JP6491779B2 - Dust collector and vacuum cleaner - Google Patents

Description

  The present invention relates to a dust collector and a vacuum cleaner.

  2. Description of the Related Art A so-called cyclonic electric vacuum cleaner having a cyclone type dust collecting device that centrifugally separates dust by swirling sucked air in a dust collecting container is known. In general, a cyclone type dust collector is provided with a filter for further filtering the air after the dust is centrifuged. As a result, fine dust that has not been centrifuged is collected by the filter.

  In recent years, there have been proposed multi-cyclone vacuum cleaners that are provided with two stages of centrifugal separators for swirling air and that are designed so that the size of dust that is centrifuged in each centrifugal separator is different. Such a multi-cyclone type vacuum cleaner is disclosed in Patent Document 1, for example.

  In the dust collector in the electric vacuum cleaner of Patent Literature 1, coarse dust having a relatively large size in the air containing dust is centrifuged in the first centrifugal separator, and is not centrifuged in the first centrifugal separator. The fine dust is centrifuged in the second centrifugal separator.

JP 2013-236671 A (published November 28, 2013)

  However, in the dust collector described in Patent Document 1 described above, the exhaust from the exhaust cylinder portion of the second centrifugal separation unit arranged in the upper stage of the first centrifugal separation unit to the exhaust opening exhausted to the outside of the dust collector is performed. The air path first extends upward from the second centrifugal separator and is bent to the side of the second centrifugal separator in the middle. That is, since the air passage in the dust collector is bent in this way, the pressure loss in the air passage increases, and the suction power of the cleaner decreases.

  Moreover, in the dust collector described in Patent Document 1, the exhaust air passage communicates with the downstream side of the second centrifuge unit, and air flows from above the second centrifuge unit to the side of the second centrifuge unit. It is continuous so as to reduce the flow rate, and is bent backward. As described above, since there is a portion where the width is narrowed in the air passage, in the vacuum cleaner described in Patent Document 1, turning noise and wind noise increase. Furthermore, the structure of the exhaust air passage is complicated.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a dust collector and a vacuum cleaner that can suppress an increase in pressure loss in the air passage. is there.

In order to solve the above problems, a dust collector according to one aspect of the present invention has passed through a first centrifugal separation unit that separates first dust in dust-containing air, and the first centrifugal separation unit. A plurality of second centrifugal separators for separating second dust smaller than the first dust in the dust-containing air; a dust collecting container for collecting the first and second dust; And a dust collector provided with a discharge port for discharging the air from which the first and second dusts have been separated, the dust collecting device having an upper lid, A discharge air path from the outlet to the outlet is provided above the second centrifugal separator, a filter is provided above the outlet of the second centrifugal separator, and the second centrifugal separator is provided. Between the upper surface of the centrifuge and the filter, a gap is provided over almost the entire area. The discharged air is discharged through the filter from the bottom to the top.

  According to one aspect of the present invention, it is possible to provide a dust collector that can suppress an increase in pressure loss in an air passage.

It is a perspective view which shows the structure of the vacuum cleaner main body with which the vacuum cleaner which concerns on embodiment of this invention was equipped. It is sectional drawing which shows the structure of the cleaner body shown in FIG. It is a perspective view which shows the structure of the dust collector which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of the dust collector which concerns on embodiment of this invention. It is sectional drawing for demonstrating the flow of the air in the dust collector which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the dust collector which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of the dust collection part main body in the dust collector which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of the 2nd centrifuge unit in the dust collector which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of the filter unit in the dust collector which concerns on embodiment of this invention.

Embodiment 1
(Vacuum cleaner body)
Hereinafter, Embodiment 1 of the present invention will be described in detail.

  The vacuum cleaner according to the present embodiment includes a vacuum cleaner body, a suction port, a connection pipe, a connection hose, an operation handle, and the like. FIG. 1 is a perspective view showing a configuration of a vacuum cleaner body 1 provided in the electric vacuum cleaner according to the present embodiment. FIG. 2 is a cross-sectional view showing the configuration of the cleaner body 1.

  As shown in FIGS. 1 and 2, the cleaner body 1 includes a drive device 2 and a cyclone dust collector 100. The drive device 2 supports the dust collector 100 in a detachable manner in the front.

  Here, let the surface where the cleaner main body 1 is installed be a horizontal surface. A direction perpendicular to the horizontal plane is defined as a height direction. Moreover, let the opposite side to the drive device 2 in the dust collector 100 be a front side, and let the opposite side to this front side be a rear side.

  The drive device 2 includes a connecting portion 3, an external exhaust port 4 for discharging internal air to the outside, an electric blower 5, and a control device 6. A connection hose provided in the vacuum cleaner according to the present embodiment is connected to the connection unit 3. Further, the drive device 2 has an exhaust port 31 and an intake port 32. When the dust collector 100 is attached to the drive device 2, the exhaust port 31 is configured to communicate with the inlet 113 of the dust collector 100, and the intake port 32 communicates with the outlet 135 of the dust collector 100. Is configured to do.

The electric blower 5 includes a blower fan for performing intake air and a blower drive motor that rotationally drives the blower fan. The control device 6 has a control unit such as a CPU, a RAM, and a ROM, and comprehensively controls the electric vacuum cleaner. Specifically, in the control device 6, the CPU executes various processes according to a control program stored in the ROM.

  In the electric vacuum cleaner according to the present embodiment, the electric blower 5 built in the cleaner main body 1 is operated, whereby intake is performed from the suction port portion. As shown in FIG. 2, the air containing dust sucked from the suction port portion passes through the suction path Y indicated by the broken-line arrow from the connection portion 3 to the dust collecting device 100 from the exhaust port 31 of the driving device 2. be introduced. The air sucked in the dust collector 100 is sucked from the air inlet 32 of the drive device 2 in a state where the dust is centrifuged and the dust is removed. The air sucked from the intake port 32 is discharged to the outside from the external exhaust port 4 provided at the rear portion of the drive device 2 through the exhaust path Z indicated by the solid line arrow. The exhaust path Z passes through the control device 6. For this reason, the control device 6 is cooled by the air flowing through the exhaust path Z.

(Dust collector)
Hereinafter, the configuration of the dust collector 100 will be described in detail with reference to FIGS. FIG. 3 is a perspective view showing the configuration of the dust collector 100. FIG. 4 is an exploded perspective view showing the configuration of the dust collector 100. FIG. 5 is a cross-sectional view for explaining the flow of air in the dust collector 100. FIG. 6 is a cross-sectional view showing the configuration of the dust collector 100. 5 and 6, the cross-sectional direction of the dust collector 100 is different.

  First, as shown in FIG. 2, the dust collector 100 is mounted on the driving device 2 and constitutes the cleaner body 1, and the central axis C is about 20 ° with respect to the horizontal plane. It is arranged to incline to. By disposing the dust collector 100 at such an angle, the height and front-rear direction dimensions of the cleaner body 1 can be reduced, and a compact design of the cleaner body 1 becomes possible. For example, when the dust collector 100 is tilted so that the central axis C exceeds 30 ° with respect to the horizontal plane, the height dimension can be suppressed, but the front-back dimension increases. On the contrary, when the dust collector 100 is not inclined or the central axis C is inclined at an angle of 10 ° or less with respect to the horizontal plane, the height dimension becomes large. Therefore, the cleaner main body 1 can be designed in a compact manner by inclining the central axis C of the dust collector 100 around 20 ° with respect to the horizontal plane.

  The dust collector 100 includes a dust collector main body 110, a second centrifuge unit 120, and a filter unit 130. The dust collection unit main body 110 includes a dust collection cup 111 having an upper opening. The second centrifuge unit 120 is detachably attached to the upper opening of the dust collection cup 111. The filter unit 130 is attached to the upper part of the second centrifuge unit 120.

(Dust collector body 110)
As shown in FIGS. 5 and 6, the dust collection unit main body 110 includes a dust collection cup 111 in which an inflow port 113 for introducing air containing dust is formed. The dust collection cup 111 is open at the top and is divided into a first dust collection chamber 111A and a second dust collection chamber 111B formed around the first dust collection chamber 111A. The second dust collection chamber 111B is configured such that its inner wall includes the outer peripheral surface 111C of the first dust collection chamber 111A. Moreover, the lower part (bottom) of the dust collection cup 111 is also opened. A bottom cover 114 is provided at the bottom of the dust collection cup 111 so as to be openable and closable. Since the second dust collection chamber 111B is provided on the outer periphery of the first dust collection chamber 111A, the dust collection cup 111 can be easily washed with water, and maintenance is facilitated.

FIG. 7 is an exploded perspective view showing the configuration of the dust collection body 110. With reference to FIG. 7, the configuration of the bottom cover 114 will be described in detail. The bottom lid 114 is rotatably attached to the dust collection cup 111 via a shaft portion (not shown) supported by the shaft support portion 112 so that the bottom lid 114 can be opened and closed with respect to the dust collection cup 111. An opening 114 a is formed in the center portion of the bottom lid 114.

  Further, the bottom cover 114 is provided with a rotation transmission mechanism 50 (first rotation transmission mechanism). The rotation transmission mechanism 50 is rotatably provided in the opening 114a of the bottom cover 114. As shown in FIGS. 5 and 6, the opening 114a has a cylindrical shape protruding upward. A receiving portion 114b that functions as a bearing of the rotation transmission mechanism 50 (first rotation transmission mechanism) is integrally provided on the inner surface of the opening 114a.

  The receiving part 114b has a cylindrical shape as shown in FIGS. A support portion 51 is rotatably provided below the receiving portion 114b. The support portion 51 has an opening that substantially matches the inner diameter of the cylinder of the receiving portion 114b, and is formed with a league-shaped recess that fits into the receiving portion 114b.

  A transmission gear 52 for transmitting rotation is provided below the support portion 51 via a coil spring 53. An annular lower seal material 54 is provided to seal between the lower surface of the bottom lid 114 and the transmission gear 52. The lower seal material 54 is fitted and fixed between the opening 114 a and the receiving portion 114 b of the bottom lid 114, and the lower surface is in close contact with the transmission gear 52. Further, the upper portion of the coil spring 53 is in contact with a flange portion 51 a formed on the outer periphery of the support portion 51. Further, the lower portion of the coil spring 53 is fitted into an annular hole 52a formed in an annular shape in the transmission gear 52, and is in contact with the bottom surface of the annular hole 52a. As described above, the coil spring 53 is interposed between the support portion 51 and the transmission gear 52. The transmission gear 52 is urged downward by the action of the urging force of the coil spring 53.

  On the other hand, on the upper side of the support portion 51, that is, on the upper side of the receiving portion 114 b, a connecting portion 55 is provided in the opening portion 114 a via the upper seal material 56. The connecting portion 55 is for transmitting the rotational force that is the driving force of the transmission gear 52 to the rotation transmission mechanism 60 that rotates the compression portion 123 of the second centrifugal separation unit 120. The connecting portion 55 is integrally provided with a ring-shaped flange portion 55a at a substantially central portion in the vertical direction (height direction). The upper seal material 56 is fitted and fixed to the flange portion 55a. The outer peripheral surface of the upper seal material 56 comes into contact with the opening 114 a and seals the dust collection space inside the dust collection cup 111. Further, the upper surface of the upper seal material 56 is provided in an exposed state in the dust collection cup 111, and a lower end of a compression portion constituting a second rotation transmission mechanism described later comes into contact with the member. Has the function of sealing.

  The connecting portion 55 includes a connecting body 55b that protrudes upward from the flange portion 55a and a shaft portion 55c that protrudes downward from the flange portion 55a. The connection body 55b is provided to connect to the rotation transmission mechanism 60 that rotates the compression unit 123 of the second centrifuge unit 120. The shaft portion 55c passes through the opening of the receiving portion 114b of the opening portion 114a. A portion of the shaft portion 55c corresponding to the opening of the receiving portion 114b has a cylindrical shape, and a lower portion thereof has a quadrangular prism shape. And the four protrusion part protruded from each surface of the said square pole shape is provided. An opening is formed in the support portion 51 so as to match the lower shape of the shaft portion 55c. Further, the transmission gear 52 is formed with a coupling portion 52b that engages with the lower shape of the shaft portion 55c. The coupling portion 52b has an opening that matches the lower shape of the shaft portion 55c. Therefore, the transmission gear 52 is screw-fixed by fastening the central portion of the connecting portion 55 with the fixing screw 57A and the nut 57B with the coil spring 53 interposed therebetween. And it connects rotatably via the receiving part 114b of the opening part 114a of the bottom cover 114. As shown in FIG.

  As described above, the transmission gear 52 is provided on the bottom surface of the dust collector 100, that is, the bottom cover 114 of the dust collection cup 111. The inside of the dust collection cup 111 is sealed with an upper sealing material 56 and a lower 54.

  An annular sealing material 58 is attached to the lower surface of the collar portion of the dust collection cup 111. The annular sealing material 58 maintains the hermetic sealing between the openable / closable bottom lid 114 and the dust collecting cup 111.

  Corresponding to the transmission gear 52, a transmission drive gear constituting a drive unit serving as a drive source is provided on the drive device 2 side. The transmission drive gear is configured to mesh with the transmission gear 52.

(Second centrifuge unit 120)
The configuration of the second centrifuge unit 120 will be described in detail with reference to FIGS. FIG. 8 is an exploded perspective view showing the configuration of the second centrifuge unit 120.

  As shown in FIGS. 5, 6, and 8, the second centrifuge unit 120 includes an upper lid body 121 that closes the dust collection cup 111 from above, an inner cylinder portion 122, a compression portion 123, and a rotation transmission mechanism 60. (Second rotation transmission mechanism).

  An opening 121 a is formed at the center of the upper surface of the upper lid body 121. And the upper cover main body 121 has the cylindrical part 121b in the upper part. A connecting projection 121c is formed at the lowermost portion of the upper lid body 121, and a tapered portion 121d is connected to the connecting projection 121c.

  The upper lid body 121 is detachably provided to the dust collection cup 111. For this reason, the dust collector 100 can be easily disassembled, and maintenance becomes easy.

  Eight second centrifuges 80 are arranged side by side along the inner surface constituting the cylindrical part 121b of the upper lid body 121. In each of the second centrifuges 80, an inflow port 81 is formed so as to communicate with the space in the cylindrical part 121b. The second centrifugal separation unit 80 includes a swivel cylinder portion 82 in which air flowing in from the inflow port 81 swirls. The swivel cylinder portion 82 has a tapered structure configured to become narrower downward. In the center of the upper surface of the swivel cylinder portion 82, an outlet 83a through which air flows out is formed. An exhaust cylinder 83 is provided so as to extend downward from the outlet 83a. The air separated by the second centrifugal separator 80 passes through the exhaust pipe 83 and is discharged upward from the outlet 83a provided in the upper part.

  In addition, a flat surface that is flush with the upper surface of the second centrifuge 80 is formed on the upper portion of the upper lid body 121. For this reason, the upper part of the upper lid body 121 can be easily cleaned, and maintenance of the dust collector 100 is facilitated.

  Each second centrifuge 80 has a structure protruding vertically downward from the upper lid body 121. In a state where the second centrifuge unit 120 is attached to the dust collection unit main body 110, the lower part of each second centrifuge unit 80 is accommodated in the second dust collection chamber 111 </ b> B of the dust collection cup 111. In other words, the second dust collection chamber 111B of the dust collection cup 111 is provided with a space for accommodating the swivel cylinder portion 82 in the lower portion of each second centrifugal separator 80. Accordingly, the height of the dust collector 100 can be reduced by the amount that the second centrifugal separator 80 is accommodated in the second dust collection chamber 111B.

  In addition, a taper wall surface adapted to the taper structure of the swivel cylinder portion 82 of the second centrifugal separator 80 is formed in the space in which the second centrifugal separators 80 are accommodated in the second dust collection chamber 111B. Thereby, each second centrifuge 80 can be stably held in the second dust collecting chamber 111B.

  Further, all the openings at the lower end of the second centrifugal separator 80 are arranged so as to communicate with the second dust collecting chamber 111B. And in the state where the 2nd centrifuge unit 120 was attached to dust collection part main part 110, the lower end part of the 2nd centrifuge part 80 comes to be positioned by the wall surface which constitutes the 2nd dust collection room 111B. Yes.

  The inner cylinder portion 122 is connected to the lower portion of the upper lid main body 121 and is configured to vent the air after the cyclone separation by the first centrifugal separation portion described later to the upper portion of the upper lid main body 121. The compressing unit 123 is for compressing the dust collected in the dust collecting cup 111. The rotation transmission mechanism 60 is for transmitting the rotational force of the rotation transmission mechanism 50 to the compression unit 123.

  The inner cylinder part 122 has an upper opening edge 122a that expands upward, and a body part 122c having a plurality of slits 122b for allowing air after centrifugation to pass through. Note that a mesh-shaped intake-side filter is wound around the outer periphery of the body portion 122c. The upper opening edge 122a of the inner cylinder part 122 is joined to the taper part 121d of the upper lid body 121 with a screw. A sealing material (not shown) is fixed to the upper edge of the upper opening edge 122a of the inner cylinder portion 122 in advance. The space between the upper edge of the upper opening edge 122a and the lower surface of the tapered portion 121d of the upper lid body 121 is sealed with this sealing material. A seal member 124 is provided at the lower end of the body portion 122 c of the inner cylinder portion 122.

  The compression part 123 has a large-diameter cylindrical part 123a at the top. A small diameter cylindrical portion 123b having a diameter smaller than that of the large diameter cylindrical portion 123a is provided below the large diameter cylindrical portion 123a. The large-diameter cylindrical portion 123a communicates with the inner cylindrical portion 122, and has a function of classifying the upper portion of the dust collection cup 111 as a centrifugal separation portion (cyclone portion) and the lower portion as a dust collection portion that collects dust after separation. Prepare. For this reason, the diameter of the large diameter cylindrical portion 123 a is larger than the cylindrical diameter of the inner cylindrical portion 122.

  The compression portion 123 has a spiral blade 123c doubled on the outer peripheral surface thereof over the large diameter cylindrical portion 123a and the small diameter cylindrical portion 123b. Each spiral blade 123c has a function of compressing dust and dust in the dust collection cup 111 by rotating. A plurality of small protrusions 123d (see FIG. 5) are formed on the lower surface of the spiral blade 123c. These protrusions 123d have a function of contacting and pushing down the dust and dust when the spiral blades 123c rotate, and this function can increase the compressibility of the dust and dust.

  Further, the lower end of the small diameter cylindrical portion 123b of the compression portion 123 is in close contact with the upper sealing material 56 provided on the bottom lid 114 as shown in FIG. The sealing by the upper sealing material 56 can prevent the dust in the dust collection cup 111 and the dust in the compression portion 123 from being mixed.

  Next, the rotation transmission mechanism 60 will be described. As shown in FIGS. 5, 6, and 8, the rotation transmission mechanism 60 includes an engaging portion 61, a first rotating cylinder 62, and a second rotating cylinder 63.

  As shown in FIG. 5, the engaging portion 61 is integrally formed inside the small diameter cylindrical portion 123 b of the compression portion 123, and is engaged and connected to the connecting portion 55 of the rotation transmission mechanism 50. . The engagement / connection between the connecting portion 55 and the engaging portion 61 is not particularly limited, and a conventionally known connecting mechanism can be used to connect the drive. When the engaging part 61 of the compression part 123 is connected to the connection part 55, the compression part 123 is rotated by the rotation of the rotation transmission mechanism 50, and the collected dust is compressed as necessary.

  Here, the structure in which the compression part 123 is rotatably provided is demonstrated below. As shown in FIG. 5, the compression portion 123 is provided with a connecting piece 123 e having a flat shape. The connecting piece 123e is configured such that the large-diameter cylindrical portion 123a and the small-diameter cylindrical portion 123b are vertically connected. The first rotating cylinder 62 and the second rotating cylinder 63 are supported and fixed to the connecting piece 123e. The first rotating cylinder 62 and the second rotating cylinder 63 are housed in the inner cylinder portion 122. The second rotating cylinder 63 is fixed with screws 64 (see FIG. 5).

  The cylindrical inner diameter of the second rotating cylinder 63 is substantially the same as the inner cylinder inner diameter of the small diameter cylindrical portion 123b. The second rotating cylinder 63 is formed so that the inner diameter of the cylinder is substantially the same as the inner diameter of the first rotating cylinder 62. The first rotating cylinder 62 is provided in the inner cylinder portion 122 so as to be rotatable.

  A support portion 62 a that protrudes outward is integrally formed at the upper end of the first rotating cylinder 62. The support portion 62 a is held (supported) on the upper opening edge 122 a of the inner cylinder portion 122. As shown in FIG. 6, the support portion 62 a is supported by being sandwiched between the lower end of the connection projecting portion 121 c of the upper lid body 121 and the upper opening edge 124 a. The first rotating cylinder 62 is rotatably supported by the inner cylinder portion 122.

  The first rotating cylinder 62 and the second rotating cylinder 63 have substantially the same structure as the inner cylinder part 122, and a slit is formed in the cylindrical body part. Thereby, air can be ventilated between the inside and the outside of the first rotating cylinder 62 and the second rotating cylinder 63.

  The first rotating cylinder 62 is integrally provided with four connecting pieces 62b protruding upward. The connecting piece 62b is formed inward of the support portion 62a and inward of the connecting protrusion 121c of the upper lid body 121.

  Corresponding to the connecting piece 62b, the upper lid body 121 at the upper part is provided with a locking piece so as to protrude downward. This locking piece is provided so as to be locked to the connecting piece 62b of the first rotating cylinder 62, and locks at least two connecting pieces 62b.

(Filter unit 130)
A configuration of the filter unit 130 will be described in detail with reference to FIGS. FIG. 9 is an exploded perspective view showing the configuration of the filter unit 130.

  The filter unit 130 includes a filter case 131, an exhaust side filter 132, a sealing material 133, and a filter cover 134. The filter case 131 supports the lower part of the exhaust side filter 132. The exhaust side filter 132 is detachably accommodated in the filter case 131. The filter cover 134 is detachably attached to the filter case 131 and is configured to cover the upper part of the exhaust-side filter 132. A sealing material 133 is attached to the outer periphery of the exhaust side filter 132. The sealing material 133 is used to bring the exhaust filter 132 and the filter cover 134 into close contact with each other.

  The exhaust-side filter 132 includes a filter main body 132a made of a folded HEPA filter, an annular frame 132b for holding the filter main body 132a, a central boss portion 132c penetrating in a direction perpendicular to the filter main body 132a, It has the coupling | bond piece 132d formed by couple | bonding the boss | hub part 132c and a frame. In addition, the sealing material 133 is fitted and fixed to the outer peripheral surface of the frame 132b.

  The filter case 131 includes an opening edge 131a whose upper side is opened, a step portion 131b, a body portion 131c, and a connecting cylinder portion 131d. The filter cover 134 is supported by the upper end part of the opening edge 131a. The step portion 131 b is in close contact with the sealing material 133 fitted into the frame body 132 b in the exhaust side filter 132 and supports the exhaust side filter 132. The trunk 131c is connected to the opening edge 131a via the step 131b, and has an opening diameter smaller than that of the opening edge 131a. Further, the connecting cylinder part 131d is formed in the lower part of the body part 131c. A thread groove 131e (see FIG. 6) is formed on the inner wall of the connecting cylinder portion 131d. On the other hand, a screw thread 121e is formed on the upper portion of the upper lid body. The filter unit 130 is detachably attached to the upper portion of the second centrifuge unit 120 by the thread 121e and the thread groove 131e being engaged and fastened.

(Operation of vacuum cleaner)
The operation of the vacuum cleaner according to this embodiment will be described below. First, when the electric vacuum cleaner is operated, the control device 6 operates the electric blower 5 and sucks air from the suction port. The air sucked from the suction port portion flows into the cleaner body 1 through the connection pipe and the connection hose and through the connection portion 3 connected to the connection hose. The dust-containing air that has flowed into the cleaner body 1 flows into the dust collector 100 via the suction path Y indicated by the arrow in FIG. The dust-containing air that has flowed into the inlet 113 of the dust collector 100 is discharged from the outlet 135 via the separation path X indicated by the arrows in FIGS.

  In the dust collector 100, the upper part acts as the first centrifugal separator 70 (cyclonic part) with the large-diameter cylindrical part 123 a in the upper part of the compressing part 123 in the dust collecting cup 111 as a boundary. That is, in the dust collector 100, the first centrifugal separation unit 70 is a swirling air path constituted by the inner surface of the first dust collection chamber 111 </ b> A in the dust collection cup 111, the outer peripheral surface of the inner cylinder portion 122, and the like. The inflow port 113 opens in the tangential direction of the swirling air passage formed by the first centrifugal separator 70. Therefore, the dust-containing air that has flowed in via the inflow port 113 swirls the swirling air passage formed by the first centrifugal separator 70, so that particularly coarse dust (first dust) in the dust-containing air is reduced. Then, it is centrifuged, falls along the inner surface of the dust collection cup 111, and is collected on the bottom lid 114.

  The air from which the coarse dust has been separated passes through the inner cylindrical portion 122 and reaches the cylindrical portion 121b of the upper lid body 121. The air in the cylindrical part 121b flows into each second centrifuge part 80.

  In the second centrifugal separator 80, the inflow port 81 into which the dust-containing air flows is opened in the tangential direction of the swirl flow path of the air formed between the swirl tube portion 82 and the exhaust tube 83. Therefore, the dust-containing air that has flowed in from the inflow port 81 swirls along the inner peripheral surface of the swivel cylinder portion 82. Here, the swirl direction of air in the second centrifuge 80 is opposite to the swirl direction of air in the first centrifuge 70. The air swirl axis in the second centrifuge 80 is substantially parallel to the air swirl axis in the first centrifuge 70.

  The second centrifugal separator 80 is configured such that the turning radius of the dust-containing air is smaller than the turning radius in the first centrifugal separator 70 and the turning speed is higher than the turning speed in the first centrifugal separator 70. Designed. Thereby, with respect to the dust-containing air that has passed through the first centrifugal separator 70, dust that is smaller than the coarse dust separated by the first centrifugal separator 70, that is, fine dust, can be separated. Therefore, the fine dust (second dust) in the dust-containing air is centrifuged by the swirling of the air in the second centrifugal separator 80, falls along the inner peripheral surface of the swivel cylinder 82, and the second 2 enters the dust collecting chamber 111B and is finally stored on the bottom lid 114 in the second dust collecting chamber 111B.

  The air from which the fine dust (second dust) has been separated passes through the exhaust pipe 83 provided at the center of each second centrifugal separator 80 and is discharged from the outlet 83a.

  The air discharged from the outlet 83a passes through the exhaust filter 132 in the vertical direction and is discharged from the dust collector 100 through the outlet 135. In the dust collector 100, a discharge air path from the outlet 83 a to the discharge port 135 is provided above the second centrifugal separator 80.

  Thus, since it is the structure which isolate | separates the 2nd centrifuge part unit 120 and the filter unit 120, and complexity of a structure can also be prevented, a maintenance becomes easy.

  In addition, since all the discharge air paths from the outlet 83a to the outlet 135 are provided above the second centrifugal separator 80, the discharge path becomes a simple path from the bottom to the top, and the dust collector 100 The increase of the turning sound and wind noise generated in the vehicle can be suppressed.

  The air discharged from the dust collector 100 passes through the intake port 32 and is discharged to the outside from the external exhaust port 4 via the exhaust path Z shown in FIG.

  During such operation, the transmission gear 52 provided on the bottom surface of the dust collector 100 is rotated by a drive motor (not shown). As a result, the connecting portion 55 is rotated by the rotation transmission mechanism 50. And the engaging part 61 connected with the connection part 55 rotates. The engaging portion 61 is provided integrally with the compressing portion 123. Therefore, the compression portion 123 is rotated by the rotation of the engaging portion 61. As the compression unit 123 rotates, the spiral blade 123c rotates in a direction in which the collected dust is compressed. The spiral blade 123c may be continuously rotated during a cleaning period, or may be operated by sequentially repeating rotation and stop at regular intervals. Moreover, you may rotate when the quantity of dust increases.

  In addition, the rotation direction of the spiral blade 123c can be appropriately set according to the structure of the spiral blade 123c, and may be any direction as long as the spiral blade 123c of the compression unit 123 can be compressed.

  When the cleaning is completed, the user stops the operation of the electric blower 5. At this time, the compression unit 123 is rotated in the direction opposite to the compression rotation direction by the spiral blade 123c. Therefore, the dust is not compressed after the operation of the electric blower 5 is stopped. The dust collected in the first dust collecting chamber 111A of the dust collecting cup 111 by the compressing operation by the compressing unit 123 is sufficiently compressed during cleaning. For this reason, even if the compression unit 123 rotates in the direction opposite to the compression rotation direction after the operation of the electric blower 5 is stopped, the compressed dust is not affected at all.

  Further, when a certain amount of dust is accumulated in the dust collection cup 111 of the dust collector 100, the user removes the dust collector 100 from the cleaner body 1.

  Then, after carrying the dust collector 100 to a disposal position such as a trash box, the user rotates the bottom lid 114 by its own weight, for example, by externally operating a trash disposal button (not shown) or the like. As a result, the coarse dust (first dust) and the fine dust (second dust) accumulated on the bottom cover 114 are discarded together at the disposal position.

Thus, in the dust collector 100, the dust collection cup 111 is divided into the first dust collection chamber 111A that collects coarse dust and the second dust collection chamber 111B that collects fine dust. A part of the wall surface constituting the second dust collection chamber 111B is the outer peripheral surface 111C of the first dust collection chamber 111A. Therefore, in the dust collector 100, the coarse dust separated by the first centrifugal separator 70 is accommodated in the first dust collecting chamber 111A, while the fine dust separated by the second centrifugal separator 80 is the second dust. It is accommodated in the second dust collection chamber 111B, which is a space independent of the first dust collection chamber 111A. And dust collection cup 1
By opening 11, coarse dust and fine dust are discarded together. Therefore, in the dust collector 100, the fine dust centrifuged by the second centrifugal separator 80 when the collected dust is discarded is collected in the bottom lid 114 together with the coarse dust centrifuged by the first centrifugal separator 70. No need for structure. Therefore, according to the configuration of the dust collector 100, the fine dust separated by the second centrifugal separator 80 and the coarse dust separated by the first centrifugal separator 70 can be discarded together with a simple structure. .

  In the dust collector 100, the position of the bottom of the first dust collection chamber 111A and the position of the bottom of the second dust collection chamber 111B are substantially the same position. In this way, the second dust collection chamber 111B that accumulates fine dust separated by the second centrifugal separator 80 can have a sufficient height equivalent to the first dust collection chamber 111A. Therefore, it becomes difficult for fine dust to flow out to the outside of the second dust collection chamber 111B. As a result, the dust collector 100 can sufficiently ensure the separation performance between coarse dust and fine dust.

[Embodiment 2]
Another embodiment 2 of the present invention will be described below.

  In the dust collector provided in the vacuum cleaner according to the present embodiment, when the exhaust air path indicates the air flow of the air above the outlet of the second centrifugal separator with a line, A line connecting the outlet of the second centrifugal separator and the outlet of the dust collector at the shortest distance exists. Here, the dust collector according to the present embodiment will be described using the configuration of FIG.

  In FIG. 5, the air discharged from the outlet 83 a passes through the exhaust filter 132 in the vertical direction and is discharged from the dust collector 100 through the discharge port 135. In the dust collector 100, a discharge air path from the outlet 83 a to the discharge port 135 is provided above the second centrifugal separator 80. Further, the discharge flow path is formed by the inner wall of the filter case 131 and the filter cover 134, and does not bend downward or to the side of the second centrifugal separator 80. Here, when the airflow generated in the discharge air path from the outlet 83a to the outlet 135 is indicated by a line, there is a line connecting at least the outlet 83a and the outlet 135 in the shortest distance among these lines. Is ideal. In this way, when there is an air flow line with the shortest distance, a main air passage from the lower side to the upper side is formed in the air passage in the dust collector 100 and is not bent midway. Therefore, an increase in pressure loss in the air path of the dust collector 100 can be suppressed.

  When the exhaust air passage has the configuration of the first embodiment, the air flow exhausted from the exhaust-side filter 132 is bent only at one location near the exhaust port 135. Ideally, this bend is eliminated. In order to eliminate this bent portion, in the present embodiment, for example, the position of the exhaust port 135 from the exhaust side filter 132 is disposed above the exhaust side filter 132. As a result, bent portions of the airflow of the air exhausted from the exhaust side filter 132 can be eliminated. And by carrying out like this, since there is no structural narrow path in an exhaust wind path, the increase in the turning sound and wind noise which generate | occur | produce in the dust collector 100 can be suppressed. In addition, since there is no bent portion, it is possible to prevent the structure of the exhaust air passage from becoming complicated.

[Embodiment 3]
Still another embodiment 3 of the present invention will be described below.

  In the vacuum cleaner according to the first embodiment, the filter unit 130 is attached to the dust collector 100 side. However, the filter unit 130 is not limited to the configuration of the first embodiment.

  That is, in the vacuum cleaner according to the present embodiment, the filter unit 130 is attached to the drive device 2 side. With this configuration, the dust collector 100 includes the dust collector main body 110 and the second centrifuge unit 120, and the weight of the device can be reduced.

[Summary]
The dust collecting apparatus 100 according to the first aspect of the present invention is provided with a first centrifuge 70 that separates first dust in dust-containing air and an upper stage than the first centrifuge 70. A second centrifugal separator 80 that separates second dust smaller than the first dust in the dust-containing air that has passed through the separator 70, and a dust collecting container that collects the first and second dust A dust collecting device provided with a discharge port 135 for discharging the air from which the first and second dusts have been separated, and the second centrifugal separator 80. The exhaust air passage from the air outlet 83 a to the exhaust port 135 is provided above the second centrifugal separator 80.

  According to said structure, the main air path which goes upwards from the downward direction is formed in the air path in the dust collector 100, and it does not bend in the middle. Therefore, according to said structure, the increase in the pressure loss in the air path of the dust collector 100 can be suppressed.

  A dust collector 100 according to aspect 2 of the present invention includes the upper lid (upper lid main body 121) that closes the dust collecting container (dust collecting cup 111) in the above aspect 1, and is provided above the upper lid (upper lid main body 121). May have a configuration in which a flat surface that is flush with the upper surface of the second centrifuge 80 is formed.

  According to said structure, the upper part of an upper cover (upper cover main body 121) becomes easy to clean, and the maintenance of the dust collector 100 becomes easy.

  The dust collecting apparatus 100 according to aspect 3 of the present invention includes the upper lid (upper lid body 121) that closes the dust collecting container (dust collection cup 111) in the above-described aspect 1 or 2, and the upper lid (upper lid body 121) includes: The structure provided so that attachment or detachment with respect to the said dust collection container (dust collection cup 111) may be sufficient.

  According to said structure, for this reason, the dust collector 100 can be disassembled easily and a maintenance becomes easy.

  The dust collecting apparatus 100 according to aspect 4 of the present invention includes the filter (exhaust side filter 132) disposed above the second centrifuge 80 in the above aspects 1 to 3, and the filter (exhaust side filter 132). ) May be provided in the middle of the exhaust air passage.

  According to said structure, since the said filter (exhaust side filter 132) is provided in the middle of the said exhaust air path, the dust collector which the dust collection efficiency improved can be implement | achieved.

  The dust collector 100 according to aspect 5 of the present invention is the above-described aspect 1 to 4 in which the second centrifugal separator 80 is provided, and an upper lid (upper lid main body) that closes the dust collection container (dust collection cup 111) from above. 121), and the lower lid of the second centrifugal separator 80 constitutes the second dust collecting chamber 111B in a state where the upper lid (upper lid body 121) is attached to the dust collecting container (dust collecting cup 111). It is preferable to be positioned by the wall surface.

  According to said structure, since the position of the 2nd centrifugation part 80 with respect to the 2nd dust collection chamber 111B is hold | maintained, the 2nd centrifugation part 80 can be hold | maintained more stably in the 2nd dust collection chamber 111B. Can do.

  The vacuum cleaner which concerns on aspect 6 of this invention is the structure provided with the dust collector of the said aspects 1-5.

  According to said structure, the vacuum cleaner which suppressed the increase in the pressure loss in the air path of the dust collector 100 is realizable.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  In the electric vacuum cleaner, the example of the cyclone dust collecting device as the dust collecting device has been described, but not only the cyclone type dust collecting device but also dust in the air is separated and separated. The dust can be collected, and the separated air can be used in general vacuum cleaners that remove fine dust through a filter.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Drive apparatus 3 Connection part 4 External exhaust port 5 Electric blower 6 Control apparatus 50 Rotation transmission mechanism 60 Rotation transmission mechanism 70 First centrifuge part 80 Second centrifuge part 81 Inlet 82 Rotating cylinder part 83 Exhaust pipe 83a Outlet 100 Dust collector 110 Dust collector body 111 Dust collector cup (dust collector)
111A First dust collection chamber 111B Second dust collection chamber 111C Outer peripheral surface 113 Inlet 114 Bottom lid 120 Second centrifuge unit 121 Upper lid body (upper lid)
122 Inner cylinder part 123 Compression part 130 Filter unit 131 Filter case 132 Exhaust side filter (filter)
134 Filter cover 135 Discharge port C Center axis X Separation path Y Suction path Z Exhaust path

Claims (6)

An inlet for introducing air containing dust,
A first centrifuge for separating the first dust in the dust-containing air;
A plurality of second centrifugal separators for separating second dust smaller than the first dust in the dust-containing air that has passed through the first centrifugal separator;
A dust collecting container for collecting the first and second dusts;
An upper lid of the dust collecting container,
A dust collector provided with a discharge port for discharging the air from which the first and second dusts are separated;
The exhaust air passage from the air outlet to the exhaust port in the second centrifugal separator is provided above the second centrifugal separator,
A filter is provided above the outlet of the second centrifuge,
Between the upper surface of the second centrifugal separation unit and the filter, a gap is provided almost entirely,
The dust collector is characterized in that the air discharged from the outflow port passes through the filter from the lower side to the upper side and is discharged . 2. The dust collecting apparatus according to claim 1, wherein the filter includes a circular filter body and a frame body that holds the filter body, and the periphery of the frame body is supported. 3. The dust collector according to claim 1, wherein the inflow port opens in a tangential direction of a swirling air passage formed by the first centrifugal separator. The dust collector according to claim 3, wherein the inlet and the outlet are provided on the same side of the dust collector. The dust collector according to any one of claims 1 to 4, wherein the discharge port is arranged above the filter. An electric vacuum cleaner comprising the dust collecting device according to any one of claims 1 to 5 .