JP2017000558A - Dust separation device and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust separation device capable of largely securing a volumetric capacity and an inner area of a second dust collection part and preventing dust from overflowing when depositing of collected dust and a vacuum cleaner.SOLUTION: A dust separation device 7 includes: a first centrifugal separation part 35 for separating centrifugally coarse dust from the air containing dust; a cylindrical first dust collection part 36 provided adjacent to one side in the axial direction of the first centrifugal separation part 35 for accumulating the coarse dust separated by the first centrifugal separation part 35; a second centrifugal separation part 37 provided adjacent to the other side in the axial direction of the first centrifugal separation part 35 for separating centrifugally fine dust from the air containing dust which passes through the first centrifugal separation part 35; and a second dust collection part 38 which surrounds the first centrifugal separation part 35 practically in the whole length and whose outer diameter is greater than that of the first centrifugal separation part 35 for accumulating the fine dust separated by the second centrifugal separation part 37.SELECTED DRAWING: Figure 4

Description

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

  2. Description of the Related Art Conventionally, an electric vacuum cleaner including a cyclone type dust separating device that generates a swirling flow in a cylindrical dust collecting container and centrifuges dust from air is known.

JP 2006-346669 A

  A conventional dust separation apparatus includes a first centrifugal separation unit that centrifuges coarse dust, a cylindrical first dust collection unit that accumulates coarse dust separated by the first centrifugal separation unit, and a first centrifugal separation unit. A second centrifuge for centrifuging finer dust from the air containing dust passing therethrough, and an annular second dust collector for accumulating the fine dust separated by the second centrifuge.

  By the way, the conventional dust separator includes a plurality of second centrifugal separators arranged in an annular shape so as to surround the first centrifugal separator. In other words, the first centrifugal separator and the second centrifugal separator overlap in the axial direction.

  Moreover, the conventional dust separation apparatus is equipped with the cup-shaped integral container as an outer shell of a 1st dust collection part and a 2nd dust collection part. The first dust collection unit uses the lower half of the cup-shaped container as a dust collection chamber. On the other hand, the second dust collecting part is an annular space, and the upper half of the cup-shaped container is used as the outer wall, and the wall defining the outer periphery of the first centrifugal separation part is shared and used as the inner wall. .

  The lower half of the cup-shaped container defining the first dust collecting part and the upper half of the cup-shaped container defining the outer periphery of the second dust collecting part are connected with the same diameter, and the second The end of the inner wall that defines the inner periphery of the dust collecting part (that is, the wall that defines the outer periphery of the first separation part) extends in a bowl shape and is in contact with the inner surface of the cup-shaped container.

  Therefore, in the conventional dust separator, since the first centrifugal separator and the second centrifugal separator overlap, the second dust collecting part is arranged so as to surround the first centrifugal separator. In spite of this, the volume of the second dust collecting part cannot be secured large. In particular, the fine dust accumulated in the second dust collection part is a fine powdery dust, and thus tends to adhere to the wall surface. However, the first centrifuge part and the second centrifuge part overlap. For this reason, it is difficult to secure a large inner area to which the dust is adhered, even though the second dust collecting portion is disposed so as to surround the first centrifugal separation portion.

  In the conventional dust separator, the lower half of the cup-shaped container that defines the first dust collecting part and the upper half of the cup-shaped container that defines the outer periphery of the second dust collecting part are connected with the same diameter. Therefore, when the container is separated and the dust is discarded, the dust adhering to the inner surface of the outer wall of the second dust collecting part is removed by the scissors at the lower end of the inner wall of the second dust collecting part. It will also overflow from the opening end of.

  Therefore, the present invention can ensure a large volume and inner area of the second dust collecting portion, and can prevent the dust from overflowing when the accumulated dust is discarded. , And propose a vacuum cleaner.

  In order to solve the above problems, a dust separation device according to an embodiment of the present invention includes a first centrifugal separation unit that centrifuges coarse dust from air containing dust, and an axial direction of the first centrifugal separation unit. A cylindrical first dust collecting unit that is adjacent and accumulates the coarse dust separated by the first centrifugal separation unit, and is adjacent to the other side in the axial direction of the first centrifugal separation unit, A second centrifuge for centrifuging fine dust from air containing dust passing through the centrifuge, and surrounding the first centrifuge over substantially the entire length thereof, and the first centrifuge And a second dust collecting part that accumulates the fine dust separated by the second centrifugal separator and having a larger outer diameter.

  In addition, a vacuum cleaner according to an embodiment of the present invention includes a vacuum cleaner body, the dust separation device detachably provided on the vacuum cleaner body, and a fluid contained in the dust separation device housed in the vacuum cleaner body. And an electric blower connected to the.

The perspective view of the vacuum cleaner which concerns on embodiment of this invention. The perspective view of the dust separator of the vacuum cleaner concerning the embodiment of the present invention. The perspective view of the dust separator of the vacuum cleaner concerning the embodiment of the present invention. Sectional drawing of the dust separation apparatus of the vacuum cleaner which concerns on embodiment of this invention. The perspective view of the dust separator which concerns on embodiment of this invention. The perspective view of the dust separator 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 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 electric vacuum cleaner 1 includes a vacuum cleaner body 2 that can travel on the surface to be cleaned, and a pipe portion 3 that is detachable from the cleaner body 2. The vacuum cleaner body 2 and the pipe portion 3 are fluidly connected.

  The vacuum cleaner main body 2 includes a main body case 5, a pair of wheels 6 provided on both left and right sides of the main body case 5, a detachable dust separating device 7 disposed in the front half of the main body case 5, An electric blower 8 housed in the latter half of the main body case 5, a main body control unit 9 that mainly controls the electric blower 8, and a power cord 11 that guides electric power to the electric blower 8 are provided.

  The vacuum cleaner main body 2 drives the electric blower 8 with the electric power supplied through the power cord 11, and causes the negative pressure generated by the drive of the electric blower 8 to act on the pipe portion 3. The vacuum cleaner 1 sucks air containing dust (hereinafter referred to as “dust-containing air”) from the surface to be cleaned through the pipe portion 3, separates the dust from the dust-containing air, and collects the separated dust. Then, clean air from which dust has accumulated and exhausted is exhausted.

  A main body connection port 12 is provided in the front portion of the main body case 5. The main body connection port 12 is a fluid inlet of the cleaner body 2. The main body connection port 12 fluidly connects the pipe portion 3 and the dust separation device 7.

  The wheel 6 is a large-diameter traveling wheel and supports the cleaner body 2.

  The dust separator 7 separates dust from the dust-containing air flowing into the cleaner body 2, collects and accumulates it, and sends clean air from which dust has been removed to the electric blower 8.

  The dust separator 7 has a substantially cylindrical appearance as a whole. The dust separation device 7 is leaning against the cleaner body 2 in a posture in which the bottom portion is shifted forward and the top portion is rearward with respect to the cleaner body 2 and slightly tilted backward. The dust separator 7 is detachably fixed to the cleaner body 2.

  The electric blower 8 sucks air from the dust separator 7 and generates a negative pressure (suction negative pressure).

  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 preset operation modes. The plurality of operation modes set in advance correspond to user operations input to the pipe section 3. Different input values (input values of the electric blower 8) are set in the respective operation modes. The main body control unit 9 selectively selects an arbitrary operation mode corresponding to the operation content from a plurality of preset operation modes in accordance with the user's operation input to the tube unit 3, and stores the operation unit. The operation of the electric blower 8 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). A plug 14 is provided at the free end of the power cord 11.

  The pipe part 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 is fluidly connected to the connection pipe 19 as a joint that is detachably connected to the cleaner body 2, the dust collection hose 21 that is fluidly connected to the connection pipe 19, and the dust collection hose 21. A hand operating tube 22, a gripping part 23 projecting from the hand operating tube 22, an operating part 24 provided on the gripping part 23, an extension tube 25 detachably connected to the hand operating tube 22, and an extension tube 25 And a suction port body 26 that is detachably connected.

  The connection pipe 19 is a joint that is detachable from the main body connection port 12, and is fluidly connected to the dust separator 7 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 collection hose 21 (here, the rear end) is fluidly connected to the connection pipe 19. The dust collection hose 21 is fluidly connected to the dust separation device 7 through the connection pipe 19.

  The hand operation tube 22 relays the dust collection hose 21 and the extension tube 25. One end portion (here, the rear end portion) of the hand operation tube 22 is fluidly connected to the other end portion (here, the front end portion) of the dust collecting hose 21. The hand operating tube 22 is fluidly connected to the dust separating device 7 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 protrudes from the hand operation tube 22 in an appropriate shape that can be easily gripped by the user's hand.

  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 8 and an activation switch 24 b associated with an operation start operation of the electric blower 8. The stop switch 24 a and the start switch 24 b are electrically connected to the main body control unit 9. The user of the vacuum cleaner 1 can alternatively select the operation mode of the electric blower 8 by operating the operation unit 24. The start switch 24 b also functions as an operation mode selection switch during operation of the electric blower 8. 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.

  An extension tube 25 having a telescopic structure in which a plurality of cylindrical bodies are overlapped is an elongate and substantially cylindrical tube that can be expanded and contracted. One end portion (here, the rear end portion) of the extension tube 25 is provided with a joint structure that is detachable from the other end portion (here, the front end portion) of the hand operation tube 22. The extension pipe 25 is fluidly connected to the dust separation device 7 through the hand operation pipe 22, the dust collection hose 21 and the connection pipe 19.

  The suction port body 26 can run or slide 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 is provided with a joint structure that is detachable from the other end portion (here, the front end portion) of the extension pipe 25. The suction port body 26 is fluidly connected to the dust separator 7 through the extension pipe 25, the hand operation pipe 22, the dust collection hose 21, and the connection pipe 19. That is, the suction port body 26, the extension tube 25, the hand operation tube 22, the dust collection hose 21, the connection tube 19, and the dust separation device 7 are suction air passages that lead from the electric blower 8 to the suction port 28.

  The electric vacuum cleaner 1 starts the electric blower 8 when accepting a user operation on the start switch 24b. For example, when the vacuum cleaner 1 receives an input to the start switch 24b while the electric blower 8 is stopped, the electric blower first operates the electric blower 8 in the strong operation mode and receives an input to the start switch 24b again. 8 is operated in the medium operation mode, and when an input is received by the start switch 24b three times, the electric blower 8 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 8 is small in the order of the strong operation mode, the medium operation mode, and the weak operation mode. The started electric blower 8 exhausts air from the dust separation device 7 to make the inside thereof a negative pressure (suction negative pressure).

The negative pressure of the dust separator 7 acts on the suction port 28 through the main body connection port 12, the connection tube 19, the dust collection hose 21, the hand operation tube 22, the extension tube 25, and the suction port body 26 in order. The vacuum cleaner 1 cleans the surface to be cleaned by sucking dust on the surface to be cleaned together with air by the negative pressure applied to the suction port 28. The dust separating device 7 separates and accumulates dust from the dust-containing air sucked into the electric vacuum cleaner 1, and sends clean air after separating the dust to the electric blower 8. The electric blower 8 exhausts the air sucked from the dust separator 7 to the outside of the cleaner body 2.
Next, the dust separator 7 will be described in detail.

  The dust separator 7 shown in FIG. 1 is attached to the cleaner body 2 in a backward tilting posture, but for the sake of simplicity, the dust separator 7 is shown upright below.

  2 and 3 are perspective views of the dust separator of the vacuum cleaner according to the embodiment of the present invention.

  FIG. 4 is a cross-sectional view of the dust separator of the vacuum cleaner according to the embodiment of the present invention.

  As shown in FIGS. 2 to 4, the dust separator 7 of the vacuum cleaner 1 according to this embodiment includes a first centrifugal separator 35 that centrifuges coarse dust from dust-containing air guided to the dust separator 7. A cylindrical first dust collecting unit 36 that is adjacent to one side in the axial direction of the first centrifugal separating unit 35 and accumulates coarse dust separated by the first centrifugal separating unit 35, and a first centrifugal separating unit 35. A second centrifuge 37 that centrifuges fine dust from air containing dust that passes through the first centrifuge 35 and the first centrifuge 35 are substantially full length. And a second dust collecting portion 38 that has a larger outer diameter than the first centrifugal separation portion 35 and accumulates fine dust separated by the second centrifugal separation portion 37. Yes.

  The dust separator 7 has a cylindrical shape. A first dust collecting unit 36 is disposed on one side (here, the bottom side) of the dust separating device 7, and a second centrifugal separating unit 37 is disposed on the other side (here, the top side) of the dust separating device 7. Yes. A first centrifugal separation unit 35 and a second dust collection unit 38 are disposed at the center of the dust separation device 7. That is, the first centrifugal separation unit 35 and the second dust collection unit 38 are disposed between the first dust collection unit 36 and the second centrifugal separation unit 37. The first centrifugal separator 35 and the second centrifugal separator 37 are adjacent to each other in the axial direction or the height direction of the dust separator 7 and are stacked. The first centrifugal separation unit 35 is surrounded by the second dust collection unit 38 at the periphery thereof.

  The outer shells of the first dust collecting unit 36 and the second dust collecting unit 38 are an integrated dust collecting container 41. That is, the first dust collecting part 36 and the second dust collecting part 38 share a dust collecting container 41 as an outer shell. The dust separator 7 has a cylindrical appearance by connecting the dust collecting container 41 to the second centrifugal separator 37.

  Further, the dust separation device 7 includes an exhaust air passage 42 that sends air passing through the second centrifugal separator 37 to the electric blower 8 and a top cover 43 that covers the exhaust air passage 42.

  Note that coarse dust is dust with a large mass such as fibrous dust such as lint and cotton dust or sand particles, and fine dust is dust with a small particle mass or powder and low mass.

  The first centrifugal separation unit 35 generates a swirling flow in the annular first centrifugal separation chamber 45 and separates dust from the dust-containing air by a centrifugal separation method (cyclone method). The first centrifugal separation unit 35 includes a cylindrical partition wall 46 that defines an outer periphery of an annular first centrifugal chamber 45 that separates coarse dust, and an inner periphery of the first centrifugal chamber 45 that is disposed inside the partition wall 46. A first filter part 47 having a cylindrical shape that defines the first filter part 47 and a dust trapping cup 48 connected to the first filter part 47. The first centrifugal separation unit 35 does not necessarily require the first filter unit 47 to the extent that coarse dust can be prevented from flowing downstream.

  One end of the partition wall 46 is fixed to the second centrifugal separator 37. The other end of the partition wall 46 is in contact with the inner surface of the dust collecting container 41. The partition wall 46 surrounds the entire first filter portion 47 and the upper half portion of the dust trapping cup 48 (the half portion on the side fixed to the first filter portion 47). The partition wall 46 has a plurality of portions having different diameters in the height direction. Specifically, the diameter is constant in the upper half of the partition wall 46 (the half part fixed to the second centrifugal separator 37), and the lower half of the partition wall 46 is in contact with the inner surface of the dust collecting container 41. In the half portion on the side where the dust is collected, the diameter increases toward the portion in contact with the dust collecting container 41.

  The first filter portion 47 is accommodated in the dust collecting container 41 and is disposed substantially concentrically. An annular space that separates the first filter portion 47 and the partition wall 46 is a first centrifugal separation chamber 45 that rotates dust-containing air flowing into the first centrifugal separation portion 35 to separate dust and air.

  The first filter portion 47 protrudes from the second centrifugal separation portion 37 and extends toward the bottom wall of the dust collecting container 41. The first filter unit 47 relays the first centrifuge chamber 45 and the second centrifuge unit 37 by fluidly connecting them. The first filter unit 47 includes a frame 51 having a plurality of bones 49 that are spaced apart from each other and arranged in a cylindrical shape, and a mesh filter 52 that surrounds the periphery of the frame 51 in a cylindrical shape. The second opening 53 between the bones 49 of the frame body 51 allows air to flow out from the first centrifugal separation chamber 45 to the second centrifugal separation portion 37.

  Naturally, the mesh filter 52 is used for the first centrifugal separation in a period in which the swirling flow in the first centrifugal separation chamber 45 is not sufficiently developed, such as immediately after the start of the electric blower 8 or a stop transition, and after the swirling flow has developed. Coarse dust is prevented from flowing from the portion 35 to the second centrifugal separation portion 37 side.

  The dust trapping cup 48 is provided at an end portion of the first filter portion 47 close to the bottom wall of the dust collecting container 41, that is, a protruding end or a lower end portion. The bottomed cylindrical dust capturing cup 48 has a bottom wall connected to the first filter portion 47 and a side wall that protrudes from the lower end of the partition wall 46 and extends toward the bottom wall of the dust collecting container 41. . That is, the dust capturing cup 48 is opened toward the bottom wall of the dust collecting container 41. The side wall of the dust catching cup 48 faces the inner peripheral surface of the partition wall 46 and the inner peripheral surface of the dust collecting container 41 with a gap. The dust trapping cup 48 has a diameter larger than that of the first filter portion 47 and has a third opening 55 on the bottom wall connected to the first filter portion 47.

  A space separating the dust capturing cup 48 and the dust collecting container 41 is a first dust collecting chamber 56 in which dust separated by the first centrifugal separator 35 is accumulated. The air in the first dust collection chamber 56 returns to the first centrifugal separation chamber 45 through the third opening 55.

  A mesh filter 57 is provided in the third opening 55. The mesh filter 57 may be coarse enough that coarse dust (fibrous such as lint and cotton dust) flowing into the first dust collecting chamber 56 does not return to the first centrifugal separation chamber 45.

  When the dust collecting container 41 is removed from the dust separating device 7, the first filter part 47, the dust catching cup 48, and the partition wall 46 come out of the dust collecting container 41 along with the second centrifugal separating part 37 (FIG. 2). 3 shows a state in which the first filter portion 47 and the dust capturing cup 48 are detached from the second centrifugal separation portion 37 and pulled out of the partition wall 46, it may be disassembled into the state of FIG. It does not have to be disassembled.

  The second centrifuge 37 separates fine dust from the dust-containing air that passes through the first centrifuge 35. The second centrifugal separator 37 includes a relay air passage 61 that guides air that has passed through the first centrifugal chamber 45, a second centrifugal chamber 62 that separates fine dust from the air flowing from the relay air passage 61, and fine dust And an exhaust air passage 42 for guiding the air flowing out from the second centrifugal separation chamber 62 to the electric blower 8 after being decomposed.

  The second centrifugal separator 37 is detachably connected to the dust collecting container 41 and closes the open end 63 of the dust collecting container 41. The second centrifuge 37 supports the first filter 47 and the dust capturing cup 48 on the center line C of the dust collecting container 41.

  A plurality of second centrifuge chambers 62 are annularly provided on the outermost peripheral portion of the second centrifuge 37. An annular relay air passage 61 is disposed inside the plurality of second centrifuge chambers 62 arranged in an annular shape. Further, an exhaust air passage 42 is disposed inside the annular relay air passage 61 and on the extended line of the center line C of the dust collecting container 41 or in the central portion of the cylindrical second centrifugal separator 37. . In other words, the second centrifugal separation unit 37 is a triple structure in which the second centrifugal separation chamber 62, the annular relay air passage 61, and the exhaust air passage 42 are arranged in order from the outer peripheral side.

  The relay air passage 61 guides air (dust-containing air) flowing in from the first filter portion 47 in a direction away from the dust collecting container 41 and guides it to the second centrifugal separation chamber 62.

  There are a plurality of second centrifuge chambers 62, which are arranged in a substantially annular shape surrounding the relay air passage 61. Each second centrifuge chamber 62 has a frustoconical wall 66 that creates a spiral flow. The frustoconical wall 66 is reduced in diameter as it approaches the first centrifugal separator 35. Each second centrifuge chamber 62 discharges the separated dust to the vicinity of the inner edge of the open end 63 of the dust collection container 41.

  The truncated cone-shaped wall 66 has a bottom portion at a portion farthest from the first centrifugal separation portion 35. The frustoconical wall 66 has an air outlet 67 in the center of the bottom. The air outlet 67 is connected to the exhaust air passage 42. The frustoconical wall 66 has an inlet 68 on the side of the bottom. The inlet 68 is connected to the relay air passage 61.

  The frustoconical wall 66 has a top at a portion closest to the first centrifugal separation portion 35. The frustoconical wall 66 has a dust outlet 69 at the top. The dust outlet 69 is connected to the dust collecting container 41.

  Air (dust-containing air) flows into the second centrifuge chamber 62 from the inlet 68. The air flowing into the second centrifuge chamber 62 from the inlet 68 generates a spiral spiral flow toward the dust outlet 69 along the inner peripheral surface of the frustoconical wall 66 and separates fine dust from the air. The separated fine dust is discharged from the dust outlet 69 at the top to the dust collecting container 41. The clean air from which the dust has been separated flows on the center line of the spiral spiral flow (center line of the truncated cone-shaped wall 66) and flows out from the air outlet 67 on the bottom wall to the exhaust air passage 42.

  A second dust collecting portion 38 is provided at the tip of the dust outlet 69 of the second centrifugal separation chamber 62. The second dust collecting portion 38 includes a dust collecting container 41 as an outer wall integral with the first dust collecting portion 36 and a partition wall 46 as an inner wall integral with the second centrifugal separation portion 37.

  The dust collecting container 41 is a part of the outer shell of the dust separator 7 and also serves as the outer shell of the first dust collecting portion 36 and the second dust collecting portion 38. The dust collecting container 41 includes a large diameter portion 71 disposed at an open end, an inclined portion 72 connected to the large diameter portion 71 and constricted to a small diameter, and a substantially uniform diameter dimension connected to the inclined portion 72. And a small-diameter portion 73 reaching the bottom wall.

  The connecting portion of the large diameter portion 71 and the small diameter portion 73, that is, the inclined portion 72 has an inclined surface that narrows from the large diameter portion 71 toward the small diameter portion 73 inside the dust collecting container 41.

  The large diameter portion 71 is narrowed from the opening end toward the inclined portion 72. The change in the diameter of the large-diameter portion 71 is more gradual than that of the inclined portion 72 and surrounds almost the entire first centrifugal separation portion 35. The diameter of the large diameter portion 71 is larger than the diameter of the partition wall 46. The entire partition 46 is housed inside the large diameter portion 71 and the inclined portion 72.

  The large diameter portion 71 and the inclined portion 72 are outer walls of the second dust collecting portion 38, and the small diameter portion 73 is an outer wall of the first dust collecting portion 36.

  The inclined portion 72 is in contact with the lower end portion of the partition wall 46 to partition the second dust collecting portion 38 and the first dust collecting portion 36.

  On the other hand, the partition wall 46 defines the outer periphery of the first centrifugal separator 35 and the inner periphery of the second dust collector 38. That is, the inside of the partition wall 46 is the first centrifugal separation chamber 45, and the outside of the partition wall 46 is the second dust collection chamber 75.

  The exhaust air passage 42 covers the bottom of the second centrifuge chamber 62 and goes from the outermost peripheral portion connected to the air outlet 67 toward the center of the second centrifuge 37 while reducing the diameter. It approaches the centrifugal separator 35 and enters the center of the relay air passage 61 on the center line C of the dust collecting container 41. The exhaust air passage 42 is bent in a direction intersecting with an extension line of the center line C of the dust collecting container 41 (a center line of the dust separation device 7) from a portion surrounded by the plurality of second centrifugal separation chambers 62, The exhaust port 76 is reached. The exhaust air passage 42 is a portion farthest from the first centrifugal separator 35 and includes a concave portion 77 that is recessed toward the first centrifugal separator 35 at the center of the top cover 43. The exhaust air passage 42 collects air flowing out from the air outlet 67 of the second centrifuge chamber 62 toward the center of the dust separator 7, and once flows into the first centrifuge 35 by the recess 77. Then, the flow direction is changed at a substantially right angle, and the air is exhausted from the exhaust port 76.

  The top cover 43 includes a top plate 81 that closes the top of the second centrifuge unit 37, and a swingable handle 82 provided on the top plate 81.

  Further, the top plate 81 is provided with a hinge mechanism 91 that supports the handle 82 so as to be swingable. The hinge mechanism 91 is provided on the outer peripheral portion of the top plate 81. The hinge mechanism 91 swings the handle 82 to increase the opening height of the gap 92 between the handle 82 and the top plate 81. That is, the hinge mechanism 91 makes it possible to set the opening height of the gap 92 in the normal state to be lower than the average finger thickness. In this case, the hinge mechanism 91 swings the handle 82 in accordance with the thickness of the finger that enters the gap 92 and enlarges the opening height of the gap 92.

  The handle 82 is provided on the top of the top cover 43 (that is, the top of the dust separator 7). The user can hold the dust separator 7 firmly by inserting a finger into the handle 82. The handle 82 cooperates with the recess 77 of the top plate 81 to partition a gap 92 that is opened so that fingers can be inserted and removed.

  Next, the air inlet 93 of the dust separator 7 according to this embodiment will be described.

  5 and 6 are perspective views of the dust separator according to the embodiment of the present invention.

  FIG. 5 shows a state where the dust collecting container 41 is removed. Further, FIG. 6 shows a state in which the first centrifugal separator 35 is cut.

  As shown in FIGS. 5 and 6 in addition to FIGS. 3 and 4, the dust separator 7 according to the present embodiment includes a suction passage 101 for introducing dust-containing air into the first centrifugal separator 35.

  The suction passage 101 is integral with the inner wall of the second centrifugal separator 37, that is, the partition wall 46, and passes through the outer wall of the second centrifugal separator 37, that is, the dust collecting container 41 to the first centrifugal separator 35. Lead. The suction passage 101 extends from the large diameter portion 71 of the dust collection container 41 to the partition wall 46 and crosses the second dust collection portion 38. The suction passage 101 causes the dust-containing air to flow in the direction along the inner peripheral surface of the partition wall 46 through the dust collection container 41 and the partition wall 46, thereby generating a swirling flow in the first centrifugal separation unit 35. Therefore, the suction passage 101 extends in a tangential direction from any part of the partition wall 46.

  Further, the suction passage 101 includes a flange portion 102 connected to the large diameter portion 71 of the dust collecting container 41. The flange portion 102 extends in a trapezoidal shape around the inlet of the suction passage 101, and is fitted into the trapezoidal container recess 103 of the large-diameter portion 71 of the dust collection container 41 when the dust collection container 41 is attached and detached. The airtightness of the two dust collecting portions 38 is maintained.

  When the dust collecting container 41 is removed from the dust separating device 7, the dust separating device 7 creates a gap between the inclined portion 72 of the dust collecting container 41 and the lower end portion of the partition wall 46, so that the second dust collecting portion 38 and the second dust collecting portion 38 are connected. Through the dust collecting part 36. At this time, a part of the fine dust accumulated in the second dust collecting portion 38 falls to the first dust collecting portion 36 and joins the coarse dust.

  By the way, the fine dust accumulated in the second dust collecting portion 38 is charged with static electricity, so that the inner wall surface of the second dust collecting portion 38, that is, the inner surface of the large diameter portion 71 and the inclined portion 72 of the dust collecting container 41 and the partition wall 46. May adhere to the outer surface of the. The dust separator 7 according to the present embodiment surrounds the first dust separator 35 over the entire length of the second dust collector 38, so that the second dust collector is larger than the conventional dust separator. 38 is provided, a large amount of dust can be adhered to the inner wall surface of the second dust collecting portion 38. This prevents fine dust from splashing when removing the dust collecting container 41 from the dust separator 7.

  Moreover, the vacuum cleaner 1 and the dust separator 7 according to the present embodiment make the large diameter portion 71 of the dust collection container 41 as the outer wall of the second dust collection portion 38 larger than the first dust collection portion 36, When the first centrifugal separation unit 35 including the partition wall 46 is taken out from the dust collecting container 41, the fine dust accumulated in the second dust collecting unit 38 is separated from the conventional dust separation by stepping the inclined part 72. As a device, it is prevented from overflowing from the dust collecting container 41.

  Therefore, according to the vacuum cleaner 1 and the dust separator 7 according to the present embodiment, it is possible to secure a large volume and inner area of the second dust collecting portion 38, and when the accumulated dust is discarded. Can prevent the dust from overflowing.

  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 Dust separator 8 Electric blower 9 Main body control part 11 Power supply cord 12 Main body connection port 14 Plug 19 Connection pipe 21 Dust collection hose 22 Hand operation pipe 23 Grasping part 24 Operation part 24a Stop switch 24b Start switch 25 Extension pipe 26 Suction port body 28 Suction port 29 Rotary cleaning body 31 Electric motor 35 First centrifugal separation unit 36 First dust collection unit 37 Second centrifugal separation unit 38 Second dust collection Part 41 Dust collection container 42 Exhaust air passage 43 Top cover 45 First centrifuge chamber 46 Partition 47 First filter part 48 Dust capture cup 49 Bone 51 Frame 52 Mesh filter 53 Second opening 55 Third opening 56 First dust collection Chamber 57 Mesh filter 61 Relay air passage 62 Second centrifugal separation chamber 63 Open end 66 Frustum-shaped wall 67 Air outlet 68 Inlet 69 Dust outlet 71 Large diameter portion 7 2 Inclined portion 73 Small-diameter portion 75 Second dust collecting chamber 76 Exhaust port 77 Concave portion 81 Top plate 82 Handle 91 Hinge mechanism 92 Clearance 93 Inlet port 101 Suction passage 102 Flange portion 103 Concave portion of container

Claims (4)

A first centrifuge for centrifuging coarse dust from air containing dust;
A cylindrical first dust collecting part that is adjacent to one side in the axial direction of the first centrifugal separator and accumulates the coarse dust separated by the first centrifugal separator,
A second centrifuge that centrifuges fine dust from the air containing dust that passes through the first centrifuge and is adjacent to the other side in the axial direction of the first centrifuge;
Accumulate the fine dust separated from the second centrifuge part by surrounding the first centrifuge part substantially over its entire length and having an outer diameter larger than that of the first centrifuge part. And a second dust collecting unit. The second dust collecting portion includes an outer wall integral with the first dust collecting portion, and an inner wall integral with the second centrifugal separation portion,
The outer wall of the second dust collecting unit and the first dust collecting unit are integrally separated from the inner wall of the first centrifugal separating unit, the second centrifugal separating unit, and the second dust collecting unit. The dust separator according to 1. 3. The intake passage according to claim 2, further comprising a suction passage that is integral with the inner wall of the second centrifuge unit and guides air containing the dust to the first centrifuge unit through the outer wall of the second centrifuge unit. Dust separator. The vacuum cleaner body,
The dust separation device according to any one of claims 1 to 3, wherein the dust separation device is detachably provided on the cleaner body.
An electric blower housed in the vacuum cleaner body and fluidly connected to the dust separator.

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