JP2017158805A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner, a first separation portion of the dust collector of which is improved in the dust separation performance.SOLUTION: The dust collector comprises a first separation portion 43 for centrifuging dust from dust-containing air sucked by driving an electric blower. A first separation portion 43 includes a cup portion 51, an inner cylinder portion 71, and a cylindrical shade portion 72. The inner cylinder portion 71 is located inside the cup portion 51 and forms an air passage 77 for turning the dust-containing air between an outer surface 71a and an inner surface 51a of the cup portion 51. The inner cylinder portion 71 includes an opening 75 through which a part of the dust-containing air passes to the suction side of the electric blower. The shade portion 72 is provided at a lower end portion of the inner cylinder portion 71 and has a downwardly oriented opening with a larger diameter than the inner cylinder portion 71. The shade part 72 defines a first dust collecting part for collecting the dust in the bottom section of the air passage 77 in the cup portion 51. The shade portion 72 includes a ventilation opening 83 for permitting the inner air to obliquely pass to the air passage 77 toward the inner surface 51a side of the cup portion 51.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to a vacuum cleaner provided with a dust collecting device having a centrifugal separator that centrifuges dust from dust-containing air sucked by driving of an electric blower.

  2. Description of the Related Art Conventionally, as a dust collector used in, for example, an electric blower, a so-called cyclone separation type that centrifuges dust (cyclone separation) by rotating dust-containing air inside is known. Such a cyclone separation type dust collector is a cylindrical inner cylinder portion provided on the inner side of a bottomed cylindrical cup portion, and a cylindrical inner diameter portion provided at the lower end portion of the inner cylinder portion. The shade portion is disposed concentrically with the cup portion, and forms an air passage for swirling dust-containing air sucked by driving of the electric blower between the inner peripheral surface of the cup portion and the outer peripheral surface of the inner cylinder portion. A centrifuge is provided. Then, the dust is centrifuged from the dust-containing air swirled in the air passage, falls along the inner peripheral surface of the cup part, and is stored in the bottom part of the cup part, and the air from which the dust is separated becomes the inner cylinder part. It passes through the filter arranged in the opening part opened in the peripheral surface of this and goes downstream.

  In addition, the shade portion includes a ventilation opening and a compression filter attached to the ventilation opening, and dust accumulated in the bottom of the cup portion by allowing a part of the air from the air passage to pass through the ventilation opening. Is compressed inside the shade part.

  However, the air that has passed through the ventilation opening of the shade portion may be sucked as it is into the opening located directly above, so that particularly fine dust may not be sufficiently separated in the centrifugal separation portion. A configuration is separately required on the downstream side of the centrifuge.

JP 2014-14654 A

  Problem to be solved by the invention is providing the vacuum cleaner which improved the separation performance of the dust in the centrifuge part of a dust collector.

  The vacuum cleaner of an embodiment has a main body case provided with an electric blower, and a dust collector provided in the main body case. The dust collector includes a centrifuge that centrifuges dust from dust-containing air sucked by driving of the electric blower. The centrifuge has a cup part, a cylindrical inner cylinder part, and a cylindrical shade part. An inner cylinder part is located inside a cup part, and forms the wind path which turns dust-containing air between an outer surface and the inner surface of this cup part. Moreover, an inner cylinder part is provided with the opening which allows a part of dust-containing air to pass to the suction side of an electric blower. A shade part is provided in the lower end part of an inner cylinder part, is expanded rather than an inner cylinder part, and opens below. The shade part defines a reservoir part for collecting dust in the cup part below the air passage. And a shade part is equipped with the ventilation | gas_flowing opening which passes inner air toward the inner surface side of a cup part in an inclined shape to an air path.

It is sectional drawing which expands and shows a part of dust collector of the vacuum cleaner of one Embodiment. It is sectional drawing of a dust collector same as the above. (a) is a perspective view showing a part of the same dust collector, (b) is a plan view showing a shade portion of the dust collector. It is a perspective view which shows the main body case of a vacuum cleaner same as the above. It is a perspective view of a vacuum cleaner same as the above.

  The configuration of one embodiment will be described below with reference to FIGS.

  In FIG. 5, reference numeral 11 denotes a so-called canister type vacuum cleaner. The vacuum cleaner 11 includes a pipe portion 12 that is an air passage forming body, and a vacuum cleaner body 13 to which the pipe portion 12 is detachably connected. have.

  The pipe part 12 is provided on the distal end side of the hose body 16, the connecting pipe part 15 connected to the cleaner body 13, the flexible hose body 16 communicating with the distal end side of the connecting pipe part 15. The hand operating section 17, the extension pipe 18 detachably connected to the distal end side of the hand operating section 17, and the floor brush 19 as a suction port body detachably connected to the distal end side of the extension pipe 18 and the like And.

  For example, a loop-shaped gripping portion 21 protrudes toward the hose body 16 on the hand operating portion 17, and a plurality of setting buttons 22 for operation setting are provided on the gripping portion 21.

  The vacuum cleaner body 13 includes a main body case 26 having large-diameter traveling wheels 23 on both sides and a swiveling wheel (not shown) at the lower portion. A certain dust collector 27 is detachable. The cleaner body 13 is configured to be able to travel (move) at least along the front-rear direction on the floor surface as a surface to be cleaned by the traveling wheels 23 and the turning wheels. Hereinafter, the front-rear direction and the left-right direction are based on the traveling (moving) direction of the cleaner body 13 (main body case 26).

  The main body case 26 is made of, for example, a synthetic resin, and supports a main body 31 located behind the dust collector 27 and a lower part of the front of the main body 31 to support the lower portion of the dust collector 27. And a protrusion receiving portion 32 as a dust collector supporting portion. Inside the main body case 26, a main body air passage portion (not shown) bent in an L shape in a side view is disposed across the main body portion 31 and the protruding receiving portion 32.

  The traveling wheels 23 are rotatably supported on both sides of the main body 31. Further, on the upper side of the front portion of the main body 31, for example, a loop-shaped handle 34 for gripping the cleaner main body 13 (main body case 26) protrudes in an inclined manner toward the rear. In addition, inside the main body 31, an electric blower 35, a control circuit unit (not shown) that controls the operation of the electric blower 35, a cord reel device that can supply power to the electric blower 35, etc., or a battery A power supply unit is housed.

  As shown in FIG. 4, the front portion of the main body 31 is connected to the suction side of the electric blower 35 and is airtightly connected to the downstream side of the dust collector 27 (FIG. 2) attached to the main body case 26. The air intake opening 38 and the communication opening 39 that is airtightly connected to the upstream side of the dust collector 27 are formed so as to be positioned vertically. A plurality of exhaust holes (not shown) for discharging the exhaust from the electric blower 35 to the outside of the main body case 26 are formed at the rear of the main body 31.

  A main body suction port 40 to which the connecting pipe portion 15 of the pipe portion 12 shown in FIG. 5 is connected is formed on the front surface of the protrusion receiving portion 32, and the main body suction port 40 is an opening at the upstream end of the main body air passage portion. It has become. Therefore, the main body suction port 40 communicates with the communication opening 39 (FIG. 4) through the main body air passage, and can communicate with the upstream side of the dust collector 27 through the communication opening 39 (FIG. 4). It has become.

  The operation of the electric blower 35 is controlled by the control circuit unit according to the operation of the setting button 22.

  On the other hand, the dust collecting device 27 shown in FIG. 2 has an inlet 42 through which dust-containing air is introduced in a wind path, and a first separator (first centrifugal separator) serving as a centrifugal separator communicating with the inlet 42. Part) 43, a wind guide part 44 for guiding the air that has passed through the first separation part 43, and a plurality of second separations as downstream centrifugal separation parts (fine dust centrifugal separation parts) communicating with the wind guide part 44 Section (second centrifuge section) 45, an air passage section 46 for guiding the air that has passed through the second separation section 45, and a discharge port 47 that constitutes a downstream end of the air passage section 46 and discharges air. I have. The dust collector 27 separates the coarse dust D1, which is relatively large dust, and a part of the fine dust D2, which is relatively small dust, from the dust-containing air introduced from the introduction port 42 by the first separation unit 43. Then, the dust-containing air that has passed through the first separation part 43 is guided to the second separation part 45 by the air guide part 44 in a substantially uniform manner, and the remaining fine dust D2 is separated by the second separation part 45. The air from which the dust has been separated is discharged from the air passage portion 46 to the outside (the suction side of the electric blower 35) through the discharge port 47.

  Further, the dust collector 27 is structurally provided with a bottomed cylindrical cup portion 51 as a first main body portion and a separation main body portion 52 as a second main body portion in a detachable manner. The dust collector 27 is fixed by being fitted to the front portion of the main body 31 on the rear side in a state where the dust collector 27 is attached to the main body case 26. Hereinafter, in the dust collector 27, the vertical direction means one end side and the other end side in the axial direction of the dust collector 27 (an upper side that is one end side of the one-dot chain line L in FIG. Side). That is, the vertical direction in the dust collector 27 is based on the vertical direction in the state of the dust collector 27 alone, and the vertical direction of the dust collector 27 in the state of being attached to the main body case 26 is not necessarily the same. It may not match.

  The cup part 51 is integrally provided with a bottomed cylindrical cup body part 54 and a partition part 55 that is continuous with an upper end part that is one end part of the cup body part 54.

  The cup body portion 54 is formed of a member such as a transparent (transparent) synthetic resin, for example, and the first dust collecting portion 57 as a reservoir section partitioned inside can be visually observed from the outside. Yes. Further, at the rear part of the cup main body portion 54, a rectangular tube-shaped introduction port partitioning portion 58 that partitions the introduction port 42 is projected. Further, a dust collector handle portion 59 (FIG. 5) for gripping the dust collector 27 (cup portion 51) protrudes from the cup body portion 54.

  The first dust collection unit 57 mainly collects the coarse dust D1 separated by the first separation unit 43 and also collects a part of the fine dust D2 entangled with the coarse dust D1. The first dust collecting portion 57 is located on the lower side in the cup portion 51.

  The partition part 55 is expanded in diameter relative to the cup body part 54. Further, the partition part 55 partitions a dust disposal port 61 for discarding the dust in the cup part 51 on the inner periphery on the upper end side. The partition portion 55 includes a second dust collecting portion 62 for collecting fine dust D2 separated by each second separation portion 45 by pressing the separation main body portion 52 side attached to the cup portion 51 inside. It can be partitioned from the separation main body 52. That is, the second dust collecting unit 62 is positioned around the upper side of the first separating unit 43 and outside the air flow path that passes through the dust collecting device 27. The second dust collecting part 62 communicates with the first dust collecting part 57 by removing the separation main body part 52 from the cup part 51, and the fine dust D2 collected inside falls to the first dust collecting part 57. It is supposed to let you.

  On the other hand, the separation main body 52 is inserted into the cup portion 51 to form the first separation portion 43 between the cup portion 51 and the air guide portion 44 positioned above the insertion portion 64. The main body 65 includes the second separation portion 45 and the air passage portion 46 therein, and the wall portion 66 projects downward from the lower end portion of the main body 65 at a position around the insertion portion 64. . A dust collector clamp 67 as a locking device for locking the dust collector 27 to the main body case 26 is provided over the upper portion and the rear portion of the main body 65.

  The insertion part 64 is an inner cylinder part 71 as a substantially cylindrical cylindrical part, and a synthetic resin that is a compression part that is coaxially arranged on the lower end side of the inner cylinder part 71 and can be attached to and detached from the inner cylinder part 71. And a shade portion 72 made of metal. And this 1st separation part 43 is arranged coaxially with this cup part 51 in the central part in cup main part 54 of cup part 51 in the state where separation main part 52 was attached to cup part 51, and it is the up-and-down direction. Has an axial direction along.

  The inner cylinder portion 71 includes a plurality of openings 75 communicating with the air guide portion 44 in the circumferential direction, and the entire opening 75 is covered with, for example, a mesh-like separation filter 76. Further, the outer surface (outer peripheral surface) 71a of the inner cylindrical portion 71 is between the inner surface (inner peripheral surface) 51a of the cup portion 51 (cup main body portion 54) with the separation main body portion 52 attached to the cup portion 51. The air passage 77 for turning the dust-containing air is defined. A lower frame portion 78 as a cylindrical end frame portion is formed at the lower end portion of the inner cylinder portion 71 adjacent to the shade portion 72 and positioned below the opening 75. That is, the lower frame portion 78 of the inner cylinder portion 71 is a non-opening portion that does not include the opening 75.

  The air passage 77 is located on the upper side in the cup portion 51. That is, the air passage 77 is located above the first dust collecting portion 57.

  The shade part 72 divides the inside of the cup part 51 (cup body part 54) into an upper air passage 77 and a lower first dust collecting part 57 in the vertical direction, and generates negative pressure generated by driving the electric blower 35. It is used to compress dust. The shade portion 72 has a circular top plate portion 81 that closes the lower end portion of the inner tube portion 71 and projects in a radial shape from the periphery of the inner tube portion 71, and an outer surface of the top plate portion 81. It integrally has a peripheral plate portion 82 that protrudes downward from the peripheral edge in the opposite direction to the inner cylinder portion 71, and opens downward. Therefore, the shade portion 72 has a larger diameter than the inner cylinder portion 71, and protrudes (enlarges (expands)) in the radial direction with respect to the inner cylinder portion 71 in a state of being attached to the inner cylinder portion 71. In addition, the diameter is smaller than that of the cup part 51 (cup body part 54). The shade portion 72 is spaced upward from the bottom portion of the cup portion 51. The shade portion 72 may be detachable from the inner cylinder portion 71.

  Further, as shown in FIG. 1, the shade portion 72 includes a plurality of ventilation openings 83. These ventilation openings 83 are provided so as to penetrate the top plate portion 81 in the thickness direction. That is, the ventilation openings 83 are located outward from the outer periphery of the inner cylinder portion 71. Further, the ventilation openings 83 are formed to be inclined with respect to the axial direction of the shade portion 72 (insertion portion 64). The inclination of the ventilation openings 83 is outward from the lower side to the upper side, that is, in a direction toward the inner surface 51a of the cup part 51, in other words, a direction away from the inner cylinder part 71. For this reason, these ventilation openings 83 are configured to allow air inside the shade portion 72 to pass through the air passage 77 toward the inner surface 51a of the cup portion 51 (in a direction away from the inner cylinder portion 71). Has been.

  Here, each ventilation opening 83 is formed along a direction in which a cylindrical pin or the like protruding into a cavity of a molding die for molding the shade portion 72 is inclined with respect to the top plate portion 81 when the shade portion 72 is molded. It is formed by arranging. Therefore, the upper end portion and the lower end portion of each ventilation opening 83 have an elliptical shape having a major axis along the radial direction of the shade portion 72, respectively. Further, in the present embodiment, the ventilation openings 83 are provided with a plurality of ventilation openings 83 that are inclined in the same direction in each of the plurality of regions of the top plate portion 81. That is, in the shade portion 72, a plurality of (for example, four) ventilation regions 84 arranged at substantially equal intervals in the circumferential direction are set on the top plate portion 81 (FIGS. 3A and 3B). For each of these ventilation regions 84, a plurality of ventilation openings 83 inclined in the same direction are arranged. The ventilation opening 83 is spaced apart from the lower end portion of the inner cylindrical portion 71, that is, the lower frame portion 78 in the radial direction of the shade portion 72, and is disposed closer to the outer side of the shade portion 72. The top plate portion 81 between the lower end portion (the lower frame portion 78) is a non-venting region 85 having no ventilation opening 83.

  2 includes a partition wall portion 86 that partitions the air guide portion 44, a separation portion partition portion 87 that partitions the second separation portion 45, and an air passage portion partition portion that partitions the air passage portion 46. With 88.

  The partition wall portion 86 is located inward of the second separation portion 45 (separation portion partition portion 87), that is, on the center side in the radial direction. That is, the air guide portion 44 is located inside the second separation portion 45. The partition wall portion 86 is formed to have a reduced diameter from the lower end side to the upper end side, and restricts the air passage area of the air guide portion 44 from the upstream side to the downstream side.

  The separation section partition section 87 includes a cone section 91 that constitutes the lower end side of the second separation section 45 and a turning section 92 that constitutes the upper end side of the second separation section 45.

  The cone portion 91 has an axial direction along the vertical direction, and is formed in a cylindrical shape (a truncated cone shape) whose diameter is reduced from the upper end side to the lower end side.

  The turning portion 92 is provided so as to cover the upper end portion of the cone portion 91. The swivel part 92 is a part for introducing dust-containing air into the cone part 91, and is connected in parallel to the air guide part 44, respectively. In addition, an elongated cylindrical exhaust part 93 is integrally provided on the central axis of the swivel part 92. The exhaust section 93 communicates with the inside of the cone section 91 and is connected to the air passage section section 88, and is configured to discharge the exhaust from the second separation section 45 to the air passage section 46.

  Then, the separating section section 87 has a central axis positioned on, for example, a C-shaped virtual arc located on a plane that intersects (orthogonally) the central axis with the central axis of the separating main body 52 as the center. Each is arranged. Therefore, the second separation portion 45 is arranged in an arc shape at a position excluding the rear central region in the left-right direction.

  The air passage section section 88 extends from above the separating section section 87 to the inside of the partition wall section 86, and has a substantially double tube structure with the partition wall section 86. Therefore, a part of the air passage portion 46 is partitioned inside the air guide portion 44. Further, the air passage section 88 is formed in a cylindrical shape with the rear end side facing rearward, and is exposed from the separation section sections 87 and 87 (between the second separation sections 45 and 45) located at the rearmost portion. The rear end is a discharge port 47.

  The wall portion 66 is inclined outward and downward, and the upper portion faces the lower end portion of the cone portion 91. A seal member 94 is attached to the tip of the wall portion 66. The seal member 94 is pressed against the partition portion 55 in a state where the separation main body portion 52 is attached to the cup portion 51 so as to partition the second dust collection portion 62 in a circumferential shape (arc shape).

  The dust collector clamp 67 is operated by operating the operation handle 96 located at the upper part of the separation main body 52 (dust collector 27) and the operation handle 96 located above the rear of the separation main body 52. And a locking claw portion 97 as an operating locking portion.

  When the dust collecting device 27 is attached to the main body case 26 (FIG. 4), the locking claw portion 97 is provided with a locking receiver opened above the intake opening 38 at the front of the main body portion 31 of the main body case 26. The dust collecting device 27 is locked to the main body case 26 (FIG. 4) by being inserted into and engaged with a locking opening 98 (FIG. 4) as a part, and is urged toward the rearward direction. The operation handle portion 96 is lifted and operated to move forward against the urging force.

  Next, the cleaning operation according to the embodiment will be described with reference to FIGS.

  When cleaning is started, the dust collector 27 is attached to the main body case 26. That is, the dust collector 27 is placed and supported on the protrusion receiving portion 32 of the main body case 26, and the locking claw portion 97 of the dust collector clamp 67 is inserted and locked into the locking opening 98 of the main body case 26. As a result, the dust collector 27 is locked to the main body case 26. As a result, in the dust collector 27, the lower end portion (the other end portion) of the cup body portion 54 of the cup portion 51 is supported from below by the protruding receiving portion 32. Further, the inlet 42 and the outlet 47 are airtightly connected to the communication opening 39 and the intake opening 38 of the main body case 26, respectively, and the dust collector 27 is disposed between the suction side of the electric blower 35 and the main body suction port 40. The main body case 26 is mounted in an airtight connection. As a result, the dust collector 27 is positioned in a state where the axial direction is along the vertical direction. Note that when the dust collector 27 is already attached to the main body case 26, these operations are not necessary.

  In this state, the pipe part 12 is connected to the main body suction port 40 of the cleaner main body 13 (main body case 26). Specifically, the pipe part 12 inserts and connects the connection pipe part 15 to the main body suction port 40, and sequentially connects the extension pipe 18 and the floor brush 19 to the distal end side of the hand operation part 17 as necessary. In this state, the setting button 22 of the hand operation unit 17 is electrically connected to a control circuit unit in the cleaner body 13 (main body case 26) and the like. In addition, when the pipe part 12 is already connected to the cleaner body 13, these operations are unnecessary.

  Then, after the user pulls out the power cord from the cord outlet and connects it to an outlet such as a wall surface, the user grips the gripping part 21 and operates the desired setting button 22 to set the operation mode of the electric blower 35. To do. The control circuit unit controls the input of the electric blower 35 corresponding to the set operation mode, and starts the electric blower 35 in the set operation mode.

  The negative pressure generated by the activation of the electric blower 35 is the intake opening 38, the discharge port 47, the air passage 46, the second separation part 45, the air guide part 44, the first separation part 43, and the first dust collection part 57. In addition, it acts on the pipe portion 12 through the introduction port 42, the communication opening 39, the main body air passage portion, and the main body suction port 40.

  The user sucks dust together with air from the front end side of the floor brush 19, the extension pipe 18, or the hand operation unit 17 by the action of the negative pressure.

  The dust-containing air, that is, the dust-containing air, is guided from the pipe portion 12 to the introduction port 42 via the main body suction port 40, the main body air passage unit, and the communication opening 39, and the dust collector is provided from the introduction port 42. The 27 cup parts 51 are sucked into the cup body part 54.

  In the cup body portion 54, the dust-containing air swirls in the air passage 77, so that particularly coarse dust D1 in the dust-containing air is centrifuged and falls along the inner surface 51a of the cup portion 51 to be first collected. Accumulated in the dust part 57. The coarse dust D1 is carried from the air passage 77 to the shade portion 72 by a part of the flow of the dust-containing air, and the dust-containing air passes along the ventilation openings 83 of the shade portion 72, thereby causing the shade It is compressed in the section 72. At this time, since each ventilation opening 83 is inclined outward from the lower end side to the upper end side, the air that has passed through the ventilation opening 83 from the inside of the shade portion 72 is joined to the air passage 77 again. Thus, before passing through the opening 75, it repeatedly passes through the ventilation opening 83 (FIG. 1). For this reason, the coarse dust D1 itself compressed in the shade part 72 becomes a filter, and a part of the fine dust D2 contained in the dust-containing air passing through the ventilation opening 83 is entangled and removed from the coarse dust D1, and the first collection is performed. Accumulated in the dust part 57.

  The dust-containing air from which part of the coarse dust D1 and fine dust D2 has been separated is filtered by the separation filter 76 when passing through the opening 75 of the inner cylinder portion 71. Further, the dust-containing air that has passed through the separation filter 76 is carried to the air guide section 44. The dust-containing air is rectified by gradually reducing the flow rate in the air guide section 44, and then flows into the second separation sections 45 by branching.

  In these second separation portions 45, the dust-containing air is swirled along the inner peripheral surface, the fine dust D2 in the dust-containing air is centrifuged, falls along the cone portion 91, and the inclination of the wall portion 66 Is led to the second dust collecting part 62 and stored.

  Then, the substantially dust-free air from which the fine dust D2 is centrifuged is exhausted from the central portion of each second separation portion 45 to the air passage portion 46 and merged. It is guided rearward while being squeezed and exhausted from the outlet 47 to the outside of the dust collector 27.

  Thereafter, the air passes through the intake opening 38 and is then sucked into the electric blower 35, passes through the electric blower 35 while cooling, and becomes exhausted air, and is discharged from the electric blower 35 through the exhaust hole. The air is exhausted to the outside of the main body case 26.

  When the cleaning is completed, the user operates the predetermined setting button 22 so that the control circuit unit decreases the input of the electric blower 35 and stops the electric blower 35.

  When a certain amount of dust accumulates in the dust collector 27, the user lifts the operation handle portion 96 of the dust collector clamp 67 to retract the locking claw portion 97 from the locking opening 98, The dust collector 27 is removed from the main body case 26, and the separation main body 52 is removed from the cup 51. As a result, the seal member 94 is released from close contact with the partition part 55, and the fine dust D2 stored in the second dust collection part 62 drops and moves to the first dust collection part 57 inside the cup body part 54. Then, the dust falls on the upper side of the coarse dust D1 stored in the first dust collecting portion 57 and is mixed with the coarse dust D1.

  After this, the user grips the dust collector handle 59 and carries the cup 51 to a disposal position such as a trash can, and then turns the upper side to tilt downward so that the cup 51 is compressed. Coarse dust D1 accumulated in the state and fine dust D2 mixed with the coarse dust D1 are simultaneously discarded from the dust disposal port 61.

  According to the embodiment described above, air is repeatedly circulated from the air passage 77 to the inside of the shade portion 72 through the ventilation opening 83, and not only the coarse dust D1 but also the fine dust D2 in the first separation portion 43. Therefore, the separation efficiency in the first separation unit 43 can be improved.

  Further, by providing the second separation unit 45 for centrifuging the dust that has not been separated by the first separation unit 43 from the air that has passed through the first separation unit 43, the fine dust D2 temporarily suspends the first separation unit 43. Even if it passes, it can be separated and collected in the second separation unit 45.

  Furthermore, the lower end portion of the inner cylinder portion 71 adjacent to the shade portion 72 is a lower frame portion 78 that is a non-opening portion that does not include the opening 75, so that the air that has passed through the ventilation opening 83 merges into the air passage 77. At this time, it is difficult to be drawn into the opening 75, and the air passage 77 can be circulated more efficiently.

  Similarly, by providing a non-venting region 85 at a position on the inner peripheral side of the shade portion 72 adjacent to the lower end portion of the inner cylindrical portion 71, by separating the ventilation opening 83 from the lower frame portion 78 of the inner cylindrical portion 71, When the air that has passed through the ventilation opening 83 joins the air passage 77, it is difficult to be drawn into the opening 75, and the air can be circulated to the air passage 77 more efficiently.

  Further, the ventilation openings 83 can be gathered in a plurality of ventilation regions 84 so as to be inclined in the same direction, so that the sliding directions of the pins of the molding die when the ventilation openings 83 are formed in the shade part 72 can be collected. And productivity can be improved.

  Further, by improving the dust separation efficiency in the first separation part 43, it is possible to reduce the load caused by the separation of dust in the second separation part 45, and to simplify the second separation part 45 or to perform the second separation. It is possible to suppress a decrease in suction efficiency due to the portion 45.

  In the above embodiment, the second separation unit 45 may be a filter that filters the fine dust D2 from the dust-containing air, or the first separation unit 43 and the separation filter 76 reliably remove the coarse dust D1 and the fine dust D2. If it can be separated, it is not necessary to provide it.

  Further, the ventilation openings 83 may be opened so as to incline along the radial direction of the shade portion 72, respectively.

  The vacuum cleaner 11 is not limited to the canister type, and is an upright type vacuum cleaner in which the floor brush 19 is connected to the lower portion of the vertical vacuum cleaner body 13 in the vertical direction, and an extension pipe for the vacuum cleaner body 13. A stick type vacuum cleaner that connects the floor brush 19 via 18 or an autonomous traveling type vacuum cleaner (robot cleaner) that cleans the floor surface while traveling autonomously can also be applied.

  Although one embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Vacuum cleaner
26 Main unit case
27 Dust collector
35 Electric blower
43 First separator as centrifuge
45 Second separator as downstream centrifuge
51 Cup
51a Inner surface
57 1st dust collector as reservoir
71 Inner tube
71a exterior
72 Shade section
75 opening
77 Wind
78 Lower frame that is not open
83 Ventilation opening

Claims (3)

A body case equipped with an electric blower;
A dust collector provided in the main body case;
The dust collector includes a centrifuge that centrifuges dust from dust-containing air sucked by driving the electric blower,
The centrifuge is
A cup part,
Located inside the cup part, it forms an air passage for swirling the dust-containing air between the outer surface and the inner surface of the cup part, and passes a part of the dust-containing air to the suction side of the electric blower A cylindrical inner cylinder with an opening to be
A cylindrical shade portion that is provided at a lower end portion of the inner cylinder portion, is expanded from the inner cylinder portion, opens downward, and divides a reservoir portion that accumulates dust below the air passage in the cup portion; Have
The said shade part is equipped with the ventilation opening which allows inner air to incline toward the said inner surface side of the said cup part to the said air path. The vacuum cleaner characterized by the above-mentioned. The vacuum cleaner according to claim 1, wherein the dust collecting device includes a downstream centrifugal separation unit that centrifuges the dust that has not been separated by the centrifugal separation unit from the air that has passed through the centrifugal separation unit. . The vacuum cleaner according to claim 1 or 2, wherein the inner cylinder portion includes a non-opening portion that does not include an opening at a lower end portion adjacent to the shade portion.

Images