse flow resistance part (37). The cup (20) is introduced with air containing dust. The expansion part (33) is disposed inside the cup part (20) and is provided at a position between the first separation part (11) and the first dust collection part (12). The ventilation section (35) is formed on the first separating section (11) side of the expansion section (33) and is capable of ventilating air from the first dust collecting section (12) side to the first separating section (11) side. The reverse flow preventing part (37) is positioned between the expanding part (33) and the cup part (20) and prevents the dust of the first dust collecting part (12) from reversely flowing to the first separating part (11).
Description
The present application is based on Japanese patent application 2018-113798 (application date: 2018/06/14), from which it enjoys preferential benefits. This application incorporates by reference the entirety of this application.
Technical Field
Embodiments of the present invention relate to a dust collecting device in which dust is centrifugally separated by a separating portion and collected in a dust collecting portion, and an electric vacuum cleaner including the dust collecting device.
Background
Conventionally, as a dust collecting device used in an electric vacuum cleaner, a dust cup for centrifugally separating dust from dust-containing air is known. The dust collecting cup is provided with an inner cylinder for generating a swirling airflow inside a bottomed cylindrical cup part, and dust centrifugally separated by the swirling airflow generated around the inner cylinder is compressed by a wing protruding from the inner cylinder and collected at the bottom of the cup part. In such a dust collecting cup, it is desirable to prevent the dust collected in the dust collecting part from being lifted and flowing backward.
Disclosure of Invention
The present invention addresses the problem of providing a dust collecting device that can suppress backflow of dust collected in a dust collecting unit, and an electric vacuum cleaner equipped with the dust collecting device.
The dust collecting device of the embodiment comprises a separating part for centrifugally separating dust and a dust collecting part for collecting the dust separated by the separating part. The dust collecting device has a cylindrical cup, a cylindrical insertion member, a ventilation portion, and a reverse flow resistance portion. The cup portion is introduced with dust-laden air. The inner insertion member is disposed inside the cup portion and is disposed between the separation portion and the dust collection portion. The ventilation part is formed on the separating part side of the inserting part and can ventilate from the dust collecting part side to the separating part side. The reverse flow preventing part is located between the inner inserting part and the cup part and prevents the dust in the dust collecting part from flowing back to the separating part.
According to the above configuration, the backflow of dust collected in the dust collecting unit can be suppressed.
Drawings
Fig. 1 is a sectional view showing a dust collecting device according to a first embodiment.
Fig. 2A is a perspective view of the dust collecting device.
Fig. 2B is a side view of the interposer.
Fig. 3 is a perspective view showing the dust collecting device from one side.
Fig. 4 is a perspective view showing the dust collecting device from the other side.
Fig. 5 is a perspective view showing an electric vacuum cleaner provided with the dust collecting device.
Fig. 6 is a side view of an insertion member of the dust collecting device of the second embodiment.
Fig. 7 is a perspective view of an insertion member of the dust collecting device of the third embodiment.
Fig. 8A is a sectional view showing an example of a part of a dust collecting device according to a fourth embodiment.
Fig. 8B is a sectional view showing another example of a part of the dust collecting device.
Fig. 9 is a sectional view showing a part of a dust collecting device of a fifth embodiment.
Detailed Description
(first embodiment)
Hereinafter, a first embodiment will be described with reference to the drawings.
In fig. 5, 1 denotes an electric vacuum cleaner. In the present embodiment, the electric vacuum cleaner 1 is moved by a user while traveling on a floor surface, and cleans the floor surface from which dust on the floor surface is to be cleaned. In the present embodiment, a horizontal type vacuum cleaner is exemplified as the vacuum cleaner 1, but a vertical type (Upright type), a Stick type (Stick type), a hand-held type (hand type), an autonomous traveling type cleaning robot, or the like may be used.
The electric vacuum cleaner 1 includes a cleaner main body 2. In the present embodiment, an air passage body 3 forming a suction air passage is detachably connected to the cleaner body 2. The air passage body 3 includes a flexible tube body, an extension tube, and a suction port body. The air duct body 3 is provided with an operation portion for a user to perform a gripping operation. A setting means for setting the start and stop of the electric vacuum cleaner 1 is disposed in the operation portion. In addition, the air duct body 3 may be configured to correspond to each mode when the electric vacuum cleaner 1 is of a vertical type, a stick type, or a hand-held type, and is not necessary when the electric vacuum cleaner 1 is a sweeping robot.
A suction port 4 is formed in the cleaner body 2. In the present embodiment, the air passage body 3 is connected to the air inlet 4. Further, an electric blower 5 serving as a suction source is disposed in the cleaner body 2. Further, a dust collector 6 for collecting dust sucked by the electric blower 5 is disposed in the cleaner body 2. Further, a support portion 7 for supporting the dust collecting device 6 is formed in the cleaner main body 2.
The dust collecting device 6 shown in fig. 1, 3, and 4 is a cyclone type dust collecting device that whirls air containing dust to centrifugally separate and collect the dust. The dust collecting device 6 includes an inlet 10 communicating with the inlet 4 to introduce the dust-containing air, a first separating part 11 as a separating part for centrifugally separating dust from the dust-containing air introduced through the inlet 10, and a first dust collecting part 12 as a dust collecting part for collecting the dust separated by the first separating part 11 as an air passage and dust collection. In the present embodiment, the dust collecting device 6 further includes an air duct 13 for guiding the dust-containing air discharged from the first separating part 11, a second separating part 14 for separating dust not separated by the first separating part 11 from the dust-containing air introduced from the air duct 13, a second dust collecting part 15 as a dust collecting part for collecting the dust separated by the second separating part 14, an exhaust air duct 16 for guiding the air discharged from the second separating part 14, and an exhaust port 17 for discharging the air from which the dust is separated to the suction side of the cleaner body 2. The dust collecting device 6 is detachably locked to the cleaner body 2 by a detachable mechanism 18 (fig. 5). In the present embodiment, since the dust collecting device 6 is not provided with electronic components or the like, separable components can be disassembled and washed with water.
The first separation section 11 is mainly a section for centrifugally separating coarse dust in the present embodiment. The second separation part 14 is a part for centrifugally separating fine dust and fine dust, and a plurality of parts are provided in the present embodiment. Therefore, in the present embodiment, the first dust collecting part 12 mainly collects coarse dust, and the second dust collecting part 15 is configured to collect fine dust.
The dust collecting device 6 is structurally provided with a cup 20 and a separating body 21.
The cup 20 is formed in a bottomed cylindrical shape. Further, the cup 20 is formed with an introduction port 10. In the cup 20 of the present embodiment, the introduction port 10 is located in the front portion of the cup 20, but the present invention is not limited to this arrangement.
The cup portion 20 includes a bottomed cylindrical cup body portion 23. Inside the cup body 23, a first dust collecting part 12 is formed on one side in the longitudinal direction of the dust collecting device 6, i.e., the lower side in fig. 1, and a first separating part 11 is formed on the other side in the longitudinal direction of the dust collecting device 6, i.e., the upper side in fig. 1. The cup 20 is provided with an enlarged cup 24. The enlarged cup portion 24 is formed to have a diameter larger than that of the cup body portion 23 on the upper side of the cup body portion 23. Further, a second dust collecting part 15 is formed inside the enlarged cup part 24.
The separate body 21 shown in fig. 1, 3, and 4 is attachable to and detachable from the cup 20. In the present embodiment, the dust collected in the first dust collector 12 and the second dust collector 15 can be discharged from the cup 20 in a state where the separating body 21 is removed from the cup 20. In the present embodiment, the separator 21 includes the dividing unit 26. The dividing portion 26 is the following portion: is inserted into the cup part 20, closes the other side in the longitudinal direction of the cup part 20, and separates the inside of the cup part 20 into a first separating part 11 and a first dust collecting part 12, which are acted by negative pressure generated by driving of the electric blower 5 to swirl dust-containing air, and a second dust collecting part 15, which is not acted by negative pressure and does not pass dust-containing air. A sealing member 27 pressed against the cup 20 may be attached to the partition 26.
The separator 21 includes a structural portion 28. The structural portion 28 is a portion that is inserted into the cup portion 20 and constitutes the first separated portion 11 together with the cup body portion 23 of the cup portion 20. The formation 28 is disposed coaxially or substantially coaxially with respect to the cup portion 20. Further, a swirling flow of the dust-containing air introduced from the introduction port 10 is formed between the structural portion 28 and the inner circumferential surface of the cup portion 20. The structure portion 28 includes an exhaust pipe 30 which is a cylindrical pipe portion serving as a turning center of the swirling air flow of the first separating portion 11 and discharging air from the first separating portion 11. The exhaust pipe 30 is formed in a cylindrical shape. Further, the exhaust duct 30 is located inside the dividing portion 26. One longitudinal side of the exhaust pipe 30 protrudes from the partition 26 at a position corresponding to the cup body 23 of the cup 20, and is inserted into the cup body 23 of the cup 20. The exhaust pipe 30 forms the first separating portion 11 with the cup body 23. Further, the exhaust cylinder 30 is provided with a vent hole 31. The vent hole 31 communicates with the air duct 13. The vent hole 31 may also be covered by a filter.
The structure portion 28 includes a cylindrical enlarged portion 33 as an insertion member. The expansion part 33 is provided between the first separating part 11 and the first dust collecting part 12. The expansion portion 33 is located on the first dust collection unit 12 side, which is one side in the longitudinal direction of the exhaust cylinder 30. The enlarged portion 33 may be detachable from the exhaust pipe 30, or may be formed integrally with the exhaust pipe 30. The enlarged portion 33 of the present embodiment is located in the cup body 23 and is spaced apart from the bottom. The enlarged portion 33 is formed to be enlarged outward from the exhaust pipe 30. The enlarged portion 33 is disposed coaxially or substantially coaxially with the exhaust pipe 30. The enlarged portion 33 is formed in a cylindrical shape with a lid, which is open on the first dust collecting part 12 side, i.e., on the side facing the bottom of the cup 20. Further, a ventilation portion 35 is opened at an upper end portion of the enlarged portion 33 on the first separated portion 11 side. The ventilation portion 35 allows a part of the swirling air flow swirling toward the first dust collection portion 12 to pass from the inside of the expansion portion 33 to the outside, thereby compressing the dust collected in the first dust collection portion 12 into the inside of the expansion portion 33. The ventilation portion 35 is disposed on the outer peripheral side and the inner peripheral side of the exhaust pipe 30 in the present embodiment, but may be disposed only on the outer peripheral side of the exhaust pipe 30 or only on the inner peripheral side of the exhaust pipe 30. The ventilation portion 35 located on the outer peripheral side of the exhaust stack 30 can ventilate from the first dust collection portion 12 side to the first separation portion 11 side. The ventilation portion 35 located on the inner peripheral side of the exhaust duct 30 can ventilate the air passage portion 13 from the first dust collector 12 side. The ventilation portion 35 may be separately covered with the filter 36, or may be formed with a small opening to function as a filter by itself.
Further, a reverse flow preventing portion 37 is disposed between the enlarged portion 33 and the cup portion 20. The reverse flow preventing part 37 prevents the dust in the first dust collecting part 12 from flowing backward toward the first separating part 11. In the present embodiment, the reverse flow preventing portion 37 is provided to protrude from the enlarged portion 33 toward the cup portion 20 in a fin shape, but the shape is not limited to the illustrated example. The reverse flow preventing portion 37 may be disposed between the enlarged portion 33 and the cup 20, or may be provided to protrude from the inner circumferential surface of the cup 20 toward the enlarged portion 33. The backflow prevention unit 37 is formed in a spiral shape along the swirling flow around the expansion portion 33. The backflow prevention unit 37 of the present embodiment is formed in a spiral shape along the swirling air flow from the first separation unit 11 side toward the first dust collection unit 12 side. The backflow prevention portion 37 is formed between the enlarged portion 33 and the cup portion 20 along the radial direction of the enlarged portion 33. The backflow prevention portion 37 of the present embodiment is set such that a portion facing the inner peripheral surface of the cup portion 20 on the distal end side is located close to the inner peripheral surface of the cup portion 20, and a gap with respect to the inner peripheral surface of the cup portion 20 is not more than a predetermined value. Further, a portion of the reverse flow preventing portion 37 facing the inner peripheral surface of the cup 20 on the distal end side may be positioned in contact with the inner peripheral surface of the cup 20. In the present embodiment, the backflow prevention unit 37 is integrally and continuously formed. The backflow prevention portion 37 is formed continuously for one or more revolutions in the present embodiment, but is not limited thereto, and may be formed partially between the enlarged portion 33 and the cup portion 20 along the radial direction of the enlarged portion 33. The backflow prevention section 37 of the present embodiment has one circumferential end disposed near the inlet 10, and the other circumferential end is offset from the one circumferential end toward the first dust collection section 12 and disposed near the inlet 10. The reverse flow preventing portion 37 may be formed to have a constant or substantially constant width between both end portions in the circumferential direction, and may be formed to have a width that varies at any position.
The separator 21 includes a separation body 40. A portion of the separate body portion 40 is located inside the enlarged cup portion 24 of the cup portion 20, and the remaining portion is located outside the cup portion 20 and covers the other longitudinal side of the cup portion 20. The air passage 13 is formed inside the separate body 40. In the present embodiment, the tapered portion 41 constituting the second separating portion 14 is formed inside the separating body 40. The tapered portion 41 is formed in a conical shape with a diameter decreasing toward the cup portion 20 side, and in the present embodiment, a plurality of tapered portions are arranged in an annular shape surrounding the central axis of the dust collecting device 6. The tapered portion 41 swirls the dust-containing air introduced into the interior to separate the dust, and discharges the separated dust to the second dust collecting portion 15 from the end portion. Further, an exhaust air passage portion 16 is formed inside the separate body portion 40. A filter may be disposed in the exhaust air passage 16. The separated body 40 is provided with a discharge port 17.
Next, the operation of the first embodiment will be explained.
When the dust collecting device 6 is attached to the cleaner body 2, the inlet 10 of the dust collecting device 6 is connected to the suction port 4 in an airtight manner, and an air passage is formed on the suction side of the electric blower 5 so as to communicate with the suction side of the electric blower 5 from the suction port 4 via the inlet 10, the first separator 11, the air passage 13, the second separator 14, the exhaust air passage 16, and the outlet 17. In the present embodiment, the air passage body 3 is connected to the suction port 4 during cleaning.
When the user grips the operation portion formed in the air passage body 3 in a state where power can be supplied from the power supply portion and the setting mechanism sets the operation of the electric blower 5 or the like, the controller drives the electric blower 5 or the like in the set operation. Then, the user moves the upstream end side of the air passage body 3 to a desired position on the ground or the like, and sucks in dust together with air by the negative pressure generated by the driving of the electric blower 5.
The dust-containing air is introduced from the air passage 3 through the suction port 4 from the introduction port 10 to the dust collecting device 6 along the inner peripheral surface of the cup 20, and a swirling air flow is formed between the structural portion 28 and the inner peripheral surface of the cup 20 in the cup body 23. Then, in the first separating section 11, coarse dust is mainly centrifugally separated from the dust-containing air, and the coarse dust is transported to the first dust collecting section 12 in accordance with the swirling air flow flowing along the reverse flow preventing section 37 and collected. The swirling air flow flows from the first dust collector 12 into the enlarged portion 33, passes through the ventilation portion 35, and flows into the first separating portion 11 or the air passage portion 13, thereby compressing coarse dust collected in the first dust collector 12 into the enlarged portion 33. As the airflow rises toward the inside of the expanding portion 33, the backflow and lifting of the dust collected in the first dust collecting part 12 toward the first separating portion 11 side are prevented by the backflow preventing portion 37.
The dust-containing air from which coarse dust has been separated flows into the tapered portions 41 of the second separating portions 14 through the air duct portion 13 from the vent holes 31 of the air discharge duct 30, and forms swirling flows. Then, in the second separation part 14, the fine dust is centrifugally separated and discharged from the tapered part 41, and is collected in the second dust collection part 15.
The air having passed through the second separator 14 is discharged from the dust collector 6 through the discharge port 17 from the exhaust air duct 16. Thereafter, the air is sucked into electric blower 5, cooled by electric blower 5, and then discharged to the outside of cleaner body 2 through the exhaust port.
As described above, according to the first embodiment, in the dust collecting device 6 in which the dust collected in the first dust collecting part 12 is compressed into the expanded part 33 by the airflow passing through the air-passing part 35 formed at the end part of the expanded part 33 on the side of the first separating part 11, the backflow preventing part 37 for preventing the backflow of the dust in the first dust collecting part 12 toward the first separating part 11 is provided, so that even when the airflow flows into the inside of the expanded part 33 and passes through the air-passing part 35, the backflow and the lifting of the dust collected in the first dust collecting part 12 can be suppressed, and the dust collecting device 6 having excellent dust separating performance can be provided.
The backflow prevention portion 37 can be easily formed by being formed in the enlarged portion 33.
Since the reverse flow preventing portion 37 is formed between the enlarged portion 33 and the cup portion 20 along the radial direction of the enlarged portion 33, the reverse flow preventing portion 37 can narrow the gap between the enlarged portion 33 and the cup portion 20, thereby more effectively preventing the dust in the first dust collecting portion 12 from flowing backward toward the first separating portion 11.
Further, since the ventilation portion 35 is provided on the inner peripheral side of the exhaust pipe 30 at the end portion of the enlarged portion 33 on the first separating portion 11 side, the airflow passing through the ventilation portion 35 flows to the downstream side of the first separating portion 11, and thus the amount of airflow sucked into the electric blower 5 can be secured and the suction power can be secured.
Further, by providing the ventilation section 35 on the outer peripheral side of the exhaust pipe 30 at the end of the expanded section 33 on the first separating section 11 side, the airflow passing through the ventilation section 35 can be circulated to the first separating section 11 to reliably form a swirling airflow, and the dust separation efficiency can be improved.
By integrally and continuously forming the reverse flow preventing portion 37, it is difficult to generate an air flow from the first dust collecting portion 12 toward the first separating portion 11 side via between the end portions of the reverse flow preventing portion 37, and the reverse flow of the dust of the first dust collecting portion 12 toward the first separating portion 11 side can be more effectively suppressed.
Further, by forming the reverse flow preventing portion 37 in a spiral shape by making one or more turns, the reverse flow preventing portion 37 can concentrate the turning air flow to improve the compression performance, and the projection area of the reverse flow preventing portion 37 as viewed in the axial direction can be secured, so that the reverse flow of the dust collected in the first dust collecting portion 12 toward the first separating portion 11 can be more effectively suppressed.
(second embodiment)
Next, a second embodiment will be described with reference to fig. 6. Note that the same components and functions as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The dust collecting device 6 of the present embodiment is formed for more than one round so that the backflow prevention unit 37 has at least a partially overlapped portion. In the example of fig. 6, the backflow prevention portion 37 is continuously formed integrally by turning for substantially two revolutions. At this time, it is preferable that the interval of the reverse flow preventing part 37 is set to be narrower than the interval G1 on the first dust collecting part 12 side, i.e., the lower side interval G2 on the first dust collecting part 12 side. The interval of the reverse flow preventing section 37 may be set to be gradually narrowed continuously from the upper side, which is the first separating section 11 side, to the lower side, which is the first dust collecting section 12 side, or may be set to be narrower than the interval of the first separating section 11 side from a predetermined position, which is a boundary between the first dust collecting section 12 side and the predetermined position.
Further, since the reverse flow preventing portion 37 is formed to rotate substantially twice, the rotating airflow flowing along the reverse flow preventing portion 37 can be more reliably sent to the first dust collecting portion 12 by being lowered, and the reverse flow and the lifting of the dust collected in the first dust collecting portion 12 can be more effectively suppressed even when the airflow flows into the inside of the expanding portion 33 and passes through the ventilation portion 35.
Further, by setting the interval of the reverse flow preventing portion 37 to be narrower on the lower side as the first dust collecting portion 12 side than on the upper side as the first separating portion 11 side, the airflow can be contracted and the flow velocity can be secured as the airflow approaches the first dust collecting portion 12 side which is the downstream side of the swirling airflow, and the swirling airflow flowing along the reverse flow preventing portion 37 can be more reliably made to flow from the first separating portion 11 side to the first dust collecting portion 12 side.
(third embodiment)
Next, a third embodiment will be described with reference to fig. 7. The same components and functions as those of the above embodiments are denoted by the same reference numerals, and descriptions thereof are omitted.
The dust collecting device 6 of the present embodiment is formed with a plurality of the reverse flow preventing portions 37 separately from each other.
The reverse flow preventing portions 37 are formed in arc shapes, and are separated from each other in the circumferential direction of the dust collecting device 6. In the present embodiment, the backflow prevention portions 37 are formed in a range of about 90 ° in the circumferential direction of the enlarged portion 33. The backflow prevention portions 37 may be also separated from each other in the vertical direction, which is the axial direction of the enlarged portion 33. In the present embodiment, the reverse flow preventing portions 37 are alternately arranged in the circumferential direction on the upper side, which is the first separating portion 11 side, and on the lower side, which is the first dust collecting portion 12 side. Further, the circumferential ends of the enlarged portions 33 of the plurality of the reverse flow preventing portions 37 may be circumferentially separated from each other or may be circumferentially overlapped with each other.
Further, by forming the plurality of reverse flow preventing portions 37 separately from each other, a part of the swirling air flow can be guided to the first dust collecting portion 12 side from the gap between the reverse flow preventing portions 37 separated from each other, and the pressure loss by the reverse flow preventing portions 37 can be suppressed.
(fourth embodiment)
Next, a fourth embodiment will be described with reference to fig. 8A and 8B. The same components and functions as those of the above embodiments are denoted by the same reference numerals, and descriptions thereof are omitted.
The distance between the backflow prevention portion 37 and the enlarged portion 33 or the cup portion 20 of the dust collection device 6 of the present embodiment is set to be narrower on the lower side, which is the first dust collection portion 12 side, than on the upper side, which is the first separation portion 11 side. In the present embodiment, since the reverse flow preventing portion 37 is formed in the enlarged portion 33, the interval between the reverse flow preventing portion 37 and the inner circumferential surface of the cup portion 20 is set narrower on the lower side, which is the first dust collecting portion 12 side, than on the upper side, which is the first separating portion 11 side.
The distance between the reverse flow preventing portion 37 and the cup portion 20 may be set such that the width of the reverse flow preventing portion 37 is larger on the first dust collecting portion 12 side than on the first separating portion 11 side as shown in fig. 8A, and the distance between the reverse flow preventing portion 37 and the cup portion 20 is smaller on the first dust collecting portion 12 side than on the first separating portion 11 side, or the distance between the reverse flow preventing portion 37 and the cup portion 20 may be set such that the inner peripheral surface of the cup portion 20 is inclined so as to be reduced in diameter from the first separating portion 11 side to the first dust collecting portion 12 side as shown in fig. 8B, and the distance between the reverse flow preventing portion 37 and the cup portion 20 is smaller on the first dust collecting portion 12 side than on the first separating portion 11 side, or a combination thereof.
Further, the interval between the backflow prevention portion 37 and the enlarged portion 33 or the cup portion 20 is narrower on the lower side on the first dust collection part 12 side than on the upper side on the first dust collection part 11 side, so that the airflow can be constricted more toward the first dust collection part 12 side on the downstream side of the swirling airflow to ensure the flow velocity, the swirling airflow flowing along the backflow prevention portion 37 can be made to flow more reliably from the first dust collection part 11 side to the first dust collection part 12 side, and the backflow of dust from the first dust collection part 12 side can be more reliably suppressed.
(fifth embodiment)
Next, a fifth embodiment will be described with reference to fig. 9. The same components and operations as those of the above embodiments are denoted by the same reference numerals, and descriptions thereof are omitted.
The dust collecting device 6 of the present embodiment can open and close the portion of the cup 20 corresponding to the first dust collecting part 12. In the example of fig. 9, the bottom of the cup 20 is openable and closable, but the opening and closing position is not limited thereto.
The cup portion 20 is formed such that the position of the cup body portion 23 can be attached to and detached from the enlarged cup portion 24, for example. The opening/closing position of the cup 20 may be, for example, the bottom of the cup 20.
Further, by opening and closing the cup portion 20 at a portion corresponding to the first dust collecting part 12, dust compressed and collected in the first dust collecting part 12 can be easily discarded by opening the cup portion 20.
In each of the above embodiments, the backflow prevention portion 37 may protrude from the inner circumferential surface of the cup portion 20 toward the enlarged portion 33. In this case, too, the effect of preventing the dust collected in the first dust collection part 12 from flowing backward toward the first separation part 11 is exhibited.
The second separating unit 14 of the dust collecting device 6 is configured to centrifugally separate dust, but may be a filter or the like. The second separating section 14 and the second dust collecting section 15 are not necessarily configured, and the dust collecting device 6 may be provided with one separating section and one dust collecting section.
Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.
Claims (6)
1. A dust collecting device is provided with: a separation section for centrifugally separating dust; and a dust collecting unit configured to collect the dust separated by the separating unit, the separating unit and the dust collecting unit being disposed along a rotation center of a centrifugally separated swirling air flow, the dust collecting device including:
a cylindrical cup part into which dust-containing air is introduced, the separation part and the dust collection part being located inside the cup part;
a cylindrical insertion member disposed inside the cup portion and provided between the separation portion and the dust collection portion;
a ventilation portion formed on the separation portion side of the insertion member and capable of ventilating from the dust collection portion side to the separation portion side;
a reverse flow preventing part which is positioned between the inner inserting part and the cup part and prevents the dust of the dust collecting part from reversely flowing to the separating part side; and
a cylindrical tube part which is positioned in the separation part and through which a part of the dust-containing air passes;
a part of the ventilation part is positioned on the inner peripheral side of the cylinder part at the end part of the insertion part on the separation part side,
the reverse flow preventing part is formed in the insertion member, and is formed in a spiral shape by one or more turns in a radial direction of the insertion member between the insertion member and the cup part.
2. The dust collecting device according to claim 1,
the backflow prevention part is integrally and continuously formed.
3. The dust collecting device according to claim 1 or 2,
the reverse flow preventing part is formed to have at least one part of repeated parts for more than one circle,
the interval of the reverse flow preventing part is set to be narrower on the dust collecting part side than on the separating part side.
4. The dust collecting device according to claim 1 or 2,
the distance between the reverse flow preventing part and the cup part is set to be narrower on the dust collecting part side than on the separating part side.
5. The dust collecting device according to claim 1 or 2,
the cup portion is capable of opening and closing a portion corresponding to the dust collecting portion.
6. An electric vacuum cleaner comprising the dust collecting device according to any one of claims 1 to 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018113798A JP7074576B2 (en) | 2018-06-14 | 2018-06-14 | Dust collector and vacuum cleaner |
| JP2018-113798 | 2018-06-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110604510A CN110604510A (en) | 2019-12-24 |
| CN110604510B true CN110604510B (en) | 2022-08-02 |
Family
ID=68889594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910417339.4A Active CN110604510B (en) | 2018-06-14 | 2019-05-20 | Dust collecting device and electric dust collector |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7074576B2 (en) |
| CN (1) | CN110604510B (en) |
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|---|---|---|---|---|
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| Publication number | Publication date |
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| JP2019213787A (en) | 2019-12-19 |
| CN110604510A (en) | 2019-12-24 |
| JP7074576B2 (en) | 2022-05-24 |
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