JPWO2018146944A1 - Electric vacuum cleaner - Google Patents

Abstract

The vacuum cleaner includes a dust collector (8). The dust collector (8) is a first separation unit that separates coarse dust from dust with a case upper part (37) that sucks air containing dust and generates a swirling airflow, and a filtration filter (36) having a ventilation hole. (33). The dust collector (8) is located on the outer peripheral side of the coarse dust container (38) for accommodating coarse dust and the first separation part (33), and is connected to the outer peripheral suction passage (via the filtration filter (36)). 41). The dust collector (8) communicates with the outer peripheral suction passage (41), and a second centrifugal separator (56) for centrifuging fine dust from air from which coarse dust has been separated, and a fine dust reservoir for collecting fine dust (57). This provides an easy-to-use vacuum cleaner that separates and collects dust.

Description

  The present invention relates to an electric vacuum cleaner that collects dust in a plurality of separation portions.

  2. Description of the Related Art Conventionally, there is a vacuum cleaner that includes a first centrifugal separation unit located on the upstream side of the air flow and a second centrifugal separation unit having a plurality of swivel cylinders located on the downstream side (for example, Patent Document 1). reference).

  The conventional vacuum cleaner described in Patent Document 1 is configured such that the second centrifugal separator is located above the first centrifugal separator and outside the outer periphery of the inner cylinder of the first centrifugal separator. Is done.

  However, in the structure of the conventional vacuum cleaner, the usability is not good as described below.

  For example, fine long dust such as hair is entangled with the filter portion, and the dust adheres to the filter portion and is laminated. Therefore, the filter part may be clogged, and the user may have to remove dust from the filter part. In addition, when dust is thrown away, coarse dust or fine dust may rise and be scattered around.

Japanese Patent No. 5368645

  The vacuum cleaner of the present invention includes at least a dust collector. The dust collector is disposed below the upper part of the case having a substantially cylindrical side wall that sucks dust-containing air from the intake port and generates a swirling airflow, and has a vent hole on the side peripheral surface. A substantially cylindrical filtration filter having a first separation part for separating coarse dust from air containing dust. In addition, the dust collector is disposed below the first separation unit and in the vicinity of the filtration filter, and on the outer peripheral side of the first separation unit and the coarse dust storage unit that stores the coarse dust separated by the first separation unit. An outer peripheral suction passage that is located and communicates with the first separation portion via a filtration filter. Further, the dust collector is disposed above the upper part of the case, communicates with the outer peripheral suction passage, and centrifuges at the second centrifuge unit for centrifuging fine dust from air from which coarse dust has been separated, and at the second centrifuge unit. A fine dust reservoir for collecting fine dust.

  According to this configuration, due to the configuration of the dust collector, the sucked coarse dust turns to form a lump. Therefore, it is easy to discharge dust, and clogging of the filtration filter and rising of dust can be reduced. Thereby, the vacuum cleaner improved in usability can be provided.

FIG. 1 is an overall perspective view of the electric vacuum cleaner according to the embodiment of the present invention. FIG. 2 is a schematic view of a central cross section of the vacuum cleaner body of the electric vacuum cleaner. FIG. 3 is an overall perspective view of the dust collector of the electric vacuum cleaner. FIG. 4 is a schematic diagram of a cross section of the dust collecting device of the electric vacuum cleaner. FIG. 5A is a schematic plan view showing the behavior of the swirling airflow and dust in the dust collector of the electric vacuum cleaner. FIG. 5B is a schematic perspective view illustrating the behavior of a swirling airflow and dust in the dust collector of the electric vacuum cleaner. FIG. 6 is a diagram showing a state of a lump of dust taken out from the dust collector of the electric vacuum cleaner. FIG. 7 is an exploded view of the swivel part and the centrifuge part cover of the dust collector of the electric vacuum cleaner. FIG. 8: is a perspective view which shows the turning part and centrifuge part cover of the dust collector of the same vacuum cleaner.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
Hereinafter, an electric vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8.

  FIG. 1 is an overall perspective view of the electric vacuum cleaner according to the embodiment of the present invention. FIG. 2 is a schematic view of a central cross section of the vacuum cleaner body of the electric vacuum cleaner. FIG. 3 is an overall perspective view of the dust collector of the electric vacuum cleaner. FIG. 4 is a schematic cross-sectional view of the dust collector. FIG. 5A is a schematic plan view showing the behavior of the swirling airflow and dust in the dust collector. FIG. 5B is a schematic perspective view showing the behavior of the swirling airflow and dust in the dust collecting apparatus. FIG. 6 is a view showing a photograph of a lump of dust taken out from the dust collector. FIG. 7 is an exploded perspective view of the swivel unit and the centrifuge lid of the dust collector. FIG. 8 is a perspective view showing the swivel unit and the centrifuge lid of the dust collector.

  As shown in FIG. 1, the vacuum cleaner 100 of this Embodiment contains the cleaner main body 1, the hose 3, the connection pipe 4, the extension pipe 5, the suction tool 6, etc. As shown in FIG. The hose 3 is connected to a suction port 2 provided in front of the cleaner body 1. The connection pipe 4 is provided at the tip of the hose 3. The extension pipe 5 is connected to the connection pipe 4. The suction tool 6 is provided at the tip of the extension pipe 5 and has an opening (not shown) for sucking dust on the bottom surface. The vacuum cleaner main body 1 incorporates an electric blower 7 (see FIG. 2) that generates suction air for sucking dust, and is equipped with a dust collector 8 that collects dust.

  As shown in FIG. 2, the cleaner body 1 includes a lower frame body 9 that forms the lower surface of the cleaner body 1, an upper frame body 10 that forms the upper surface of the cleaner body 1, and the like. The lower frame body 9 and the upper frame body 10 are coupled by a claw fitting or a screw (not shown). The upper frame 10 of the cleaner body 1 has a dust collector 8 mounted on the upper part thereof in a detachable manner. The dust collector 8 is detachably attached to the upper frame 10 in a state where the dust collector 8 is inclined at a predetermined angle with respect to a surface to be cleaned (horizontal plane) on which the cleaner body 1 is installed. As will be described later, the dust collector 8 collects dust from air containing dust by filtration and centrifugation.

  In addition, the dust collector 8 of the vacuum cleaner 100 according to the present embodiment has a rear side, for example, approximately 45 degrees (including 45 degrees) and upward with respect to the traveling direction (the suction port 2 side) of the cleaner body 1. It is attached to the upper frame 10 of the cleaner body 1 in an inclined state.

  The lower frame body 9 includes a traveling caster 11 that is rotatably attached to the lower surface on the front side. Furthermore, the lower frame body 9 includes traveling wheels 12 configured to be able to travel at least along the front-rear direction on the left and right side surfaces on the rear side.

  Hereinafter, the front-rear direction and the left-right direction will be described with reference to the traveling direction of the cleaner body 1 in use. That is, the front-rear direction is a direction along the traveling direction of the cleaner body 1. On the other hand, the left-right direction means that the right side is the right direction and the opposite is the left direction from the rear surface (exhaust port 20 side) of the cleaner body 1 to the front.

  As shown in FIG. 2, the electric blower 7 is enclosed in the electric blower case 13. At this time, the electric blower 7 is disposed such that the suction port 14 is vertically upward with respect to the cleaner body 1. A filter case 16 that houses the filter unit 15 is disposed vertically above the suction port 14 of the electric blower 7. The electric blower case 13 and the filter case 16 are coupled by a claw fitting or a screw (not shown).

  As shown in FIGS. 3 to 5B, the outer shell of the dust collector 8 includes a dust collection container 17, an upper lid 18, a bottom lid 19, and the like. The dust collecting container 17 collects dust sucked from the air inlet 26. The upper lid 18 covers the upper surface of the dust collecting container 17 and is detachably disposed on the dust collecting container 17. The bottom cover 19 covers the lower surface of the dust collection container 17 and is pivotally supported by the dust collection container 17 so as to be rotatable.

  The upper lid 18 includes an exhaust port 20 connected to the cleaner body 1, a side wall 21 having a substantially cylindrical shape (including a cylindrical shape), a top surface (not shown), and the like. The exhaust port 20 of the upper lid 18 discharges air inside the dust collector 8.

  The upper lid 18 includes a handle portion 22 for carrying, a handle portion presser 23 that pivotally supports the handle portion 22, a decorative plate 24, a buckle 25, and the like. The buckle 25 is provided at two locations on the side wall 21 and pivotally supports the upper lid 18. As a result, the buckle 25 holds and fixes the upper lid 18 to the dust collecting container 17.

  As described above, the vacuum cleaner 100 of the present embodiment is configured.

  Below, operation | movement and an effect | action of the vacuum cleaner 100 of the said structure are demonstrated.

  First, when a user turns on a switch (not shown) of the vacuum cleaner 100, the electric blower 7 is driven to generate suction air. Thereby, the dust etc. on the surface to be cleaned such as the floor surface are sucked from the opening of the suction tool 6 together with the air. The air mixed with the dust sucked from the suction tool 6 is sucked into the cleaner body 1 through the extension pipe 5 and the hose 3 from the suction port 2 provided in front of the cleaner body 1. The air sucked into the cleaner main body 1 is sucked into the dust collecting container 17 having a substantially cylindrical shape (including a cylindrical shape) from the air inlet 26 arranged in the dust collecting container 17. At this time, the intake port 26 is provided in the dust collection container 17 along the tangential direction of the circumferential cross section of the cylindrical dust collection container 17 shown in FIG. 5A.

  As described above, the vacuum cleaner 100 operates and dust and the like are sucked into the dust collector 8.

  Moreover, the dust collector 8 of this Embodiment is provided with the said inlet 26, the brush holding | maintenance part 28, etc. in the outer peripheral side of the center part of the height direction of the dust collecting container 17, as shown in FIG. The air inlet 26 guides the dust sucked through the suction tool 6 into the dust collecting container 17. The brush holding unit 28 holds the care brush 27. The care brush 27 is used for cleaning the inside of the dust collecting container 17.

  The bottom cover 19 is rotatably supported by the dust collection container 17 via a hinge portion 29 (see FIG. 4) provided on the opposite side of the dust collection container 17 from the air inlet 26. The bottom lid 19 is locked to the dust collecting container 17 via a locking portion 30 provided on the intake port 26 side. At this time, the bottom cover 19 is locked to the dust collecting container 17 via the bottom cover packing 31. The bottom lid packing 31 maintains the bottom lid 19 and the dust collecting container 17 in an air tight state (air tightness is maintained) in a state where the bottom lid packing 31 is locked by the locking portion 30.

  Note that the bottom lid 19 is configured to be unlocked and opened by a rotation operation of the locking portion 30. That is, when the user depresses the operation lever 32 shown in FIG. 3, the locking portion 30 is unlocked and the bottom lid 19 is opened. Thereby, the dust accumulated in the dust collecting container 17 is discharged.

  Further, as shown in FIG. 4, the dust collection container 17 of the present embodiment has a substantially concentric shape (including concentric circles), a case upper portion 37 and a substantially cylindrical shape (including a cylindrical shape) in order from the upper stage. A plurality of hollow cylinders such as the first separation unit 33 and the coarse dust storage unit 38 are arranged in a state of being connected in multiple stages.

  The first separation unit 33 includes an inner cylinder frame 34 and a filtration filter 36 that covers an inner cylinder opening (not shown) in the inner cylinder frame 34.

  The case upper part 37 is provided with the inlet 26 which introduces the air containing the dust mentioned above. The air inlet 26 is disposed at an eccentric position with respect to the hollow cylinder 39 provided inside the case upper portion 37. Therefore, the air flowing from the intake port 26 generates an air flow along the tangential direction of the circumferential cross section of the hollow cylinder 39. That is, air flowing from the air inlet 26 into the hollow cylinder 39 of the case upper portion 37 flows along the inner peripheral surface of the hollow cylinder 39. As a result, as shown in FIG. 5A, the linearly flowing airflow that flows into the intake port 26 is changed into a swirling airflow by the hollow cylinder 39. Therefore, in the present embodiment, the air inlet 26 is disposed in the inner tangent direction of the hollow cylinder 39 whose side wall has a substantially cylindrical shape (including a cylindrical shape). Thereby, a swirling airflow can be generated in the hollow cylinder 39.

  In addition, you may arrange | position the inlet 26 toward the center (center) of the cylindrical dust container 17 instead of the above-mentioned eccentric position. In this case, it is preferable to provide a structure such as a guide path or a guide that generates a swirling airflow inside the dust collection container 17 of the intake port 26.

  The first separation portion 33 has a hollow portion 40 inside and is disposed below the case upper portion 37. The first separation portion 33 further includes a filtration filter 36 in which the outer diameter of the hollow cylinder 39 of the case upper portion 37 is matched with the outer periphery. The filtration filter 36 includes a plurality of vent holes on the entire outer periphery, that is, on the side peripheral surface. As will be described later, the vent hole discharges air after coarse dust in the dust is collected by the coarse dust container 38. The air discharged from the vent hole flows upward through an outer peripheral suction passage 41 formed between the outer peripheral side of the filtration filter 36 and the dust collecting container 17.

  Here, the filtration filter 36 of the present embodiment is formed by the following method.

  First, for example, a plurality of ventilation holes having a diameter of about 0.2 mm are formed by etching a metal plate having a thickness of 0.15 mm. Next, an electrolytic polishing process is performed as a post-processing. Thereby, the roughness of the surface of the metal plate generated by the rolling formation, the edge of the opening of the air hole formed by the etching process, and the processing roughness of the inner surface of the air hole are flattened to a micron order, for example. That is, the filtration filter 36 is configured by a metal filter in which a plurality of ventilation holes are formed by the above method. As a result, a swirling airflow in which air containing dust and the like smoothly flows can be formed on the inner peripheral surface of the filtration filter 36. As a material for the filtration filter 36, in addition to the above metal plate, for example, a resin or metal lattice network such as polyethylene or polypropylene may be used. In addition, a small hole may be formed in the cylinder itself of the inner cylinder frame 34 of the first separation unit 33 to substitute for the filtration filter 36.

  The filtration filter 36 is formed by the above method.

  Further, as shown in FIG. 4, the coarse dust storage portion 38 of the dust collector 8 includes a second hollow cylindrical portion 39 a, a collection portion 38 a, and the like, and is disposed at the lowest stage of the dust collection container 17. The second hollow cylindrical portion 39 a constitutes the upper portion of the coarse dust accommodating portion 38. The inner periphery of the second hollow cylindrical portion 39a is formed to coincide with the inner periphery of the filtration filter 36. The collection part 38 a constitutes a lower part of the coarse dust storage part 38. The collection part 38a is formed in, for example, a cup shape having a substantially inverted truncated cone shape (including an inverted truncated cone shape) having an inclined surface 42 of about 20 degrees (angle from the horizontal direction), for example. That is, the collection part 38a of the coarse dust accommodating part 38 is formed in the taper shape which a cylindrical side surface carries out diameter reduction toward the downward direction.

  As shown in FIGS. 4 and 7, the second centrifuge 56 includes a centrifuge lid 61 and a swivel 59 having a plurality of swivel cylinders 58 that separate fine dust. The swivel cylinder portion 58 is formed in, for example, a substantially inverted truncated cone shape (including an inverted truncated cone shape). The second centrifugal separator 56 is disposed above the first separator 33. The swivel cylinder portion 58 separates fine dust contained in the air that has passed through the first separation portion 33 into air and fine dust. That is, air containing fine dust that has passed through the first separation part 33 and is discharged from the ventilation hole of the filtration filter 36 flows into the swivel cylinder part 58 through the outer peripheral suction passage 41.

  The fine dust reservoir 57 is disposed below the swivel cylinder 58 of the second centrifugal separator 56 and above the case upper portion 37 of the dust collecting container 17. The fine dust reservoir 57 stores the fine dust separated by the swivel cylinder 58 of the second centrifugal separator 56. The fine dust reservoir 57 is formed in a substantially inverted truncated cone shape (including an inverted truncated cone shape), for example, in the shape of a cup, like the collecting portion 38a of the coarse dust accommodating portion 38. The fine dust reservoir 57 is detachably arranged with the second centrifugal separator 56.

  That is, the air containing fine dust that has passed through the first separation unit 33 flows downward while swirling in the swivel cylinder portion 58 of the second centrifugal separation unit 56, and the fine dust is centrifuged. The separated fine dust falls and accumulates in a fine dust reservoir 57 disposed below the swivel cylinder 58. The air from which the fine dust has been separated is discharged from the exhaust port 20 of the dust collector 8 via a cylindrical portion 60 of the second centrifugal separator 56 described later. The discharged air passes through the filter unit 15 shown in FIG. 2 and is sucked from the suction port 14 of the electric blower 7. The sucked air is exhausted from the cleaner body 1 to the outside.

  Below, the structure of the 2nd centrifugation part 56 is demonstrated in detail using FIG. 7 and FIG.

  As shown in FIGS. 7 and 8, the second centrifugal separator 56 is configured by a combination of the above-described swivel unit 59 and the centrifugal separator lid 61.

  The swivel unit 59 includes a swivel cylinder 58 having a substantially conical shape (including a conical shape), for example, which is constituted by eight. The swivel unit 59 is disposed concentrically with the dust collection container 17 (including concentric circles).

  The centrifuge part lid 61 includes, for example, eight cylindrical parts 60 corresponding to the swivel cylinder part 58. The centrifuge lid 61 is combined so as to cover the top surface 59 a of the swivel unit 59 of the second centrifuge 56. The eight cylindrical portions 60 are disposed so as to protrude from the inner centers of the eight swivel tube portions 58 of the swivel portion 59. The cylindrical part 60 flows into the swivel cylinder part 58 and discharges air from which fine dust has been separated upward.

  The swivel unit 59 includes one branch hole 62 in the center. On the outer periphery of the diversion hole 62, for example, the eight swivel cylinder portions 58 are arranged at equal intervals. The swivel portion 59 includes eight upper cutout openings 63 through which air or the like flows into the respective swivel tube portions 58 from the tangential direction. The upper notch 63 generates a swirl airflow in the flow of air flowing into the eight swirl cylinders 58 from the diversion holes 62.

  On the other hand, on the centrifugal separator lid 61 side, a spiral inclined portion 64 is provided at a portion combined with the eight upper notches 63 provided in the turning portion 59.

  Then, by combining the upper notch 63 of the swivel unit 59 and the spiral inclined portion 64 of the centrifugal separation unit lid 61, eight inflow ports 65 that guide the air flow into the swivel tube unit 58 are formed. The spiral inclined portion 64 is formed on the outer peripheral wall 60c of the cylindrical portion 60 of the centrifugal separator lid 61 by, for example, integral molding.

  With the above configuration, air containing fine dust and the like flowing into the second centrifugal separator 56 is first sucked from the eight inflow ports 65. The air containing fine dust that has been sucked in flows in from the tangential direction of the swivel cylinder portion 58 along the spiral inclined portion 64 provided in the centrifugal separator lid 61. As a result, a swirling airflow descending in the swirling tube portion 58 is generated. The air containing fine dust that has flowed in is centrifuged by the descending swirling airflow, and fine dust is separated from the air. Then, the separated fine dust is carried to the fine dust reservoir 57 disposed below the second centrifugal separator 56 and accumulated.

  As shown in FIG. 4, the fine dust reservoir 57 is disposed below the second centrifugal separator 56 in a substantially concentric shape (including a concentric shape) with the case upper portion 37. As described above, the fine dust reservoir 57 is formed in a substantially inverted truncated cone shape (including an inverted truncated cone shape), for example, in a cup shape. The fine dust reservoir 57 is fixed to the second centrifugal separator 56 and the case upper portion 37 of the dust collecting container 17 by, for example, fitting.

  In addition, the fine dust reservoir 57 includes an opening / closing port 69 that allows the case upper portion 37 to be opened and closed in communication with the inner side of the outer periphery of the circumferential cross section of the case upper portion 37 on the cup-shaped lower side. Specifically, in the present embodiment, a movable plate 68 that is movable up and down is used as the bottom plate of the fine dust reservoir 57. Accordingly, the opening / closing port 69 of the fine dust reservoir 57 is arranged such that the movable plate 68 constituting the bottom plate can be opened / closed with respect to the case upper portion 37.

  Further, the fine dust reservoir 57 is formed in a substantially inverted truncated cone shape (including an inverted truncated cone shape), for example, in a cup shape from the side surface to the bottom surface as described above. At this time, the movable plate 68 of the present embodiment has an inclined portion 68b that is inclined downward in the vertical direction from the center toward the outer periphery. Therefore, when the fine dust separated by the second centrifugal separator 56 falls on the movable plate 68, it accumulates in the fine dust reservoir 57 near the outer peripheral portion of the movable plate 68 by the inclined portion 68b described later.

  As shown in FIG. 4, the movable plate 68 includes a drive shaft 68 a at the center. One end of the drive shaft 68a communicates with the second centrifugal separator 56 and is fastened to a push button 22a arranged at the same row (same surface) as the upper lid 18. The other end of the drive shaft 68a is fastened to the movable plate 68 with a screw or the like (not shown).

  When the user depresses the push button 22a, the movable plate 68 is lowered through the drive shaft 68a as shown by a dashed-dotted triangle in FIG. Thereby, a gap is formed between the opening / closing port 69 of the fine dust reservoir 57 and the movable plate 68. Therefore, the fine dust accumulated in the vicinity of the outer periphery of the movable plate 68 of the fine dust reservoir 57 is, as indicated by an arrow in FIG. 4, in the hollow portion 40 of the first separation portion 33 disposed below through a gap. Fall. The movable plate 68 normally closes the opening / closing port 69 of the fine dust reservoir 57 via, for example, a packing (not shown). Thereby, the airtightness of the space between the first separation part 33 and the fine dust reservoir 57 is maintained.

  That is, the fine dust centrifuged by the second centrifugal separator 56 falls into the fine dust reservoir 57 and accumulates. At this time, the movable plate 68 constituting the bottom of the fine dust reservoir 57 is formed so that the surface roughness is finer than the surface roughness of each component constituting the second centrifugal separator 56. Therefore, the friction coefficient of the movable plate 68 is reduced, and the sliding performance of the surface of the movable plate 68 against fine dust is improved. Thereby, the fine dust dropped from the second centrifugal separator 56 smoothly slides on the surface of the inclined portion 68b of the movable plate 68 and does not remain in the middle of the inclined portion 68b, and the movable plate 68 of the fine dust reservoir 57. It accumulates in the vicinity of the outer periphery.

  As a method of reducing the surface roughness of the movable plate 68, there is usually a method of performing a surface treatment. Specifically, for example, there are methods such as painting, plating, and alumite, but the method is not particularly limited as long as it is a method for improving the surface roughness. These surface treatments improve the slipperiness due to the surface roughness against fine dust. As a result, as described above, the fine dust that has fallen from the second centrifuge 56 becomes easy to slide on the surface of the movable plate 68.

  In the present embodiment, the inclination angle of the inclined portion 68b of the movable plate 68 is set to be 60 degrees or less, for example. The inclination angle is formed by a virtual line segment in the axial direction of the drive shaft 68a and the inclined surface of the inclined portion 68b with the uppermost end (near the fastening with the drive shaft 68a) at the center of the movable plate 68 as a base point. It is defined by the angle on the acute angle side. Thereby, since the axial length of the movable plate 68 which inclines becomes short, the axial length of the 2nd centrifugation part 56 can be shortened. Therefore, the length of the dust collector 8 in the longitudinal direction can be shortened. As a result, the vacuum cleaner 100 can be reduced in size.

  Further, as shown in FIG. 4, the upper lid 18 is formed with a space formed by the upper part of the centrifugal separator lid 61 and the inner wall of the upper lid 18 and an exhaust port 20 communicating with the electric blower 7 on the rear side. . At this time, in the dust collector 8, the vicinity of the exhaust port 20 formed in the upper lid 18 is a region where the suction pressure from the electric blower 7 is the highest. Therefore, in the swivel cylinder part 58 close to the exhaust port 20 and the revolving cylinder part 58 far from the exhaust port 20, the flowing air volume (suction air volume) is non-uniform at each position.

  Therefore, in the present embodiment, as shown in FIG. 8, the height and diameter of the cylindrical portion 60 of the centrifuge lid 61 projecting toward the top surface of the upper lid 18 are changed. As a result, the amount of air flowing through each swivel cylinder 58 is adjusted to be uniform. Specifically, as shown in FIG. 8, the eight cylindrical portions 60 of the second centrifugal separator 56 are configured by two groups of, for example, four cylindrical portions 60a and four cylindrical portions 60b. One group of the cylindrical part 60b is arranged near the exhaust port 20 having a high suction pressure. One group of the cylindrical portion 60a is disposed far from the exhaust port 20 where the suction pressure is low. At this time, the diameter of the cylindrical part 60b is formed smaller than the diameter of the cylindrical part 60a. Further, the protruding height of the cylindrical portion 60b is formed higher than the protruding height of the cylindrical portion 60a, for example, in the range of 5 mm to 10 mm, and the distance between the top surface of the upper lid 18 and the cylindrical portion 60b is shortened. Thereby, the ventilation pressure loss which flows into the cylindrical part 60b side increases. Therefore, the pressure difference between the cylindrical portion 60a located far from the exhaust port 20 and the cylindrical portion 60b located nearby is reduced. As a result, the amount of air flowing through each swivel cylinder 58 can be made more uniform.

  In other words, the height of the cylindrical portion 60b on the revolving cylinder portion 58 side where the air volume is increased is increased, and the distance from the top surface of the upper lid 18 is decreased. Thereby, ventilation pressure loss is applied to the cylindrical portion 60b on the side of the swivel cylinder portion 58 with a large air volume, and the pressure difference with the cylindrical portion 60a on the side of the swivel cylinder portion 58 with a small air volume is adjusted. As a result, the amount of air flowing through the cylindrical portions 60 of the plurality of swivel tube portions 58 arranged in parallel becomes more uniform, and there is no bias in the amount of air flowing through each of the cylindrical portions 60a and 60b. Thereby, while the fall of the separation performance of the dust contained in the air in the 2nd centrifugation part 56 is prevented, generation | occurrence | production of a wind noise is suppressed.

  Further, in the present embodiment, the opening area is changed by changing the diameter of each cylindrical portion 60, so that the air volume to the plurality of revolving cylinder portions 58 is made uniform. Thereby, the airflow flowing through the plurality of swivel cylinders 58 arranged in parallel with the second centrifugal separator 56 can be made more uniform.

  Further, in the present embodiment, as shown in FIG. 7, a rectifying rib 76 is provided at the lower end of the cylindrical portion 60. The rectifying ribs 76 are provided, for example, in the diameter direction of the cylindrical portion 60 so as to block the turning of the airflow turning in the cylindrical portion 60. The rectifying ribs 76 suppress the turbulence of the airflow that occurs when air is discharged upward from the cylindrical portion 60 through the turning portion 59. Thereby, the fine dust separation performance in the 2nd centrifugation part 56 can be improved.

  Further, with the configuration of the cylindrical portion 60 of the swivel cylinder portion 58 described above, even when the dust collector 8 is mounted on the cleaner body 1 in an inclined state, the air volume of each swivel tube portion 58 can be made uniform. Therefore, when the second centrifugal separator 56 performs the centrifugal separation, it is possible to suppress the winding of the fine dust accumulated in the fine dust reservoir 57 due to the rising air flow generated in the central portion of the cylindrical portion 60. As a result, the backflow of fine dust to the swivel cylinder 58 can be suppressed.

  Also, as shown in FIG. 4, a transfer portion packing 77 is attached between the fine dust reservoir 57 and the end of the swivel cylinder 58 of the second centrifugal separator 56. The transfer part packing 77 keeps the airtightness between the fine dust reservoir part 57 and the end part of the swivel cylinder part 58 of the second centrifugal separator 56 and prevents the fine dust from flowing back into the dust collecting container 17.

  As described above, the dust collector 8 of the electric vacuum cleaner 100 of the present embodiment is configured.

  Below, operation | movement and an effect | action of the dust collector 8 of the vacuum cleaner 100 provided with the said structure are demonstrated.

  First, when the operation of the electric blower 7 is started by the user, a suction airflow is generated. Dust on the surface to be cleaned is sucked from the opening of the suction tool 6 by the suction airflow. The air containing the sucked dust is sucked into the dust collector 8 through the extension pipe 5 and the hose 3 from the air inlet 26 of the cleaner body 1.

  At this time, as described above, the case upper portion 37 constituting the dust collecting container 17 includes the air inlet 26 for introducing air containing dust. The air inlet 26 is arranged at an eccentric position with respect to the hollow cylinder 39 in the case upper portion 37 so that the airflow flows from the tangential direction of the circumferential cross section of the hollow cylinder 39. Therefore, the air that flows into the hollow cylinder 39 of the case upper portion 37 from the air inlet 26 flows along the inner peripheral surface of the hollow cylinder 39. As a result, the flow of air that flows linearly from the air inlet 26 changes to a swirling airflow that flows along the inner peripheral surface of the hollow cylinder 39.

  Moreover, the 1st isolation | separation part 33 arrange | positioned under the case upper part 37 is equipped with the filtration part 36 which has the hollow part 40 and several ventilation hole inside. On the outer peripheral side of the filtration filter 36, an outer peripheral suction passage 41 is formed as a space through which air flows to the upper second centrifugal separator 56.

  Further, the dust container 17 has a coarse dust container 38 disposed in the lowermost stage and in the vicinity of the filtration filter 36. The coarse dust accommodating portion 38 includes a second hollow cylindrical portion 39a and a cup-shaped collecting portion 38a having an inverted frustoconical shape in which an inclined surface 42 of about 20 degrees is formed below the second hollow cylindrical portion 39a. The coarse dust container 38 centrifuges air containing dust flowing along the swirling airflow into coarse dust mainly composed of cotton dust and air containing fine dust, for example, by the filter 36. To accommodate.

  Here, the behavior of the dust housed in the coarse dust housing section 38 will be described with reference to FIGS. 5A and 5B.

  As shown in FIGS. 5A and 5B, the dust mainly composed of separated cotton dust accumulates in the space of the coarse dust container 38 below the dust container 17.

  The air containing dust flowing in from the air inlet 26 is given a swirling airflow component in the case upper portion 37. Due to the swirl airflow component, the air containing dust is guided to the coarse dust container 38 while swirling and descending on the smooth surface of the filtration filter 36 (see FIG. 4).

  Thereafter, the dust-containing air is caused by the swirling airflow generated by the inclined surface 42 that is the side surface shape of the collection portion 38a of the coarse dust storage portion 38 and the hollow portion 40 (see FIG. 4) of the filtration filter 36. Spin and keep rolling.

  Next, the dust that sequentially flows into the coarse dust container 38 is caught in the spinning dust and entangled with each other. For example, particularly lint such as hair is wound around dust like a spool. Therefore, as shown in FIG. 6, the dust gradually swells up as a ball-like lump such as marimo.

  And since dust entangles with each other, dust does not fall apart. Thereby, dust can be easily discarded from the dust collector 8 in an entangled state.

  Further, the ball-shaped dust lump rotates along the surface of the filtration filter 36. Therefore, the dust adhering to the surface of the filtration filter 36 is removed while being entangled with the ball-shaped dust lump. Thereby, when the dust is thrown away, an operation of removing the dust stuck to the surface of the filtration filter 36 becomes unnecessary.

  Further, as described above, the first separation portion 33 does not have a cylinder such as an inner cylinder in which dust having a long hair such as hair is entangled. Therefore, when the dust is thrown away, the work of removing the entangled dust becomes unnecessary.

  The coarse dust that is larger than the ventilation holes of the filtration filter 36 is accommodated in the coarse dust accommodating portion 38 as a lump of ball-like dust. On the other hand, air containing fine dust smaller than the vent hole of the separated filtration filter 36 flows into the second centrifugal separator 56 via the vent hole and the outer peripheral suction passage 41.

  At this time, the first separation portion 33 having the filtration filter 36 is disposed below the case upper portion 37. Therefore, the airflow that flows in from the intake port 26 is a swirling airflow that descends. Thereby, the coarse dust separated by the first separation part 33 is stably collected in the bottomed coarse dust containing part 38 located on the lower side.

  A filtration filter 36 having a vent is provided on the outer wall surface of the first separation portion 33. Thereby, the air exhausted from the first separation part 33 flows from the inner side to the outer side in the radial direction of the first separation part 33. Therefore, the separated coarse dust is pressed against the inner peripheral surface of the filtration filter 36. However, the pressed coarse dust comes into contact with the coarse dust swirling in a lump state as described above, and is reliably entangled from the filtration filter 36.

  The coarse dust container 38 is disposed below the first separator 33 and in the vicinity of the filtration filter 36. Therefore, even if the dust separated by the first separation unit 33 is in a small amount of lump, the lump of dust can easily reach the surface of the filtration filter 36. Thereby, the dust entangled with the filtration filter 36 can be more reliably entangled.

  The second centrifugal separator 56 includes a plurality of swivel cylinders 58 that are disposed above the first separator 33 and separate fine dust. The swivel cylinder part 58 is discharged from the ventilation hole of the filtration filter 36, passes through the outer peripheral suction passage 41, and separates fine dust contained in the air that has passed through the first separation part 33. The fine dust reservoir 57 is disposed below the second centrifugal separator 56 and stores fine dust separated by the second centrifugal separator 56.

  At this time, the accumulated fine dust can be discharged directly from the fine dust reservoir 57 by removing the fine dust reservoir 57. Thereby, it can prevent that coarse dust and fine dust are mixed. As a result, it is possible to prevent the fine dust from rising due to the mixture of the coarse dust and the fine dust, and to prevent the fine dust from adhering to people and clothes and the dirt around the trash can.

  Next, the air that does not contain dust that has passed through the second centrifugal separator 56 flows out from the cylindrical portion 60 of the centrifugal separator lid 61 that protrudes into the inside of the swivel cylinder 58. The air that has flowed out passes through the exhaust port 20 provided in the upper lid 18 and the filter unit 15, and is sucked into the suction port 14 of the electric blower 7. The sucked air is exhausted out of the cleaner body 1.

  Further, when discharging dust from the dust collection container 17 of the dust collector 8, the user presses down the push button 22a. At this time, the movable plate 68 is lowered via the drive shaft 68a fastened to the push button 22a, and the opening / closing port 69 of the fine dust reservoir 57 is opened. Thereby, the fine dust accumulated in the fine dust reservoir 57 falls from the opening / closing port 69 to the coarse dust container 38 through the hollow part 40 of the first separation part 33 located below.

  Next, the user slides the operation lever 32 downward. Thereby, the lock | rock of the latching | locking part 30 provided in the bottom cover 19 is released, and latching with the dust collecting container 17 is cancelled | released. Then, the bottom cover 19 rotates around the hinge portion 29, and the dust collecting container 17 is opened. Thereby, the dust accumulated in the coarse dust container 38 and the fine dust reservoir 57 below the dust container 17 is discharged to the outside of the dust collector 8. That is, the user can discharge the accumulated fine dust without turning the fine dust reservoir 57 upside down by operating the operation lever 32 when discarding the dust. Therefore, scattering of fine dust to the surroundings can be more reliably suppressed.

  In the present embodiment, in the operation of discharging dust, the push button 22a is pushed, the movable plate 68 is moved downward, the opening / closing port 69 is opened, and fine dust is collected from the fine dust reservoir 57. Although the configuration of dropping to 38 has been described as an example, it is not limited to this. For example, a configuration in which the push button 22a is pulled up and the movable plate 68 is pulled up may be employed. Further, the movable plate 68 may be rotated by rotating the push button 22a. Further, the movable plate 68 may be rotated by pushing down or pulling up the push button 22a.

  In the present embodiment, the configuration in which the movable plate 68 is movable up and down has been described as an example, but the present invention is not limited to this. For example, the movable plate 68 may be rotated in conjunction with the push button 22a and the drive shaft 68a, and fine dust may be dropped by centrifugal force. Thereby, the fine dust accumulated on the movable plate 68 can be further easily dropped. Further, the drive shaft 68a may be moved up and down to give vibration to the movable plate 68, and fine dust may be dropped from the movable plate 68. Specifically, for example, a groove may be formed on the drive shaft 68a, and the movable plate 68 may be vibrated when the movable plate 68 passes through the groove. Furthermore, the order and method of the operation for discharging the dust are not limited to the above methods, and any configuration can be adopted as long as it is a configuration for discharging the dust.

  Further, when the separated fine dust is a small amount, only the coarse dust may be discharged by moving the operation lever 32.

  In addition, after operating the operating lever 32 and discharging coarse dust, the push button 22a may be pushed down to discharge fine dust. Thereby, the rising of the fine dust due to the mixture of the fine dust and the coarse dust can be reduced. That is, the user can control the timing of discharging fine dust and coarse dust to reduce the scattering of dust such as fine dust to the surroundings.

  In the present embodiment, the configuration in which the eight turning cylinder portions 58 are provided in the turning portion 59 has been described as an example, but the present invention is not limited to this. The number of swivel cylinder portions 58 is not limited to eight, and may be any number as long as it is two or more. Thereby, the same effect is acquired.

  Note that the dust collector 8 of the present embodiment can basically collect all dust by filtration and centrifugation during use. However, there are cases where the amount of air flowing into the first separation unit 33 or the second centrifugal separation unit 56 is unstable when the electric blower 7 is started or when the operation is completed. In this case, there is a possibility that part of the air containing dust that could not be filtered and centrifuged by the dust collector 8 is sucked into the electric blower 7.

  Therefore, the dust collector 8 of the present embodiment is provided with a filter unit 15 in the middle of the suction path between the exhaust port 20 of the dust collector 8 and the suction port 14 of the electric blower 7. Thereby, inhalation of the dust-containing air into the electric blower 7 can be reliably prevented. As a result, generation | occurrence | production of the malfunction of the electric blower 7 can be prevented beforehand. At this time, a HEPA filter or the like may be employed as the filter medium of the filter unit 15. Thereby, higher dust collection performance and cleaner exhaust of air can be realized.

  As described above, the vacuum cleaner of the present invention includes at least a dust collector. The dust collector is arranged at the upper part of the substantially cylindrical case having a side wall that sucks air containing dust from the intake port and generates a swirling airflow, and the lower part of the upper part of the case. A substantially cylindrical filtration filter having a first separation part for separating coarse dust from air containing dust. In addition, the dust collector is disposed below the first separation unit and in the vicinity of the filtration filter, and on the outer peripheral side of the first separation unit and the coarse dust storage unit that stores the coarse dust separated by the first separation unit. An outer peripheral suction passage that is located and communicates with the first separation portion via a filtration filter. Further, the dust collector is disposed above the upper part of the case, communicates with the outer peripheral suction passage, and centrifuges at the second centrifuge unit for centrifuging fine dust from air from which coarse dust has been separated, and at the second centrifuge unit. A fine dust reservoir for collecting fine dust.

  According to this configuration, air containing dust flowing in from the air inlet is given a swirling airflow component at the upper part of the case, and is guided to the coarse dust container while swirling and descending the surface of the filter. The air containing dust continues to roll while spinning, due to the swirling airflow generated in the coarse dust container and the hollow portion of the filtration filter. Thereafter, the sequentially flowing dust is caught in the spinning dust. Then, it gradually swells in a ball-like lump like Marimo, for example. For this reason, even lint such as hair wraps around dust that is a lump-like lump. Thereby, it can suppress that dust is scattered and can discharge in the state of a lump.

  At this time, it is possible to prevent long dust such as hair from being entangled with the side wall of the first separation portion by entwining the dust with each other by the swirling airflow. Furthermore, the lump of dust entangles the dust on the surface of the filtration filter while turning around the surface of the filtration filter. Therefore, the frequency | count of the operation | work etc. which remove the dust stuck on the filtration filter can be reduced.

  Further, fine dust, which is relatively fine dust that has passed through the filtration filter, is centrifuged by the second centrifugal separator, and accumulated and accumulated in the fine dust reservoir. Thereby, the rising of the fine dust generated by mixing the coarse dust and the fine dust can be suppressed. As a result, it is possible to effectively suppress adhesion to people and clothes due to soaring dust and dirt around the trash can.

  Moreover, the vacuum cleaner of this invention has an inclined surface in which a coarse dust accommodating part inclines toward the downward side. Thereby, the lump of dust easily rolls in various directions along the inclined surface. For this reason, the dust is more entangled with each other and becomes a mass. As a result, the dust can be easily discarded in a lump without breaking up dust.

  Further, in the vacuum cleaner of the present invention, the fine dust reservoir is disposed between the upper part of the case and the second centrifuge part, and can be opened and closed with the upper part of the case inside the outer periphery of the circumferential cross section of the upper part of the case. It has an open / close port that communicates. As a result, fine dust is dropped from the fine dust reservoir toward the first separation part and accommodated in the coarse dust accommodating part. And fine dust can be discharged | emitted from the coarse dust accommodating part outside by opening | releasing a bottom cover. Therefore, when the dust is thrown away, the accumulated fine dust can be discharged without rotating the fine dust reservoir upside down. As a result, it is possible to provide a sanitary electric vacuum cleaner in which fine dust is less scattered around.

  Moreover, the vacuum cleaner of this invention is comprised by the movable baseplate by which an opening-and-closing port is fastened via a drive shaft.

  According to this structure, a drive shaft is connected with components, such as a handle part and a push button which are arrange | positioned at the outer surface of a vacuum cleaner. Therefore, fine dust can be discharged by moving the bottom plate by operating the connected components. That is, the user can control the discharge timing of fine dust. Therefore, it is possible to reduce the scattering of fine dust to the surroundings. Thereby, a sanitary vacuum cleaner can be provided.

  INDUSTRIAL APPLICABILITY The present invention can be applied to various types of vacuum cleaners such as commercial vacuum cleaners as well as household vacuum cleaners that require prevention of dust scattering and simple discharge processing when dust is thrown away.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Suction port 3 Hose 4 Connection pipe 5 Extension pipe 6 Suction tool 7 Electric blower 8 Dust collector 9 Lower frame body 10 Upper frame body 11 Caster 12 Wheel 13 Electric blower case 14 Suction port 15 Filter part 16 Filter case DESCRIPTION OF SYMBOLS 17 Dust collection container 18 Top cover 19 Bottom cover 20 Exhaust port 21 Side wall 22 Handle part 22a Push button 23 Handle part presser 24 Decoration plate 25 Buckle 26 Air inlet 27 Maintenance brush 28 Brush holding part 29 Hinge part 30 Locking part 31 Bottom cover Packing 32 Operation lever 33 First separation part 34 Inner cylinder frame 36 Filtration filter 37 Case upper part 38 Coarse dust storage part 38a Collection part 39 Hollow cylinder 39a Second hollow cylinder part 40 Hollow part 41 Outer peripheral suction passage (space)
42 Inclined Surface 56 Second Centrifugal Separator 57 Fine Dust Reservoir 58 Swivel Cylinder 59 59 Swivel Part 59a Top 60, 60a, 60b Cylindrical Part 60c Outer Wall 61 Centrifugation Part Lid 62 Dividing Hole 63 Upper Notch 64 Spiral Inclined part 65 Inlet 68 Moving plate (bottom plate)
68a Drive shaft 68b Inclined part 69 Opening and closing port 76 Rectification rib 77 Transfer part packing 100 Vacuum cleaner

Claims (4)

Including at least a dust collector,
The dust collector is
An upper part of the case having a substantially cylindrical side wall for sucking dust-containing air from the air inlet and generating a swirling airflow;
A first separation part that is arranged below the upper part of the case and separates coarse dust from air containing dust by a substantially cylindrical filter having a vent on a side peripheral surface;
A coarse dust container that is disposed below the first separation part and in the vicinity of the filtration filter, and contains the coarse dust separated by the first separation part;
An outer peripheral suction passage located on the outer peripheral side of the first separation portion and communicating with the first separation portion via the filtration filter;
A second centrifuge that is arranged above the case and communicates with the outer peripheral suction passage to centrifuge fine dust from the air from which the coarse dust has been separated;
A fine dust reservoir for storing the fine dust centrifuged by the second centrifugal separator,
Electric vacuum cleaner. The coarse dust container has an inclined surface whose side surface is inclined downward.
The electric vacuum cleaner according to claim 1. The fine dust reservoir is disposed between the upper part of the case and the second centrifugal separator,
On the inner side of the outer periphery of the circumferential cross section of the upper part of the case, there is an opening and closing port that communicates with the upper part of the case so as to be opened and closed
The vacuum cleaner of any one of Claim 1 or Claim 2. The opening / closing port is configured by a movable bottom plate fastened through a drive shaft.
The electric vacuum cleaner according to claim 3.