JP6539002B1 - Dust collector and vacuum cleaner - Google Patents

Abstract

To provide a dust collecting apparatus capable of suppressing rolling up of dust from a dust collecting part and an electric vacuum cleaner provided with the same.
A dust collection device (1) includes a cylindrical case (10) and an insertion portion (16). The case 10 has an inlet 3 into which dust-containing air is introduced. The interpolator 16 is positioned inward of the case 10 and a swirling flow A of dusty air is formed between the intercalation portion 16 and the inner surface 14 of the case 10. The insertion portion 16 has a cylindrical side portion 26 and a protrusion 30. The side surface portion 26 is spaced apart and opposed to the inner surface 14 of the case 10. The protruding portion 30 includes a protruding surface 32 that protrudes outward with respect to the side surface portion 26 on the first dust collection portion 5 side. The projecting surface 32 includes a plurality of rectifying units 35 and a connecting unit 36. The straightening unit 35 is formed in a spiral shape from the upstream side to the downstream side of the swirling flow A toward the first dust collection unit 5 side. The connection portion 36 is formed by connecting the downstream end side of one rectification portion 35 and the upstream end side of the other rectification portion 35.
[Selected figure] Figure 1

Description

  An embodiment of the present invention is a dust collecting apparatus having a separation unit that swirls dust-containing air to centrifugally separate dust, and a dust collection unit that stores dust separated by the separation unit, and a vacuum cleaner including the dust collection unit About.

  2. Description of the Related Art Conventionally, as a dust collection apparatus used for a vacuum cleaner, there is one that swirls dust-containing air to centrifuge dust. In such a dust collecting apparatus, an exhaust pipe is coaxially disposed inward of a cylindrical case in which the upper part is a separation part and the lower part is a dust collection part, and dust-containing air is disposed between the inner surface of the case and the exhaust pipe To separate dust from dust.

  Moreover, what provided the shielding member in the boundary part of the isolation | separation part and the dust collection part in order to prevent winding up of the dust from a dust collection part is known. However, in the conventional shielding member, suppression of the rolling-up of dust from the dust collection portion is not sufficient, and a configuration to suppress such rolling-up is desired.

JP, 2017-158805, A

  The problem to be solved by the present invention is to provide a dust collecting apparatus capable of suppressing the rolling up of dust from the dust collecting part and a vacuum cleaner provided with the same.

  The dust collection apparatus according to the embodiment includes a separation unit that swirls dust-containing air to centrifugally separate dust, and a dust collection unit that stores dust separated by the separation unit. The dust collector comprises a cylindrical case and a structure. The case has an inlet through which dusty air is introduced. The structural portion is located inward of the case and a swirling flow of dust-containing air is formed between the structure and the inner surface of the case. This structure part has a cylindrical side part and a projection. The side surface portion is spaced apart and opposed to the inner surface of the case. The projecting portion is provided with a projecting surface that protrudes outward with respect to the side surface portion on the dust collection portion side. The protruding surface includes a plurality of rectifying units and a connecting unit. The straightening unit is formed in a spiral shape that is directed from the upstream side to the downstream side of the swirling flow toward the dust collection unit side. The connection part is formed by connecting the downstream end of one rectification part and the upstream end of the other rectification part.

It is a side view which notches one part and shows the dust collector of 1st Embodiment. It is a side view which shows a part of the same dust collector. It is a perspective view of the same above-mentioned dust collector. It is a perspective view which shows a part of structural part of a dust collector same as the above. It is a perspective view which shows a part of structural part of the same above-mentioned dust collector from the opposite direction to FIG. It is a top view of a part of structural part of a dust collector same as the above. It is a side view of a part of structural part of a dust collector same as the above. It is a perspective view which shows the electric vacuum cleaner provided with the dust collector same as the above. It is sectional drawing which shows a part of structural part of the dust collector of 2nd Embodiment. It is a perspective view which shows a part of structural part of the dust collector of 3rd Embodiment. It is a perspective view which shows a part of structural part of the same above-mentioned dust collector from the direction opposite to FIG. It is a top view of a part of structural part of a dust collector same as the above. It is a side view of a part of structural part of a dust collector same as the above.

First Embodiment
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 8.

  In FIGS. 1 to 3, reference numeral 1 denotes a dust collector. The dust collection device 1 separates and collects dust from dust-containing air sucked by a suction source, and is used for a vacuum cleaner 2 described later.

  And, the dust collection device 1 is a centrifugal separation type dust collection device that swirls the dust-containing air to centrifuge the dust. The dust collection device 1 has, as an air passage configuration, an inlet 3 to which dust-containing air is introduced, and a first centrifugal separator 4 which is a separation unit that centrifuges dust from the dust-containing air introduced by the inlet 3. A first dust collection unit 5 that is a dust collection unit that collects dust separated by the first centrifugal separation unit 4, and a plurality of, for example, a plurality of first dust separation units that further separates dust that is not separated by the first centrifugal separation unit 4; A second centrifugal separator 6, a second dust collector 7 for collecting the dust separated by the second centrifugal separator 6, and an outlet 8 for discharging the air from which the dust has been separated are provided. That is, although the dust collection device 1 of this embodiment is configured to include multistage centrifugal separation parts, the second centrifugal separation part 6 and the second dust collection part 7 are not essential components.

  Further, the dust collection device 1 structurally includes a case 10 and a separation body 11, and the case 10 and the separation body 11 can be attached and detached.

  The case 10 is formed in a tubular shape, for example, by a member such as a synthetic resin. In the present embodiment, the case 10 is formed in a bottomed cylindrical shape. For this reason, the case 10 has a cylindrical outer peripheral surface 12 which is an outer surface, and a bottom 13 which covers the end of the outer peripheral surface 12, and the inner surface 14 is formed in a cylindrical surface. That is, the upper side in FIG. 1 is opened. Further, an inlet 3 is formed in the case 11 and dust-containing air is introduced from the inlet 3 along the inner surface 14 of the case 11 to form a swirling flow. The first centrifugal separator 4 is formed on one end side, that is, the upper side in FIG. 1, and the first dust collection unit 5 is formed on the other end, that is, the lower side in FIG. Ru.

  The separation body 11 is detachably locked to the case 10 by the locking portion 15. In addition, the separated body 11 is provided with an interpolation portion 16 which is a structural portion located inside the case 10. The insertion portion 16 is a portion where a swirling flow of dust-containing air is formed with the inner surface 14 of the case 14. The interpolation unit 16 is disposed coaxially or substantially coaxially with the case 10, for example. Further, the insertion portion 16 includes an exhaust cylinder 20 which is a cylindrical ventilation portion for discharging the air from the first centrifugal separation portion 4. The exhaust cylinder 20 is formed in a cylindrical shape. Further, the exhaust cylinder 20 is provided with a vent hole 21. A plurality of vent holes 21 are formed around the exhaust cylinder 20, for example. Further, the vent holes 21 may be covered by an exhaust filter 22 which is, for example, a filter.

  Further, the interpolation unit 16 is provided with a tubular enlarged portion 24. As shown in FIG. 1, FIG. 2, and FIG. 4 to FIG. 7, the enlarged part 24 forms the boundary between the first centrifugal separation part 5 and the first dust collection part 6. Further, the enlarged portion 24 is located on the first dust collection portion 6 side of the exhaust cylinder 20. Furthermore, the enlarged portion 24 is formed to be expanded outward from the exhaust cylinder 20. That is, the enlarged portion 24 is formed to have a larger diameter than the exhaust cylinder 20. Further, the enlarged portion 24 is disposed coaxially or substantially coaxially with the exhaust cylinder 20. Furthermore, the enlarged portion 24 is formed in a cylindrical shape with a lid that is open on the first dust collection portion 6 side, that is, the side facing the bottom portion 13 of the case 10. Therefore, the enlarged portion 24 includes the cylindrical side surface portion 26 and the top surface portion 27 which is a surface on the exhaust cylinder 20 side.

  The side surface part 26 comprises the outer peripheral surface of the expansion part 24 in this embodiment. The side surface portion 26 is formed in a cylindrical shape and extends along the axial direction of the case 10. Further, the side surface portion 26 is spaced apart and opposed to the inner surface 14 of the case 10. That is, a gap is formed between the side surface portion 26 and the inner surface 14 of the case 10. The gap is formed narrower than the gap between the exhaust cylinder 20 and the inner surface 14 of the case 10. Therefore, between the side face portion 26 and the inner surface 14 of the case 10, the flow velocity of the swirling flow of the dust-containing air is higher than that between the exhaust stack 20 and the inner surface 14 of the case 10. Further, an end of the side face 26 opposite to the bottom 13 is separated from the bottom 13. Further, the side surface portion 26 is formed with a projecting portion 30 which is a blade portion. The protrusion 30 protrudes outward with respect to the side surface 26. That is, the protruding portion 30 protrudes in the radial direction with respect to the side surface portion 26. In addition, the outer edge of the protrusion 30 is located away from the inner surface 14 of the case 10. Furthermore, while the protrusion part 30 is continuously formed, for example in the circumferential direction of the expansion part 24, both ends are not continuous with each other but are separated. That is, in the present embodiment, the protruding portion 30 includes the intermittent portion 31. Moreover, the protrusion part 30 equips the 1st dust collection part 5 side with the protrusion surface 32. As shown in FIG. Furthermore, in the present embodiment, the projecting portion 30 is formed in a plate shape including the opposite projecting surface 33 on the side of the first centrifugal separation part 4 opposite to the projecting surface 32.

  The intermittent portion 31 is formed on the downstream side of the swirling flow at a position facing the inlet 3. That is, in the present embodiment, the projecting portion 30 is formed to be discontinuous at least at a position facing the inlet 3.

  The protruding surface 32 protrudes outward with respect to the side surface portion 26. That is, the projecting surface 32 is formed to project in the radial direction with respect to the enlarged portion 24. Further, the protruding surface 32 is located on the first dust collection portion 5 side with respect to the inlet 3 at a position facing the inlet 3. Furthermore, the projecting end 32 is located within the upstream half of the swirling flow relative to the inlet 3 with respect to the upstream end. The protruding surface 32 is provided with a plurality of rectifying units 35 and a connecting unit 36 that connects the rectifying units 35.

  Each of the flow straightening units 35 is formed in a spiral shape from the upstream side to the downstream side of the swirling flow of the dust-containing air toward the first dust collection unit 5 side. Each of the straightening units 35 is formed such that the upstream end thereof gradually protrudes outward with respect to the side surface portion 26 from the inlet 3 side toward the downstream side of the swirling flow. In the present embodiment, for example, two rectifying units 35 are formed. That is, in the present embodiment, the straightening unit 35 located on the upstream side of the swirling flow and the straightening unit 35 located on the downstream side are set. The downstream end of the straightening unit 35 located upstream may be located upstream of the swirling flow than the upstream end of the straightening unit 35 located downstream, or the upstream end of the straightening unit 35 located downstream It may wrap around the end and the circumferential direction. In addition, the amount that the flow straightening unit 35 protrudes outward with respect to the side surface portion 26 may not be constant even at positions other than the upstream end, and this amount may be increased or decreased at any position. For example, in the present embodiment, the downstream end of the straightening unit 35 located downstream is formed such that the amount of protrusion gradually with respect to the side surface portion 26 decreases toward the downstream side of the swirling flow.

  The connection portion 36 is formed by connecting the downstream end side of one rectification portion 35 and the upstream end side of the other rectification portion 35. The connecting portion 36 is formed smoothly and continuously with respect to each of the rectifying portions 35. Further, in the present embodiment, the connecting portion 36 is formed by connecting the downstream end side of the rectifying portion 35 positioned upstream and the upstream end side of the rectifying portion 35 positioned downstream. Therefore, the connecting portion 36 is inclined toward the first centrifugal separator 4 toward the upstream end side of the rectifying portion 35 positioned downstream from the downstream end side of the rectifying portion 35 positioned upstream. That is, the inclination direction of the connecting portion 36 is different from the inclination direction of each of the rectifying portions 35. For this reason, the projecting portion 30 is formed to be curved at a position corresponding to the connecting portion 36.

  The opposite projecting surface 33 is basically formed parallel to the projecting surface 32. The opposite side protruding surface 33 may be formed to be inclined outward to the downstream side of the swirling flow at a position corresponding to the connection portion 36. That is, the opposite side projecting surface 33 may be formed to be inclined to the downstream side of the swirling flow with respect to the normal direction of the side surface portion at that position.

  In addition, the protrusion surface 32 and the opposite side protrusion surface 33 are not limited to planar shape respectively, for example, are curved and formed in the 1st centrifugal separation part 4 side, the 1st dust collection part 5 side, etc. It is also good.

  The top surface portion 27 is formed along a direction intersecting the axial direction of the exhaust cylinder 20. Further, an opening 37 is formed in the top surface 27. The opening 37 is formed in a portion of the top surface portion 27 that is expanded beyond the exhaust cylinder 20 and extends outward. Further, in the top surface portion 27, a plurality of openings 37 are formed along the outer edge portion, that is, the outer periphery of the top surface portion 27. For example, each opening 37 is formed as an arc-shaped elongated hole curved along the circumferential direction. Furthermore, the openings 37 are disposed at circumferentially separated positions. Also, the opening 37 may be covered by a ventilation filter 38, which is, for example, a filter.

  Further, the ventilation opening 40 may be formed in the top surface 27. The ventilation opening 40 is disposed at the center of the top surface 27 facing the exhaust cylinder 20. The ventilation opening 40 is formed, for example, as a circular hole. Further, the ventilation opening 40 may be covered by a compression filter 41 which is a filter.

  Further, the top surface portion 27 may be formed with a connection portion 44 for detachably connecting the exhaust cylinder 20 and the enlarged portion 24. The connecting portion is, for example, an engaging portion 45 which protrudes from the periphery of the ventilation opening 40 and is engaged with an end of the exhaust cylinder 20 on the enlarged portion 24 side, and a position inward of the opening 37 at the top surface 27 And a positioning portion 46 that protrudes toward the first centrifugal separation portion 4 to position the exhaust cylinder 20. The connection unit 44 is not an essential component.

  Further, a wall 48 is formed on the top surface 27. The wall portion 48 is formed in a rib shape so as to project toward the first centrifugal separation portion 4 with respect to the top surface portion 27. The wall 48 is formed at a position corresponding to at least the outside of the opening 37. Specifically, the wall 48 is a position outside the opening 37 and along at least a portion of the opening 37, and the end of the wall 48 is shorter than the end of the opening 37. It may be located at substantially the same position as the end of the opening 37, or may protrude long from the end of the opening 37. Furthermore, the end 48 a of the wall portion 48 on the first centrifugal separation portion 4 side protrudes to the first centrifugal separation portion 4 side more than the position E of the inlet 3 closest to the first dust collection portion 5. In the wall portion 48, the end 48a of the wall portion 48 on the first centrifugal separation portion 4 side protrudes toward the first centrifugal separation portion 4 with respect to the position E of the introduction port 3 closest to the first dust collection portion 5 The amount M to be set is set to 1⁄4 or less with respect to the inlet width W in the axial direction which is the longitudinal direction of the case 10. The position of the top surface portion 27 on the side of the exhaust cylinder 20 may be, for example, flush with or substantially flush with the position E of the inlet 3 closest to the first dust collection portion 5, or to the first centrifugal separation portion 4 side. It may be present or may be on the side of the first dust collection unit 5. Furthermore, a pair of wall portions 48 is formed, for example. The wall portions 48 are located apart from each other at a position facing the inlet 3 and a position opposite to the wall. Therefore, each wall portion 48 is curved in an arc shape when viewed in the axial direction.

  In addition, the separated body 11 is provided with the dividing portion 50. The partitioning portion 50 is a portion that partitions the second dust collection unit 7 with the case 10. The partition 50 includes, for example, a seal member 51. The seal member 51 is in pressure contact with the step portion 52 formed on one end side of the case 10 in an enlarged manner to close the one end side of the case 10, and a portion of the case 10 at one end side than the step portion 52 The second dust collection part 7 is separated and partitioned from the first centrifugal separation part 4 and the first dust collection part 5. In addition, in the dividing portion 50, an inclined portion 53 may be formed which is a dust collecting portion for guiding the dust centrifugally separated by the second centrifugal separation portion 6 to the second dust collection portion 7.

  Furthermore, the separation body 11 includes a separation main body 55 that covers one end side of the case 10. The separation main body 55 is located outside the case 10. Further, although not shown, a wind guide portion for guiding the air discharged from the exhaust cylinder 20 to the second centrifugal separation portion 6 is formed inside the separation main body portion 55. Furthermore, a plurality of cone portions 57 that constitute the second centrifugal separation portion 6 are formed inside the separation main body portion 55. The cone portion 57 is formed in a conical shape whose diameter is reduced toward the case 10 side, and is disposed in an annular shape. Then, each cone portion 57 swirls the dust-containing air introduced into the inside to separate the dust, and discharges the separated dust from the inclined portion 53 to the second dust collection portion 7. Further, although not shown, an exhaust part that guides the air discharged from the second centrifugal separation part 6 to the exhaust port 8 is formed inside the separation main part 55. For example, a filter may be disposed at the exhaust air portion. The discharge port 8 is formed in the separation body 55. In addition, an attachment / detachment mechanism 58 for attaching / detaching the dust collection device 1 to / from the vacuum cleaner 2 may be formed in the separation main body 55.

  The vacuum cleaner 2 is provided with the main-body part 60 to which the dust collecting apparatus 1 is attached so that attachment or detachment is possible. Moreover, the vacuum cleaner 2 is provided with the electric blower 61 used as a suction source. Furthermore, the vacuum cleaner 2 is provided with a control unit (not shown) that controls the operation of the electric blower 61. Moreover, the vacuum cleaner 2 is provided with the operation part 63 which operates start and stop of the electric blower 61. In the present embodiment, the vacuum cleaner 2 is exemplified by, for example, a long stick-type vacuum cleaner provided with an air passage body 64 attachable to and detachable from the elongated main body 60, for example. However, it may be a canister type capable of traveling on a floor surface or may be a self-propelled type capable of autonomous traveling.

  Next, the operation of the first embodiment will be described.

  At the time of cleaning using the vacuum cleaner 11, the user mounts the dust collecting apparatus 1 on the main body 60, operates the operation unit 63 to operate the electric blower 61, and uses the air passage body 64 to operate the electric blower Using the negative pressure generated by the drive of 61, the dust on the surface to be cleaned is sucked with air.

  Dust-containing air is sucked from the air passage body 64 through the main body 60 into the dust collection device 1 from the inlet 3. At this time, the dust-containing air is introduced along the tangential direction of the inner surface 14 of the case 10 by the inlet 3 to generate the swirling flow A between the insertion portion 16 and the inner surface 14 of the case 10.

  The swirling flow A swirls between the exhaust cylinder 20 and the inner surface 14 to centrifugally separate the dust by the first centrifugal separation unit 4 and accelerates the flow velocity between the side surface 26 and the inner surface 14 of the enlarged portion 24. It flows to the first dust collection unit 5 while turning along the protrusion 30. At this time, dust is gradually compressed downward by the swirling flow A flowing along each of the rectifying portions 35.

  Thereafter, the swirling flow A enters the inside of the enlarged portion 24 and a part thereof circulates through the opening 37, and the other part passes through the ventilation opening 40. At this time, the dust accumulated in the first dust collection unit 5 is compressed.

  The dust-containing air that has passed to the exhaust cylinder 20 is introduced from the air guide portion to the cone portion 57 of the second centrifugal separation portion 6, swirls within the cone portion 57, and the fine dust is further separated. It is stored in the dust collection unit 7. Then, the air from which the dust has been separated is discharged from the exhaust port 8 to the outside of the dust collection device 1 through the exhaust part, sucked into the electric blower 61, cooled after the electric blower 61 is exhausted, and exhausted. .

  Here, when the dust accumulated in the first dust collection unit 5 increases, the swirling flow A becomes difficult to flow, and the dust-containing air tends to flow to the exhaust stack 20 side by the negative pressure. At this time, the projection surface 32 includes the connection portion 36 formed by connecting the downstream end side of one flow straightening portion 35 and the upstream end side of the other flow straightening portion 35, whereby dust is contained by the connection portion 36. It is possible to suppress the air from flowing into the exhaust cylinder 20 due to the negative pressure, and to suppress the rolling up of dust.

  In addition, since the projecting portion 30 includes the intermittent portion 31 between at least any two adjacent rectifying portions 35, relatively large dust is not caught on the projecting portion 30 from the intermittent portion 31 to the first dust collection portion 5 It becomes easy to be stored.

  In particular, since the intermittent portion 31 is formed on the downstream side of the swirling flow A at a position facing the inlet 3, relatively large dust in the dust-containing air introduced from the inlet 3 is immediately transmitted to the intermittent portion 31. As a result, the dust can be easily stored in the first dust collection unit 5, and the dust separation efficiency can be improved.

  Further, since the upstream end of the flow straightening unit 35 is formed so as to gradually protrude outward with respect to the side surface portion 26 from the inlet 3 side toward the downstream side of the swirling flow A, The dust fed to the dust collection unit 5 is less likely to be caught by the protrusion 30.

  Furthermore, since the projection surface 32 is positioned on the first dust collection portion 5 side with respect to the introduction port 3 at a position facing the introduction port 3, the introduction of dust-containing air from the introduction port 3 is unlikely to be hindered by the projection surface 32.

  Further, since the upstream end of the projecting surface 32 is located within a half turn of the upstream side of the swirling flow A with respect to the inlet 3, the swirling flow A is formed by efficiently guiding the dust-containing air introduced from the inlet 3. can do.

  In addition, the opposite projecting surface 33 on the side of the first centrifugal separation part 4 opposite to the projecting surface 32 of the projecting part 30 is inclined outward toward the downstream side of the swirling flow A at a position corresponding to the connecting part 36 The dust contained in the swirling flow A along the opposite projecting surface 33 is easily accumulated toward the first dust collection portion 5 from the position where the opposite projecting surface 33 is inclined.

  Further, the top surface portion 27 on the exhaust cylinder 20 side of the enlarged portion 24 enlarged outward from the cylindrical exhaust cylinder 20 for discharging the swirling flow A is formed at a position expanded outward from the exhaust cylinder 20 Of the wall portion 48 and the case 10 by projecting the wall portion 48 from the top surface portion 27 on the exhaust cylinder 20 side of the enlarged portion 24 to the first centrifugal separation portion 4 side corresponding to the outside of the opening portion 37 The swirling flow A can be strengthened by taking a distance facing the inner surface 14, and the air flow passing through the opening 37 can be guided to the outside of the exhaust stack 20 by the wall portion 48. Therefore, the dust separation efficiency can be improved while suppressing the adhesion of the dust to the exhaust stack 20.

  Further, since the end 48 a of the wall portion 48 on the first centrifugal separation portion 4 side protrudes to the first centrifugal separation portion 4 side from the position E of the inlet 3 closest to the first dust collection portion 5, the wall The swirling flow A can be strengthened by securing a sufficient distance between the portion 48 and the inner surface 14 of the case 10, and the dust separation performance can be further improved.

  The amount M of protrusion of the first centrifugally separating portion 4 of the end portion 48a of the wall portion 48 on the first centrifugally separating portion 4 side is greater than the position E of the inlet port 3 closest to the first dust collecting portion 5 Since it is set to 1/4 or less with respect to the introduction port width W in the longitudinal direction, the exhaust cylinder can secure a sufficient distance between the wall portion 48 and the inner surface 14 of the case 10 to strengthen the swirling flow A. The air flow drawn to the air flow 20 is less likely to be blocked by the wall 48.

Second Embodiment
Next, a second embodiment will be described with reference to FIG. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The present embodiment is provided with a flange portion 68 projecting from the outer edge portion of the projecting portion 30 to the first centrifugal separation portion 4 side.

  For example, the front end of the flange 68 may be flush with or substantially flush with the end 48 a of the wall 48, or the first dust collection unit 5 may be flush with the end 48 a of the wall 48. It may be located on the side, ie the lower side of FIG. In addition, the flange portion 68 may be continuously formed at a position corresponding to each of the flow straightening portion 35 and the connection portion 36 in the projecting portion 30.

  As described above, even when the flange portion 68 is formed in the protrusion 30, the same function and effect as those of the first embodiment can be obtained.

Third Embodiment
Next, a third embodiment will be described with reference to FIGS. 10 to 13. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The present embodiment does not include the wall portion 48 in the first embodiment.

  Moreover, the amount which protrudes outward with respect to the side part 26 is formed substantially constant except the upstream end.

  As described above, even when the wall portion 48 is not provided, the protruding surface 32 of the protruding portion 30 has the effect of suppressing the dust from being picked up from the first dust collection unit 5.

  In each of the above embodiments, the projecting portion 30 may be formed continuously over the entire circumference. That is, the upstream end side and the downstream end side of each of the rectifying portions 35 may be connected by the connecting portion 36, respectively.

  In the case 10, the bottom portion 13 may be opened and closed, and dust accumulated in the first dust collection unit 5 and the second dust collection unit 7 may be discharged from the lower side.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 1 dust collector 2 electric vacuum cleaner 3 introduction port 4 1st centrifugal separation part which is a separation part 5 1st dust collection part which is a dust collection part
10 cases
14 Inside
Interpolation part which is 16 structural parts
20 Exhaust vent that is the vent
26 side
30 protrusions
31 intermittent part
32 projecting surface
33 Opposite side
35 Rectifier
36 Joint
68 Flange part A swirling flow

Claims (9)

A dust collection apparatus comprising: a separation unit that swirls dust-containing air to centrifugally separate the dust; and a dust collection unit that stores the dust separated by the separation unit,
A cylindrical case having an introduction port into which the dust-containing air is introduced;
And a structure portion located inside the case and in which a swirling flow of the dust-containing air is formed between the case and the inner surface of the case;
The structural part is
A cylindrical side portion spaced apart and opposed to the inner surface of the case;
And a protruding portion provided with a protruding surface that protrudes outward with respect to the side surface portion on the dust collection portion side,
The protruding surface is
A plurality of flow straighteners formed in a spiral shape, from the upstream side to the downstream side of the swirling flow and toward the dust collection unit side;
A dust collector, comprising: a connecting portion formed by connecting the downstream end of one of the straightening units and the upstream end of the other straightening unit. The dust collecting apparatus according to claim 1, wherein the protrusion includes an intermittent portion between at least any two adjacent flow straightening portions. The said intermittent part is formed in the downstream of the said rotational flow of the position which opposes the said inlet port. The dust collector of Claim 2 characterized by the above-mentioned. The upstream end of the straightening unit is formed so as to gradually protrude outward with respect to the side surface portion from the inlet side toward the downstream side of the swirling flow. The dust collector of any one statement. The dust collecting apparatus according to any one of claims 1 to 4, wherein the projecting surface is positioned on the dust collection portion side with respect to the introduction port at a position facing the introduction port. The dust collecting apparatus according to any one of claims 1 to 5, wherein an upstream end of the projecting surface is positioned within an upstream half circumference of the swirling flow with respect to the inlet. The projecting portion is formed to have an opposite projecting surface on the side of the separation portion opposite to the projecting surface,
The collection according to any one of claims 1 to 6, wherein the opposite side protruding surface is formed to be inclined outward toward the downstream side of the swirling flow at a position corresponding to the connection portion. Dust device. The dust collecting apparatus according to any one of claims 1 to 7, further comprising: a flange portion which protrudes from the outer edge portion of the protruding portion toward the separation portion. A vacuum cleaner comprising the dust collecting apparatus according to any one of claims 1 to 8.

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