JP5368645B1 - Dust collector and vacuum cleaner - Google Patents

Abstract

An electric vacuum cleaner that suppresses the dust from being separated by a second centrifugal separator is provided.
A dust collector 27 includes a first centrifugal separator 90 that separates dust in dust-containing air. The dust collector 27 communicates with the first centrifugal separator 90 and separates the second centrifugal separator that separates dust smaller than the dust separated by the first centrifugal separator 90 in the dust-containing air that has passed through the first centrifugal separator 90. A separation unit 93 is provided. The dust collecting device 27 is opposed to the lower side of the second centrifuge unit 93 and tilts downward with respect to the second centrifuge unit 93 to remove the dust separated by the second centrifuge unit 93. (2) A wall 161 is provided to escape from below the centrifugal separator 93. The dust collecting device 27 includes a dust reservoir 165 that is partitioned by a wall 161 on the front end side of the wall 161 and that collects the dust guided by the wall 161.
[Selection] Figure 1

Description

  Embodiment of this invention is the 1st centrifuge part, and this 1st centrifuge part in the dust-containing air which was located in the axial direction one end side with respect to this 1st centrifuge part, and passed the 1st centrifuge part The present invention relates to a dust collector including a second centrifugal separator that separates dust that is smaller than the dust that is separated in step 1 and a vacuum cleaner having the dust collector.

  Conventionally, this type of vacuum cleaner includes a main body case that houses an electric blower and a dust collector that is detachably attached to the main body case. This dust collecting device is a so-called dust collecting cup, and separates and collects dust from dust-containing air sucked by driving of an electric blower.

  As such a dust collector, a so-called cyclone separation type is known in recent years, in which dust is centrifuged (cyclone separation) by swirling dust-containing air inside. In the case of such a cyclone separation type dust collector, the size and specific gravity of dust that can be separated are set according to the size (swivel diameter) of the centrifugal separator, so that centrifugal separators having different sizes are provided in multiple stages. Thus, it is configured so that dusts having different sizes and specific gravity in the dust-containing air can be separated.

JP 2006-346429 A

  It is preferable that dust having a small size and specific gravity, that is, fine dust, is collected in a place different from dust having a large size and specific gravity, that is, coarse dust so that the dust does not rise in the dust collector when the electric blower is driven again.

  Therefore, in the configuration described in Patent Document 1, a plurality of cylindrical second centrifuge units that centrifuge fine dust are provided around the first centrifuge unit that centrifuges and collects coarse dust. The fine dust separated by the two centrifugal separators is configured to be directly dropped and collected in a dust reservoir section defined immediately below the second centrifugal separator around the upper side of the first centrifugal separator.

  However, in this configuration, fine dust is located directly under each second centrifuge unit, so that the rising airflow generated in the center of each second centrifuge unit during centrifugation causes the dust reservoir to The accumulated fine dust may be rolled up and flow backward.

  The problem to be solved by the present invention is to provide a dust collector and a vacuum cleaner having the dust collector, in which the dust separated by the second centrifugal separator is prevented from being rolled up.

The dust collector of the embodiment is detachably provided in a main body case containing an electric blower, has an axial direction, and separates and collects dust from the dust-containing air sucked by the operation of the electric blower It is. The dust collector has a case portion that forms an outer shell, and includes a first centrifugal separation portion that separates dust in the dust-containing air and accumulates the dust in the case portion . In addition, the dust collecting device communicates with the first centrifugal separator, and the second centrifugal separator separates dust smaller than the dust separated by the first centrifugal separator in the dust-containing air that has passed through the first centrifugal separator. A separation unit is provided. Further, the dust collector is positioned opposite to the one end side in the axial direction with respect to the second centrifuge part and is inclined toward the other end side in the axial direction with respect to the second centrifuge part. A wall part is provided for allowing dust separated by the centrifugal separation part to escape from one axial end side of the second centrifugal separation part. The dust collector includes a dust reservoir section that is partitioned between the tip end side of the wall portion and the periphery of one end side in the axial direction of the case portion and stores dust guided by the wall portion.

It is sectional drawing which expands and shows the dust reservoir vicinity of the dust collector of the vacuum cleaner of one Embodiment. It is sectional drawing which shows a dust collector same as the above. It is a center sectional view showing a vacuum cleaner main part same as the above. It is a perspective view of a vacuum cleaner same as the above.

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

  In FIG. 4, reference numeral 11 denotes a so-called canister-type vacuum cleaner. The vacuum cleaner 11 has a pipe portion 12 that is a suction air passage body (air passage formation body) and a pipe portion 12 that is detachably connected. A vacuum cleaner main body 13.

  The pipe part 12 is provided on the distal end side of the hose body 16, the connecting pipe part 15 connected to the cleaner body 13, the flexible hose body 16 communicating with the distal end side of the connecting pipe part 15. The hand operating section 17, the extension pipe 18 detachably connected to the distal end side of the hand operating section 17, and the floor brush 19 as a suction port body detachably connected to the distal end side of the extension pipe 18 and the like And.

  In the hand operation unit 17, a loop-shaped gripping part 21 protrudes toward the hose body 16, and a plurality of operation setting buttons 22 are provided on the gripping part 21.

  As shown in FIGS. 1 to 4, the cleaner body 13 includes a body case 26 having large-diameter traveling wheels 23 on both sides and a turning wheel 24 and a grounding wheel 25 on the lower side. A dust collecting device 27, which is a dust collecting cup, can be attached to and detached from the upper portion, which is the outside. The cleaner body 13 is configured to be able to travel (move) at least along the front-rear direction on the floor surface, which is the surface to be cleaned, by the traveling wheel 23 and the turning wheel 24 or the ground wheel 25. Hereinafter, the front-rear direction and the left-right direction are based on the traveling (moving) direction of the cleaner body 13 (main body case 26).

  The main body case 26 is made of, for example, a synthetic resin, and supports a main body 31 located behind the dust collector 27 and a lower part of the front of the main body 31 to support the lower portion of the dust collector 27. And a protrusion receiving portion 32 as a dust collector supporting portion. Inside the main body case 26, a main body air passage portion 33 bent in an L shape in a side view is disposed across the main body portion 31 and the protruding receiving portion 32.

  The traveling wheels 23 are rotatably supported on both sides of the main body 31. Further, below the rear part of the main body 31, a grounding ring 25 that is grounded to the floor surface in a state where the front side of the vacuum cleaner main body 13 is lifted is rotatably attached to the central portion in the left-right direction. Further, on the upper side of the front part of the main body 31, a loop-like handle 34 for gripping the cleaner main body 13 (main body case 26) is provided so as to be inclined toward the rear. In addition, an electric blower chamber 35 is partitioned on one side of the lower part, for example, the right side, and a power supply chamber (not shown) is partitioned on the other side, for example, the left side. A filter chamber 37 is defined adjacent to the filter chamber 37, and a communication air passage section 38 is defined adjacent to the upper side of the filter chamber 37. The electric blower chamber 35 accommodates an electric blower 39 and a control circuit unit as a control means (not shown) for controlling the operation of the electric blower 39. The power supply chamber rotatably accommodates a cord reel device (not shown) as a power supply unit in which a power cord capable of supplying power from an external power source to the electric blower 39 and the like is wound. Further, a filter portion 42 located between the downstream side of the dust collector 27 and the suction side of the electric blower 39 can be attached to and detached from the filter chamber 37.

  Further, a communication opening 45 that is airtightly connected to the upstream side of the dust collector 27 is formed in the lower part of the front part of the main body part 31, and a communication air passage is formed in the upper part of the front part of the main body part 31. An air intake opening 46 is formed in airtight communication with the portion 38 on the downstream side of the dust collector 27 attached to the main body case 26. A rear surface portion 47 is formed on the rear portion of the main body portion 31.The rear surface portion 47 is an outer surface that is located above the grounding wheel 25 and extends in a planar shape (planar shape) along the vertical and horizontal directions. A plurality of exhaust holes 48 communicating the electric blower chamber 35 and the outside of the main body case 26 are formed in the rear surface portion 47, and the filter chamber 37 and the main body case 26 are disposed on one side above the exhaust holes 48. A detachable opening 49 that communicates with the outside of the device is formed, and a cord outlet (not shown) for connecting the power supply chamber and the outside of the body case 26 to and from the outside of the body case 26 is provided on the other side above the exhaust hole 48. Is formed.

  Further, a main body suction port 52 to which the connection pipe portion 15 of the pipe portion 12 is connected is formed on the front surface of the protrusion receiving portion 32, and the main body suction port 52 is connected to the upstream end opening of the main body air passage portion 33. It has become. Therefore, the main body suction port 52 communicates with the communication opening 45 via the main body air passage portion 33, and can communicate with the upstream side of the dust collector 27 via the communication opening 45.

  The operation of the electric blower 39 is controlled by the control circuit unit according to the operation of the setting button 22. The electric blower 39 is arranged with the suction side as the upper side, and the lower side, which is the exhaust side, is supported by the bottom 55 of the main body case 26.

  The control circuit unit is electrically connected to the setting button 22, and the operation mode set by the operation of the setting button 22 (e.g., strong mode, medium mode, weak mode, automatic mode, stop mode, etc.). The operation of the electric blower 39 is set.

  The filter chamber 37 communicates with the intake opening 46 at the upper part, that is, the upstream side through the communication air passage part 38 through the ventilation opening 61, and at the lower part, that is, at the downstream side, the electric blower chamber 35 through the communication opening 62. Is connected to the electric blower 39 in an airtight manner.

  The filter unit 42 collects dust that has passed through the dust collector 27 and includes (first and second) filters 68 and 69, and is attachable to and detachable from the outside of the main body case 26 in the filter chamber 37. It has become.

  On the other hand, the dust collector 27 is detachably provided with a case portion 85 as a first main body portion located on the lower side and a separator 86 as a second main body portion located on the upper side of the case portion 85. . The separator 86 is inserted into the case 85 to form a first centrifugal separator 90. The inner cylinder 91, a ventilation air passage 92, and a plurality of second centrifugal separators 93, for example. The air passage portion 94 has a unit shape. The dust collector 27 is attached to the main body case 26, the rear side is fitted to the front portion of the main body 31, and the upper side is inclined rearward (a state parallel to the handle 34). Fixed).

  The first centrifugal separation unit 90 mainly collects relatively large dust, that is, coarse dust, which is a part of the dust-containing air sucked into the interior by driving the electric blower 39, by centrifugal separation.

  The case portion 85 is formed of a member such as a transparent (transparent) synthetic resin, for example, and forms an outer shell of the first centrifugal separation portion 90. Therefore, the first centrifuge 90 is visible from the outside. In addition, a space 96 that faces the lower part of the second centrifugal separator 93 is defined in the upper part of the case part 85. Further, an introduction port 97 for sucking in the dust-containing air is opened at a rear portion of the case portion 85 at a position biased to one side, for example, the right side. Further, a dust collector handle 98 for gripping the dust collector 27 (case portion 85) is provided outside the case portion 85. Further, on both sides of the rear portion of the case 85, positioning projections (not shown) are provided for positioning when the dust collector 27 is attached to the main body case 26.

  The space portion 96 is provided in a cylindrical shape and extends upward continuously from the entire peripheral edge portion of the upper end portion of the case portion 85. That is, the space portion 96 is defined by the inclined surface portion 101 integrally formed at the upper end portion of the case portion 85 so as to be inclined downward from the peripheral side to the center side. Therefore, the space portion 96 communicates with the first centrifuge portion 90 (case portion 85).

  The introduction port 97 extends rearward substantially horizontally, and is airtightly connected to the communication opening 45 in a state where the dust collector 27 is attached to the main body case 26. Therefore, the introduction port 97 is airtightly connected to the main body suction port 52 via the communication opening 45 and the main body air passage portion 33.

  Further, the dust collector handle 98 is provided at the rear of the case 85 and on the side of the inlet 97, in other words, in the vicinity of the inlet 97. The dust collector handle 98 is provided, for example, in the vertical direction, that is, parallel to the axial direction of the case 85 (first centrifuge 90).

  Further, the positioning convex portions are located on both sides of the upper side of the introduction port 97, and when the dust collecting device 27 is attached to the main body case 26, the positioning convex portions are vertically arranged on the front portion of the main body portion 31 of the main body case 26. It is inserted into a lower end portion of a positioning receiving portion (not shown) formed in a longitudinal shape along the longitudinal direction.

  In addition, the inner cylinder 91 is disposed at the center of the case portion 85 and serves as a turning center of the first centrifugal separation portion 90, and includes dust between the outer periphery and the inner peripheral surface 85a of the case portion 85 (periphery). A swirling air passage 106 for swirling air is formed, and the first centrifugal separator 90 and each second centrifugal separator 93 side (aeration air passage 92) are connected through the inside. The inner cylinder 91 is formed in a substantially bottomed cylindrical shape from a material such as a synthetic resin containing at least carbon and has conductivity, and an exhaust cylinder portion 108 which is a substantially cylindrical structure body and The exhaust tube portion 108 includes a shade portion 109 which is a compression portion provided coaxially on the lower end side. That is, at least the exhaust cylinder part 108 and the shade part 109 of the inner cylinder 91 are formed of a material such as a synthetic resin containing at least carbon. Further, the upper end portion of the inner cylinder 91 is integrally fixed to the separating body 86 and can be attached to and detached from the case portion 85 together with the separating body 86.

  The exhaust cylinder portion 108 includes a plurality of openings 111 in the circumferential direction through which dust-containing air swirling the swirling air passage 106 passes, and the entire opening 111 is covered with a separation filter 112. Further, the lower end portion of the exhaust tube portion 108 is a bottom surface portion 113 that is an inclined surface that is inclined so as to gradually protrude upward from the peripheral side, that is, the outer edge side toward the center (center) side. It is blocked by. The bottom surface portion 113 has, for example, a spherical shape obtained by cutting off a part of a spherical surface or a parabolic shape, and the center portion is curved without being sharpened.

  The shade unit 109 compresses the coarse dust separated in the first centrifugal separation unit 90 by using the negative pressure generated by driving the electric blower 39, and the diameter of the shade unit 109 extends from the periphery of the lower end of the exhaust tube unit 108. A circular top plate portion 115 protruding like a bowl in the direction, and a peripheral plate portion 116 as a folded portion protruding downward from the outer peripheral edge of the top plate portion 115 in the opposite direction to the exhaust tube portion 108; Are integrally open and open downward. Therefore, the shade portion 109 has a larger diameter than the exhaust tube portion 108 and protrudes in the radial direction with respect to the exhaust tube portion 108. Further, a plurality of compression openings 117 are opened in the top plate portion 115 at substantially equal intervals in the circumferential direction, and these compression openings 117 are covered with a compression filter 118. Further, the shade portion 109 has a central portion that is the back surface of the bottom surface portion 113 of the exhaust tube portion 108. Therefore, the central portion of the shade portion 109 protrudes upward on the downstream side. The shade portion 109 is spaced upward from the bottom of the case portion 85 so that a part of the dust-containing air swirling the swirling air passage 106 circulates from the lower side to the compression opening 117. By passing, it is configured so that coarse dust is pressed against the compression filter 118 and accumulated in a compressed state.

  The separating body 86 holds the first air path body 121, the second air path body 122, the introduction air path body 123, the separation air path body 124, the upper lid portion 125, the inner cylinder 91, and the inner cylinder 91. The holder 126 is integrally formed with a cylindrical shape, and has a diameter larger than the diameter of the case 85 (first centrifuge 90).

  The first air passage body 121 is formed of a material such as a synthetic resin containing at least carbon and has conductivity, and has a substantially cylindrical guide diameter that decreases from the lower upstream side to the upper downstream side. A wind portion 131, a substantially cylindrical tube portion 132 located at the center of the air guide portion 131, and a duct portion 133 that communicates with the tube portion 132 and extends in the radial direction toward the rear are provided.

  The second air passage body 122 is formed of a material such as a synthetic resin containing at least carbon and has conductivity, and is formed in a cylindrical shape that expands from the lower side to the upper side. The tube portion 132 is airtightly connected, and the outer edge portion is in contact with the inner edge portion of the upper lid portion 125.

  The introduction air passage body 123 is located between the first air passage body 121 and the second air passage body 122 and is made of a material such as a synthetic resin containing at least carbon and has conductivity. A cylindrical connecting tube portion 135 that expands from the lower side to the upper side and has a lower end portion hermetically connected to the upper end portion of the air guide portion 131, and is provided in a spiral lid shape on the outer edge portion of the connecting tube portion 135. Each of the second centrifugal separators 93 includes a swivel portion 136 that forms an upper end portion, and an exhaust portion 137 that is integrally provided in a cylindrical shape at the center of each swivel portion 136. The upper end portion of the exhaust portion 137 is inserted and connected in an airtight manner to a circular connection hole 138 opened near the outer edge of the second air passage body 122.

  Further, the separation air passage body 124 is made of a material such as synthetic resin containing at least carbon and has conductivity, and is located outside the connecting cylinder portion 135 and has a lower end portion of each second centrifugal separation portion 93. A plurality of swivel cylinders 141 which are cone parts as a second centrifuge part body formed, and a cover part 142 covering the periphery of these swirl cylinders 141 are provided.

  The swivel cylinder 141 is formed with a smaller diameter than the case 85 of the first centrifugal separator 90, and is gradually reduced in diameter from the upper end to the lower end. Further, the swirl portions 136 of the introduction air passage body 123 are fitted to the upper end portions of the swirl tube portions 141, respectively, and the lower end portions of the swirl tube portions 141 communicate with the space portions 96, respectively. .

  The cover portion 142 forms the outer peripheral surface of the separator 86. Further, for example, a rectangular exhaust opening 144 that communicates with the duct part 133 and forms the downstream end of the air passage part 94 is opened in the cover part 142 at the rear part of the central part in the left-right direction. Projections not shown are provided on both sides of 144. Therefore, these protrusions are formed of a material such as a synthetic resin containing at least carbon and have conductivity.

  The exhaust opening 144 is located between the second centrifuge parts 93 and 93 on the rear side. The exhaust opening 144 is airtightly connected to the intake opening 46 in a state where the dust collector 27 is attached to the main body case 26. Therefore, the exhaust opening 144 is airtightly connected to the suction side of the electric blower 39 via the intake opening 46. Further, the exhaust opening 144 is located on the rear side of the dust collector 27 that is on the same side as the introduction port 97, and in front of the main body 31 of the main body case 26 with the dust collector 27 attached to the main body case 26. Opposite the part.

  The upper cover 125 is made of a material such as synthetic resin containing at least carbon and has conductivity, and is connected to the upper end of the separation air passage body 124 so as to cover the upper side of the introduction air passage body 123. . Further, the upper lid portion 125 is formed with a circular upper concave portion 147 in a plan view that is depressed downward along the curved shape of the second air passage body 122, for example, in the upper central portion. A dust collector clamp 148 as a locking device is attached from 147 to the rear part of the central portion in the left-right direction.

  The dust collector clamp 148 includes an operation handle portion 151 for operation that fits into the upper concave portion 147, and a locking claw portion 152 as a locking portion that operates by operating the operation handle portion 151.

  The operation handle portion 151 has an outer edge along the inner edge of the upper concave portion 147 from both sides to the rear, the front end portion is linear along the left-right direction, and a part of the circle is seen in plan view. It has a cut shape. Further, the operation handle portion 151 is pivotally supported at the rear end portion thereof so as to be rotatable with respect to the upper lid portion 125. Therefore, the front portion of the operation handle portion 151 is spaced rearward with respect to the inner edge of the upper recess portion 147, and the user inserts a finger into the upper recess portion 147 and lifts the front side of the operation handle portion 151 upward. It is possible to operate.

  Further, the locking claw 152 is a locking receiving portion that is opened above the intake opening 46 at the front of the main body 31 of the main body case 26 when the dust collector 27 is attached to the main body case 26. The dust collecting device 27 is locked to the main body case 26 by being inserted into and engaged with the locking opening 153. The locking claw 152 is made of a material such as synthetic resin containing at least carbon and has conductivity, and the upper end is pivotally supported by the upper lid 125 so that the cover 142 In contact with. In addition, the locking claw portion 152 protrudes from the rear portion of the upper lid portion 125 to the rear side. Further, the latching claw 152 is biased in the direction of advancing backward by a coil spring 154 as a latching portion biasing means. The upper end of the locking claw 152 is in contact with the rear end of the operation handle 151, and the operation handle 151 is rotated upward from the upper recess 147 so that the locking claw 152 The upper side is pushed downward, and the locking claw 152 is configured to retreat forward against the bias of the coil spring 154.

  A terminal portion 156 that is electrically connected to the locking claw portion 152 when the locking claw portion 152 is inserted and engaged is disposed inside the locking opening 153. The terminal portion 156 constitutes a part of a ground path 157 that is electrically connected to ground (ground potential) such as a control circuit portion.

  The holding body 126 is made of a material such as synthetic resin containing at least carbon and has conductivity, and is formed in an annular shape in which the upper end side of the exhaust cylinder portion 108 of the inner cylinder 91 is inserted into the center portion. In addition, the wall 161 projects downward from the outer peripheral edge. The holder 126 is detachably attached to the lower end of the separator 86, that is, the lower portion of the first air passage body 121.

  The wall portion 161 protrudes downward from the separator 86, and a packing 163, which is a closing member such as elastomer or rubber having flexibility and elasticity, is attached to the distal end side. Further, the wall portion 161 is continuous in the circumferential direction of the holding body 126, and faces the lower side of each second centrifuge portion 93 in a state where the holding body 126 is attached to the separation body 86. Further, the wall portion 161 is inclined outward and downward. And this wall part 161 is the case inside the space part 96 by the packing 163 being press-contacted with the inclined surface part 101 of the case part 85 in the state which attached the separator 86 above the case part 85. Between the portion 85 and the wall portion 161, a dust reservoir 165 for storing the dust separated by the second centrifugal separator 93, that is, the fine dust D, is defined. That is, the dust reservoir 165 is located around the upper side of the first centrifugal separator 90 and is located outside the air flow path that passes through the dust collector 27. In other words, the negative pressure generated by driving the electric blower 39 does not substantially act on the dust reservoir 165, and air does not flow. The wall 161 is inclined so that the fine dust D separated by the second centrifugal separators 93 is below (directly below) the second centrifugal separators 93, in other words, the second centrifugal separators. With respect to the central axis position of 93, it escapes to a position shifted laterally and is guided to the dust reservoir 165.

  The ventilation air passage 92 connects the first centrifugal separator 90 and the second centrifugal separators 93 in an airtight manner. The ventilation air passage portion 92 is formed between the tube portion 132 of the first air passage body 121 and the duct portion 133, and between the second air passage body 122 and the connection air passage body 123 and the swivel portion 136. Are communicated with each second centrifuge unit 93 (inside the swivel tube part 141) via the swivel part 136. Therefore, the ventilation air passage 92 is rectified while reducing the flow rate of the dust-containing air from the upstream side (downstream side of the first centrifuge unit 90) to the downstream side (upstream side of the second centrifuge unit 93). It is configured as follows.

  Each of the second centrifuges 93 has a swirl radius of the dust-containing air smaller than that of the first centrifuge 90 and a swirl speed larger than that of the first centrifuge 90. As a result, the dust that is (relatively) smaller than the dust centrifuged in the first centrifuge 90 in the dust-containing air that has passed through the first centrifuge 90, that is, the fine dust D is centrifuged to obtain a space. It is dropped into the part 96. In other words, each second centrifuge unit 93 centrifuges dust that could not be separated by the first centrifuge unit 90 in the dust-containing air. The second centrifugal separation unit 93 is partitioned above the first centrifugal separation unit 90 and between the swirl unit 136 and the exhaust unit 137 of the introduction air passage body 123 and the swirl tube portion 141 of the separation air passage body 124. The dust-containing air that has passed through the ventilation air passage 92 from the swirling part 136 is spirally introduced into the inside along the tangential direction of the inner peripheral surface of the swivel cylinder part 141 and swirled in the swirl cylinder part 141. The fine dust D that has been centrifuged is dropped from the lower end portion to the dust reservoir 165 via the wall portion 161, and air that is substantially free of dust and separated from the fine dust D is blown from the exhaust portion 137. It is configured to exhaust to the portion 94. The second centrifugal separators 93 are circularly spaced apart from each other at substantially equal intervals at positions excluding the rear part (air passage part 94) around the central axis of the dust collector 27 (first centrifugal separator 90). It is arranged in an arc (on the same circumference). The second centrifugal separators 93 are formed of a material for forming the introduction air passage body 123 and the separation air passage body 124 constituting the second centrifugal separator 93, that is, a material such as a synthetic resin containing at least carbon. ing. For this reason, the second centrifuge part 93 is electrically connected to the locking claw part 152 via the upper lid part 125 and set to the same potential as the locking claw part 152. The second centrifugal separator 93 is electrically connected to the holding body 126 (wall portion 161) and the inner cylinder 91 via the first air passage body 121, so that the holding body 126 (wall portion 161) and The same potential as that of the inner cylinder 91 is set.

  Further, the air passage portion 94 is airtightly partitioned from each exhaust portion 137 between the upper lid portion 125 and the second air passage body 122 by the cylindrical portion 132 and the duct portion 133 of the first air passage body 121. That is, the air passage portion 94 communicates with the downstream side of all the second centrifuge units 93, and from above the second centrifuge units 93, to the side of the second centrifuge units 93, in this embodiment. In addition, the second centrifuge units 93 arranged in an arc shape (substantially circular shape) continue to the center of the second centrifugal separation unit 93 so as to gradually reduce the flow rate of air, and are bent backward.

  Next, the cleaning operation according to the embodiment will be described.

  When cleaning is started, first, the separator 86 is attached to the case portion 85 and assembled integrally. At this time, the lower end side, which is the front end side of the wall portion 161 protruding from the separator 86, is in close contact with the inclined surface portion 101 of the case portion 85 via the packing 163, so that the space portion 96 of the case portion 85 and the wall portion 161 are A dust reservoir 165 is defined between them. Then, the assembled dust collector 27 is attached to the main body case 26. That is, the dust collecting device 27 is inserted and positioned with the positioning convex portion and the protruding portion aligned with the positioning receiving portion on the main body case 26 side, and is placed and supported on the protruding receiving portion 32 of the main body case 26. The dust collecting device 27 is introduced by locking the dust collecting device 27 with respect to the main body case 26 by inserting and locking the locking claw portion 152 of the dust device clamp 148 into the locking opening 153 of the main body case 26. The port 97 and the exhaust opening 144 are airtightly connected to the communication opening 45 and the intake opening 46 of the main body case 26, respectively. Therefore, the dust collector 27 is attached to the main body case 26 in an airtight connection between the suction side of the electric blower 39 and the main body suction port 52.

  At this time, the locking claw portion 152 comes into contact (pressure contact) with the terminal portion 156 in the locking opening 153, so that the locking claw portion 152 is connected to the control circuit portion or the like via the terminal portion 156 and the ground path 157. Electrically connected to earth (earth potential). Therefore, each part of the separator 86 (the second centrifuge part 93 (the swivel cylinder part 141) and the projection part, etc.), the wall part 161, and each part of the inner cylinder 91 (set to the same potential as the locking claw part 152) The exhaust cylinder portion 108 and the shade portion 109 are also at the same potential as the ground (ground potential) of the control circuit portion or the like.

  Note that when the dust collector 27 is already attached to the main body case 26, these operations are not necessary.

  In this state, the pipe portion 12 is connected to the main body suction port 52 of the cleaner main body 13 (main body case 26). Specifically, the pipe part 12 inserts and connects the connection pipe part 15 to the main body suction port 52, and sequentially connects the extension pipe 18 and the floor brush 19 to the distal end side of the hand operation part 17 as necessary. In this state, the setting button 22 of the hand operation unit 17 is electrically connected to a control circuit unit in the cleaner body 13 (main body case 26) and the like. In addition, when the pipe part 12 is already connected to the cleaner body 13, these operations are unnecessary.

  Then, after the user pulls out the power cord from the cord outlet and connects it to an outlet such as a wall surface, the user sets the operation mode of the electric blower 39 by gripping the grip portion 21 and operating the desired setting button 22. To do. The control circuit unit controls the input of the electric blower 39 corresponding to the set operation mode, and starts the electric blower 39 in the set operation mode.

  The negative pressure generated by the activation of the electric blower 39 is the filter chamber 37 (filter portion 42), the communication air passage portion 38, the intake opening portion 46, the exhaust opening 144, the air passage portion 94, the second centrifugal separation portion 93, and the ventilation. It acts on the pipe portion 12 through the air passage portion 92, the first centrifugal separation portion 90, the introduction port 97, the communication opening portion 45, the main body air passage portion 33 and the main body suction port 52.

  The user sucks dust together with air from the front end side of the floor brush 19, the extension pipe 18, or the hand operation unit 17 by the action of the negative pressure.

  The dust-containing air, that is, the dust-containing air, is guided from the pipe portion 12 to the introduction port 97 via the main body suction port 52, the main body air passage portion 33, and the communication opening portion 45, and is collected from the introduction port 97. It is sucked into the device 27, that is, into the first centrifuge 90.

  In the first centrifugal separator 90, the dust-containing air swirls in the swirl air passage 106, so that particularly coarse dust in the dust-containing air is centrifuged and falls along the inner peripheral surface 85 a of the case portion 85. And is stored on the bottom. The coarse dust is carried from the swirling air passage 106 to the shade portion 109 of the inner cylinder 91 by a part of the flow of the dust-containing air, and the dust-containing air passes through the compression opening 117 of the shade portion 109. Thus, compression is performed in the shade unit 109 by the compression filter 118.

  The dust-containing air from which the coarse dust has been separated is filtered by the separation filter 112 when passing through the opening 111 of the exhaust cylinder portion 108 of the inner cylinder 91. Further, the dust-containing air that has passed through the separation filter 112 is conveyed along the bottom surface 113 to the ventilation air passage 92 while being rectified to the upper side, which is the downstream side. The dust-containing air is rectified by gradually reducing the flow rate in the ventilation air passage 92, and is branched into the second centrifugal separators 93 (in the swivel cylinder 141) by the swirlers 136, respectively. Inflow.

  In these second centrifugal separators 93 (the swirl tube portion 141), the dust-containing air is swung along the inner peripheral surface (the inner peripheral surface of the swirl tube portion 141), and the fine dust D in this dust-containing air is centrifuged. Separated and falls along the second centrifuge part 93 (inner peripheral surface of the swivel cylinder part 141), along the slope of the wall part 161 below (directly below) each second centrifuge part 93, in other words, With respect to the central axis position of the second centrifugal separator 93, the second centrifugal separator 93 is guided to a position shifted laterally and stored in the dust reservoir 165.

  The air substantially free of dust from which the fine dust D has been centrifuged is exhausted from the exhaust portion 137 at the center of each second centrifugal separation portion 93 to the air passage portion 94 and merges. The flow rate is reduced by the portion 94 and guided rearward, and exhausted from the exhaust opening 144 to the outside of the dust collector 27.

  Thereafter, the air sequentially passes through the communication opening portion 38 and the filters 68 and 69 of the filter portion 42 from the intake opening 46, and then sucked into the electric blower 39, while cooling the inside of the electric blower 39. It passes through and becomes exhaust air, and is exhausted from the electric blower 39 to the outside of the main body case 26 through the exhaust hole 48.

  When the cleaning is completed, the user operates the predetermined setting button 22 so that the control circuit unit reduces the input of the electric blower 39 and stops the electric blower 39.

  When a certain amount of dust accumulates in the dust collector 27, the user lifts the operation handle portion 151 of the dust collector clamp 148 to retract the locking claw 152 from the locking opening 153, The dust collector 27 is removed from the main body case 26.

  Then, when the separator 86 is removed from the case portion 85, the inner cylinder 91 is pulled out from the case portion 85 integrally with the separator 86, and the close contact with the inclined surface portion 101 of the wall portion 161 (packing 163) is released, The fine dust D stored in the dust storage portion 165 falls into the case portion 85 along the inclination of the inclined surface portion 101, falls on the upper side of the coarse dust stored in the case portion 85, and this coarse dust. Mix with dust.

  In this state, the user grips the dust collector handle 98 and carries the dust collector 27 to a disposal position such as a waste bin, and then turns the upper side to tilt downward. The coarse dust accumulated in the compressed state in the case portion 85 and the fine dust D mixed with the coarse dust are discarded together.

  According to the embodiment described above, the fine dust that is separated by the second centrifuge unit 93 by the wall 161 that faces the lower side of the second centrifuge unit 93 and is inclined downward. Dust D is allowed to escape from the lower side (directly below) of the second centrifuge unit 93 to the side, and is stored in the dust storage unit 165 provided around the upper side of the first centrifuge unit 90, whereby the second centrifuge unit 93 is obtained. The fine dust D separated in step (3) does not accumulate directly below the second centrifugal separator 93. Here, in the second centrifugal separator 93 (the swirl cylinder 141), the dust-containing air is swirled inside to centrifuge the fine dust D, and the air in which the fine dust D is centrifuged passes through the central portion. Since it flows out upward, an ascending air current is generated in the center. Therefore, the fine dust D collected in the dust reservoir 165 escapes from the central portion (center axis position) of the second centrifugal separator 93 (the swivel cylinder portion 141) to the side, so that the second centrifugal separator 93 It becomes difficult to wind up by the rising airflow generated in the central portion of the (swivel cylinder portion 141).

  Further, for example, when the dust reservoir is formed at a position separated from the lower side of the second centrifugal separator 93 in order to suppress the winding of the fine dust D due to the ascending air current, the first centrifugal separator 90 includes The dust reservoir will be located on the lower outer periphery, and fine dust inside the dust reservoir will prevent the inside of the first centrifuge 90 from being visible from the outside, reducing the user's sense of achievement or performing the second centrifuge. The fine dust D falling from the portion 93 may stick to the inner surface of the dust reservoir and may not be efficiently stored in the dust reservoir, and the diameter of the case portion 85 increases. On the other hand, when the dust reservoir is partitioned into the central portion of the first centrifuge 90, the accommodation volume of dust (coarse dust) in the first centrifuge 90 is reduced. Therefore, by forming the dust reservoir 165 around the upper side of the first centrifugal separator 90 as in the present embodiment, it is possible to prevent such a problem from occurring. In addition, as described above, the fine dust D is released from below (directly below) the second centrifugal separator 93 by the wall 161, so that the fine dust D is rolled up by the rising air current generated in the central portion of the second centrifugal separator 93. Hard to occur.

  Furthermore, since the wall portion 161 is inclined downward toward the outside, the upper surface that guides the fine dust D is exposed to the user side so that it is easy to see, and the fine dust D attached to the upper surface of the wall portion 161, etc. Can be easily removed, and maintainability is improved.

  By forming the wall 161 from a material containing at least carbon, it is difficult to generate static electricity on the wall 161, and it is possible to suppress the fine dust D from remaining on the upper surface of the wall 161 due to this static electricity. , Maintenance is improved.

  Moreover, the locking claw portion 152 that locks the dust collector 27 with respect to the main body case 26 is formed of a material containing at least carbon, and the main body case 26 has a locking opening 153 that receives the locking claw portion 152. By providing a grounding path 157 that is electrically connected to the locking claw portion 152 received by the locking opening 153, when the dust collecting device 27 is mounted on the main body case 26, the locking opening 153 The inserted locking claw portion 152 is electrically connected to the ground path 157 via the terminal portion 156. Therefore, the wall 161 projecting from the holding body 126 set to the same potential as the locking claw 152 can be reliably set to the ground potential via the locking claw 152 and the ground path 157, and the static electricity can be further increased. Can be surely escaped.

  In the above-described embodiment, the vacuum cleaner 11 is not limited to one that is fed from an external power source by a cord reel device, and may be a so-called cordless type that incorporates a battery such as a secondary battery as a power source.

  Furthermore, the vacuum cleaner 11 is not limited to the canister type, and for example, a so-called upright type in which a floor brush 19 is connected to the lower end of the body case 26 that is long in the vertical direction can be used correspondingly. .

  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
26 Main unit case
27 Dust collector
39 Electric blower
85 case
90 First centrifuge
93 Second centrifuge
161 Wall
165 Dust reservoir

Claims (4)

A dust collector that is detachably provided in a body case that houses an electric blower, has an axial direction, and separates and collects dust from dust-containing air sucked by the operation of the electric blower,
A first centrifuge having a case portion forming an outer shell, separating dust in the dust-containing air and collecting the dust in the case portion ;
A second centrifuge that communicates with the first centrifuge and separates dust that is smaller than the dust separated by the first centrifuge in the dust-containing air that has passed through the first centrifuge;
The second centrifuge part is positioned opposite to the one end side in the axial direction with respect to the second centrifuge part and is inclined toward the other end side in the axial direction with respect to the second centrifuge part. A wall part for releasing the dust separated in step 1 from the one end side in the axial direction of the second centrifuge part;
A dust collection part that is partitioned between a tip end side of the wall part and a periphery of one end side in the axial direction of the case part, and that collects dust guided by the wall part. Dust equipment. The dust collector according to claim 1, wherein the wall portion is inclined outward toward the other end side in the axial direction with respect to the second centrifugal separation portion. The dust collector according to claim 1 or 2, wherein the wall portion is formed of a material containing at least carbon. A body case containing an electric blower;
A dust collecting device according to any one of claims 1 to 3, wherein the dust collecting device is detachably provided on the main body case and separates dust from the dust-containing air sucked by the operation of the electric blower.
A vacuum cleaner characterized by comprising:

Images