Electric vacuum cleaner

Abstract

To provide an electric vacuum cleaner capable of smoothly conveying dust into a dust collection chamber.SOLUTION: An electric vacuum cleaner according to the present disclosure includes: a blower which generates suction airflow; and a dust collection device which separates dust from dust-containing air suctioned by the suction airflow. The dust collection device comprises: a dust collection cup in which a first dust collection chamber for storing dust is formed; a revolving part which revolves the dust-containing air; a first opening which is formed on the side wall at an upper part of the revolving part for transporting dust into the first dust collection chamber; and a first rib which is disposed at a position adjacent to the first opening on a side opposite to the revolving direction of the dust-containing air.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a vacuum cleaner.

Background Art

[0002] Patent Document 1 below discloses a cyclone dust collecting device for a vacuum cleaner, which includes a cylindrical cyclone body having a dirt discharge port formed so that dirt centrifugally separated from the inflowing air is discharged, a dirt receiving cylinder for collecting the discharged dirt, a base member for closing and connecting their lower ends, and a cover detachably coupled to their upper ends, having an air inlet, an air outlet, and a dirt separation grill extending from the air outlet into the interior of the cyclone body and having a plurality of fine passage holes, and a partition provided between the cyclone body and the dirt receiving cylinder for limiting the movement of the dirt collected in the dirt receiving cylinder.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As a conventional configuration, dust with a large specific gravity is carried from the first opening to the first dust collection chamber of the dust collection cup by the centrifugal force generated in the swirling section, and fine dust with a small specific gravity is carried from the second opening provided on the lower side of the swirling section to the second dust collection chamber. In the case of such a configuration, fibrous dust with a small specific gravity but not fine does not reach either dust collection area and remains in the swirling section, causing dust clogging, or the fibrous dust does not reach the dust collection area and gets caught at the first opening, or the original separation performance may not be exhibited. Furthermore, problems may occur when the user uses the vacuum cleaner, such as clogging of the filter caused by dust clogging in the swirling section or catching at the first opening, or stoppage of the vacuum cleaner operation (lock by airtight detection) caused by filter clogging.

[0005] The present disclosure has been made to solve the above-described problems. An object of the present disclosure is to provide a vacuum cleaner capable of smoothly transporting dust to the dust collection chamber.

Means for Solving the Problems

[0006] The vacuum cleaner according to the present disclosure is a vacuum cleaner including a blower that generates a suction air flow and a dust collection device that separates dust from the dust-containing air sucked by the suction air flow. The dust collection device includes a dust collection cup having a first dust collection chamber formed therein for storing dust, a swirling section for swirling the dust-containing air, a first opening formed in an upper side wall of the swirling section for transporting dust to the first dust collection chamber, and a first rib disposed at a position adjacent to the first opening on the side opposite to the swirling direction of the dust-containing air.

Effects of the Invention

[0007] According to the present disclosure, it is possible to provide a vacuum cleaner capable of smoothly transporting dust to the dust collection chamber.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings. In each figure, common or corresponding elements are denoted by the same reference numerals to simplify or omit the description. When referring to an angle in the present disclosure, in the case where there are a major angle and a minor angle whose sum is 360 degrees, the angle of the minor angle is generally referred to, and in the case where there are an acute angle and an obtuse angle whose sum is 180 degrees, the angle of the acute angle is generally referred to. The configurations shown in the embodiments below are examples of the technical idea according to the present disclosure, and it is possible to combine them with other known technologies, and it is also possible to combine a plurality of technical ideas described in the present disclosure. Further, it is possible to omit or change a part of the configuration without departing from the gist of the present disclosure.

[0010] Embodiment 1. FIGS. 1 to 6 relate to Embodiment 1 of the present disclosure. FIG. 1 is a perspective view of a vacuum cleaner equipped with a dust collecting device, FIG. 2 is a perspective view of the main body of the vacuum cleaner, FIG. 3 is a longitudinal sectional view of the dust collecting device, FIG. 4 is a top view of the swivel part of the dust collecting device, FIG. 5 is a side view of the swivel part, and FIG. 6 is a sectional top view of the swivel part. FIG. 7 is a sectional top view of a dust collecting device of a comparative example. FIG. 8 is a top sectional view of the dust collecting device according to Embodiment 1.

[0011] In the following description, dust and other garbage may be collectively referred to simply as "dust". Also, air containing dust may be referred to as "dust-containing air". And, air from which dust has been removed may be referred to as "clean air".

[0012] The vacuum cleaner 1 equipped with the dust collecting device according to Embodiment 1 of the present disclosure is, for example, a cordless vertical vacuum cleaner. As shown in FIGS. 1 and 2, the vacuum cleaner 1 includes, as main components, a main body 3, a tube body 4, and a suction tool 5. The main body 3 includes a handle 15, an outer shell 16, and a dust collecting device 17. The handle 15 is a part that the user holds by hand during use of the vacuum cleaner 1. The user can grip the main body 3 of the vacuum cleaner 1 by holding the handle 15. The dust collecting device 17 is detachable from the main body 3.

[0013] The outer shell portion 16 is a member that forms the outer shell, i.e., the outer covering, of the main body 3. The outer shell portion 16 of the main body 3 houses an electric blower 23 and a battery unit. The electric blower 23 is for generating the suction air of the vacuum cleaner 1. The battery unit includes a battery for driving the electric blower.

[0014] The outer shell portion 16 is provided with a connecting pipe portion 20. The connecting pipe portion 20 is a hollow cylindrical member to which the pipe body 4 is detachably connected. The connecting pipe portion 20 has a connection port 29 for sucking in dust. The connection port 29 is an opening formed at one end of the connecting pipe portion 20. Inside the connecting pipe portion 20, an air passage is formed to guide the airflow of the dust-containing air that has passed through the connection port 29 to the dust collection device 17. One end of the handle 15 is arranged at the other end of the connecting pipe portion 20 so as to be externally continuous. An operation portion 22 is provided on the other end side of the handle 15.

[0015] The dust collection device 17 is for collecting the dust in the dust-containing air sucked into the main body 3 by the suction air generated by the electric blower 23.

[0016] The dust collection device 17 has a generally cylindrical appearance as a whole. As will be described later, the dust collection device 17 according to this embodiment corresponds to a cyclone separation device. A cyclone separation device is a device that swirls the dust-containing air inside by the air flow generated by the electric blower 23 to separate dust from the dust-containing air.

[0017] As shown in FIG. 2, the outer shell portion 16 is provided with an exhaust portion 21. The exhaust portion 21 is an opening formed in the outer shell portion 16. The airflow from which the dust has been removed by the dust collection device 17 is discharged from the exhaust portion 21 to the outside of the main body 3.

[0018] The electric blower 23 is driven in response to an operation on the operation unit 22 provided on the handle 15. When the electric blower 23 is driven, a suction force acts inside the dust collector 17 and the connection pipe portion 20, and the dust-containing air is sucked from the connection port 29. The dust-containing air sucked into the connection port 29 passes through the connection pipe portion 20 and is taken into the inside of the dust collector 17. In the dust collector 17, dust is separated from the dust-containing air. The clean air discharged from the dust collector 17 passes through the electric blower 23. The clean air that has passed through the electric blower 23 is discharged to the outside of the main body 3 from the exhaust portion 21.

[0019] Next, the configuration of the dust collector 17 will be described. As shown in FIG. 3, the dust collector 17 includes, as main constituent members, a pre-filter 80, a filter 81, an inflow portion case 82, a partition member 83, a discharge portion 84, a conical portion 85, a partition wall portion 86, and a dust collection cup 87.

[0020] An inlet is formed in the inflow portion case 82. The inlet is an opening for allowing the dust-containing air to flow into the inside of the dust collector 17.

[0021] The filter 81 is detachably accommodated in a filter chamber 89 formed in the upper part inside the inflow portion case 82. The pre-filter 80 is disposed between the filter 81 and the partition member 83.

[0022] The partition member 83 is detachably accommodated below the pre-filter 80 and the filter 81 inside the inflow portion case 82. The partition member 83 is a member that partitions the filter chamber 89 and a turning portion 111 (described later) in a state where the dust collector 17 is properly assembled. Further, the partition member 83 is also a member for guiding the dust-containing air flowing in from the inlet of the inflow portion case 82 to the conical portion 85.

[0023] The partition member 83 includes a guide plate that is a part for guiding the dust-containing air flowing in from the inlet to the turning portion 111 (described later).

[0024] In a state where the dust collector 17 is properly assembled, an inflow air passage that communicates the inlet with the inside of the turning portion 111 is formed between the inflow portion case 82 and the partition member 83.

[0025] The conical portion 85 is a member that mainly forms the side wall of the swivel portion 111. The conical portion 85 is disposed below the partition member 83 when the dust collection device 17 is properly assembled. The swivel portion 111 is a chamber for swirling the dust-containing air flowing in from the inlet and centrifugally separating dust from the dust-containing air. The main part of the conical portion 85 has an inverted conical shape. A first opening 112 is formed in the side wall of the conical portion 85. A second opening 113 is formed at the bottom of the conical portion 85. Note that the bottom of the conical portion 85 corresponds to the apex portion of the aforementioned inverted conical shape. The first opening 112 and the second opening 113 are openings for discharging the dust centrifugally separated from the dust-containing air to the outside of the swivel portion 111.

[0026] The discharge portion 84 has a cylindrical or conical shape, or a shape combining a cylindrical shape and a conical shape. When the dust collection device 17 is properly assembled, the discharge portion 84 is disposed inside the conical portion 85. A plurality of fine holes are formed in a part of the lower side wall of the discharge portion 84. A discharge port 105 is formed at the upper end of the discharge portion 84. When the dust collection device 17 is properly assembled, the discharge port 105 of the discharge portion 84 is disposed at the center of the top surface portion of the partition member 83.

[0027] The dust collection cup 87 has a bottomed cylindrical shape. The dust collection cup 87 is disposed outside the conical portion 85 when the dust collection device 17 is properly assembled.

[0028] The space inside the dust collection cup 87 and outside the conical portion 85 is a dust collection chamber. The dust collection chamber is a space for collecting the dust centrifugally separated from the dust-containing air by the swivel portion 111. A partition portion 86 is disposed inside the dust collection cup 87 and outside the conical portion 85. The dust collection chamber is partitioned into two, namely, a first dust collection chamber 114 and a second dust collection chamber 115, by this partition portion 86. The first dust collection chamber 114 is disposed outside the second dust collection chamber 115. Therefore, the second dust collection chamber 115 is disposed inside the first dust collection chamber 114.

[0029] The first dust collection chamber 114 communicates with the swirling portion 111 through the first opening 112. The second dust collection chamber 115 communicates with the swirling portion 111 through the second opening 113. The first dust collection chamber 114 in this embodiment is an example of a dust collection chamber that is arranged to surround the outer periphery of the swirling portion 111 and communicates with the inside of the swirling portion 111 through the first opening 112 formed in the side wall of the swirling portion 111.

[0030] Note that the dust collection cup 87 may be made of a transparent material at least in part. By doing so, the visibility inside the dust collection cup 87 from the outside is excellent, and the accumulation amount of dust can be confirmed, so it is easy to grasp the timing of garbage disposal.

[0031] As described above, when the electric blower 23 of the main body 3 operates, a suction air flow is generated, and the dust-containing air is sucked into the dust collection device 17 from the connection port 29 and the connection pipe portion 20. At this time, the dust-containing air flows into the dust collection device 17 from the inlet. The dust-containing air that has passed through the inlet flows into the swirling portion 111 through the inflow air passage. At this time, the dust-containing air flows into the swirling portion 111 in the tangential direction or the circumferential direction along the inner surface of the conical portion 85, that is, the side wall forming the swirling portion 111.

[0032] The air that has flowed into the swirling portion 111 rotates in a preset swirling direction along the side wall of the swirling portion 111, forming a swirling air flow inside the swirling portion 111. This swirling air flow flows downward due to its path structure and gravity while forming a forced vortex region near the central axis and a free vortex region outside thereof.

[0033] Centrifugal force acts on the air inside the swirling portion 111, that is, the dust contained in the aforementioned swirling air flow. For example, relatively bulky dust α such as fiber dust and hair falls while being pressed against the cylindrical portion by the acting centrifugal force. Therefore, when the dust α reaches the height of the first opening 112, it passes through the first opening 112. The dust α that has passed through the first opening 112 is sent to the first dust collection chamber 114. A part of the swirling air flow also flows into the first dust collection chamber 114 together with the dust α. The inflowing air flow swirls inside the first dust collection chamber 114.

[0034] The dust that did not enter the first dust collection chamber 114 from the first opening 112 moves downward while swirling along with the airflow in the swirling section 111. Relatively small-sized dust β such as sand dust and fine fiber dust passes through the second opening 113. Then, the dust β falls into the second dust collection chamber 115 and is captured.

[0035] When the swirling airflow in the swirling section 111 reaches the lowermost part of the swirling section 111, its advancing direction changes upward and it rises along the central axis of the swirling section 111. Dust α and dust β are removed from the air forming this upward airflow. The clean air from which dust α and dust β have been removed flows out of the swirling section 111 through the fine openings of the discharge section 84. The air that has passed through the discharge section 84 flows into the filter chamber 89 from the discharge port 105. The air that has flowed into the filter chamber 89 passes through the filter 81 and is discharged outside the dust collection device 17.

[0036] After that, the clean air passes through the electric blower 23 in the outer shell portion 16. Then, the clean air is blown out from the exhaust portion 21 to the outside of the main body 3.

[0037] The dust collection device 17 of the present embodiment includes an umbrella-shaped protruding portion 120. The umbrella-shaped protruding portion 120 is provided in a predetermined angular range from below the first opening 112 toward the swirling direction of the airflow. The umbrella-shaped protruding portion 120 protrudes in an umbrella shape from the outer periphery of the conical portion 85 toward the bottom side of the first dust collection chamber 114. When the conical portion 85, the partition portion 86, and the dust collection cup 87 are assembled, the umbrella-shaped protruding portion 120 is provided to protrude from the inner peripheral wall of the first dust collection chamber 114 toward the outer peripheral side. The position where the umbrella-shaped protruding portion 120 is provided is on the bottom side of the first dust collection chamber 114 rather than the first opening 112. In particular, as shown in FIG. 6, the umbrella-shaped protruding portion 120 extends in the circumferential direction.

[0038] As shown in Fig. 4, the discharge part 84, the conical part 85, and the dust collection cup 87 all have a circular cross-section perpendicular to their respective central axes. And the central axes of the discharge part 84, the conical part 85, and the dust collection cup 87 are all arranged to be parallel. The central axes of the discharge part 84 and the conical part 85 coincide, but do not coincide with the central axis of the dust collection cup 87. Regarding the position in the swirling direction of the airflow, the first opening 112 is provided at the position where the distance from the inner wall surface of the dust collection cup 87 begins to widen. Thereby, dust is easily carried from the first opening 112 to the dust collection cup 87. As shown in Figs. 4 and 6, an umbrella-shaped protrusion 120 is provided in the range of about 230 degrees where the distance can be taken between the inner wall surface of the dust collection cup 87 and the outer wall surface of the swirling part 111 and below the first opening 112. The first opening 112 is provided on the starting point side of the umbrella-shaped protrusion 120 regarding the position in the clockwise direction which is the swirling direction when viewed from above. Also, the first opening 112 is formed in the upper side wall of the swirling part 111.

[0039] As shown in Figs. 3, 5, 6, and 8, a first rib 116 is provided outside the swirling part 111. The first rib 116 is arranged at a position adjacent to the first opening 112 on the side opposite to the swirling direction of the dust-containing air. As shown in Fig. 5, it is desirable that the first rib 116 is provided at a position where the distance D1 from the right end of the first opening 112 is within 10 mm when the first opening 112 is viewed from the front. The lower end of the first rib 116 is at the same position as the lower end of the umbrella-shaped protrusion 120. The first rib 116 is parallel to the axial direction of the dust collection cup 87 and the swirling part 111. Also, the first rib 116 is formed along the normal direction from the central axis of the swirling part 111 to the inner surface of the dust collection cup 87 when viewed from above. The first rib 116 is formed with a protrusion height that contacts the inner wall surface of the dust collection cup 87 or a protrusion height such that the clearance with the inner wall surface of the dust collection cup 87 is 0.2 mm or less. That is, the gap between the first rib 116 and the inner wall surface of the dust collection cup 87 is 0.2 mm or less.

[0040] In the dust collector 17 configured as described above, when the electric blower 23 of the main body 3 operates, the dust-containing air in the swivel unit 111 forms a swirling airflow. Then, centrifugal force acts on the dust in the swirling airflow, and the dust α is discharged from the first opening 112 into the first dust collection chamber 114. At this time, a part of the swirling airflow flows in from the first opening 112 together with the dust α and swirls within the first dust collection chamber 114.

[0041] The comparative example shown in FIG. 7 is an example without the first rib 116. In the comparative example of FIG. 7, the swirling flow that has flowed into the first dust collection chamber 114 from the first opening 112 makes one round and returns to the first opening 112, suppressing the airflow trying to exit from the first opening 112. In the comparative example of FIG. 7, the following occurs. Dust with a large specific gravity is carried from the first opening 112 to the first dust collection chamber 114 of the dust collection cup 87 by the centrifugal force generated in the swivel unit 111, and fine dust with a small specific gravity is carried from the second opening 113 provided below the swivel unit 111 to the second dust collection chamber 115. Fiber dust with a small specific gravity but not fine does not get carried to either dust collection chamber and stays within the swivel unit 111, causing dust clogging, or the fiber dust does not get carried to the dust collection chamber and gets caught at the first opening 112, or the original separation performance may not be exhibited. Furthermore, problems may occur when the user uses the vacuum cleaner, such as clogging of the filter caused by dust clogging within the swivel unit 111 or getting caught at the first opening 112, or the operation stop of the vacuum cleaner (locking by airtight detection) caused by filter clogging.

[0042] In contrast, in the present embodiment, as shown in FIG. 8, since the swirling flow that has flowed into the first dust collection chamber 114 from the first opening 112 and made a full circle hits the first rib 116 in front of the first opening 112 and is stopped, the wind trying to come out of the first opening 112 is not obstructed. That is, the first rib 116 prevents the wind that has exited the first opening 112, made a full circle in the first dust collection chamber 114, from returning from the first opening 112 to the swirling portion 111. As a result, the wind flowing from the first opening 112 to the dust collection cup 87 is not hindered by the returning wind, and the dust is surely carried to the dust collection cup 87. As a result, the clogging of fine but not very fine fiber dust with a small specific gravity in the swirling portion 111 or the snagging at the first opening 112 is eliminated, and the dust can be surely transported to the dust collection chamber, thereby reducing the above-mentioned problem. In addition, since the clogging of the filter also decreases, the frequency of filter cleaning also decreases, and the burden on the user can be reduced.

[0043] A part of the dust α that has entered the first dust collection chamber 114 moves from between the umbrella-shaped protruding portion 120 and the outer peripheral wall of the first dust collection chamber 114 to the bottom side of the umbrella-shaped protruding portion 120. Also, the dust α that could not pass through the gap between the umbrella-shaped protruding portion 120 and the outer peripheral wall of the first dust collection chamber 114 is carried by the airflow that has flowed into the first dust collection chamber 114 and moves upward of the umbrella-shaped protruding portion 120 in the above-mentioned swirling direction. Then, when it reaches the notch where the umbrella-shaped protruding portion 120 is not formed, the dust α passes through the notch and enters the bottom side of the umbrella-shaped protruding portion 120.

[0044] There is always an umbrella-shaped protruding portion 120 on the bottom side within the range of the first opening 112. Therefore, the umbrella-shaped protruding portion 120 can prevent the dust α on the bottom side of the first dust collection chamber 114 from returning from the first opening 112 into the swirling portion 111. That is, by providing such an umbrella-shaped protruding portion 120, the dust separated in the swirling portion 111 can be smoothly collected into the first dust collection chamber 114, and the backflow of the dust in the first dust collection chamber 114 into the swirling portion 111 can also be suppressed.

[0045] At least a part of the umbrella-shaped protrusion 120 is inclined so as to gradually approach the bottom of the first dust collection chamber 114 from the inner peripheral side to the outer peripheral side. In the configuration example described here, the side closer to the inner peripheral wall of the umbrella-shaped protrusion 120 is inclined in an umbrella shape. And, from the outer edge of the inclined portion of the umbrella-shaped protrusion 120, it extends straight toward the bottom of the first dust collection chamber 114. In this way, by inclining at least a part of the umbrella-shaped protrusion 120 in an umbrella shape, the dust in the first dust collection chamber 114 can be more smoothly collected on the bottom side than the umbrella-shaped protrusion 120. And, it is possible to further suppress the dust on the bottom side from the umbrella-shaped protrusion 120 from flying back to the first opening 112 side.

[0046] As described above, both the conical portion 85 and the dust collection cup 87 have a circular cross section perpendicular to their respective central axes. And, as shown in FIG. 4, the central axis O of the conical portion 85 and the central axis P of the dust collection cup 87 do not coincide. Therefore, the distance between the inner peripheral wall and the outer peripheral wall of the first dust collection chamber 114 is not constant.

[0047] Here, let the distance between the inner peripheral wall and the outer peripheral wall of the first dust collection chamber 114 on the side where the first opening 112 is disposed be the first interval. And, let the distance between the inner peripheral wall and the outer peripheral wall of the first dust collection chamber 114 on the side opposite to the first opening 112 as viewed from the turning portion 111 be the second interval. Then, the second interval is narrower than the first interval.

[0048] Further, the distance between the outer peripheral edge of the umbrella-shaped protrusion 120 and the outer peripheral wall of the first dust collection chamber 114 is constant. As described above, the dust collection cup 87 that constitutes the outer peripheral wall of the first dust collection chamber 114 has a circular cross-section perpendicular to the central axis. Therefore, the outer peripheral edge of the umbrella-shaped protrusion 120 is arc-shaped. And the central axis of the dust collection cup 87 coincides with the center of the arc of the umbrella-shaped protrusion 120. That is, as shown in FIG. 8, on the side where the first opening 112 with a relatively wide distance between the inner peripheral wall and the outer peripheral wall of the first dust collection chamber 114 is arranged, the radial width of the umbrella-shaped protrusion 120 is wide. And the radial width of the umbrella-shaped protrusion 120 becomes narrower as it moves away from the first opening 112. In this way, by making the distance between the outer peripheral edge of the umbrella-shaped protrusion 120 and the outer peripheral wall of the first dust collection chamber 114 constant and making the central axis of the umbrella-shaped protrusion 120 and the central axis of the dust collection cup 87 coaxial, a constant distance can be ensured between the inner surface of the dust collection cup 87 and the umbrella-shaped protrusion 120, and the return to the turning part 111 can be uniformly prevented.

[0049] Embodiment 2. Next, referring to FIGS. 9 and 10, Embodiment 2 will be described. The description will focus on the differences from Embodiment 1 described above, and the common descriptions will be simplified or omitted. Also, the same reference numerals will be given to the elements that are common or corresponding to the elements described above.

[0050] FIG. 9 is a perspective view of a member forming the turning part 111 of the dust collection device 17 according to Embodiment 2. FIG. 10 is a perspective view of the dust collection device 17 according to Embodiment 2.

[0051] As shown in FIG. 9, in the present embodiment, a second rib 117 is provided that protrudes from the lower end of the umbrella-shaped protrusion 120 toward the inner wall surface of the dust collection cup 87 at a position below the first opening 112. The second rib 117 is preferably provided in a range where the distance D2 from the right end of the first opening 112 is within 10 mm and the distance D3 from the left end of the first opening 112 is within 10 mm with respect to the circumferential position. The second rib 117 is formed with a protruding height that contacts the inner wall surface of the dust collection cup 87 or a protruding height such that the clearance from the inner wall surface of the dust collection cup 87 is 0.2 mm or less. That is, the gap between the second rib 117 and the inner wall surface of the dust collection cup 87 is 0.2 mm or less.

[0052] In the illustrated example, the right end of the second rib 117 is in contact with the lower end of the first rib 116.

[0053] As shown in FIG. 10, in the present embodiment, since the airflow that exits the first opening 112 and circulates around the first dust collection chamber 114 hits the first rib 116 and the second rib 117 and is blocked, it is possible to more reliably prevent the airflow from obstructing the wind that exits the first opening 112. As a result, the wind flowing from the first opening 112 to the dust collection cup 87 is not obstructed by the returning wind, and the dust is more reliably transported to the dust collection cup 87. As a result, dust clogging in the swirling portion 111 of fiber dust having a small specific gravity but not being fine or being caught at the first opening 112 is more reliably eliminated, and the dust can be more reliably transported to the dust collection chamber. In addition, since the clogging of the filter is more reliably reduced, the frequency of filter cleaning is also reduced, and the burden on the user can be reduced.

[0054] Embodiment 3. Next, referring to FIGS. 11 and 12, Embodiment 3 will be described. The description will focus on the differences from Embodiment 1 described above, and the common descriptions will be simplified or omitted. Also, the same reference numerals will be given to the elements that are common or corresponding to the elements described above.

[0055] FIG. 11 is a perspective view of the dust collector 17 according to Embodiment 3. FIG. 12 is a perspective view showing the dust collection cup 87 of the dust collector 17 according to Embodiment 3. As shown in these figures, in the present embodiment, instead of the first rib 116 in Embodiment 1, the first rib 118 is provided on the dust collection cup 87 side. The first rib 118 protrudes from the inner wall of the dust collection cup 87. In the present embodiment, by providing the first rib 118, the same effect as in Embodiment 1 can be obtained.

[0056] Embodiment 4. Next, referring to FIG. 13, Embodiment 4 will be described. The description will focus on the differences from Embodiment 2 described above, and the common descriptions will be simplified or omitted. Also, the same reference numerals will be given to the elements that are common or corresponding to the elements described above.

[0057] FIG. 13 is a side view of the member forming the turning part 111 in the dust collector 17 according to Embodiment 4. As shown in FIG. 13, in the present embodiment, the difference from Embodiment 2 is that the second rib 117 is formed obliquely. That is, the second rib 117 is inclined so as to approach the bottom of the dust collection cup 87 in the turning direction of the air flow.

[0058] In the present embodiment, the wind flowing from the first opening 112 to the dust collection cup 87 can be guided downward so as to go toward the bottom surface of the dust collection cup 87. Thereby, the dust returning from the first opening 112 to the turning part 111 can be more reliably suppressed, and the amount of dust adhering to the filter can be more reliably reduced.

[0059] Embodiment 5. Next, referring to FIGS. 14 and 15, Embodiment 5 will be described. The description will focus on the differences from Embodiment 4 described above, and the common descriptions will be simplified or omitted. Also, the same reference numerals will be given to the elements that are common or corresponding to the elements described above.

[0060] FIG. 14 is a perspective view of a member forming the turning part 111 in the dust collector 17 according to the fifth embodiment. FIG. 15 is a side view of a member forming the turning part 111 in the dust collector 17 according to the fifth embodiment.

[0061] As shown in FIGS. 14 and 15, in the present embodiment, it is different from the fourth embodiment in that a plurality of inclined second ribs 117 as in the fourth embodiment are provided. The plurality of second ribs 117 are arranged with their circumferential positions shifted.

[0062] In the present embodiment, the wind flowing from the first opening 112 to the dust collection cup 87 can be more reliably guided downward so as to go toward the bottom surface of the dust collection cup 87. Thereby, the dust returning from the first opening 112 to the turning part 111 can be more reliably suppressed, and the amount of dust adhering to the filter can be more reliably reduced.

[0063] Among the features of the above-described plurality of embodiments, two or more features that can be combined may be combined and implemented.

[0064] Hereinafter, aspects of the present disclosure will be summarized and described as appendices.

[0065] (Appendix 1) A blower that generates a suction wind, An electric vacuum cleaner including a dust collector that separates dust from the dust-containing air sucked by the suction wind, The dust collector includes A dust collection cup having a first dust collection chamber formed inside for storing dust, A turning part that turns the dust-containing air, A first opening formed in the upper side wall of the turning part for transporting dust to the first dust collection chamber, A first rib disposed at a position adjacent to the first opening on the side opposite to the turning direction of the dust-containing air, An electric vacuum cleaner provided with. (Appendix 2) The vacuum cleaner according to appended claim 1, comprising an umbrella-shaped protruding portion provided in a predetermined angular range from below the first opening portion toward the turning direction. (Appended claim 3) The vacuum cleaner according to appended claim 2, comprising a second rib protruding from the lower end portion of the umbrella-shaped protruding portion toward the inner wall surface of the dust collection cup at a position below the first opening portion. (Appended claim 4) The vacuum cleaner according to appended claim 3, wherein the second rib is inclined so as to approach the bottom of the dust collection cup in the turning direction. (Appended claim 5) The vacuum cleaner according to appended claim 3 or appended claim 4, comprising a plurality of the second ribs. (Appended claim 6) The vacuum cleaner according to any one of appended claims 1 to 5, wherein the first rib protrudes from the inner wall of the dust collection cup. (Appended claim 7) The vacuum cleaner according to any one of appended claims 1 to 6, wherein the first rib prevents the air that has exited the first opening portion, circled the first dust collection chamber, and returned from the first opening portion to the turning portion. (Appended claim 8) The central axis of the turning portion is provided at an eccentric position with respect to the central axis of the dust collection cup. The vacuum cleaner according to any one of appended claims 1 to 7, wherein the first opening portion is provided at a position where the distance between the turning portion and the inner wall surface of the dust collection cup begins to widen.

Explanation of reference signs

[0066] 1 Vacuum cleaner, 3 Main body, 4 Tube body, 5 Suction tool, 15 Handle, 16 Outer shell, 17 Dust collection device, 20 Connection pipe section, 21 Exhaust section, 22 Operation section, 23 Electric blower, 29 Connection port, 80 Prefilter, 81 Filter, 82 Inflow section case, 83 Partition member, 84 Discharge section, 85 Conical section, 86 Partition wall section, 87 Dust collection cup, 89 Filter chamber, 105 Discharge port, 111 Swivel section, 112 First opening, 113 Second opening, 114 First dust collection chamber, 115 Second dust collection chamber, 116 First rib, 117 Second rib, 118 First rib, 120 Umbrella-shaped protrusion

Claims

1. A blower that generates suction air; and a dust collecting device that separates dust from the dust-containing air sucked by the suction wind, The dust collecting device includes: a dust collecting cup having a first dust collecting chamber formed therein for collecting dust; a swirling section for swirling the dust-containing air; a first opening formed in a side wall of an upper portion of the swirl portion for conveying dust to the first dust collecting chamber; a first rib arranged adjacent to the first opening on a side opposite to the swirling direction of the dust-containing air; A vacuum cleaner equipped with

2. The electric vacuum cleaner according to claim 1 , further comprising an umbrella-shaped protrusion provided within a predetermined angular range from below the first opening toward the swiveling direction.

3. The electric vacuum cleaner according to claim 2 , further comprising a second rib protruding from a lower end of the umbrella-shaped projection toward an inner wall surface of the dust cup at a position below the first opening.

4. The electric vacuum cleaner according to claim 3 , wherein the second rib is inclined toward the rotation direction so as to approach a bottom portion of the dust cup.

5. The vacuum cleaner according to claim 3 or 4, comprising a plurality of the second ribs.

6. The vacuum cleaner according to claim 1 , wherein the first rib protrudes from an inner wall of the dust cup.

7. The electric vacuum cleaner according to any one of claims 1 to 4, wherein the first rib prevents wind that has left the first opening and made a circuit around the first dust collecting chamber from returning from the first opening to the swirl section.

8. The central axis of the swivel unit is provided at a position eccentric to the central axis of the dust collecting cup, The vacuum cleaner according to claim 1 , wherein the first opening is provided at a position where a distance between the swiveling portion and an inner wall surface of the dust cup begins to increase.

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