JP6416636B2 - Dust collector and vacuum cleaner - Google Patents

Description

Embodiments of the present invention relates to an electric vacuum cleaner equipped with dust collector and this has the multistage separation unit centrifuging the dust.

  Conventionally, as a dust collector provided in a vacuum cleaner body incorporating an electric blower, a first separation unit that centrifuges relatively large coarse dust, and a relatively small fine dust that could not be separated by the first separation unit ( And a second separation unit that centrifuges fine dust).

  A plurality of the second separators are usually provided in parallel, and the dust-containing air is sucked into the cylindrical second separator main body along the tangential direction, and the dust-containing air is sucked into the second separator main body. And the dust is centrifuged to discharge the air from the upper part of the second separator main body. At this time, in order to reduce the size of the dust collector, it is possible to bend the air passage downward and set the position of the exhaust port downward, but when the air passage is bent like this Since there is a risk of pressure loss, especially when applying to vacuum cleaners where it is not easy to improve the suction power, such as rechargeable vacuum cleaners, the suction work rate is reduced due to pressure loss. It is desirable to prevent it.

JP 2014-33740 A

The problem to be solved by the present invention is to suppress the pressure loss caused by the exhaust from the second separation part and secure the suction work rate while using the first separation part and the second separation part for centrifugal separation of dust. It is providing a dust collector and a vacuum cleaner provided with the dust collector .

The dust collector of the embodiment has an intake port for sucking in dust-containing air, and includes a first separation unit that centrifuges dust from the dust-containing air, and further dust from the dust-containing air that has been centrifuged by the first separation unit. And a second separation unit that centrifuges. The second separation unit includes a plurality of second separation unit main bodies and a cover. The plurality of second separator main bodies are formed in a cylindrical shape whose inner peripheral surface gradually decreases in diameter from one end side to the other end side, and swirls air along the inner peripheral surface. The cover covers the one end side of the plurality of second separation unit main bodies and has a plurality of discharge openings through which air is discharged from each second separation unit. The dust collector includes a filter body and a lid. The filter body is disposed to face the discharge opening. The lid body has an exhaust port that communicates with the discharge opening through the filter body on the opposite side of the discharge opening with respect to the filter body . The air inlet is located at a position opposite to the filter body with respect to the plurality of second separator main bodies .

It is sectional drawing which shows the II equivalent position of FIG. 5 of the dust collector of the vacuum cleaner of one Embodiment. It is explanatory sectional drawing which shows typically a part of dust collector same as the above. It is the perspective view which removed a part of dust collection device same as the above. It is a perspective view which shows the state which further removed a part from the state shown in FIG. 3 of a dust collector same as the above. It is a perspective view which shows a dust collector same as the above. It is a perspective view which shows the main-body part of a vacuum cleaner same as the above. It is a perspective view which shows a vacuum cleaner same as the above. It is a graph which shows an example of the relationship between the air volume and suction work rate of a vacuum cleaner same as the above.

  The configuration of one embodiment will be described below with reference to the drawings.

  In FIG. 7, reference numeral 11 denotes a vacuum cleaner, and this vacuum cleaner 11 constitutes a vacuum cleaner together with a support device (charging base) (not shown) that supports the vacuum cleaner 11 in a stored state that is not used for cleaning. It is.

  And this electric vacuum cleaner 11 is equipped with a vacuum cleaner body 15 and a so-called stick comprising an extension pipe 16 directly connected to this vacuum cleaner body 15 and an air passage body 18 comprising a floor brush 17 as a suction port body. A type of vacuum cleaner. For the vacuum cleaner 11, hereinafter, in the front-rear direction, the up-down direction, the left-right direction, etc., the floor brush 17 or the tip side of the extension pipe 16 to which the floor brush 17 is connected is the surface to be cleaned (floor surface). The use state (for example, the state shown in FIG. 7) that is placed on and cleaned is used as a reference. That is, the arrow U and arrow D directions shown in FIG. 7 are defined as the up-down direction, the arrow FR direction and the arrow RR direction as the front-rear direction, and the arrow L direction and the arrow R direction as the left-right direction.

  The vacuum cleaner main body 15 includes a main body 21 and a dust collector 22 that can be attached to and detached from the main body 21.

  The main body 21 shown in FIGS. 6 and 7 has an outer case constituted by a main body case 25 formed of, for example, a synthetic resin. The main body 21 includes a connecting portion 26 and a charging connecting portion 27 located at one end, a protruding portion 28 located at the other end, and a space between the connecting portion 26 and the charging connecting portion 27 and the protruding portion 28. A continuous longitudinal main body 29, a holding part 30 that protrudes from the main body 29 and holds the dust collector 22, and a grip for connecting the protrusion 28 and the holding part 30 to hold the cleaner body 15 The fitting portion 32 into which the dust collecting device 22 is fitted is recessed between the main body 29 and the holding portion 30. The main body 21 includes an electric blower 34, a control unit 35 that controls driving of the electric blower 34, and a secondary battery 36 that serves as a power source for the electric blower 34 and the control unit 35. Is housed and configured.

  The connection part 26 includes a main body connection port 41 to which the extension pipe 16 is connected at the front end part. In addition, the connection portion 26 is provided with an extension tube clamp portion 43 that holds the connected extension tube 16, and a fulcrum portion 44 that serves as a fulcrum when the dust collector 22 is attached to the main body portion 21. Is provided.

  The extension tube clamp portion 43 can be of any known configuration, but is exposed to be operable at the upper portion of the connection portion.

  In this embodiment, the fulcrum part 44 is recessed in the upper part of the connection part 26, and is located behind the extension pipe clamp part 43, that is, on the opposite side to the main body connection port 41. The fulcrum portion 44 is formed such that the inner surface is curved in an arc shape when viewed from the side.

  The charging connection portion 27 is for charging the secondary battery 36 and is a portion mechanically and electrically connected to the support device side. Inside the charging connection portion 27, a charging terminal (not shown) is arranged.

  The main body 29 is formed in a linear longitudinal shape, and is inclined so that the front part is on the lower side and the rear part is on the upper side in use. Inside the main body 29, an electric blower 34, a control means 35 and the like are accommodated. In addition, the main body 29 communicates with an intake communication port 47 as a first opening communicating with the dust collecting device 22 and a suction side of the electric blower 34 at an upper portion facing the fitting portion 32, that is, the dust collecting device 22. Exhaust communication ports 48 as second openings are opened side by side, spaced apart in the longitudinal direction of the main body 29.

  The holding portion 30 protrudes along the direction intersecting (orthogonal) with the longitudinal direction of the main body 29 from the upper portion of the main body 29, specifically, from the front portion where the main body 29 and the protruding portion 28 are continuous. . Therefore, the upper portion of the main body portion 21 surrounds the fitting portion 32 by the holding portion 30 and the main body 29 and has an L shape. The holding portion 30 is provided with a guide portion 51 serving as a guide when the dust collector 22 is attached to the main body portion 21 at a position facing the fitting portion 32.

  The guide part 51 is formed in a linear rib shape along the holding part 30, that is, along a direction intersecting (orthogonal) with the longitudinal direction of the main body 29 (main body part 21). In the present embodiment, a pair of guide portions 51 are provided at positions facing the fitting portion 32 of the holding portion 30 so as to be separated from each other on the left and right. Further, in the guide portions 51, the end portion on the base end side of the holding portion 30 is a dust collector locking portion 51a for locking and fixing the dust collector 22. Therefore, these guide parts 51 have a function of a locking and fixing part that locks and fixes the dust collector 22 to the main body part 21.

  The grip portion 31 is also called a hand operation portion, and has a circular arc shape that extends from the rear end portion of the projecting portion 28 (main body portion 21 (vacuum cleaner main body 15)) to the front end portion (front end portion) of the holding portion 30. Is formed. In addition, a setting button 53 for setting the operation of the electric blower 34 and the like in the control means 35 is disposed on the grip portion 31.

  The electric blower 34 is also called a fan motor, and generates negative pressure by driving to suck dust-containing air into the dust collector 22 through the air passage body 18, and dust is collected in the dust collector 22. The separated air is sucked and cooled, and then exhausted.

  The control means 35 includes a drive control unit that operates the electric blower 34 and the like according to the setting of the user by the setting button 53, and a charging circuit unit such as a constant current circuit that receives power from the support device side and charges the secondary battery 36. Are provided. In the present embodiment, as the control means 35, for example, a circuit board provided with a microcomputer is used.

  The secondary battery 36 is a battery pack in which a plurality of batteries are connected in series or in parallel. Instead of the secondary battery 36, a cord reel device that takes power from an external power source using a power cord may be used as the power source unit.

  The dust collector 22 shown in FIGS. 1 to 5 and FIG. 7 is a separation main body 55 that separates dust from dust-containing air, and a dust container that stores dust separated by the separation main body 55. It is formed in a substantially cylindrical shape including a cup portion 56. Further, the dust collector 22 is sucked from the intake port 58 and the intake port 58 for sucking in dust-containing air by driving the electric blower 34 at a position facing the main body unit 21 in a state where the dust collector 22 is mounted. Exhaust ports 59 for discharging the air from which the dust is separated by the separation main body 55 to the outside of the dust collector 22 are opened. The dust collector 22 is configured such that the intake port 58 and the exhaust port 59 are opposed to the upper side of the main body portion 21 (main body 29), that is, the main body portion 21 is fitted with the intake port 58 and the exhaust port 59 side as the lower side. The main body portion 21 is fitted to the joint portion 32. The positional relationship of each part of the dust collector 22 will be described with the separation main body 55 side, which is one end side, as the upper side and the cup part 56 side, which is the other end side, as the lower side.

  The separation main body 55 constitutes one end side (upper end side) of the dust collector 22, and is formed of, for example, a synthetic resin. The separation main body 55 is integrally formed with a first main body 61 that is inserted into the cup 56 and a second main body 62 that is basically positioned above the cup 56 and covers the cup 56. I have.

  The first main body 61 integrally includes a cylindrical separation portion 64 and a covered cylindrical compression portion 65 that is provided at the lower end of the separation portion 64 and has a diameter larger than that of the separation portion 64. . The first main body 61 is connected to the second main body 62 at the upper end (the upper end of the separation portion 64). The first body portion 61 (the separation portion 64 and the compression portion 65) is disposed substantially coaxially with the cup portion 56 with the separation body portion 55 and the cup portion 56 attached to each other.

  The separation portion 64 has a plurality of longitudinal ventilation openings 67 extending in the circumferential direction along the axial direction on the outer circumferential surface, and a filter 68 is provided to cover the ventilation openings 67. The separation part 64 is separated from the inner peripheral surface of the cup part 56 in a state where the separation main body part 55 and the cup part 56 are attached to each other. The first separation unit (first centrifugal separation unit) 69 that centrifuges (cyclonic separation) coarse dust, which is relatively large dust, is configured.

  The compression part 65 is a part that compresses and holds the dust that has been centrifuged by the first separation part 69 and is located away from the inner peripheral surface and the bottom surface of the cup part 56.

  On the other hand, the second main body 62 includes a main body 71, a cover 72 attached to the upper end that is one end of the main body 71, and a lid that covers the cover 72 and is attached to the upper end of the main body 71. 73 and a dust guide portion 74 attached to the lower end side which is the other end side of the main portion 71.

  The main body 71 is formed in a substantially cylindrical shape and is exposed at the upper portion of the cup portion 56. That is, the main body 71 has an outer surface formed in an arcuate surface (substantially cylindrical surface). In addition, the main body 71 has a cylindrical ventilation air passage 76 formed in the center, and a plurality of second separating portion main bodies 77 are formed around the ventilation air passage 76. . Further, the main body 71 has upper end portions of the ventilation air passage portion 76 and the second separation portion main body 77 connected to each other by a flat upper surface portion 79 that is a facing surface facing the lower portion of the cover 72. Yes. Further, an arc-shaped rib portion 81 is raised on the upper surface portion 79 so as to correspond to each second separating portion main body 77, and an air guide portion 82 is formed continuously with the rib portion 81. Has been. Further, outside the main body 71, a cup portion holding portion 84 as a dust containing portion holding portion that holds and holds the cup portion 56 with respect to the separation main body portion 55, and a lid 73 with respect to the main portion 71. A lid holding part 85 for locking and holding is attached.

  The ventilation air passage portion 76 is an air passage portion through which the dust-containing air that has passed through the first separation portion 69 passes. In other words, the lower end portion, which is the downstream end portion, of the ventilation air passage portion 76 is connected to the separation portion 64 of the first main body portion 61 in an airtight and coaxial manner. Further, the ventilation air passage portion 76 is formed so as to be gradually reduced in diameter from the lower side which is the downstream side to the upper side which is the upstream side.

  Each second separating portion main body 77 is formed in a cylindrical shape whose inner peripheral surface gradually decreases in diameter from an upper end side which is one end side to a lower end side which is the other end side, that is, a truncated cone shape. Fine air, which is relatively small dust that has not been separated by the first separation portion 69, is centrifuged by swirling air along the peripheral surface. The second separation part main bodies 77 are arranged on the same circle so as to be spaced apart from each other at substantially equal intervals in the circumferential direction. The dust-containing air that has passed through the ventilation air passage part 76 passes through the air guide part 82 from the upper end side. Has been introduced. Further, the lower ends of the second separation unit main bodies 77 serve as dust discharge ports 86 for discharging fine dusts centrifuged by the second separation unit main bodies 77. These dust discharge ports 86 are disposed above the dust guide portion 74 so as to be spaced apart from each other, and communicate with the inside of the cup portion 56 with the separation main body portion 55 and the cup portion 56 attached to each other.

  The rib portion 81 is a portion that supports the cover 72 from below, and is formed coaxially with the second separation portion main body 77 along the outer edge of the upper end portion of the second separation portion main body 77. In addition, the rib portion 81 has an arc shape that opens on the side of the ventilation air passage portion 76, that is, on the center side of the separation main body portion 55 (main portion 71).

  The air guide portion 82 is provided continuously to the rib portion 81, and the dust-containing air that has passed through the ventilation air passage portion 76 is moved to the position of the upper end portion of each second separation portion main body 77, and the second separation portion main body 77. Are formed so as to be introduced along the tangential direction of the second separating portion main body 77.

  The cup portion holding portion 84 is located at the lower end portion of the main portion 71 at the lower portion (directly below) the exhaust port 59. The cup holder 84 is provided at a position facing the main body 29 (fitting portion 32) of the main body 21 in a state where the dust collector 22 is attached to the main body 21 (FIG. 6). Is not operated in a state of being attached to the main body 21.

  The lid holding part 85 is located above the cup part holding part 84 (directly above), below the exhaust port 59 (just below), and in the vicinity of the upper end part of the main part 71. The lid holding portion 85 is provided at a position facing the main body 29 (fitting portion 32) of the main body 21 with the dust collector 22 attached to the main body 21 (FIG. 6). The apparatus 22 is not operated with the apparatus 22 attached to the main body 21.

  The cover 72 is disposed on the upper surface 79 of the main body 71 and is covered with the lid 73 on the upper side. The cover 72 includes a cover main body 88 formed in a circular plate shape, a discharge opening 89 opened in the cover main body 88 corresponding to each second separation portion main body 77, and a lower portion of each of the discharge openings 89. A projecting discharge cylinder 90 and a filter body support 91 projecting upward from the cover body 88 facing the lid 73 are provided. The cover 72 covers the upper end portion of each second separation portion main body 77, whereby the second separation portion 92 is configured.

  The cover body 88 has a flat upper surface 88a which is the side surface of the cover 72 facing the lid 73, and an exhaust air passage 94 communicating with the exhaust port 59 is formed between the upper surface 88a and the lid 73. It is partitioned.

  Each discharge opening 89 communicates with the upper end side of each second separating portion main body 77, and has a circular shape formed with a diameter substantially equal to the upper end portion of each second separating portion main body 77. Similar to the two separating portion main bodies 77, they are arranged on the same circle so as to be spaced apart from each other at substantially equal intervals in the circumferential direction. These discharge openings 89 are configured so that the air in which the dust is centrifuged in each second separation portion main body 77 is discharged to the exhaust air passage 94. That is, these discharge openings 89 communicate each second separation portion main body 77 and the exhaust air passage 94.

  Each discharge cylinder portion 90 is formed in a cylindrical shape having a diameter dimension substantially equal to each discharge opening 89.

  For example, two filter body support portions 91 are formed surrounding the vicinity of the outer edge portion of the cover main body 88. These filter body support portions 91 sandwich the filter body 96 vertically with the lid body 73.

  The filter body 96 is located in the exhaust air passage 94, and when fine dust remains slightly in the air from which fine dust has been separated by the second separation portion 92 (second separation portion main body 77). Fine dust is collected, and is disposed along a direction intersecting (orthogonal to) the axial direction of the dust collector 22 so as to cover the upper part of all the second separating unit main bodies 77. The filter body 96 is spaced upward from the upper surface 88a of the cover main body 88 of the cover 72 by the filter body support portion 91, and is disposed to face the discharge openings 89.

  The lid 73 constitutes the upper end portion of the separation main body portion 55 (dust collector 22). The lid 73 has the exhaust port 59, and is provided with an attaching / detaching mechanism 98 that detachably locks the dust collector 22 to the main body 21.

  The dust guide portion 74 guides the fine dust discharged from the dust discharge port 86 of each second separation portion main body 77 outwardly with respect to the central axis of each second separation portion main body 77, and is directed downward. An inclined surface 74a inclined in an expanded shape is provided on the upper part facing the dust outlet 86.

  Further, the cup portion 56 constitutes the other end side (lower end side) of the dust collector 22, and is formed in a bottomed cylindrical shape with, for example, a light-transmitting synthetic resin. It is detachable coaxially with respect to the lower end. The cup portion 56 integrally includes a cup portion main body 101 as a bottomed cylindrical dust container main portion and an expanded portion 102 formed in an expanded shape at the upper end portion of the cup portion main body 101. Yes. Further, in the cup portion 56, the intake port 58 is opened at a position facing the main body portion 21 (main body 29), and a rotation fulcrum when the dust collector 22 is attached to the main body portion 21. A locking portion 104 is provided.

  The cup body 101 has the first body 61 disposed therein, and air is swirled between the outer periphery of the separation portion 64 of the first body 61. The cup part body 101 is a part that accumulates the coarse dust separated by the first separation part 69 inside.

  In the expanding portion 102, the dust guide portion 74 of the separation main body portion 55 is located inside, and a fine dust accommodating portion 106 for storing fine dust guided by the dust guide portion 74 is formed inside. Further, the upper end portion of the expanding portion 102 is a dust disposal port 107 for discarding dust in the cup portion 56.

  The locking portion 104 protrudes from the cup body 101 below the intake port 58. And this latching | locking part 104 is engaged with the fulcrum part 44 (FIG. 6) of the main-body part 21, and when attaching the dust collector 22 to the main-body part 21 by engagement with this fulcrum part 44, the up-down left-right direction And the attachment / detachment mechanism along the guide portions 51 and 51 by rotating the upper side of the dust collector 22 toward the main body portion 21 around the locking portion 104 at the position of the fulcrum portion 44. 98 is activated so that the dust collector 22 can be attached to the main body 21.

  The intake port 58 is airtightly connected to the intake communication port 47 when the dust collector 22 is attached. Therefore, the intake port 58 is airtightly connected to the main body connection port 41 (via the intake communication port 47) in a state where the dust collector 22 is mounted. The intake port 58 is configured to guide dust-containing air along the tangential direction of the cup portion 56 (cup portion body 101).

  The exhaust port 59 is airtightly connected to the exhaust communication port 48 when the dust collector 22 is attached. Therefore, the exhaust port 59 is airtightly connected to the suction side of the electric blower 34 (via the exhaust communication port 48) when the dust collector 22 is attached. Further, the exhaust port 59 is disposed above the intake port 58 and in the vicinity of the upper end of the dust collector 22, and is located above the side of the exhaust air passage 94 above the filter body 96. Yes. That is, the exhaust port 59 is disposed on the side opposite to the discharge opening 89 with respect to the filter body 96 and on the side of the discharge opening 89. In other words, the filter body 96 is located on an imaginary line connecting the exhaust port 59 and the exhaust opening 89. For this reason, the air passing from each discharge opening 89 to the exhaust port 59 passes through the filter body 96 in the vertical direction. In the present embodiment, the entire exhaust port 59 is located above the filter body 96. For example, the lower end portion of the exhaust port 59 is located slightly below the upper end portion of the filter body 96. It is good also as a structure. That is, that the exhaust port 59 is above the filter body 96 means that at least the upper end portion of the exhaust port 59 is located above the upper end portion of the filter body 96, and the lower end portion of the exhaust port 59 Includes a mode in which the filter body 96 is positioned below the upper end of the filter body 96. Further, the virtual line connecting the exhaust port 59 and the discharge opening 89 is, for example, a virtual straight line connecting the center position of the exhaust port 59 and the center position of the discharge port 89, or the edge of the exhaust port 89 and the exhaust port 59. An imaginary straight line connecting the upper edge of each other.

  The extension tube 16 shown in FIG. 7 is formed in an elongated shape, and the base end side is connected to the main body 21 (connection portion 26 (main body connection port 41)) of the cleaner body 15, and the dust collector 22 is connected. It is designed to be connected in an airtight manner. Further, on the distal end side of the extension pipe 16, a floor brush clamp portion 111 is provided as a suction port body clamp portion that detachably locks and holds the floor brush 17.

  The floor brush clamp unit 111 may use any known configuration, but is exposed to be operable on the upper portion of the extension pipe 16.

  The floor brush 17 includes a case body 114 that is horizontally long, that is, formed in a longitudinal shape in the left-right direction, and a connecting pipe 115 that is rotatably connected to the case body 114. In the case body 114, a suction port 116 is opened at a lower portion facing the surface to be cleaned. Further, the connection pipe 115 communicates with the suction port 116 and is hermetically connected to the distal end side of the extension pipe 16, and this connection is maintained by the floor brush clamp portion 111.

  Accordingly, an air path is configured from the floor brush 17 (suction port 116) to the extension pipe 16, the main body connection port 41, the dust collector 22 and the suction side of the electric blower 34.

  Next, the operation of the one embodiment will be described.

  When cleaning with the electric vacuum cleaner 11, as shown in FIG. 7, with respect to the vacuum cleaner main body 15 (main body portion 21 (main body connection port 41)) with the dust collector 22 attached to the main body portion 21, The base end side of the extension pipe 16 is connected and is detachably locked and held by the extension pipe clamp portion 43, and the connecting pipe 115 of the floor brush 17 is inserted and connected to the distal end side of the extension pipe 16 to connect the floor brush clamp. The part 111 is detachably locked and held. In this state, as shown in FIGS. 1 to 7, the floor brush 17 is connected to the dust collector 22 via the extension pipe 16, the main body connection port 41 of the cleaner body 15, the intake communication port 47, and the intake port 58. It communicates with the suction side of the electric blower 34 (through the exhaust port 59 of the dust collector 22 and the exhaust communication port 48 of the cleaner body 15).

  In the vacuum cleaner 11, the control means 35 is electrically operated by the operation set by the user holding the grip portion 31 placing the floor brush 17 on the surface to be cleaned and operating the setting button 53 of the grip portion 31. While driving the blower 34, the floor brush 17 is alternately driven in the front-rear direction and the diagonal direction on the surface to be cleaned, and sucks the dust on the surface to be cleaned using the negative pressure generated by the driving of the electric blower 34. . That is, the negative pressure generated by driving the electric blower 34 is the exhaust communication port 48, the dust collector 22, the intake port 58, the intake communication port 47, the main body connection port 41, the extension pipe 16, the floor brush 17 (the connection pipe 115 and Acting with the suction port 116), dust is sucked together with air from the suction port 116 of the floor brush 17.

  The sucked dust-containing air is sucked from the floor brush 17 through the extension pipe 16 into the dust collector 22 through the intake port 58. At this time, the dust-containing air is introduced along the tangential direction of the inner peripheral surface of the cup portion 56 (cup portion main body 101) through the intake port 58, and the inner periphery of the cup portion 56 (cup portion main body 101) is introduced. By rotating along the surface, the coarse dust is centrifuged by the first separation unit 69, compressed in the compression unit 65, and stored in the cup unit 56.

  The dust-containing air that has passed through the first separation portion 69 flows into the ventilation air passage portion 76 from each ventilation opening 67 while passing through the filter 68, flows along the upper surface portion 79 of the main body portion 71, and is directed to the air guiding portion. 82 is distributed to each second separator main body 77. At this time, the dust-containing air is introduced in the tangential direction of each second separation portion main body 77 along the air guide portion 82, and swirls along the inner peripheral surface of the second separation portion main body 77. Is centrifuged. The separated fine dust falls from the dust discharge port 86 and is collected in the fine dust accommodating portion 106 of the cup portion 56 along the inclined surface 74a of the dust guide portion 74. In addition, the air swirling in each second separation portion main body 77 rises along the central axis of the second separation portion main body 77 and is guided by the discharge cylinder portion 90 to the exhaust air passage 94 from the discharge opening 89. Discharged. The air discharged into the exhaust air passage 94 collects fine dust that remains slightly when passing through the filter body 96. At this time, since the discharge opening 89 and the filter body 96 are separated from each other, the air discharged from the discharge opening 89 passes through the filter body 96 while being inclined upward (in line W in FIG. 2). The pressure loss is suppressed. The air is discharged from the exhaust port 59 to the outside of the dust collector 22, sucked into the electric blower 34 to cool the electric blower 34, and then discharged to the outside of the cleaner body 15.

  When the cleaning is completed, the user operates the setting button 53 to stop the electric blower 34 by the control means 35, and attaches and stores the electric blower to the support device. When the dust collected in the dust collector 22 is to be discarded, the attachment / detachment mechanism 98 is operated to remove the dust collector 22 from the main body portion 21 and the cup portion holding portion 84 is operated to separate the main body portion. The cup part 56 is removed from 55 and the dust inside is discarded by the dust disposal port 107. The cup part 56 from which the dust has been discarded is attached to the separation main body part 55 again and used as the dust collector 22.

  According to the embodiment described above, the first separation unit 69 that centrifuges the dust and the second separation unit main body 77 of the second separation unit 92 that centrifuges the dust that has not been separated by the first separation unit 69. The cover 72 having a discharge opening 89 for discharging air from which dust has been centrifuged in the second separation unit main body 77 is covered with the upper end side of the second separation unit main body 77 and separated from the discharge opening 89. The filter body 96 is disposed at the position, and the cover 72 is covered with a cover body 73 having an exhaust port 59 at a position opposite to the discharge opening 89 and on the side of the filter body 96, for example, the second separation. The air concentrates only in a limited area around the area facing the discharge cylinder part of the filter body 96, as in the case where air discharged from the main body 77 through the discharge opening 89 passes through the elongated discharge cylinder part. Or by the side of the discharge cylinder due to pressure difference Without Dari wraps around a portion of the gas, air while spreading to a wide range of filter body 96 passes through the filter member 96 (FIG. 2) for, can suppress the pressure loss, it is possible to prevent deterioration of suction work rate.

  In particular, in the case of the rechargeable vacuum cleaner 11 using the secondary battery 36 as a power source, it is difficult to improve the suction force by the electric blower 34 compared to the case of a vacuum cleaner using an external power source such as a commercial AC power source. When cleaning the surface to be cleaned with a lot of fine dust, the second separation part 92 may not be able to separate fine dust (fine dust), so air flows only within a limited range of the filter body 96. In the configuration, clogging occurs in this range, and the pressure loss increases. Therefore, in this embodiment, the filter body 96 is disposed at a position separated from the discharge opening 89, and the exhaust opening 59 is provided on the opposite side of the discharge opening 89 with respect to the filter body 96. Air passing to the exhaust port 59 can be prevented from passing only through a local range of the filter body 96, and pressure loss can be suppressed.

  Moreover, since the filter body 96 is located on the imaginary line connecting the exhaust port 59 and the discharge opening 89, the filter body 96 basically passes through the filter body 96 to the discharge port 59 without being bent greatly. Since air flows smoothly in a straight line, the pressure loss can be more reliably suppressed as compared with the configuration in which the air path from the discharge opening 89 to the exhaust port 59 is bent.

  Further, by making the upper surface 88a of the cover 72 facing the lid 73 flat, a part of the air discharged from the discharge opening 89 is likely to spread over a wider area of the filter body 96 along the upper surface 88a. Pressure loss is unlikely to occur, and a reduction in suction work rate due to pressure loss can be prevented more reliably.

  Specifically, as shown in an example of the graph of FIG. 8, compared with a comparative example (shown by a broken line) exhausted from the second separation unit main body 77 through an elongated exhaust tube portion, the implementation corresponding to this embodiment. In the example (shown by the solid line), it can be seen that the suction work rate at the time when the air volume increases is improved.

  As described above, since the above-described embodiment can effectively suppress the pressure loss, it is not particularly easy to improve the suction force, and is preferably used for the cordless type vacuum cleaner 11 using the secondary battery 36. Can do.

  In the above-described embodiment, the stick type electric vacuum cleaner has been described in which the extension pipe 16 is directly connected to the vacuum cleaner body 15, but for example, a hose body or the like is used for the vacuum cleaner body that can run on the surface to be cleaned. The present invention can also be applied to a so-called canister-type vacuum cleaner that connects extension pipes via a self-propelled vacuum cleaner that travels autonomously.

  Although one embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 vacuum cleaner
22 dust collection equipment
36 Secondary battery as power supply
59 Exhaust vent
69 First separation part
72 Cover
73 lid
77 Second separator body
88a Top side
89 Discharge opening
92 Second separation part
96 Filter body

Claims (5)

A first separation unit that has an intake port for sucking dust-containing air, and centrifuges dust from the dust-containing air ;
A second separator for further centrifuging dust from the dust-containing air after being centrifuged by the first separator,
The second separator is
A plurality of second separation unit main bodies that are formed in a cylindrical shape whose inner peripheral surface gradually decreases in diameter from one end side to the other end side, and that swirls air along the inner peripheral surface;
A cover that covers one end side of the plurality of second separation unit main bodies and has a plurality of discharge openings through which air is discharged from each of the second separation unit main bodies,
A filter body disposed to face the plurality of discharge openings;
A lid having an exhaust port communicating with the discharge opening through the filter body on the side opposite to the discharge opening with respect to the filter body ,
The dust collector according to claim 1, wherein the intake port is located on a side opposite to the filter body with respect to the plurality of second separator main bodies . The dust collector according to claim 1, wherein the cover has a flat side surface facing the lid. Having a substantially cylindrical shape,
The dust collector according to claim 1 or 2, wherein the exhaust port is provided on a side surface. A vacuum cleaner comprising the dust collecting device according to any one of claims 1 to 3. The electric vacuum cleaner according to claim 4, further comprising a secondary battery as a power supply unit.

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