JP2014128393A - Vacuum cleaner and dust separating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner which suppresses noise caused by swirl flow while suppressing separation performance when the volume of air flowing into a dust collection container is large, and improves the separation performance when the volume of the air flowing into the dust collection container is small: and to provide a dust separation device.SOLUTION: A vacuum cleaner 1 includes: a dust collection container 39 as a circular cylinder-shaped tube; an air suction port 46 making air flow into the dust collection container 39 in a direction where a swirl flow F is caused; a first separation part exhaust port 55 disposed concentrically to the dust collection container 39 and making the air flow out through the center part of the swirl flow F; and a wind velocity adjustment part 47 changing wind velocity of the air flowing into the dust collection container 39 through the air suction port 46.

Description

  Embodiments according to the present invention relate to a vacuum cleaner and a dust separator.

  2. Description of the Related Art Conventionally, a cyclone type dust separation device that generates a swirling flow in a cylindrical dust collecting container and separates dust from air, and a vacuum cleaner equipped with the dust separation device are known.

JP 2010-43322 A

  A cyclone type dust separation device separates dust from air by centrifugal force generated by a swirling flow.

  By the way, the conventional cyclone type dust separator is provided with the inlet port which makes air flow in into a dust collecting container. The flow passage cross-sectional area of the intake port is an important factor that determines the separation performance and noise level of the dust separation device. For example, if the dust separation device has a relatively large flow passage cross-sectional area of the intake port, the wind speed of the swirling flow is lowered and the separation performance is lowered, while noise is suppressed. On the other hand, in the dust separation device, if the flow path cross-sectional area of the intake port is made relatively small, the wind speed of the swirling flow is increased, the separation performance is improved, and the noise is increased. That is, in the dust separator, the high separation performance and the low noise are in a contradictory relationship.

  However, since the conventional cyclone type dust separator has a constant flow passage cross-sectional area of the intake port, for example, the electric blower in any one of the strong operation mode, the medium operation mode, and the weak operation mode If the accumulated amount of dust increases and the pressure loss in the air passage increases, the air volume flowing into the dust collection container decreases and the noise caused by the swirling flow decreases, but the separation occurs. Performance decreases. On the other hand, the conventional cyclone type dust separation device, if dust is discarded and the pressure loss in the air passage becomes small, even in the same operation mode as before dust disposal, the air volume of the air flowing into the dust collection container Increase (or recovery) increases separation performance, while noise caused by swirling flow increases.

  In other words, since the flow passage cross-sectional area of the intake port is fixed, the conventional cyclone dust separation device can be used with a moderate balance between the separation performance and the noise level. (Air flow range of air flowing into the dust collection container) was extremely narrow. The balance between the high separation performance and the noise level means that the separation performance and noise do not change significantly regardless of the amount of accumulated dust (large or small) in the dust separation device. .

  Therefore, the present invention suppresses noise caused by the swirling flow while suppressing the separation performance when the air volume of the air flowing into the dust collection container is large, and improves the separation performance when the air volume of the air flowing into the dust collection container is small. A vacuum cleaner and a dust separator are proposed.

  In order to solve the above problems, an electric vacuum cleaner according to an embodiment of the present invention provides a cylindrical tubular body, an intake port for allowing air to flow in a direction in which a swirling flow is generated in the tubular body, and the tubular body. An exhaust port that is arranged concentrically and allows air to flow out from the central portion of the swirling flow; and a wind speed adjusting unit that changes the wind speed of the air flowing into the cylindrical body from the intake port.

  The dust separation device according to the embodiment of the present invention includes a cylindrical cylinder, an air inlet that allows air to flow in a direction in which a swirling flow is generated in the cylinder, and is disposed concentrically with the cylinder. An exhaust port through which air flows out from the central portion of the swirl flow; and a wind speed adjusting unit that changes the wind speed of the air flowing into the cylindrical body from the intake port.

The perspective view which shows the external appearance of the vacuum cleaner which concerns on embodiment of this invention. 1 is an external perspective view showing a dust separation device according to an embodiment of the present invention. Sectional drawing which shows the dust separation apparatus which concerns on embodiment of this invention. The disassembled perspective view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention. The cross-sectional view which shows the dust separation apparatus which concerns on embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Embodiments of a dust separation device and a vacuum cleaner according to the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an external appearance of a vacuum cleaner according to an embodiment of the present invention.

  As shown in FIG. 1, the vacuum cleaner 1 according to the present embodiment is a so-called canister-type vacuum cleaner. The vacuum cleaner 1 includes a vacuum cleaner body 2 that can travel on a surface to be cleaned, and a pipe portion 3 that is detachable from the cleaner body 2.

  The vacuum cleaner main body 2 includes a main body case 5, a pair of wheels 6 disposed on both sides of the main body case 5, an electric blower 7 accommodated in the latter half portion of the main body case 5, and a front half portion of the main body case 5. A detachable dust separating device 8 disposed, a main body control unit 9 mainly controlling the electric blower 7, and a power cord 11 for guiding electric power to the electric blower 7 are provided.

  A main body connection port 12 is provided at the front end portion of the main body case 5. The main body connection port 12 is a joint, and the pipe portion 3 can be attached and detached. The main body connection port 12 is a fluid inlet of the vacuum cleaner main body 2 and fluidly connects the pipe portion 3 and the dust separation device 8.

  The wheel 6 is a large-diameter traveling wheel.

  The electric blower 7 sucks air from the dust separation device 8 and makes the tube portion 3 have a negative pressure.

  The dust separation device 8 separates dust from air containing dust (hereinafter referred to as “dust-containing air”) flowing from the surface to be cleaned through the tube portion 3 by the negative pressure generated by the electric blower 7. On the other hand, the dust separator 8 sends clean air from which dust has been removed to the electric blower 7. The dust separator 8 also collects and accumulates the separated dust.

  The dust separation device 8 has a substantially cylindrical shape as a whole. The dust separating device 8 leans against the cleaner main body 2 in a posture in which the bottom is shifted to the front side and the top is moved rearward with respect to the cleaner main body 2 and slightly tilted backward. The dust separator 8 is detachably fixed to the cleaner body 2.

  The main body control unit 9 includes a microprocessor (not shown) and a storage device (not shown) for storing various arithmetic programs executed by the microprocessor, parameters, and the like. The storage device stores a plurality of operation modes set in advance. The plurality of operation modes set in advance correspond to user operations accepted by the pipe section 3. Each operation mode is set with different input values (input values of the electric blower 7). In response to a user operation accepted by the pipe unit 3, the main body control unit 9 selectively selects an arbitrary operation mode corresponding to the operation content from a plurality of preset operation modes and reads out from the storage unit The electric blower 7 is controlled according to the read operation mode.

  The power cord 11 supplies power to the cleaner body 2 from a wiring plug connector (not shown, so-called outlet). The power cord 11 has a plug 14 at the free end.

  The pipe portion 3 sucks dust-containing air from the surface to be cleaned by the negative pressure acting from the cleaner body 2 and guides it to the cleaner body 2. The pipe section 3 includes a connection pipe 19 as a joint that is detachable from the main body connection port 12 of the cleaner body 2, a dust collection hose 21 that is fluidly connected to the connection pipe 19, and a fluid connection to the dust collection hose 21. The hand operation tube 22 to be connected, the grip portion 23 protruding from the hand operation tube 22, the operation portion 24 provided on the grip portion 23, the extension tube 25 detachably attached to the hand operation tube 22, and the attachment / detachment to the extension tube 25 And a free suction port body 26.

  The connection pipe 19 is fluidly connected to the dust separation device 8 through the main body connection port 12.

  The dust collection hose 21 is a long and flexible substantially cylindrical hose. One end of the dust collecting hose 21 (here, the rear end) is fluidly connected to the connecting pipe 19. The dust collection hose 21 is fluidly connected to the dust separation device 8 through the connection pipe 19.

  The hand operation tube 22 relays the dust collecting hose 21 and the extension tube 25. One end (here, the rear end) of the hand operating tube 22 is fluidly connected to the other end (here, the front end) of the dust collecting hose 21. The hand operating tube 22 is fluidly connected to the dust separating device 8 through the dust collecting hose 21 and the connecting tube 19 sequentially.

  The grip portion 23 is a portion that can be gripped by the user's hand in order to operate the vacuum cleaner 1. The grip portion 23 has an appropriate shape that can be easily gripped by the user's hand and protrudes from the hand operation tube 22.

  The operation unit 24 includes a switch associated with each operation mode. Specifically, the operation unit 24 includes a stop switch 24 a associated with an operation stop operation of the electric blower 7 and an activation switch 24 b associated with an operation start operation of the electric blower 7. The stop switch 24 a and the start switch 24 b are electrically connected to the main body control unit 9. A user of the vacuum cleaner 1 can alternatively select an operation mode of the electric blower 7 by operating the operation unit 24. The start switch 24b also functions as an operation mode selection switch during operation of the electric blower 7. In this case, every time the operation signal is received from the start switch 24b, the main body control unit 9 switches the operation mode in the order of strong → medium → weak → strong →. Note that the operation unit 24 may individually include a weak operation switch (not shown), a medium operation switch (not shown), and a strong operation switch (not shown) instead of the start switch 24b.

  The extension tube 25 is an elongated substantially cylindrical tube that can be expanded and contracted. The extension tube 25 has a telescopic structure in which a plurality of cylindrical bodies are overlapped. One end portion (here, the rear end portion) of the extension tube 25 and the other end portion (here, the front end portion) of the hand operation tube 22 have a detachable joint structure. The extension pipe 25 is fluidly connected to the dust separation device 8 through the hand operation pipe 22, the dust collection hose 21 and the connection pipe 19.

  The suction port body 26 has a structure capable of running or sliding on a surface to be cleaned such as a wooden floor or a carpet, and has a suction port 28 on the bottom surface facing the surface to be cleaned in the running state or the sliding state. The suction port body 26 includes a rotatable rotary cleaning body 29 disposed in the suction port 28 and an electric motor 31 that drives the rotary cleaning body 29. One end portion (here, the rear end portion) of the suction port body 26 and the other end portion (here, the front end portion) of the extension pipe 25 have a detachable joint structure. The suction port body 26 is fluidly connected to the dust separation device 8 through the extension pipe 25, the hand operation pipe 22, the dust collection hose 21, and the connection pipe 19.

  The vacuum cleaner 1 starts the electric blower 7 when the operation with respect to the starting switch 24b is received. For example, when the vacuum cleaner 1 receives an operation on the start switch 24b while the electric blower 7 is stopped, the electric blower first operates the electric blower 7 in the strong operation mode, and receives an operation on the start switch 24b again. 7 is operated in the medium operation mode, and when an operation to the start switch 24b is accepted three times, the electric blower 7 is operated in the weak operation mode, and the same is repeated thereafter. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes set in advance, and the input value to the electric blower 7 is small in the order of the strong operation mode, the medium operation mode, and the weak operation mode. The started electric blower 7 exhausts air from the dust separation device 8 to make the inside negative pressure (suction negative pressure).

  The negative pressure of the dust separator 8 acts on the suction port 28 of the suction port body 26 through the main body connection port 12, the connection tube 19, the dust collection hose 21, the hand operation tube 22 and the extension tube 25. The vacuum cleaner 1 cleans the surface to be cleaned by sucking dust on the surface to be cleaned together with air with a negative pressure acting on the suction port 28. The dust separation device 8 separates and accumulates dust from the dust-containing air sucked into the vacuum cleaner 1. On the other hand, the dust separator 8 sends the air separated from the dust-containing air to the electric blower 7. The electric blower 7 exhausts the air sucked from the dust separator 8 to the outside of the cleaner body 2.

  Next, the dust separator 8 will be described in detail.

  In addition, although the dust separation apparatus 8 is being fixed with the attitude | position inclined back with respect to the cleaner body 2, in order to demonstrate easily, it is standing and illustrated.

  FIG. 2 is an external perspective view showing the dust separator according to the embodiment of the present invention.

  FIG. 3 is a cross-sectional view showing the dust separation device according to the embodiment of the present invention.

  FIG. 4 is an exploded perspective view showing the dust separator according to the embodiment of the present invention.

  As shown in FIGS. 2 to 4, the dust separation device 8 according to the present embodiment has a substantially cylindrical shape. The dust separator 8 includes a first separator 35 that separates coarse dust from the air guided to the dust separator 8, a second separator 36 that separates fine dust from the air that has passed through the first separator 35, and a first separator 36. An exhaust pipe 37 that sends the air that has passed through the two separation sections 36 from the dust separation device 8 to the cleaner body 2 and a cover 38 that covers the exhaust pipe 37 are provided.

  The first separation unit 35 is disposed in one half (specifically, the lower half) of the dust separation device 8. The second separator 36, the exhaust pipe 37, and the cover 38 are disposed in the other half (specifically, the upper half) of the dust separator 8.

  The dust collecting container 39 of the first separation unit 35, the side wall 41 of the second separation unit 36, and the cover 38 cooperate to adjust the appearance of the entire dust separation device 8 to a substantially cylindrical shape.

  Note that coarse dust is mainly fibrous dust such as lint and cotton dust and dust having a large particle size such as sand particles, and fine dust is dust having a particle shape or powder and a small particle size.

  The first separation unit 35 separates dust from the air by a centrifugal separation method (cyclone method). The first separation unit 35 includes a removable dust collection container 39 that also serves as an outer shell of the first separation unit 35 and accumulates dust separated by the first separation unit 35, and an inner cylinder disposed in the dust collection container 39. 42, a dust capturing cup 43 disposed in the dust collecting container 39 and supported by the inner cylinder 42, and a handle 45 provided on the outer surface of the side wall of the dust collecting container 39. The first separation portion 35 does not necessarily require the inner cylinder 42 to the extent that coarse dust can be prevented from flowing downstream.

  The dust collecting container 39 has a cup-like cylindrical shape with one end opened. The dust collecting container 39 also serves as the outer shell of one half of the dust separator 8. The dust collecting container 39 includes an air inlet 46 and a wind speed adjusting unit 47 on the side wall. The dust collecting container 39 includes a large diameter portion 48 positioned at the opening end, a small diameter portion 49 that has a smaller diameter than the large diameter portion 48, and that reaches the bottom wall with a substantially uniform diameter dimension connected to the large diameter portion 48. .

  The non-opening end of the large diameter portion 48, that is, the connecting portion with the small diameter portion 49 is an inclined surface that narrows toward the small diameter portion 49.

  The dust collecting container 39 is detachably fixed to the dust separating device 8 by fitting a protrusion 51 provided near the opening end into a groove 52 provided on the connecting end side of the second separating portion 36. ing. The groove 52 extends in the circumferential direction with respect to the substantially cylindrical dust separating device 8.

  The inner cylinder 42 is accommodated in the dust collecting container 39 and is arranged substantially concentrically. A space that separates the inner cylinder 42 and the dust collecting container 39 is a separation chamber 53 in which the air flowing into the first separating portion 35 from the air inlet 46 of the dust collecting container 39 is swirled to separate dust and air.

  The inner cylinder 42 has a root part fixed to the second separation part 36 and a free end part extending into the dust collecting container 39. The inner cylinder 42 fluidly connects the first separation part 35 and the second separation part 36 via the first separation part exhaust port 55. The inner cylinder 42 has a second opening 56 for allowing air to flow out of the first separation portion 35 on the side wall. A mesh filter 57 is provided in the second opening 56. The side wall of the inner cylinder 42 faces the air inlet 46.

  The mesh filter 57 is naturally removed from the first separation unit 35 during a period when the swirling flow F in the separation chamber 53 is not sufficiently developed, such as immediately after the start of the electric blower 7 or during a stop transition, and also after the swirling flow F has developed. Prevents coarse dust from flowing out.

  The dust capturing cup 43 is provided at the free end of the inner cylinder 42. The dust trapping cup 43 has a bottomed cylindrical shape, and has a bottom wall connected to the free end of the inner cylinder 42 and a side wall extending toward the bottom wall of the dust collecting container 39. The dust capturing cup 43 is opened toward the bottom wall of the dust collecting container 39. The side wall of the dust catching cup 43 faces the side wall of the dust collecting container 39 with a gap. The dust trapping cup 43 has a diameter larger than that of the inner cylinder 42 and has a third opening 58 at the peripheral edge portion of the bottom wall that is connected to the free end of the inner cylinder 42.

  A gap separating the dust capturing cup 43 and the dust collecting container 39 is a dust collecting portion 59 in which the dust separated by the first separating portion 35 is accumulated. The air in the dust collector 59 returns to the separation chamber 53 through the third opening 58.

  The mesh filter 60 is provided in the third opening 58. The mesh filter 60 may be a filter that is coarse enough to prevent coarse dust (fibers such as lint and cotton dust) flowing into the dust collecting portion 59 from returning to the separation chamber 53.

  When the dust collecting container 39 is removed from the dust separating device 8, the inner cylinder 42 and the dust catching cup 43 come out of the dust collecting container 39 along with the second separating portion 36.

  The second separator 36 includes a side wall 41 corresponding to a part of the outer shell of the other half of the dust separator 8. The second separation unit 36 separates fine dust that passes through the first separation unit 35 from the air and prevents it from reaching the electric blower 7. The second separation portion 36 is connected to one end portion of the dust collecting container 39 and closes the opening 62. The second separation portion 36 surrounds the avoidance region 63 on the extension line of the center line C of the dust collecting container 39 or at a portion corresponding to the centroid of the second separation portion 36 with the avoidance region 63 therebetween. The second separation unit 36 separates dust from the air flowing in from the first separation unit 35 and causes the air to flow out to the unconnected end portion side. The second separation unit 36 supports the inner cylinder 42 on the center line C of the dust collecting container 39.

  The second separation portion 36 includes a guide pipe 65 that partitions an air passage that guides air flowing from the inner side of the inner cylinder 42 of the first separation portion 35 to the non-connected end portion side of the second separation portion 36, and an inner periphery of the cover 38. A plurality of cyclone portions 66 disposed in the vicinity of the surface and a dust trap umbrella 67 are provided.

  The air passage in the guide tube 65 (the air passage that guides the air flowing from the inner side of the inner cylinder 42 of the first separation portion 35 to the unconnected end portion side of the second separation portion 36) is the second of the exhaust pipe 37. The portion bent toward the separation portion exhaust port 68 also serves as an avoidance region 63 that is accommodated in a portion corresponding to the centroid of the second separation portion 36. That is, the avoidance region 63 uses an air path that guides air from the inside of the inner cylinder 42 to the second separation portion 36.

  The boundary between the air passage in the guide tube 65 and the air passage inside the inner cylinder 42 is the first separation portion exhaust port 55, and the air is caused to flow out from the first separation portion 35 to be supplied to the second separation portion 36. Let it flow.

  Each cyclone portion 66 has a centrifuge-shaped frustoconical inner surface 69 that generates a spiral flow. Each cyclone part 66 surrounds the avoidance area | region 63, and is located in a substantially cyclic | annular form. Each cyclone portion 66 discharges the separated dust to the vicinity of the inner edge of the opening 62 of the dust collecting container 39. The frustoconical inner surface 69 is reduced in diameter from the non-connecting end portion side of the second separating portion 36 toward the connecting end portion side. The non-connecting end side of the frustoconical inner surface 69 has an opening 70 fluidly connected to the guide tube 65. Further, the non-connected end portion side of the frustoconical inner surface 69 has a top opening 71 fluidly connected to the exhaust pipe 37. The connecting end portion side of the truncated conical inner surface 69 has an opening 72 that is fluidly connected to the dust collecting container 39 and discharges the separated dust. The air flowing into the cyclone 66 from the opening 70 creates a spiral spiral flow toward the opening 72 and separates fine dust from the air. The clean air from which the dust has been separated flows on the center line of the spiral spiral flow (the center line of the frustoconical inner surface 69) and flows out from the top opening 71 to the exhaust pipe 37.

  The dust trap umbrella 67 also serves as a partition that partitions the first separation portion 35 and the second separation portion 36, and is provided at the base of the inner cylinder 42. The dust trap umbrella 67 has an outer diameter that is smaller than the second separation portion 36 and larger than the inner cylinder 42. The dust trap umbrella 67 has one surface 73 that guides the dust collected by the cyclone portion 66 to the dust collection container 39 and the other surface 75 that spreads and inclines into the dust collection container 39.

  Further, the dust trap umbrella 67 hits the connecting portion of the large diameter portion 48 and the small diameter portion 49 of the dust collection container 39 to close the dust collection container 39. The large-diameter portion 48 and the dust trapping umbrella 67 of the dust collecting container 39 partition the fine dust collecting chamber 76 that accumulates dust discharged by the cyclone portion 66. The fine dust collection chamber 76 is a substantially wedge-shaped space that is sandwiched between the inclined surface of the large-diameter portion 48 and one surface 73 of the dust capturing umbrella 67 and becomes narrower as the distance from the cyclone portion 66 increases.

  The other surface 75 is larger in diameter than the inner cylinder 42 and the dust trapping cup 43 and is expanded toward the inner cylinder 42 and the dust trapping cup 43.

  The second separation portion 36 opens while partitioning a part of the guide tube 65, a base member 77 having an avoidance region 63 to be the guide tube 65, a cylindrical main body member 78 having a truncated cone-shaped inner surface 69 of the cyclone portion 66, and the guide tube 65. 70, and a partition member 79 having a top opening 71 and closing the frustoconical inner surface 69.

  The base member 77 includes dust trapping ribs 81 that surround the openings 72 of the plurality of cyclone portions 66 and extend into the dust collecting container 39. The dust trapping rib 81 has a smaller diameter than the second separation portion 36 and a larger diameter than the dust trapping umbrella 67.

  The second separation unit 36 may be a pleated filter instead of the cyclone unit 66. In this case, the pleated filter has an annular shape surrounding the periphery of the avoidance region 63, separates dust from the air flowing in from the connecting end portion side, and causes the air to flow out to the non-connecting end portion side.

  The exhaust pipe 37 enters the avoidance region 63 from the non-connected end portion side of the second separation portion 36 toward the first separation portion 35, and extends from the center line C of the dust collection container 39 (center line of the dust separation device 8). Turn in the direction that intersects with). The exhaust pipe 37 includes a recess 82 that is recessed toward the avoidance region 63. The exhaust pipe 37 exhausts the air flowing from the second separation part 36 to the second separation part exhaust port 68 arranged in parallel with the second separation part 36. The exhaust pipe 37 covers the unconnected end portion side of the cyclone portion 66 and collects the air flowing out from the top opening 71 of the cyclone portion 66 toward the center side of the dust separation device 8. The collected air once travels toward the first separation portion 35 by the recess 82, and then turns to a substantially right angle to reach the second separation portion exhaust port 68.

  The exhaust pipe 37 includes a common partition member 83 shared by the cover guide member 65 and the exhaust pipe 37 and a cover member 85 that covers the cover exhaust pipe 37 and covers the common partition member 83. A portion of the exhaust pipe 37 that enters the avoidance region 63 and is bent toward the second separation portion exhaust port 68 is provided in the base member 77.

  Next, the first separation unit 35 will be further described in detail.

  5 and 6 are cross-sectional views showing the dust separator according to the embodiment of the present invention.

  FIG. 5 shows a state where the wind speed adjusting unit 47 is fully closed, and FIG. 6 shows a state where the wind speed adjusting unit 47 is fully opened.

  As shown in FIGS. 5 and 6, the first separation unit 35 of the dust separation device 8 according to the present embodiment includes a dust collection container 39 as a cylindrical tube, and a swirling flow F in the dust collection container 39. An air inlet 46 that allows air to flow in the direction in which it is generated, a first separation portion exhaust port 55 that is arranged concentrically with respect to the dust collecting container 39 and that allows air to flow out from the central portion of the swirling flow F, and dust collection from the air inlet 46. A wind speed adjusting unit 47 that changes the wind speed of the air flowing into the container 39.

  The dust collecting container 39 guides the air flowing into the separation chamber 53 from the air inlet 46 along the inner peripheral surface 39a, and generates the swirling flow F.

  The air inlet 46 is provided on the outer peripheral surface 39 b of the dust collecting container 39. The air inlet 46 is a tubular air passage extending along the circumferential surface of the dust collecting container 39, in other words, connected along the tangent line of the circumferential surface of the dust collecting container 39. Note that the direction in which the air inlet 46 extends is not necessarily the tangential direction of the circumferential surface of the dust collecting container 39, and the swirling flow F is directed to the separation chamber 53 so as to be directed away from the center of the dust collecting container 39. It only needs to be generated.

  The intake port 46 extends along the circumferential surface of the dust collection container 39, and has a side wall portion 46a that follows a tangent to the circumferential surface of the dust collection container 39, and a circle of the dust collection container 39 that faces the side wall portion 46a. A side wall portion 46b that protrudes from the circumferential surface and abuts against a tangent to the circumferential surface of the dust collecting container 39.

  A connection point A between the side wall 46 a and the inner peripheral surface 39 a of the dust collecting container 39 is a starting point of the outer peripheral edge of the swirling flow F. The connection location B between the side wall portion 46b and the inner peripheral surface 39a of the dust collecting container 39 becomes the starting point of the inner peripheral edge of the swirling flow F when the wind speed adjusting portion 47 is fully opened. However, the outer peripheral edge and the inner peripheral edge of the swirl flow F do not become clear boundaries due to the disturbance of the swirl flow F, but are virtual.

  The side wall portion 46b extends following the tangent to the circumferential surface of the inner cylinder 42 of the dust separation device 8. Note that the direction in which the side wall 46b extends does not necessarily follow the tangent to the circumferential surface of the inner cylinder 42, and faces the inner cylinder 42 from the air path in the inlet 46 when viewed in the extending direction of the inlet 46. It may be something that can be done.

  The inner cylinder 42 (inner cylinder) has an outer peripheral surface 42 a on which air flowing into the dust collecting container 39 from the inlet 46 is blown when the flow path cross-sectional area of the inlet 46 is maximum, and is concentric in the dust collecting container 39. And is fluidly connected to the first separation part exhaust port 55.

  The wind speed adjusting unit 47 changes the flow path cross-sectional area of the intake port 46 to increase or decrease the wind speed of the air flowing into the separation chamber 53. The wind speed adjusting unit 47 is provided at a connection portion between the air inlet 46 and the dust collecting container 39.

  Further, the wind speed adjusting unit 47 maintains the position of the outermost edge of the swirling flow F and changes the position of the inner peripheral edge of the swirling flow F to change the flow path cross-sectional area of the intake port 46. The position of the outermost edge of the swirling flow F depends on the connection location A between the side wall portion 46 a and the inner peripheral surface 39 a of the dust collecting container 39. That is, the wind speed adjusting unit 47 changes the position of the inner peripheral edge of the swirling flow F while keeping the connection portion A as the outermost edge of the swirling flow F. In other words, the wind speed adjusting unit 47 brings the inner peripheral edge of the swirling flow F closer to the center line of the dust collecting container 39 as the opening degree increases and the cross-sectional area of the intake port 46 increases.

  Further, the wind speed adjusting unit 47 increases the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 from the intake port 46 increases. Specifically, the wind speed adjusting unit 47 includes an elastic member 86 that interlocks the flow path cross-sectional area of the intake port 46 with the air volume of the air flowing into the dust collecting container 39 from the intake port 46.

  The elastic member 86 is a plate material having a uniform thickness made of synthetic rubber such as natural rubber or silicone rubber. The elastic member 86 is connected to the fixed end 86a arranged on the side B connecting the side wall 46b and the inner peripheral surface 39a of the dust collecting container 39, and to the connecting point between the side wall 46a and the inner peripheral surface 39a of the dust collecting container 39. And a free end 86b disposed on the A side. When the flow rate of the air flowing into the separation chamber 53 from the intake port 46 increases, the elastic member 86 bends into the separation chamber 53 with the fixed end 86a as a fulcrum, and enlarges the cross-sectional area of the intake port 46.

  When the flow rate of air flowing into the separation chamber 53 from the intake port 46 is zero, the air speed adjusting unit 47 minimizes the opening (ie, fully closed) and minimizes the cross-sectional area of the intake port 46. It is not always necessary to close the intake port 46 (channel cross-sectional area = 0).

  The wind speed adjusting unit 47 configured in this manner increases the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 increases. Then, the wind speed of the swirl flow F is reduced as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Therefore, the first separation unit 35 suppresses noise caused by the swirling flow F while suppressing an increase in separation performance even if the air volume of the air flowing into the dust collecting container 39 is large.

  On the other hand, when the air volume of the air flowing into the dust collecting container 39 is reduced, the wind speed adjusting unit 47 reduces the flow path cross-sectional area of the intake port 46. Then, the wind speed of the swirling flow F is improved as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Accordingly, the first separation unit 35 can improve the separation performance when the air volume of the air flowing into the dust collecting container 39 is small. Note that the noise at this time is small in the first place because the air volume of the air flowing into the dust collecting container 39 is small.

  Next, another example of the dust separation device 8 according to the embodiment will be described. In the dust separators 8A, 8B, and 8C described in each example, the same components as those in the dust separator 8 are denoted by the same reference numerals, and redundant description is omitted.

  7 and 8 are cross-sectional views showing the dust separator according to the embodiment of the present invention.

  FIG. 7 shows a state in which the wind speed adjusting unit 47A is fully closed, and FIG. 8 shows a state in which the wind speed adjusting unit 47A is half open. The fully open wind speed adjustment unit 47A is the same as in FIG.

  As shown in FIGS. 7 and 8, the first separation unit 35A of the dust separation device 8A according to the present embodiment includes a dust collection container 39, an intake port 46, a first separation unit exhaust port 55, and an intake port 46. And a wind speed adjusting unit 47A that changes the wind speed of the air flowing into the dust collecting container 39.

  The wind speed adjustment unit 47 </ b> A changes the flow path cross-sectional area of the intake port 46 to increase or decrease the wind speed of the air flowing into the separation chamber 53. The wind speed adjusting unit 47A is provided at a connection portion between the air inlet 46 and the dust collecting container 39.

  Further, the wind speed adjusting unit 47A maintains the position of the outermost edge of the swirling flow F and changes the position of the inner peripheral edge of the swirling flow F to change the flow path cross-sectional area of the intake port 46. The position of the outermost edge of the swirling flow F depends on the connection location A between the side wall portion 46 a and the inner peripheral surface 39 a of the dust collecting container 39. That is, the wind speed adjusting unit 47A changes the position of the inner peripheral edge of the swirling flow F while keeping the connection portion A as the outermost edge of the swirling flow F. In other words, the wind speed adjusting unit 47A brings the inner peripheral edge of the swirling flow F closer to the center line of the dust collecting container 39 as the opening degree increases and the cross-sectional area of the intake port 46 increases.

  Further, the wind speed adjusting unit 47A increases the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 from the intake port 46 increases. Specifically, the wind speed adjusting unit 47A includes an elastic member 86A that interlocks the flow passage cross-sectional area of the intake port 46 with the air volume of the air flowing into the dust collecting container 39 from the intake port 46.

  The elastic member 86A is a plate material made of synthetic rubber such as natural rubber or silicone rubber. The elastic member 86A includes an elastic member 86A, a fixed end 86a disposed on the side where the side wall portion 46b and the inner peripheral surface 39a of the dust collecting container 39 are connected to each other, and an inner peripheral surface of the side wall portion 46a and the dust collecting container 39. And a free end 86b disposed on the side of the connection point A with 39a. When the flow rate of the air flowing into the separation chamber 53 from the intake port 46 increases, the elastic member 86A bends into the separation chamber 53 with the fixed end 86a as a fulcrum, and enlarges the flow path cross-sectional area of the intake port 46.

  The elastic member 86A includes a high-rigidity portion 86c having a uniform thickness and a low-rigidity portion 86d that is thinner than the high-rigidity portion 86c. The low-rigidity portion 86d is a groove-shaped notch. The elastic member 86A bends so as to be bent at the low rigidity portion 86d. Thereby, the elastic member 86A changes the ease of bending with respect to the air volume of the air flowing into the dust collecting container 39 from the intake port 46, compared with the elastic member 86 having a uniform thickness, so that the flow of the intake port 46 is increased. A non-linear characteristic is given to the change amount of the road cross-sectional area.

  When the flow rate of the air flowing into the separation chamber 53 from the air inlet 46 is zero, the air speed adjusting unit 47A has a minimum opening (that is, fully closed) to minimize the flow path cross-sectional area of the air inlet 46. It is not always necessary to close the intake port 46 (channel cross-sectional area = 0).

  The wind speed adjusting unit 47A configured as described above increases the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 increases. Then, the wind speed of the swirl flow F is reduced as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Therefore, even if the air volume of the air flowing into the dust collecting container 39 is large, the first separation unit 35A suppresses noise caused by the swirling flow F while suppressing an increase in separation performance.

  On the other hand, the wind speed adjusting unit 47A reduces the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 decreases. Then, the wind speed of the swirling flow F is improved as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Therefore, the first separation unit 35A can enhance the separation performance when the air volume of the air flowing into the dust collecting container 39 is small. Note that the noise at this time is small in the first place because the air volume of the air flowing into the dust collecting container 39 is small.

  In addition, the wind speed adjusting unit 47A has a combination of the high-rigidity portion 86c and the low-rigidity portion 86d to change the flow path cross-sectional area of the intake port 46 with respect to the amount of air flowing into the dust collecting container 39 from the intake port 46. Can be adjusted arbitrarily.

  Note that the elastic member 86A has a high rigidity portion 86c and a low rigidity as long as it gives a non-linear characteristic to the change in the cross-sectional area of the air inlet 46 with respect to the air volume flowing into the dust collecting container 39 from the air inlet 46. In addition to the combination with the portion 86d, it may be a combination in which the plate thickness changes continuously, a rib in which the height changes continuously, or a combination of different materials having different elastic moduli.

  9 and 10 are cross-sectional views showing the dust separation device according to the embodiment of the present invention.

  FIG. 9 shows a state in which the wind speed adjusting unit 47B is fully closed, and FIG. 10 shows a state in which the wind speed adjusting unit 47B is fully opened.

  As shown in FIGS. 5 and 6, the first separation unit 35B of the dust separation device 8B according to the present embodiment includes a dust collection container 39, an intake port 46, a first separation unit exhaust port 55, and an intake port 46. A wind speed adjusting unit 47B that changes the wind speed of the air flowing into the dust collecting container 39 from the inside.

  The wind speed adjusting unit 47 </ b> B changes the flow path cross-sectional area of the intake port 46 to increase or decrease the wind speed of the air flowing into the separation chamber 53. The wind speed adjusting unit 47B is provided at a connection portion between the air inlet 46 and the dust collecting container 39.

  Further, the wind speed adjusting unit 47B maintains the position of the outermost edge of the swirling flow F and changes the position of the inner peripheral edge of the swirling flow F to change the flow path cross-sectional area of the intake port 46. The position of the outermost edge of the swirling flow F depends on the connection location A between the side wall portion 46 a and the inner peripheral surface 39 a of the dust collecting container 39. That is, the wind speed adjusting unit 47B changes the position of the inner peripheral edge of the swirling flow F while keeping the connection point A as the outermost edge of the swirling flow F. In other words, the wind speed adjusting unit 47B brings the inner peripheral edge of the swirling flow F closer to the center line of the dust collecting container 39 as the opening degree increases and the cross-sectional area of the intake port 46 increases.

  Further, the wind speed adjusting unit 47B increases the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 from the intake port 46 increases. Specifically, the wind speed adjusting unit 47B opens and closes the connecting portion between the intake port 46 and the dust collecting container 39 to change the flow passage cross-sectional area of the intake port 46, and the dust collection container from the intake port 46. And an elastic member 86 </ b> B that interlocks the flow path cross-sectional area of the air inlet 46 with the air volume of the air flowing into the air inlet 39.

  The valve body 87 is swingably supported by a hinge mechanism 88 disposed on the side of the connection portion B between the side wall portion 46 b and the inner peripheral surface 39 a of the dust collecting container 39. Further, the valve body 87 includes a free end 87 b disposed on the side of the connection portion A between the side wall portion 46 a and the inner peripheral surface 39 a of the dust collecting container 39.

  The elastic member 86B is a torsion spring. The elastic member 86 </ b> B is provided in the hinge mechanism 88 of the valve body 87 and generates a force in the direction of closing the valve body 87. The spring characteristic of the elastic member 86B may be linear or non-linear.

  When the flow rate of the air flowing into the separation chamber 53 from the intake port 46 increases, the wind speed adjusting unit 47B opens the valve body 87 toward the separation chamber 53 with the hinge mechanism 88 as a fulcrum, and the flow passage cross-sectional area of the intake port 46 is increased. Enlarge.

  When the flow rate of the air flowing into the separation chamber 53 from the air inlet 46 is zero, the air speed adjusting unit 47B minimizes the opening (ie, fully closed) and minimizes the cross-sectional area of the air inlet 46. It is not always necessary to close the intake port 46 (channel cross-sectional area = 0).

  The wind speed adjusting unit 47B configured as described above increases the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 increases. Then, the wind speed of the swirl flow F is reduced as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Therefore, the first separation unit 35 suppresses noise caused by the swirling flow F while suppressing an increase in separation performance even if the air volume of the air flowing into the dust collecting container 39 is large.

  On the other hand, the wind speed adjusting unit 47B reduces the flow path cross-sectional area of the intake port 46 when the air volume of the air flowing into the dust collecting container 39 is reduced. Then, the wind speed of the swirling flow F is improved as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Accordingly, the first separation unit 35 can improve the separation performance when the air volume of the air flowing into the dust collecting container 39 is small. Note that the noise at this time is small in the first place because the air volume of the air flowing into the dust collecting container 39 is small.

  In addition, the wind speed adjusting unit 47B has a valve body 87 that is harder than natural rubber such as synthetic resin or synthetic rubber, and the cross-sectional area of the air inlet 46 can be changed by a strong material. hard.

  Further, the wind speed adjusting unit 47B makes the change characteristic of the flow path cross-sectional area of the intake port 46 with respect to the air volume flowing from the intake port 46 into the dust collecting container 39 by making the spring characteristic of the elastic member 86B non-linear. Can be adjusted.

  11 and 12 are cross-sectional views showing the dust separator according to the embodiment of the present invention.

  FIG. 11 shows a state in which the wind speed adjusting unit 47C is fully closed, and FIG. 12 shows a state in which the wind speed adjusting unit 47C is fully opened.

  As shown in FIGS. 11 and 12, the first separation unit 35C of the dust separation device 8C according to the present embodiment includes a dust collection container 39, an intake port 46, a first separation unit exhaust port 55, and an intake port 46. A wind speed adjusting unit 47C that changes the wind speed of the air flowing into the dust collecting container 39 from the inside.

  The wind speed adjusting unit 47 </ b> C changes the flow path cross-sectional area of the intake port 46 to increase or decrease the wind speed of the air flowing into the separation chamber 53. The wind speed adjusting unit 47C is provided at a connection portion between the air inlet 46 and the dust collecting container 39.

  Further, the wind speed adjusting unit 47C maintains the position of the outermost edge of the swirling flow F and changes the position of the inner peripheral edge of the swirling flow F to change the flow path cross-sectional area of the intake port 46. The position of the outermost edge of the swirling flow F depends on the connection location A between the side wall portion 46 a and the inner peripheral surface 39 a of the dust collecting container 39. That is, the wind speed adjusting unit 47C changes the position of the inner peripheral edge of the swirling flow F while keeping the connection portion A as the outermost edge of the swirling flow F. In other words, the wind speed adjusting unit 47 </ b> C brings the inner peripheral edge of the swirling flow F closer to the center line of the dust collecting container 39 as the opening degree increases and the cross-sectional area of the intake port 46 increases.

  Further, the wind speed adjusting unit 47C increases the flow path cross-sectional area of the air intake 46 when the air volume of the air flowing into the dust collecting container 39 from the air intake 46 increases. Specifically, the air speed adjusting unit 47C is configured to detect the air volume of the air flowing into the dust collecting container 39 from the air inlet 46, and the flow path of the air inlet 46 with respect to the detection result of the detector 91a. And a valve mechanism 92 that interlocks the cross-sectional area.

  The air volume detection unit 91 includes an operation mode (strong operation mode, medium operation mode, weak operation mode) of the electric blower 7, a combination of an operation mode of the electric blower 7 and a supply current to the electric blower 7, and an operation of the electric blower 7. The air volume of the air flowing into the dust collecting container 39 from the intake port 46 is indirectly detected by a combination of the mode and the pressure in the intake port 46. The air volume detection unit 91 may be a sensor that directly detects the air volume in the air inlet 46.

  The valve mechanism 92 includes: a valve body 93 that opens and closes a connection portion between the intake port 46 and the dust collecting container 39 to change a flow passage cross-sectional area of the intake port 46; and a valve drive mechanism 95 that opens and closes the valve body 93. Prepare.

  The valve body 93 slides on the inner peripheral surface 39 a of the dust collecting container 39 to change the flow path cross-sectional area of the intake port 46.

  The valve drive mechanism 95 is a drive source such as an electric motor that drives the valve body 93.

  When the flow rate of the air flowing into the separation chamber 53 from the air inlet 46 is zero, the air speed adjusting unit 47C minimizes the opening (ie, fully closed) and minimizes the flow path cross-sectional area of the air inlet 46. It is not always necessary to close the intake port 46 (channel cross-sectional area = 0).

  The wind speed adjusting unit 47 </ b> C configured as described above increases the flow path cross-sectional area of the air inlet 46 when the air volume of the air flowing into the dust collecting container 39 increases. Then, the wind speed of the swirl flow F is reduced as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Therefore, the first separation unit 35 suppresses noise caused by the swirling flow F while suppressing an increase in separation performance even if the air volume of the air flowing into the dust collecting container 39 is large.

  On the other hand, when the air volume of the air flowing into the dust collecting container 39 is reduced, the wind speed adjusting unit 47C reduces the flow path cross-sectional area of the intake port 46. Then, the wind speed of the swirling flow F is improved as compared with the case where the flow path cross-sectional area of the intake port 46 is not changed (constant). Accordingly, the first separation unit 35 can improve the separation performance when the air volume of the air flowing into the dust collecting container 39 is small. Note that the noise at this time is small in the first place because the air volume of the air flowing into the dust collecting container 39 is small.

  In addition, the wind speed adjusting unit 47C can adjust the dust separation performance and noise by opening and closing the valve body 93 in an appropriate relationship with the flow rate of air flowing into the separation chamber 53 from the air inlet 46.

  The vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, 8 </ b> C according to the present embodiment change the wind speed of the air flowing into the dust collecting container 39 from the air inlet 46, 47 </ b> A, 47 </ b> B, 47 </ b> C. , The flow passage cross-sectional area of the intake port 46 is changed according to the air volume of the air flowing into the dust collecting container 39, and the wind speed of the swirling flow F is controlled. Thereby, the vacuum cleaner 1 and the dust separators 8, 8A, 8B, and 8C according to the present embodiment have a wider air flow range (air flowing into the dust collecting container 39) than the conventional cyclone dust separator. The high air separation performance in the separation chamber 53 is balanced with the noise level.

  In addition, the vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, and 8 </ b> C according to the present embodiment change the flow passage cross-sectional area of the air inlet 46 and flow into the dust collecting container 39 from the air inlet 46. In order to change the wind speed, no complicated electrical control is required, and it can be easily configured.

  Furthermore, the vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, and 8 </ b> C according to the present embodiment are provided by the wind speed adjusting units 47, 47 </ b> A, 47 </ b> B, and 47 </ b> C provided at the connection portion between the air inlet 46 and the dust collecting container 39. Since the swirl flow F in the separation chamber 53 is directly changed, it is possible to easily design a balanced state between the high separation performance and the noise level in the separation chamber 53.

  Furthermore, the vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, and 8 </ b> C according to the present embodiment change the wind speed of the swirling flow F while maintaining the position of the outermost edge of the swirling flow F. When the air volume of the air flowing into the dust collecting container 39 decreases, it is easy to improve the separation performance by increasing the wind speed.

  Further, the vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, and 8 </ b> C according to the present embodiment change the wind speed of the swirl flow F while maintaining the position of the outermost edge of the swirl flow F, so Since the elastic members 86, 86A, 86B for interlocking the flow passage cross-sectional area of the intake port 46 with the air volume of the air flowing into the dust container 39 are provided, complicated electrical control is not required and the structure can be easily configured. .

  Furthermore, since the vacuum cleaner 1 and the dust separation device 8C according to the present embodiment include the wind speed adjustment unit 47C, the intake port 46 is more finely defined with respect to the amount of air flowing into the dust collecting container 39 from the intake port 46. Thus, the equilibrium state between the separation performance in the separation chamber 53 and the noise level can be set.

  Furthermore, the vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, 8 </ b> C according to the present embodiment include the inner cylinder 42, and restrict the opening degree of the wind speed adjusting units 47, 47 </ b> A, 47 </ b> B with the inner cylinder 42. Therefore, the air adhering to the surface of the inner cylinder 42 at the maximum opening degree of the wind speed adjusting portions 47, 47A, 47B is removed to remove the dust adhering to the mesh filter 57, thereby eliminating clogging.

  Therefore, according to the vacuum cleaner 1 and the dust separators 8, 8 </ b> A, 8 </ b> B, and 8 </ b> C according to the present embodiment, the noise caused by the swirling flow F while suppressing the separation performance when the air volume flowing into the dust collecting container 39 is large. When the air volume of the air flowing into the dust collecting container 39 is small, the separation performance can be improved.

  The vacuum cleaner 1 according to the present embodiment is not limited to a canister type, but may be an upright type, a stick type, or a handy type.

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

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 2 Vacuum cleaner main body 3 Pipe part 5 Main body case 6 Wheel 7 Electric blower 8, 8A, 8B, 8C Dust separator 9 Main body control part 11 Power cord 12 Main body connection port 14 Plug plug 19 Connection pipe 21 Dust collection Hose 22 Hand control pipe 23 Grip part 24 Operation part 24a Stop switch 24b Start switch 25 Extension pipe 26 Suction port body 28 Suction port 29 Rotating cleaning body 31 Electric motor 35, 35A, 35B, 35C First separation part 36 Second separation part 37 Exhaust pipe 38 Cover 39 Dust collecting container 39a Inner peripheral surface 39b Outer peripheral surface 41 Side wall 42 Inner cylinder 42a Outer peripheral surface 43 Dust capture cup 45 Handle 46 Air inlet 46a, 46b Side wall 47, 47A, 47B, 47C Wind speed adjusting unit 48 Large diameter Portion 49 small diameter portion 51 protrusion 52 groove 53 separation chamber 55 first separation portion exhaust port 56 second opening 57 mesh filter 58 third Mouth 59 Dust collection part 60 Mesh filter 62 Opening 63 Avoidance area 65 Guide pipe 66 Cyclone part 67 Dust trap Umbrella 68 Second separation part exhaust port 69 Frustum-shaped inner surface 70 Opening 71 Top opening 72 Opening 73, 75 Surface 76 Fine dust collection Dust chamber 77 Base member 78 Tubular body member 79 Partition member 81 Dust capture rib 82 Recess 83 Common partition member 85 Cover member 86, 86A Elastic member 86a Fixed end 86b Free end 86c High rigidity portion 86d Low rigidity portion 87 Valve body 87b Free end 88 Hinge mechanism 91 Air volume detection unit 91a Detection unit 92 Valve mechanism 93 Valve body 95 Valve drive mechanism

Claims (9)

A cylindrical tube,
An air inlet that allows air to flow in a direction in which a swirling flow is generated in the cylindrical body;
An exhaust port that is arranged concentrically with respect to the cylindrical body and allows air to flow out from a central portion of the swirling flow;
A vacuum cleaner comprising: a wind speed adjusting unit that changes a wind speed of air flowing into the cylindrical body from the intake port. The vacuum cleaner according to claim 1, wherein the wind speed adjusting unit changes a flow passage cross-sectional area of the intake port. The electric vacuum cleaner according to claim 1, wherein the wind speed adjusting unit is provided at a connection portion between the intake port and the cylindrical body. The vacuum cleaner according to any one of claims 1 to 3, wherein the wind speed adjusting unit maintains a position of an outermost edge of the swirling flow. The vacuum cleaner according to any one of claims 1 to 4, wherein the wind speed adjusting unit increases a flow passage cross-sectional area of the intake port when an air volume of air flowing into the cylinder from the intake port increases. The vacuum cleaner according to claim 5, wherein the wind speed adjusting unit includes an elastic member that interlocks a flow path cross-sectional area of the intake port with an air volume flowing into the cylinder from the intake port. The wind speed adjustment unit includes: an air volume detection unit that detects an air volume of air flowing into the cylindrical body from the intake port; and a valve mechanism that interlocks a flow path cross-sectional area of the intake port with a detection result of the detection unit. A vacuum cleaner according to claim 5. An inner surface that is concentrically arranged in the cylinder and fluidly connected to the exhaust port has an outer peripheral surface on which air flowing into the cylinder from the intake port blows when the flow path cross-sectional area of the intake port is maximum. The vacuum cleaner of any one of Claim 1 to 7 provided with a cylinder. A cylindrical tube,
An air inlet that allows air to flow in a direction in which a swirling flow is generated in the cylindrical body;
An exhaust port arranged concentrically with respect to the cylinder to allow air to flow out from a central portion of the swirling flow;
And a wind speed adjusting unit that changes a wind speed of air flowing into the cylindrical body from the air inlet.

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