JP4769049B2 - Vacuum cleaner - Google Patents

Description

  The present invention relates to an electric vacuum cleaner that sucks dust together with air, separates dust from the air, and collects dust in a dust collection chamber.

  An electric vacuum cleaner generally includes an electric blower that sucks dust together with air into a suction air passage, and a dust collection chamber that separates dust from the sucked air and collects the dust. In the dust collection chamber of such a vacuum cleaner, dust is taken in together with air from an intake port provided at the upper portion, and the side wall of the dust collection chamber is opened below the intake port and air is opened from an opening where a filter is attached. There are some which collect dust at the lower part while constituting a part of the suction air passage by discharging the air.

In this case, since the air path from the intake of the dust collection chamber to the opening faces downward, the inertial force and gravity act on the dust contained in the air flowing through the air passage, so that the dust is collected in the dust collection chamber. The air is directed to the lower part and the air is directed to the opening, so that dust separated from the air can be collected in the lower part of the dust collecting chamber (see, for example, Patent Document 1). Moreover, since the filter is attached to the opening, dust that has not been separated from the air is captured by the filter and is prevented from passing through the opening. As described above, the dust collection chamber is configured to collect the dust in the lower portion while discharging air from the opening portion of the side wall, so that the air cannot be passed through the opening portion, that is, stacked from the lower portion. It is possible to accumulate a volume of dust up to the vicinity of the upper end of the opening.
Japanese Patent Laying-Open No. 2005-027880 (page 1-11, FIG. 11)

  However, in the vacuum cleaner, the filter captures dust by allowing the air to pass through a gap that is finer than the dust contained in the air. Therefore, there is a possibility that the location where the filter captures the dust is clogged. In addition, since the air flow passing between the two points is formed along a position near the shortest distance between the two points, when the air taken into the dust collection chamber from the intake port is discharged from the opening, the intake port In the opening located below, a flow passing through the upper part closest to the intake is formed. When clogging occurs in the upper part of the filter by forming the air flow passing through the upper part of the filter, the range in which the air can pass through the opening is reduced downward. . In the dust collection chamber, as described above, the accumulated dust can accumulate a volume of dust up to the vicinity of the upper end of the opening, so that the range in which air can pass through the opening is reduced downward. As a result, the volume of dust that can accumulate in the dust collection chamber is reduced.

  Accordingly, an object of the present invention is to increase the volume of dust that can accumulate in the dust collection chamber due to clogging that occurs in the filter provided at the opening of the side wall of the dust collection chamber that serves as a discharge location for air from the dust collection chamber. An object of the present invention is to provide a vacuum cleaner that can minimize the decrease.

In order to solve the above-mentioned problems, the present invention collects dust by flowing the dust together with air from the upper intake port in the middle of the suction air passage, and an electric blower that sucks dust together with air into the suction air passage. a dust collecting chamber, and a side wall of the dust collecting chamber which is provided with an opening which is located below the inlet, a filter which is attach to the opening provided on the downstream side of the upper portion of the filter the flow rate through the top of the filter to form an air flow deceleration space between the top of the filter, characterized by Rukoto and a air-flow control unit to reduce than the flow rate through the lower Te.

  According to the electric vacuum cleaner of the present invention, the air flow rate adjusting unit forms an air flow deceleration space between the upper part of the filter, so that the air passing through the upper part of the filter is made to flow through the air flow deceleration space and The air that has passed through the lower part of the filter is a flow that does not pass through the air flow deceleration space. For this reason, the air flow passing through the upper part of the filter is decelerated by the air flow deceleration space and goes downstream of the suction air passage, and the air flow passing through the lower part of the filter goes directly downstream of the suction air passage. The amount of air passing through the upper part of the filter can be reduced compared to the amount of air passing through the lower part of the filter. In this way, in the dust collection chamber, the air flow that passes through the lower part of the filter becomes the main flow, so even if the filter is clogged, the range in which the air can pass through the filter is from the lower part to the upper part. In contrast to the accumulation of dust from below, air can pass through the top of the filter to the end. Therefore, since the dust can be collected in the dust collecting chamber until the filter is clogged over the entire area, the reduction in the volume of dust that can be accumulated in the dust collecting chamber due to the clogging of the filter is minimized. be able to.

  Hereinafter, an example which is an embodiment of a vacuum cleaner concerning this invention is described based on a drawing.

  The vacuum cleaner 10 shown in FIG. 1 has a vacuum cleaner main body 11 and a dust collecting hose 12 having one end detachably connected to a connection port 11A of the vacuum cleaner main body 11 and a hand operation tube 13 provided at the other end. And an extension pipe 14 that is detachably connected to the hand operation pipe 13 and a suction port body 15 that is detachably connected to the distal end portion of the extension pipe 14. The operation tube 13 is provided with an operation unit 13A, and the operation unit 13A is provided with a plurality of operation switches 13a.

  A suction chamber (not shown) in which a suction opening (dust suction port) (not shown) for sucking dust is formed on the bottom surface of the suction port body 15 is formed. The suction chamber includes an extension pipe 14 and a dust collecting hose. 12 communicates with a suction connection port 57a of a dust collection unit 50 (see FIG. 6) provided in the cleaner body 11.

  The vacuum cleaner main body 11 includes a main body case 20, a dust collection unit 50 (see FIG. 6) mounted in the main body case 20, and an electric blower 24 described later.

  As shown in FIGS. 2 to 5, a dust collection unit chamber (mounting portion) 22 is formed on the front side of the main body case 20. The dust collection unit chamber 22 has a dust separation unit 400 and a dust collection unit, which will be described later. The unit 410 is detachably mounted.

  An opening 23 is formed in the upper part of the dust collecting unit chamber 22 (see FIG. 3), and the opening 23 is closed by lid cases 21A and 21B as shown in FIG. Further, an electric blower 24 is provided on the rear side of the main body case 20, and a cylindrical connection air passage portion 25 having a front opening 25B is formed on the front side (right side in FIG. 2) of the electric blower 24. A lattice member 25K is disposed in the connection air passage portion 25, and a seal member 27 is attached to the front opening 25B. A connection opening 25b is formed in the rear wall 25A of the connection air passage 25, and the connection opening 25b communicates with the suction opening 24A of the electric blower 24.

  As shown in FIGS. 3 to 5, the dust collection unit chamber 22 is provided with a drive gear (first transmission means) Ga and a drive motor (drive means) M that rotates the drive gear Ga.

  As shown in FIGS. 6 to 8, the dust collection unit 50 includes a dust separation unit 400 and a dust collection unit 410.

  The dust separation unit 400 includes a dust separation part (first separation part) 52, a filter part 80 integrated with the dust separation part 52, and a lid case 21A provided on the filter part 80. Yes. The dust collection unit 410 includes a dust collection unit 70 and a lid case 21 </ b> B provided on the dust collection unit 70.

  The dust separator 52 includes a separation chamber 54 formed in a cylindrical shape by the outer peripheral wall 53, and a substantially conical dust separation means 55 provided in the separation chamber 54 along the axis of the separation chamber 54. A suction air passage portion 56 provided outside the right side wall 54A (see FIG. 9) of the separation chamber portion 54 and a guide air passage tube 57 for guiding air from the suction connection port 57a (see FIG. 6) to the separation chamber portion 54. And have. The suction connection port 57a communicates with the connection port 11A of the cleaner body 11 when the dust separation unit 400 is mounted in the dust collection unit chamber 22 of the cleaner body 11.

  As shown in FIG. 7, at the upper part of the outer peripheral wall 53 of the separation chamber portion 54, the dust is separated from the introduction opening 53A for introducing dust separated from the air into the dust collecting portion 70 and the discharge opening 84K (see FIG. 10). An introduction hole 153 </ b> B is formed through which the introduced dust is introduced into the separation chamber portion 54.

  Further, as shown in FIGS. 9 and 10, a circular opening 154A and a fan-shaped opening 154B are formed on the right side wall 54A of the separation chamber 54, and a dust separating means 55 is attached to the opening 154A. A net filter NF2 is attached to the opening 154B. Further, a connection opening 54Aa is formed in the right side wall 54A, and a guide air passage tube 57 is connected to the connection opening 54Aa, and the separation chamber portion 54 and the guide air passage tube 57 communicate with each other.

  The left side surface (in FIG. 7) of the separation chamber portion 54 is opened, and a lid 58 (see FIG. 8) is detachably attached to the opening 54Ba (see FIG. 9).

  As shown in FIG. 10, the dust separating means 55 is attached to the periphery of the connecting frame 55c, a circular plate 55a, a ring frame 55b, a plurality of connecting frames 55c connecting the circular plate 55a and the ring frame 55b. And a net filter NF1. The suction air passage portion 56 communicates with the inside of the separation chamber portion 54 through the opening 154A of the right side wall 54A and the net filter NF1, and inside the separation chamber portion 54 through the net filter NF2 of the opening 154B of the right side wall 54A. Communicating with

  The suction air passage section 56 communicates with a storage case 81 of the filter section 80 described later, and a dust collection case section 74 described later through a connection opening 56A formed in the right side wall section 156 (see FIG. 7). To the dust collection chamber 73.

  The guide air duct 57 rotates the air introduced from the connection opening 54Aa of the separation chamber 54 into the separation chamber 54 counterclockwise as indicated by the arrows in FIGS.

  As shown in FIGS. 11 and 12, the dust collection portion 70 includes a communication case portion 72 in which a communication passage 71 (see FIG. 7) extending in the left-right direction is formed in the upper portion, and a lower side from the right end portion of the communication case portion 72. And a dust collection case 74 having a dust collection chamber 73 (see FIG. 7) for collecting dust.

  An opening 72A is formed in the lower surface of the communication case portion 72, and the opening 72A is connected to the introduction opening 53A of the dust separation case 52 as shown in FIG. The communication case portion 72 and the dust collection case portion 74 communicate with each other through the boundary portion (600), and are a direction perpendicular to the boundary portion (600), that is, a downward direction as viewed from the boundary portion (600) in the vertical direction. A dust collection case 74 is extended toward the end. For this reason, in the present embodiment, the boundary portion (600) between the communication case portion 72 and the dust collection case portion 74 becomes the intake port 600 positioned at the upper portion of the dust collection chamber 73.

  As shown in FIG. 24, a connection opening 75 is formed in the dust collection case 74. The connection opening 75 is a through-hole that opens over the entire left side wall portion 74A (in FIG. 24) of the dust collecting case portion 74. In the present embodiment, the connection opening 75 is provided in the side wall ridge portion 601 provided in the left side wall portion 74 </ b> A of the dust collection case portion 74. The side wall ridge portion 601 has a cylindrical shape protruding from the left side wall 74A toward the dust collection chamber 73 (see FIG. 13), and extends in an annular shape along the outer edge of the left side wall 74A. The side wall ridge portion 601 is provided with bosses 602 on each of the upper side and the lower side, and each boss 602 is formed with a screw hole 602A. The connection opening 75 is defined by the protruding end 601A of the side wall ridge portion 601.

  Further, a flange portion 601B is formed on the protruding end portion 601A of the side wall ridge portion 601. The flange portion 601B is formed by cutting out the protruding end portion 601A so as to surround the connection opening 75, and constitutes an attachment portion of the net filter NF3. The net filter NF3 includes a lattice-shaped frame portion 604 that forms a plurality of window portions 603 (see FIGS. 12 and 13), and a net portion 605 provided with fine through holes. The net filter NF3 is configured such that each window portion 603 is covered with a net portion 605, and can pass air and capture dust. The net filter NF3 is formed in a size that can be disposed in the flange portion 601B, and can cover the connection opening 75.

  An attachment recess 601D is formed on the left side wall portion 74A on the suction air passage portion 56 side. The mounting recess 601D is formed by cutting out the left side wall portion 74A so as to surround the rectangular through hole defined by the cylindrical side wall protruding portion 601 and constitutes a mounting portion of the cover plate 170. The cover plate 170 is made of a material that does not allow air to pass through, has a plate shape with a size that can be fitted into the mounting recess 601D, and is provided with an opening 170A. The opening 170A has a rectangular shape, is set to have an opening area smaller than that of the connection opening 75, and has a lower end equal to the lower end of the connection opening 75 when viewed in the horizontal direction in a state of being attached to the attachment recess 601D. Has been. For this reason, when viewed from the downstream side along the suction air passage, that is, when viewed in the horizontal direction from the suction air passage portion 56 side, the connection opening 75, that is, the upper part of the net filter NF3 is covered by the cover plate 170 over the entire width along the horizontal direction. (See FIG. 12).

  In this embodiment, the attachment frame 606 is used to attach the net filter NF3. The attachment frame 606 is an annular plate frame member, and has a size that can be disposed along the annular flange portion 601B.

  The net filter NF3 and the cover plate 170 have two fastenings in a state where the net filter NF3 is disposed in the flange portion 601B, the mounting frame 606 is disposed thereon, and the cover plate 170 is disposed in the mounting recess 601D. The member 607 is screwed into the screw hole 602A of each boss 602, thereby being attached to the left side wall 74A. In this attached state, the opening 170A of the cover plate 170 (see FIG. 12) that forms the outer peripheral surface of the dust collecting case 74 is connected to the connection opening 56A of the suction air passage 56 (FIGS. 7 and 24). reference.).

  In the present embodiment, the connection opening 75 of the left side wall portion 74A is an opening provided in the side wall of the dust collecting chamber 73, and the cover plate 170 is provided at a predetermined interval from the net filter NF3 attached to the connection opening 75. It has been. For this reason, in the present embodiment, the cover plate 170 serves as an air volume adjusting portion, and a space formed between the cover plate 170 and the net filter NF3 serves as an air flow deceleration space 608. The air flow deceleration space 608 communicates with the dust collecting chamber 73 through the connection opening 75 and the net filter NF3, and communicates with the suction air passage section 56 through the opening 170A and the connection opening 56A of the cover plate 170. Note that the predetermined distance between the net filter NF3 and the cover plate 170 is such that the air flow deceleration space 608 defined there passes a flow rate that passes through the upper part of the net filter NF3 and a flow rate that passes through the lower part of the net filter NF3. For example, the size of the intake port 600 of the dust collection chamber 73 and the size of the connection opening 54 </ b> A that serves as a discharge location of the air from the dust collection chamber 73 from the viewpoint of such air flow. It can be appropriately set in consideration of dimensions and the like.

  As a result, the dust collection chamber 73, the side wall ridge portion 601 and the cover plate 170 pass through the connection opening 75 and the net filter NF3 from the upper intake port 600 in the suction air passage extending from the communication passage 71 to the suction air passage portion 56. After that, an air passage that reaches the suction air passage portion 56 via the air flow deceleration space 608 and an air passage that reaches the suction air passage portion 56 without passing through the air flow reduction space 608 are formed. The dust collection chamber 73 constitutes a part of the suction air passage from the suction port body 15 to the electric blower 24, the intake port 600 is located on the upstream side, and the connection opening 75 is located on the downstream side, The air flow deceleration space 608 is located on the downstream side of the dust collection chamber 73.

  Further, as shown in FIG. 13, the dust collection case portion 74 includes a case portion 174 whose right side surface is open, and a lid 77 (see FIG. 14) that is attached to the opening 76 of the case portion 174 so as to be freely opened and closed. Has been.

  An arm 77M extending in the left direction as shown in FIG. 12 is formed on the bottom wall 77A of the lid 77, and a shaft 77J is provided on the arm 77M as shown in FIG. The shaft portion 77J is rotatably held by a bearing portion 78 provided at the bottom of the dust collecting case portion 74. And the opening 76 of the dust collecting case part 74 is opened and closed by the lid body 77 turning around the shaft part 77J.

  Further, a hook (not shown) is formed on the upper portion of the lid 77, and the hook 77 is locked to a locking portion (not shown) of the dust collecting case 74 so that the lid 77 is not opened. . Then, as shown in FIG. 15, when the release button 21Ba provided on the lid case 21B of the dust collecting unit 70 is operated, the hook is unlocked, and the lid body 77 is moved downward, whereby the lid body 77 is released. Opens around the shaft 77J by its own weight.

  As shown in FIG. 14, the lid 77 includes a bottom wall portion 77A, side wall portions 77B and 77C formed on both sides of the bottom wall portion 77A, and an upper wall formed on top of the side wall portions 77B and 77C. A portion 77D, and a bottom plate 77A, side walls 77B and 77C, and a cover plate 77E surrounded by the upper wall 77D. The case portion 174 and the lid body 77 are formed by dividing the dust collection case portion 74 into two vertically and the width of the side wall portion 77B of the lid body 77 is the side portion of the dust collection case portion 74. Is set to 1/2 or more of the width.

  When the dust collecting unit 410 is attached to the dust collecting unit chamber 22 of the cleaner body 11 to which the dust separating unit 400 is attached, the dust separating case 52 is introduced into the opening 72A of the dust collecting unit 410 as shown in FIG. The opening 53A is connected, and the opening 170A of the cover plate 170 of the dust collection unit 410 is connected to the connection opening 56A of the suction air passage unit 56 of the dust separation unit 400.

  The filter unit 80 includes a cylindrical storage case 81 whose rear surface (left side in FIG. 8) is open, a pleated filter body (secondary filter) 100 that is rotatably mounted in the storage case 81, and It has a sweeping body 300 (see FIG. 16) that rotates integrally with the pleated filter body 100. A dust separator 52 is integrally formed on the front surface (right side in FIG. 6) of the front wall (partition wall) 84 of the storage case 81. The inside of the storage case 81 is a filter chamber 181 (see FIG. 10).

  As shown in FIG. 16, the front wall portion 84 of the storage case 81 is formed with a connection opening 84A and a discharge opening 84K for discharging dust at the top, and the connection opening 84A is formed in the suction air passage portion 56 (see FIG. 7). It is connected. The inside of the storage case 81 and the suction air passage portion 56 communicate with each other through the connection opening 84A.

  As shown in FIG. 10, the discharge opening 84 </ b> K is closed by a closing lid 450, and the closing lid 450 is urged rearward (leftward in FIG. 10) by a spring 401. Further, the closing lid 450 can move forward (rightward) against the biasing force of the spring 401, and the discharge opening 84K is opened by moving forward. The closing lid 450 is provided with a protrusion 450A, and the protrusion 450A protrudes into the storage case 81 from the discharge opening 84K.

  The discharge opening 84 </ b> K communicates with the introduction hole 153 </ b> B of the dust separator 52 by the communication member 403.

  In addition, a pair of protrusions (dust removing means) 88 spaced apart from each other are provided in the vicinity of the connection opening 84A of the front wall portion 84, and a peak portion 104A (to the upstream side) of the pleated filter 104 described later is provided. It is configured to come into contact with the protruding portion 104Ab of the mountain portion. A shaft 84J is formed at the center of the front wall 84 as shown in FIG.

  An inner peripheral wall surface of the storage case 81 serves as a dust receiving portion 86 that receives dust dropped from the pleated filter 104.

  As shown in FIG. 17, the pleated filter body 100 is configured to form a cylindrical frame body 101, a shaft portion 101A provided at the center position of the frame body 101, and radial pleats radially from the shaft portion 101A. A plurality of pleated bones 102 and 103, and a pleated filter 104 which is a filter formed by being attached to the pleated bones 102 and 103.

  As shown in FIG. 2, the shaft 84J of the front wall portion 84 is relatively rotatably inserted into the shaft hole 101Aa of the shaft portion 101A so that the pleat filter body 100 rotates about the shaft 84J. It has become.

  A cylindrical portion 110 having a short length as shown in FIG. 17 is formed at the rear end of the frame 101, and three small diameters having small diameters along the circumferential direction as shown in FIG. 18 are formed on the outer peripheral surface of the cylindrical portion 110. The surfaces 110A are formed at equal intervals. A large diameter surface 110B is formed between the small diameter surface 110A and the small diameter surface 110A.

  The small-diameter surface 110A and the large-diameter surface 110B are detected by the microswitch S1, and the microswitch S1 (not shown) is provided in the dust collection unit chamber 22 of the cleaner body 11. In this embodiment, for example, the microswitch S1 is turned on when the large diameter surface 110B is detected, and is turned off when the small diameter portion 110A is detected.

  A gear 107 is formed on the rear end surface of the cylindrical portion 110, and the gear 107 and the cylindrical portion 110 protrude outward from the storage case 81. The gear 107 is a drive gear Ga for the dust collection unit chamber 22 of the cleaner body 11. The pleated filter body 100 is rotated in the storage case 81 by driving the motor M.

  When the dust separation unit 400 is attached to the dust collection unit chamber 22 of the cleaner body 11, the gear 107 is engaged with the drive gear Ga. When the dust separation unit 400 is lifted from the dust collection unit chamber 22, the gear 107 is driven. Detaching from the Ga allows the dust separation unit 400 to be easily removed from the dust collection unit chamber 22.

  As shown in FIGS. 19 and 20, the sweeping body 300 is fitted to the shaft portion 101A of the pleat body 100 and rotates integrally with the shaft portion 101A. There are three arms 302 extending in the direction, and a sweeping member 303 provided at the tip of the arm 302. In FIG. 20, the two sweep members 303 are omitted.

  The tip of the sweeping member 303 is a first sliding contact portion 303A that slidably contacts the inner wall surface of the dust receiving portion 86 of the storage case 81 and scrapes up dust accumulated in the dust receiving portion 86. One side portion of the sweeping member 303 is a second sliding contact portion 303 </ b> B that slides on the front wall portion 84 of the storage case 81. Further, an inclined surface (guide inclined surface) 303C is formed on one surface of the sweeping member 303 to drop the dust scraped up by the first sliding contact portion 303A to the discharge opening 84K.

  The sweeping body 300 rotates as the pleated filter body 100 rotates, and this rotation causes the sweeping member 303 to move along the inner peripheral surface of the dust receiving portion 86 of the storage case 81 shown in FIG. The inner peripheral surface and the front wall surface 84 are slidably moved. By this sliding movement, the sweeping member 303 pushes up the dust collected in the dust receiving portion 86 to the discharge opening 84K.

  When the sweeping member 303 moves to the position of the discharge opening 84K, the sweeping member 303 presses the projection 450A of the closing lid 450 and moves the closing lid 450 forward against the biasing force of the spring 401. Then, the discharge opening 84K is opened.

  When the pleat filter body 100 is rotated and the sweep member 303 is in the position shown in FIG. 16, the microswitch S1 is switched from on to off, that is, the microswitch S1 is large in the cylindrical portion 110 of the pleat filter body 100. The attachment position of the microswitch S1 and the attachment position of the sweep body 300 with respect to the pleated filter body 100 are set so as to switch from the detection of the diameter portion 110B to the detection of the small diameter portion 110A.

  When the sweeping member 303 comes to the position shown in FIG. 16, the discharge opening 84 </ b> K is closed by the closing lid 450.

  Further, when the dust separation unit 400 is mounted in the dust collection unit chamber 22 of the cleaner body 11, the storage case 81 of the dust separation unit 400 is inserted into the front opening 25 </ b> B of the connection air passage portion 25 of the cleaner body 11 via the seal member 27. The rear end face is joined, and the inside of the storage case 81 and the suction opening 24 </ b> A of the electric blower 24 are communicated with each other through the connection air passage portion 25.

FIG. 21 is a block diagram showing the configuration of the control system of this vacuum cleaner. In FIG. 21, reference numeral 200 denotes a control device that controls the electric blower 24 and the motor M based on the operation of the operation switch 13a (see FIG. 1) of the operation unit 13A and the detection signal of the micro switch S1.
[Operation]
Next, operation | movement of the vacuum cleaner comprised as mentioned above is demonstrated.

  First, as shown in FIG. 2, the dust collection unit 50 is mounted in the dust collection unit chamber 22 of the cleaner body 11, and the dust collection hose 12 is connected to the connection port 11 </ b> A of the cleaner body 11 as shown in FIG. 1. At the same time, the suction port body 15 is connected to the hand operation tube 13 via the extension tube 14.

  Then, a power plug (not shown) is connected to the outlet. With this connection, the control device 200 (see FIG. 21) drives the motor M to rotate the pleated filter body 100 of the filter unit 80. As the pleated filter body 100 rotates, the sweep body 300 rotates, and the sweep member 303 of the sweep body 300 has its first sliding contact portion 303A slidingly moved on the peripheral surface of the dust receiving portion 86. The dust accumulated in the dust receiving portion 86 is pushed up along the peripheral surface.

  Thus, the sweeping member 303 pushes up the dust along the dust receiving portion 86 to the discharge opening 84K by the rotational movement, so that the push-up can be performed with a simple structure. Further, since the sweeping body 300 is rotated by the rotation of the pleated filter body 100, only one drive source is required, and a dedicated motor for the sweeping body 300 is not necessary.

  Then, when the sweeping member 303 comes to the position of the discharge opening 84K, the second sliding contact portion 303B of the sweeping member 303 presses the projection 450A of the closing lid 450 as shown in FIG. Establish.

  On the other hand, the dust scraped up by the first sliding contact portion 303A of the sweep member 303 is dropped onto the inclined surface 303C via the side surface 303D of the sweep member 303, and the dust is further discharged to the discharge opening 84K by the inclined surface 303C. Dropped and discharged. The dust dropped into the discharge opening 84K is returned into the separation chamber portion 54 from the introduction hole 153B of the dust separation portion 52 via the communication member 403.

  Then, when the sweep member 303 comes to the position shown in FIG. 16 due to the rotation of the pleat filter body 100, the microswitch S1 shifts from detection of the large diameter portion 110B of the cylindrical portion 110 of the pleat filter body 100 to detection of the small diameter portion 110A. As a result, the driving of the motor M is stopped. When the sweep member 303 moves to the position shown in FIG. 16, the pressing of the projection 450 </ b> A of the closing lid 450 by the second sliding contact portion 303 </ b> B of the sweeping member 303 is released, and the closing lid 450 is moved by the biasing force of the spring 401. The discharge opening 84K is closed.

  While the motor M is being driven, that is, until the discharge opening 84K is closed by the closing lid 450, the electric blower 24 is not driven even if the switch 13a of the operation portion 13A of the hand operation tube 13 is operated. Thereby, the dust discharged into the separation chamber portion 54 of the dust separation portion 52 is prevented from being sucked from the discharge opening 84K and attached to the pleat filter 104 again.

  When the switch 13a of the operation unit 13A of the hand operation tube 13 is operated, the electric blower 24 is driven. By driving the electric blower 24, air is sucked from the suction opening 24 </ b> A of the electric blower 24, a negative pressure acts in the storage case 81 of the dust collection unit 50 through the connection air passage portion 25, and the suction air passage It acts on the inside of the dust collecting case part 74 and the separation chamber part 54 of the dust separation part 52 via the part 56. The negative pressure acts on the dust collecting hose 12, the extension pipe 14 and the suction port body 15 via the guide air duct tube 57, and dust is sucked together with air from the suction port body 15.

  The sucked dust and air are sucked into the suction connection port 57a of the dust collecting unit 50 through the extension pipe 14 and the dust collecting hose 12. Dust and air sucked into the suction connection port 57a are introduced into the separation chamber portion 54 of the dust separation portion 52 through the guide air duct 57, and rotate counterclockwise in FIG. I will do it.

  As a result of this rotation, dust and air are separated by inertia, and the air passes through the net filter NF1 (see FIG. 10) of the dust separating means 55 and the net filter NF2 of the opening 154B, and further passes through the suction air passage portion 56 to the filter portion. Suction into the 80 storage cases 81 is performed.

  On the other hand, the separated dust is introduced together with a part of air into the communication case portion 72 of the dust collection portion 70 through the introduction opening 53A and the opening 72A of the separation chamber portion 54 due to inertial force. As shown in FIG. 24, the introduced dust and air are sucked into the dust collecting chamber 73 through the communication passage 71 of the communication case portion 72 and the intake port 600 (see arrow A).

  In the dust collection chamber 73, since the air path from the intake port 600 to the connection opening 75 faces downward, inertia force and gravity act on the dust contained in the air flowing through the air path, so that the dust is collected. The air is directed to the lower portion of the dust chamber 73 and the air is directed to the connection opening 75, and dust separated from the air is accumulated in the lower portion of the dust collection chamber 73 (see arrow B). In addition, dust that has traveled to the connection opening 75 together with air is captured by the net filter NF3 provided in the connection opening 75 and is prevented from passing through the connection opening 75. At this time, in the vacuum cleaner 10 of the present embodiment, the cover plate 170 is provided on the downstream side of the dust collection chamber 73 to form the air flow deceleration space 608, so that the upper portion of the connection opening 75 (net filter NF3). The air that has passed through the air flows toward the suction air passage section 56 via the air flow deceleration space 608 (see arrow C), and the air that has passed through the lower portion of the connection opening 75 (net filter NF3) passes through the air flow deceleration space 608. Without going to the suction air passage portion 56 (see arrow D).

  This is because the cover plate 170 does not allow the passage of air and covers the upper portion of the connection opening 75, so that the air flow that has passed through the upper portion of the net filter NF 3 is directed to the suction air passage portion 56 by the cover plate 170. In the air flow decelerating space 608, the air flow is directed to the opening 170A, and then to the suction air passage 56 through the opening 170A (see arrow C). However, the air flow that has passed through the lower portion of the net filter NF3 Is due to going toward the suction air passage 56 through the opening 170A without interfering with the cover plate 170 (see arrow D). For this reason, the air flow that has passed through the upper part of the net filter NF3 follows a detoured air passage that passes through the air flow deceleration space 608, and directly passes through the opening 170A without interfering with the cover plate 170, thereby causing the suction air passage portion 56 to flow. The air volume is reduced compared to the flow of air that has passed through the lower part of the net filter NF3 that follows the air path toward.

  Thus, in the dust collection chamber 73, a large amount of air flows under the connection opening 75, that is, under the net filter NF3. Therefore, the net filter NF3 captures dust from the air passing through the connection opening 75. Even when the net filter NF3 is clogged, clogging occurs from the lower side of the net filter NF3, and the volume in which dust can be accumulated in the dust collection chamber 73 due to the clogging generated in the net filter NF3. Can be minimized, and more dust can be accumulated in the dust collection chamber 73. This is due to the following reason.

  Since the dust collection chamber 73 is configured to collect dust at the lower part while discharging air from the connection opening 75 of the left side wall 74A, the air is stacked from the lower part until the air can no longer pass through the connection opening 75. The collected dust can be collected in a volume up to the vicinity of the upper end of the connection opening 75. However, in the conventional vacuum cleaner in which the cover plate 170 is not provided, the air discharged from the dust collection chamber 73 passes through the upper part of the connection opening 75 that is in the vicinity of the shortest distance from the intake port 600. A flow is formed, and clogging occurs from the upper part of the net filter NF3. Then, the range in which the air can pass through the net filter NF3, that is, the range in which the air can pass through the connection opening 75 is reduced from the upper side toward the lower side. Thereby, the position where air cannot pass through the connection opening 75 is displaced downward from the upper end of the connection opening 75 due to the clogging of the net filter NF3. For this reason, in the conventional dust collection chamber 73, when the net filter NF3 is clogged, dust collection is performed at a volume lower than the vicinity of the lower end position of the clogging range of the net filter NF3 that expands downward from the top. As a result, the volume capable of collecting dust decreases as the clogging range increases.

  On the other hand, in the electric vacuum cleaner 10 of the present embodiment, clogging occurs from the lower side of the net filter NF3, so that the air can pass through the net filter NF3, that is, the air passage through the connection opening 75. The range where this is possible is reduced from the bottom to the top. For this reason, in the dust collection chamber 73, even when the range of clogging in the net filter NF3 is expanded, the dust is stacked from the bottom, whereas the net filter NF3 extends over the entire surface of the connection opening 75. Since air can pass through until clogged, dust can be collected until the accumulated dust reaches the upper end of the connection opening 75 or the net filter NF3 is clogged over the entire surface. Therefore, in the vacuum cleaner 10, it can suppress to the minimum that the capacity | capacitance which can accumulate | store the dust in the dust collection chamber 73 resulting from clogging of the net filter NF3 is reduced.

  This is particularly effective in the following cases. In the dust collection chamber 73, as described above, if the filter is clogged and air cannot pass through the opening, dust cannot be collected. For this reason, by setting the area of the filter larger, for example, by setting the opening and the flow passage area of the filter larger than the flow passage area of the inlet, air cannot pass through the filter due to clogging. It is conceivable to reduce the probability. However, the air taken in from the upper intake port forms a flow that passes through the upper part of the opening on the side wall and goes to the outside of the dust collection chamber (downstream of the suction air passage), and flows downward from the upper part of the filter. The range of clogging will be expanded, and the increase in the flow path area of the filter cannot be used effectively. In such a case, if the air volume adjusting member is provided on the downstream side of the dust collecting chamber, the range of clogging of the filter is increased from the bottom to the top, and the direction in which dust accumulates and the clogging of the filter are increased. Since the direction of expansion matches, the dust collection chamber can collect dust until the clogging of the filter reaches the upper part, and the increase in the flow area of the filter is used to the maximum to reduce the probability of clogging. Can be obtained.

  The air sucked into the dust collection chamber 73 is sucked into the suction air passage section 56 through the net filter NF3 and the opening 170A below the cover plate 170, and further sucked into the storage case 81 of the filter section 80.

  The air sucked into the storage case 81 passes through the pleated filter 104 of the pleated filter body 100 and is sucked into the connection air passage portion 25 of the cleaner body 11 and further sucked into the suction opening 24A of the electric blower 24.

  Air sucked into the suction opening 24A of the electric blower 24 passes through the electric blower 24 and is exhausted from the exhaust port 20H of the cleaner body 11 shown in FIG.

  When the cleaning is completed, the operation of the electric blower 24 is stopped by operating the operation switch 13a of the operation unit 13A. When driving of the electric blower 24 is stopped, the control device 200 shown in FIG. The drive gear Ga is rotated by driving the motor M, and the pleated filter body 100 is rotated.

  Due to the rotation of the pleated filter body 100, the projection 88 of the front wall portion 84 of the storage case 81 hits the protruding portion 104Ab of the peak portion 104A of the pleated filter 104, and vibration is applied to the pleated filter 104 and adheres to the pleated filter 104. Dust is shaken off. This dust accumulates in the dust receiving part 86 of the storage case 81.

  Since the protrusion 88 is provided below the center of rotation of the pleated filter body 100, a large vibration is applied to the pleated filter 104 in the lower portion of the pleated filter body 100. For this reason, dust is shaken off from the lower pleat filter 104 and falls to the dust receiving portion 86 as it is, and it does not adhere to the pleat filter 104 again during the fall, and therefore it is efficient. Dust can be dropped.

  On the other hand, the sweeping body 300 rotates together with the pleated filter body 100, and the first sliding contact portion 303A of the sweeping member 303 of the sweeping body 300 slides on the inner peripheral surface of the dust receiving portion 86 of the storage case 81. I will do it. By this sliding movement, the dust accumulated in the dust receiving portion 86 is pushed up along the peripheral surface of the dust receiving portion 86 while being scraped up, and the sweep member 303 is moved to the position of the discharge opening 84K. Then, the discharge opening 84K is opened as described above (see FIG. 22), and the pushed up dust is discharged to the discharge opening 84K, and inside the separation chamber portion 54 of the dust separation portion 52 via the communication member 403. Returned to

  Then, for example, when the pleated filter body 100 rotates once and the sweep member 303 comes to the position shown in FIG. 16, the microswitch S1 detects the small diameter portion 110A from the detection of the large diameter portion 110B of the cylindrical portion 110 of the pleated filter body 100. , Thereby stopping the driving of the motor M and stopping the rotation of the pleated filter body 100. As described above, the discharge opening 84K is closed by the closing lid 450.

  Further, when the sweep member 303 of the sweeper 300 opens the discharge opening 84K, if the power plug is pulled out from the outlet, the driving of the motor M is stopped and the discharge opening 84K remains open. Thus, when the power plug is connected to the outlet, the motor M is driven to rotate the pleated filter body 100, and when the sweeping member 303 reaches the position shown in FIG. Since the outlet member 303 is stopped at the position shown in FIG. 16, the discharge opening 84K is closed by the closing lid 450, and thereafter the electric blower 24 is driven, so that the separation chamber portion 54 of the dust separation portion 52 is moved to. The problem of sucking the returned dust from the discharge opening 84K is prevented.

  Further, since the dust accumulated in the dust receiving portion 86 is returned to the separation chamber portion 54 of the dust separation portion 52 from the discharge opening 84K through the communication member 403 by the rotational movement of the sweep member 303, the pleat filter The dust collecting unit 410 may not be provided with a dedicated dust collecting unit for 104.

  When clogging occurs in the pleat filter 104 due to long-term use, the dust separation unit 400 is removed from the cleaner body 11 and the pleat filter 104 is cleaned.

  The dust separation unit 400 is removed after the dust collecting unit 410 is first removed from the cleaner body 11, but the drive gear Ga is set to a position below the rotation center position of the gear 107 of the pleated filter body 100. Thus, the gear 107 of the pleated filter body 100 is disengaged from the drive gear Ga simply by lifting the dust separation unit 400 upward without causing the drive gear Ga to get in the way. For this reason, the dust separation unit 400 can be easily removed from the dust collection unit chamber 22 of the cleaner body 11.

  Further, when the dust separation unit 400 is attached, if the dust separation unit 400 is inserted from above the dust collection unit chamber 22, the gear 107 of the pleat filter body 100 meshes with the drive gear Ga without causing the drive gear Ga to get in the way. The dust separation unit 400 can be easily attached to the dust collection unit chamber 22.

  In the above embodiment, the dust discharged from the discharge opening 84K is returned to the separation chamber portion 54 of the dust separation portion 52. However, the present invention is not limited to this, for example, to the guide air duct 57 upstream of the dust separation portion 52. You may return. Moreover, although what was applied to the inertia separation type vacuum cleaner was demonstrated, you may apply to the normal vacuum cleaner which uses a paper filter, for example.

  In the above-described embodiment, the dust attached to the pleated filter 104 is dropped by rotating the pleated filter body 100. However, the present invention is not limited to this, and vibration is applied to the pleated filter 104 without rotating the pleated filter body 100. It is also possible to drop dust.

  In the above embodiment, the canister type vacuum cleaner has been described. However, the present invention can also be applied to an upright type vacuum cleaner or a vacuum cleaner in which a dust separation unit is attached to a hand control tube.

  In the above-described embodiment, the cover plate 170 is used as the air volume adjusting means, and the air flow between the cover plate 170 and the upper part of the net filter NF3 provided in the connection opening 75 of the left side wall portion 74A of the dust collection chamber 73 is achieved. The air passing through the air flow deceleration space 608 is formed in the air that has passed through the upper part of the connection opening 75 that forms the deceleration space 608 and serves as the opening of the dust collection chamber 73, and the air that has passed through the lower part of the connection opening 75. By forming a flow that does not pass through the air flow deceleration space 608, the air volume of the air passage from the communication passage 71 to the suction air passage portion 56 is adjusted. As described above, if the air volume adjusting means forms an air flow deceleration space 608 through which the air passing through the upper part of the net filter NF3 passes and not through the air passing through the lower part of the net filter NF3, for example, It may be a filter that allows passage of air, or may be a wind direction plate that changes the flow of air, and is not limited to the above-described embodiment.

  In the above-described embodiment, the air flow deceleration space 608 is secured by the side wall ridge portion 601, but the upper part of the net filter NF3 and the air volume adjusting means (cover plate 170) are provided at a constant interval. However, the present invention is not limited to this embodiment. For example, the connection opening 74 is formed in the left side wall 74A without providing the side wall ridge portion 601 in the left side wall 74A of the dust collection chamber 73, and the left side wall is formed on the left side (suction air passage 56 side) of the left side wall 74A. The air volume adjusting means such as the cover plate 170 may be arranged at a distance from the portion 74A.

  The air volume adjusting member according to the present invention is not limited to the vacuum cleaner of the above-described embodiment, but is an opening formed on the side wall and fitted with a filter, taking in air containing dust from an intake port formed above. It can be applied if the dust collection chamber that collects dust at the bottom by discharging air from the section is a vacuum cleaner that constitutes a part of the suction air passage where the air containing dust is sucked by the electric blower Further, it is possible to minimize the reduction in the volume of dust that can accumulate in the dust collection chamber due to the clogging of the filter.

It is the perspective view which showed the external appearance of the electric vacuum cleaner which concerns on this invention. It is the longitudinal cross-sectional view which showed the structure of the cleaner body shown in FIG. It is the perspective view which showed the cleaner body which removed the dust collection unit. It is a longitudinal cross-sectional perspective view of the cleaner body shown in FIG. It is a longitudinal cross-sectional view of the cleaner body which removed the dust collection unit. It is the perspective view which showed the external appearance of the dust collection unit. It is a cross-sectional view of the dust collection unit shown in FIG. It is the perspective view seen from the other direction of the dust collection unit shown in FIG. It is the perspective view which showed the external appearance of the dust separation unit. It is the conceptual diagram which showed the front wall part of the storage case, the dust separation part, and the duct. It is the perspective view which showed the external appearance of the dust collection unit. It is the perspective view which looked at the dust collection unit of FIG. 11 from the other direction. It is the perspective view which showed the dust collection part unit which removed the cover body. It is the perspective view which showed the cover body. It is a top view of the dust collection unit of FIG. It is explanatory drawing which showed the storage case and the sweeping body. It is the side view which showed the pleated filter body. It is explanatory drawing which showed the shape of the cylindrical part of the pleat filter body shown in FIG. It is the front view which showed the sweeping body. It is a perspective view of the sweeping body shown in FIG. It is the block diagram which showed the structure of the control system of a vacuum cleaner. It is explanatory drawing which showed the state by which the discharge opening was opened by the sweep member. It is the perspective view which showed the dust separation part. It is a figure for demonstrating a dust collection chamber and an air volume adjustment member, and is the cross-sectional view which expanded partially FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vacuum cleaner 24 Electric blower 73 Dust collection chamber 74A Left side wall part 75 (as a side wall of a dust collection chamber) Connection opening 170 (As an opening part of the side wall of a dust collection chamber) 170 Cover plate
600 Inlet 608 Air flow deceleration space NF3 Net filter (as opening filter)

Claims (3)

An electric blower that sucks dust together with air into the suction air passage;
A dust collection chamber for collecting dust by flowing the dust together with air from an upper intake port in the middle of the suction air passage ;
A side wall of the dust collection chamber provided with an opening located below the intake ;
And a filter that has been attach to the opening,
An air flow rate adjusting unit which is provided on the downstream side of the upper part of the filter and forms an air flow deceleration space between the upper part of the filter and reduces the flow rate passing through the upper part of the filter, compared to the flow rate passing through the lower part ; vacuum cleaner, characterized in Rukoto equipped with. The vacuum cleaner according to claim 1, wherein the air volume adjusting unit is a plate member that is disposed at a predetermined interval from the filter and covers an upper portion of the filter. A communication case portion having a communication path extending in a substantially horizontal direction in the middle of the suction air passage,
The dust collection chamber extends downward from one end portion of the communication case portion through the intake port,
The vacuum cleaner according to claim 1, wherein the opening allows air to flow out in a direction different from a flow direction in the communication path.

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