JP2014018301A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner which suppresses turbulence of dust-containing air inside an inner cylinder and prevents dust from getting easily accumulated at a bottom surface part of the inner cylinder.SOLUTION: A dust collecting device 27 includes a first centrifugal separation part 90 which has a case part 85 and an inner cylinder 91 positioned at a center part of the case part 85, and separates dust in dust-containing air by rotating the dust-containing air inside the case part 85 around the inner cylinder 91. The dust collecting device 27 includes a second centrifugal separation part 93 which is communicated with the first centrifugal separation part, and separates dust smaller than the dust separated in the first centrifugal separation part 90, in the dust-containing air which has passed through the first centrifugal separation part 90. The inner cylinder 91 has a cylindrical exhaust cylinder part 108 having an opening 111 where the dust-containing air passes through on the periphery. The inner cylinder 91 has a separation filter 112 which covers the opening 111. The inner cylinder 91 includes a bottom surface part 113 which closes an end part of the exhaust cylinder part 108, and is an inclined surface inclined toward a downstream side from the peripheral side to a center side.

Description

  The embodiment of the present invention includes a structure that is located at the center of the case, and includes a centrifugal separator that separates dust in the dust-containing air by swirling the dust-containing air around the structure. It relates to a vacuum cleaner.

  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 separation unit. By providing the two centrifugal separators, it is configured to be able to separate dust having different sizes and specific gravity in the dust-containing air.

  The first centrifuge has a bottomed cylindrical exhaust tube as a structure at the center of the case, and a plurality of openings are spaced apart at substantially equal intervals in the circumferential direction around the exhaust tube. Formed and these openings are covered by a filter. The first centrifugal separation unit mainly centrifuges the coarse dust by swirling the dust-containing air around the outer periphery of the exhaust pipe, and the dust-containing air from which the coarse dust has been separated flows into the exhaust pipe from each opening. And after passing through the filter, it is configured to be sucked into the second centrifugal separator.

JP 2012-65877 A

  In the configuration described in Patent Document 1, the bottom of the exhaust pipe has a circular flat shape. Therefore, the dust-containing air that flows from each opening and passes through the filter to the second centrifugal separator is unlikely to pass through the central portion of the bottom portion, and dust may accumulate in the central portion.

  The problem to be solved by the present invention is to provide a vacuum cleaner that suppresses the turbulent flow of dust-containing air inside the structure and makes it difficult to collect dust on the bottom surface of the structure.

  The vacuum cleaner of the embodiment has a main body case that houses an electric blower. The vacuum cleaner has a dust collecting device that is detachably provided on the main body case and separates and collects dust from the dust-containing air sucked by the operation of the electric blower. This dust collector has a case part and a structure located at the center of the case part, and the dust in the dust-containing air is swirled in the case part around the structure body. The 1st centrifuge part which isolate | separates is provided. In addition, the dust collecting device communicates with the first centrifugal separation unit and separates dust smaller than the dust separated by the first centrifugal separation unit in the dust-containing air that has passed through the first centrifugal separation unit. A centrifuge is provided. Furthermore, the structure includes a cylindrical structure body having an opening around which dust-containing air passes. In addition, the structure includes a separation filter that covers the opening. Further, the structure includes a bottom surface portion that has an inclined surface that closes an end portion of the structure body and is inclined from the peripheral side toward the central side toward the downstream side.

It is sectional drawing which shows the dust collector of the vacuum cleaner of one Embodiment. 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.

  Hereinafter, the configuration of an embodiment will be described with reference to FIGS. 1 to 3.

  In FIG. 3, 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.

  Further, as shown in FIGS. 1 to 3, 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, a fine dust, 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 portion 161 causes the fine dust separated by the second centrifuge units 93 to be below (directly below) the second centrifuge units 93 due to the inclination, in other words, the second centrifuge units 93. With respect to the center axis position, the position is shifted to the side 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 space portion is obtained by centrifuging 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, fine dust. It will drop to 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 portion 136 is spirally introduced into the inside along the tangential direction of the inner peripheral surface of the swirling tube portion 141 and swirled in the swirling tube portion 141. The centrifugally separated fine dust is dropped from the lower end portion through the wall 161 to the dust reservoir 165, and the fine dust is separated and the substantially dust-free air is sent from the exhaust portion 137 to the air passage portion 94. It is configured to exhaust the air. 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 (swivel cylinder part 141), the dust-containing air is swung along the inner peripheral surface (the inner peripheral surface of the rotary cylinder part 141), and fine dust in this dust-containing air is centrifuged. Then, it falls along the second centrifuge part 93 (inner peripheral surface of the swivel cylinder part 141), and is guided to the dust reservoir 165 by the wall part 161 and stored.

  The air substantially free of dust from which fine dust is 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 94 and guided backward, 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 accumulated in the dust reservoir 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 accumulated in the case portion 85, and this coarse dust. And mix.

  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. Coarse dust accumulated in a compressed state in the case portion 85 and fine dust mixed with the coarse dust are discarded together.

  According to the embodiment described above, the dust-containing air passes through the inner cylinder 91 located at the center of the case 85 of the first centrifugal separator 90 that separates dust (coarse dust) in the dust-containing air. A cylindrical exhaust tube portion 108 having an opening 111 around, a separation filter 112 that covers the opening 111, and an end portion of the exhaust tube portion 108 that is closed and inclined toward the downstream side from the peripheral side to the center side By providing the bottom surface portion 113 that is a surface, the dust-containing air that has flowed into the exhaust tube portion 108 from the opening 111 flows along the upper surface of the bottom surface portion 113 on the downstream side (second centrifugal separation portion 93 side). By rectifying (guiding) upward, the turbulent flow of dust-containing air inside the inner cylinder 91 (exhaust cylinder portion 108) can be suppressed. Accordingly, the dust-containing air is less likely to stay in the central portion of the bottom surface portion 113 and the like, and the dust is less likely to accumulate in the central portion of the bottom surface portion 113, and the dust separation performance is improved.

  In addition, the shade portion 109 that protrudes in the radial direction from the exhaust tube portion 108 is provided on the bottom surface portion 113 of the inner tube 91, so that the coarse dust separated by the first centrifugal separation portion 90 and accumulated in the lower portion of the case portion 85. However, it is possible to suppress the reverse flow upward due to the flow of the dust-containing air by the shade portion 109, and the separation performance of dust (coarse dust) is further improved.

  In particular, the shade portion 109 has a peripheral plate portion 116 that protrudes in the opposite direction to the exhaust tube portion 108, so that the coarse dust separated by the first centrifugal separation portion 90 and accumulated in the lower portion of the case portion 85 is shaded. Since it is housed inside the portion 109, it is more reliable that the coarse dust separated by the first centrifugal separation portion 90 and accumulated in the lower portion of the case portion 85 flows back upward due to the flow of the dust-containing air. Can be suppressed.

  Furthermore, since the center side of the shade part 109 is the back surface of the bottom face part 113 and protrudes to the downstream side, the storage volume of coarse dust in the shade part 109 can be increased, and the first centrifugal separation part A larger amount of dust separated in 90 can be stored inside the shade portion 109, and the bottom surface portion 113 of the inner cylinder 91 and the shade portion 109 can be formed of the same parts, and the number of parts can be reduced.

  In addition, since the bottom surface portion 113 is formed in a smooth curved surface and does not have a sharp portion, dust compressed inside the shade portion 109 is not clogged on the back side.

  Then, by forming the inner cylinder 91 including the shade portion 109 with a material containing at least carbon, it is possible to effectively release static electricity generated by friction with dust-containing air (dust) on the surface of the inner cylinder 91 and the like. This prevents static electricity (particularly fine dust) from sticking to the surface of the inner cylinder 91. Therefore, when discarding dust, it can be suppressed that dust (particularly fine dust) remains attached to the surface of the inner cylinder 91, and it becomes easier to discard dust.

  Further, a 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 is electrically connected to the second centrifuge portion 93. The dust collecting device 27 is mounted on the main body by providing a locking opening 153 that receives the locking claw 152 and a ground path 157 that is electrically connected to the locking claw 152 received in the locking opening 153. When attached to the case 26, the locking claw portion 152 inserted into the locking opening 153 is electrically connected to the ground path 157 via the terminal portion 156. Therefore, the inner cylinder 91 (shade portion 109) set to the same potential as that of the second centrifugal separation portion 93 can be reliably set to the ground potential via the locking claw portion 152 and the ground path 157, and the static electricity can be more reliably prevented. I can escape.

  Further, by providing the shade portion 109 with the compression opening 117 and the compression filter 118, the dust contained inside the shade portion 109 allows the dust-containing air to pass through the compression opening 117 (compression filter 118). Therefore, a large amount of coarse dust can be accumulated inside the shade portion 109, and it is possible to more reliably prevent the coarse dust from flowing upward due to the flow of the dust-containing air.

  In the above-described embodiment, if the bottom surface portion 113 has a shape having an inclined surface inclined toward the downstream side from the peripheral side to the central side, for example, a cross section having an inclined surface on the peripheral side and a flat central side. It is good also as shapes, such as trapezoid shape.

  Further, the electric vacuum cleaner 11 is not limited to the 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
91 Inner cylinder as a structure
93 Second centrifuge
108 Exhaust tube, the main body of the structure
109 Shade
111 opening
112 Separation filter
113 Inclined bottom surface
116 Circumferential plate as folded part

Claims (6)

A body case containing an electric blower;
A dust collecting device that is detachably provided in the main body case and separates and collects dust from the dust-containing air sucked in by the operation of the electric blower;
The dust collector is
A first case that separates dust in the dust-containing air by rotating the dust-containing air in the case portion around the structure body; A centrifuge,
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 structure is
A cylindrical structure body having an opening through which dust-containing air passes;
A separation filter covering the opening;
An electric vacuum cleaner comprising: a bottom surface portion having an inclined surface that closes an end of the structure body and is inclined from the peripheral side toward the central side toward the downstream side. The vacuum cleaner according to claim 1, wherein the structure includes a shade portion that is provided on the bottom surface portion and protrudes in a radial direction from the structure main body. The electric vacuum cleaner according to claim 2, wherein the shade portion includes a folded portion that protrudes in a direction opposite to the structure body. The electric vacuum cleaner according to claim 2 or 3, wherein the shade portion has a central side that is a back surface of the bottom surface portion and protrudes toward the downstream side. The electric vacuum cleaner according to any one of claims 2 to 4, wherein the shade portion is formed of a material containing at least carbon. The vacuum cleaner according to any one of claims 1 to 5, wherein the structure is made of a material containing at least carbon.

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