JP2011036447A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner reducing noise of high frequency without fluid loss. <P>SOLUTION: The vacuum cleaner includes an electric blower 28 and a dust collector 2 arranged to form a flow passage by means of an intake duct 27 disposed above the electric blower 28. A flat surface is provided on the intake duct 27 in a width direction of a cross-section of a flow passage. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vacuum cleaner.

  In an electric blower and a vacuum cleaner with a built-in dust collector, there is a problem that wind noise of the electric blower and noise due to turbulence of air flow propagate from the intake side of the electric blower and pass through the wall surface of the vacuum cleaner. Are known.

  As conventional techniques related to noise propagation reduction on the intake side, techniques described in Patent Document 1 and Patent Document 2 shown below are known.

  Patent Document 1 describes that an intake duct formed by a spiral-shaped air passage is installed on the intake side of an electric blower.

  Patent Document 2 describes that an intake air passage connecting the electric blower and the dust collecting chamber is formed of a sound absorbing material, and a partition plate that suppresses the turbulence of the air flow is installed at the upper portion of the suction opening of the electric blower. .

JP 50-61070 A Japanese Utility Model Publication No. 54-125176

  The vacuum cleaner sucks dust by the suction force of the air generated by the electric blower, and separates the dust and air by the dust collector. However, in the above-described conventional technology, there is a problem that the fluid resistance of the air passage is increased and the suction force is weakened by providing the spiral flow path and the partition plate. Furthermore, since the suction force becomes weak, in order to generate the same suction force, a larger electric input is required, which is not preferable from the viewpoint of energy saving.

  Therefore, an object of the present invention is to reduce noise from the intake side of an electric blower without reducing the suction force.

  In order to achieve the above object, a vacuum cleaner of the present invention has an electric blower, a dust collecting device upstream of the electric blower, and a connecting air passage that communicates the dust collecting device and the electric blower. The connection air passage has a substantially rectangular parallelepiped shape, and a first opening is provided on the first surface of the one surface, the first opening is connected to the dust collector, and the connection air passage is A second opening is provided on any surface other than the facing surface of the first opening, and the second opening is connected to the electric blower, and the first opening extends in a direction extending from the first opening to the facing surface. A second surface provided with two openings, a fourth surface projecting from the third surface facing the second surface toward the second surface, and the fourth surface and the third surface. It has a surface that is perpendicular to the second surface.

  In addition to the fourth surface, there are one or more surfaces that protrude from the third surface toward the second surface, and the second surface is connected to the third surface. You may have the surface which went straight to the surface.

  Furthermore, the connection air passage may have a plurality of spaces with different depths on the back side of the second opening in a direction extending from the first opening to the opposite side.

  Further, the space on the back side of the second opening in the direction extending from the first opening to the opposite side may be divided into a plurality of partitions.

  Alternatively, the vacuum cleaner of the present invention includes an electric blower and a dust collecting device upstream of the electric blower, and has a connecting air passage that communicates the dust collecting device and the electric blower. A substantially rectangular parallelepiped shape, the first opening of the first surface is provided with a first opening, the first opening is connected to the dust collector, and the connecting air passage is formed of the first opening. A second opening is provided on any surface other than the facing surface, the second opening is connected to an electric blower, and the connecting air passage extends in a direction extending from the first opening to the facing surface. A plurality of spaces having different depths are provided on the back side of the opening.

  According to the present invention, since the surface of the exhaust surface provided in the connection air passage has a surface that protrudes from the surface of the exhaust surface toward the exhaust surface, the suction force of the electric blower can be reduced without reducing the suction force. Therefore, it is possible to provide a vacuum cleaner that can reduce noise.

It is a cross-sectional view of the cleaner body of the embodiment of the present invention. (A) is a perspective view of the dust collector of the Example of this invention, (B) is a cross-sectional view of the dust collector of the Example of this invention. (A) is a perspective view of the inner cylinder and outer cylinder of the Example of this invention, (B) is a perspective view of the back side of the inner cylinder of the Example of this invention. (A) is a perspective view of the state which opened the front cover of the dust accommodating part of the Example of this invention, (B) is the perspective view of the state which opened the rear filter of the dust accommodating part of the Example of this invention. FIG. (A) is the front view which looked at the front cover of the dust accommodating part of the Example of this invention from the dust accommodating part outer side, (B) is dust accommodating the front cover of the dust accommodating part of the Example of this invention. It is the front view seen from the part inside. It is the front view seen from the dust separation part side when the dust accommodating part of the Example of this invention removes the front cover. It is a general-view figure of the vacuum cleaner of the Example of this invention. It is a plane sectional view of the cleaner body of the example of the present invention. It is a disassembled perspective view of the intake duct, exhaust duct, filter, and electric blower of the Example of this invention. It is a bottom view when seen from the exhaust port of the intake duct. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG.

  Examples 1 and 2 of the present invention will be described below.

  In FIG. 1, the cross-sectional view of the cleaner body of the Example of this invention is shown.

  FIG. 8 is a plan sectional view of the cleaner body of the embodiment of the present invention when the cleaner body 1 is cut with the dust collector 2 removed.

  Further, in this embodiment, when the vacuum cleaner main body 1 is placed horizontally as shown in FIG. 1, the direction having the main body inlet 21 is the front direction of the cleaner main body 1, and the direction having the main body exhaust port 30 is the main body of the cleaner. 1 is referred to as a longitudinal direction of the cleaner body 1 from the front direction to the rear direction of the cleaner body 1.

  Further, in this embodiment, when the cleaner body 1 is placed horizontally as shown in FIG. 1, the direction with the handle 16 is upward of the cleaner body 1, and the direction with the substrate 49 is downward of the cleaner body 1. And the height direction of the cleaner body 1 from the upper direction to the lower direction of the cleaner body 1.

  In this embodiment, as shown in FIG. 8, the direction of the wheel shafts (not shown) on both sides of the cleaner body 1 is referred to as the width direction.

  First, the structure of the cleaner body 1 will be described. The dust collector 2 swirls the sucked air and communicates with the dust separator 4 that separates the dust by a centrifugal separation action (cyclone method), and the dust separator 4 accommodates the dust separated by the dust separator 4. And a dust storage portion 5 to be provided. The dust separator 4 and the dust container 5 are arranged in the axial direction of the dust collector 2 and are connected and communicated with each other in the axial direction. That is, the dust separator 4 is disposed on the front side of the cleaner body 1, and the dust container 5 is disposed on the rear side of the cleaner body 1 with respect to the dust separator 4. The dust separator 4 and the dust container 5 are connected so that the user can easily separate the dust separator 4 and the dust container 5. A tubular main body inlet 21 is provided at the front end of the cleaner body 1. A part of the front end face in the axial direction of the dust separator 4 is open, and the opening is connected to the inlet pipe 3. Instead of the front end surface in the axial direction of the dust separator 4, the circumferential surface of the front end in the axial direction of the dust separator 4 may be connected to the inlet pipe 3.

  The dust separation unit 4 includes a hollow substantially cylindrical outer cylinder 6 and a hollow substantially cylindrical inner cylinder 7 enclosed in the outer cylinder 6 with a concentric axis with the outer cylinder 6. As shown in FIG. 3 (A), one axial end surface (front end surface) of the outer cylinder 6 is closed except for an opening connected to the inlet pipe 3, and the other axial end surface (rear side) of the outer cylinder 6 is closed. The end face is open. The outer cylinder 6 is preferably made of transparent or translucent plastic or resin so that dust accumulation can be seen by the user or a sensor provided outside the outer cylinder 6 can detect the accumulation of dust. One end face (front end face) in the axial direction of the inner cylinder 7 is closed, and the other end face (rear end face) in the axial direction of the inner cylinder 7 is open. As shown in FIG. 3A, a recessed portion 8 that is recessed inward in the axial direction of the inner cylinder 7 is formed at the center of the closed portion of one end surface in the axial direction of the inner cylinder 7. The inlet pipe 3 is opposed to the closed portion of one end surface in the axial direction of the inner cylinder 7, that is, the recessed portion 8. As shown in FIG. 3A, a part of the recessed portion 8 reaches the outer peripheral end of the inner cylinder 7. In order to reduce the pressure loss of air, it is preferable that the opening direction of the recessed part 8 is a downward direction. However, the opening direction of the recessed part 8 may be upward or lateral. As shown in FIG. 3A, at the outer peripheral end of the inner cylinder 7 of the recess 8, the recess 8 does not face straight in the radial direction of the inner cylinder 7 but is slightly inclined in the circumferential direction. As shown in FIG. 1, the depth of the recess 8 in the axial direction is about half of the axial length of the cylindrical portion of the inner cylinder 7. However, the axial depth of the recessed portion 8 may extend over substantially the entire axial length of the cylindrical portion of the inner cylinder 7. In this case, the opening of the recessed portion 8 is formed in a part of the circumferential surface of the inner cylinder 7 over almost the entire length of the cylindrical portion of the inner cylinder 7. Further, a guide tube 38 is connected to the outer peripheral end of the recess 8. The cross section of the guide tube 38 has a substantially quarter circle shape, is formed along the outer peripheral surface of the inner cylinder 7, and the outer peripheral surface of the inner cylinder 7 also forms part of the inner wall surface of the flow path. The guide tube 38 is formed on the outer peripheral surface of the inner cylinder 7 in the circumferential direction by about several centimeters. Therefore, the air that has flowed in the axial direction by the inlet pipe 3 is changed in the radial direction by the recessed portion 8 and further changed in the circumferential direction by the outer peripheral end portion of the inner cylinder 7 of the recessed portion 8. At 38, it can be changed in the circumferential direction. Moreover, it is preferable that the recessed part 8 does not have an unevenness | corrugation and is formed in a curved surface. Thereby, air can be sufficiently swirled while suppressing pressure loss. The guide tube 38 may not be provided. An outer extension 34 extending toward the outer cylinder 6 is formed on the outer periphery of the other axial end surface (rear end face) of the inner cylinder 7. That is, as shown in FIG. 3A, the other axial end surface (rear side end surface) of the inner cylinder 7 has an annular shape with the inner side of the inner cylinder 7 opened.

  As shown in FIG. 3A, a part of the outer extending portion 34 in the circumferential direction is open. With this opening, air outside the inner cylinder 7 can flow into the dust container 5. The inner cylinder 7 is made of an antibacterial metal (for example, silver, copper) or an antibacterial substance (for example, silver, copper) or a coated metal (for example, stainless steel) so as to suppress the growth of bacteria. Preferably it is configured. However, the inner cylinder 7 may be comprised with resin also including a cylindrical part. Then, as shown in FIG. 3A, the outer cylinder 34 is inserted in the axial direction from the other axial end surface of the outer cylinder 6, so that the outer peripheral end of the outer extension 34 comes into contact with the inner periphery of the outer cylinder 6. As a result, the other axial end surface of the outer cylinder 6 is closed. The outer cylinder 6 and the inner cylinder 7 are connected so that the user can easily separate the outer cylinder 6 and the inner cylinder 7. A plurality of through holes 33 are provided on the circumferential surface of the inner cylinder 7. The inner cylinder 7 has a filter function by the plurality of through holes 33. The through-hole 33 allows air to flow from the outer side of the inner cylinder 7 to the inner side of the inner cylinder 7 without large dust flowing into the inner cylinder 7. Although it depends on the suction force, garbage having a weight of 1 yen or more cannot be sucked up in the outer cylinder 6 and may remain in the outer cylinder 6. By connecting the outer cylinder 6 and the inner cylinder 7 so that the user can easily separate the outer cylinder 6 and the inner cylinder 7, the user can easily separate the outer cylinder 6 and the inner cylinder 7 from each other. The dust accumulated in the outer cylinder 6 can be easily discharged, and the hair and lint caught in the through hole 33 of the inner cylinder 7 can be easily removed.

  In order to keep the airtightness of the connecting portion between the dust separator 4 and the dust container 5, a packing 9 is provided on the other axial end surface of the inner cylinder 7. The packing 9 is not only provided on the outer extension 34, but also projects in the axial direction of the inner cylinder 7. Therefore, the inside of the inner cylinder 7 is not completely hollow, and a partially closed space exists due to the packing 9. Further, a recessed portion 39 that is recessed inward in the axial direction of the inner cylinder 7 is formed in a portion of the packing 9 that protrudes to the inner side of the inner cylinder 7. The recess 39 has a handle function. Thereby, the user can hold the dust separation part 4 or the inner cylinder 7 by inserting a finger into the recess 39. A part of the upper side of the extended portion 34 is open and communicates with the outer flow path 35 of the front lid 11. That is, the inside of the outer cylinder 6 and the outside of the cylindrical portion of the inner cylinder 7 communicates with the outer flow path 35 of the front lid 11. As shown in FIG. 3 (A), the circumferential wall surface of the opening on the upper side of the extended portion 34 has a high wall surface on the side facing the opening of the guide tube 38 in the circumferential direction. The wall surface on the opening side of the guide tube 38 is preferably low. For example, assuming that the opening direction of the guide tube 38 is the counterclockwise direction when the dust separation unit 4 is viewed from the front, the left wall surface is high among the circumferential wall surfaces of a part of the upper opening of the extension portion 34, The wall on the right side is low. That is, since a part of the upper side of the extended portion 34 is opened, the circumferential direction of the extended portion 34 is less than one round of the outer periphery of the inner cylinder 7 but is shifted in a spiral shape. Therefore, the swirling flow outside the inner cylinder 7 can collide with the wall surface in the circumferential direction of a part of the opening on the upper side of the extended portion 34 and can smoothly change the direction in the axial direction. Also easily flows to the dust container 5. On the other hand, the inner side of the inner cylinder 7 communicates with the inner flow path 36 of the front lid 11.

  The dust container 5 is provided with a hollow case 10 having an axially one end face (front end face) and an axially other end face (rear end face) that are substantially inverted triangular in cross section. One end surface in the axial direction of the case 10 is closed by a front lid 11 that can be opened and closed. A shaft 31 is provided at the lower end of the front lid 11, and the shaft 31 is supported by the lower end of the case 10. The front lid 11 can be rotated back and forth in the axial direction of the case 10 with the shaft 31 as a fulcrum. A claw projects from the upper end portion of the front lid 11 on the case 10 side. On the other hand, a button 17 (which may be a lever) that can be pressed by the user is provided on the upper front side of the case 10, and a transmission rod (rod) 18 extending to the front side of the case 10 is connected to the button 17. One end of the transmission rod 18 is connected to the button 17, and the other end of the transmission rod 18 is formed in a claw shape. The claw at the other end of the transmission rod 18 can be engaged with the claw at the upper end of the front lid 11. When the front lid 11 is closed to the case 10, it is possible to prevent the front lid 11 from being opened by engaging the claw at the other end of the transmission rod 18 and the claw at the upper end of the front lid 11. When the user presses the button 17, the transmission rod 18 slides forward (may rotate upward), and the engagement between the other end of the transmission rod 18 and the upper end of the front lid 11 is engaged. The combination is released and the front lid 11 can be opened from the case 10 by gravity. While the handle 16 is formed in a horizontal direction, the normal direction of one end surface in the axial direction of the case 10 (corresponding to the front lid 11 portion) is inclined by 45 ° to 50 ° with respect to the horizontal direction. That is, when the user holds the handle 16 and lifts the dust container 5, one end surface in the axial direction of the case 10 (corresponding to the front lid 11 portion) faces downward (the direction of gravity action). Therefore, the front lid 11 can be opened from the case 10 by gravity. As will be described later, if the dust collection basket (dust collection container) 12 is urged by a spring (elastic body) to jump out to the front side of the case 10, the dust collection basket 12 pushes the rear surface of the front lid 11. Therefore, when the user presses the button 17, the front lid 11 can be smoothly opened from the case 10 by the pressing force of the dust collecting basket 12.

  The other axial end surface of the case 10 is closed by a filter 15 that can be opened and closed. A shaft 32 is provided at the lower end of the filter 15, and the shaft 32 is supported by the lower end of the case 10. The filter 15 can be rotated back and forth in the axial direction of the case 10 with the shaft 32 as a fulcrum. The filter 15 is formed with a filter member folded in a pleat shape within a frame body having a substantially square cross-sectional shape. As shown in FIG. 4B, the wave direction of the filter member is preferably the height direction (gravity acting direction). The filter 15 is, for example, a high-density HEPA filter (High Efficiency Particulate Air Filter). A HEPA filter is an air filter having a particle collection rate of 99.97% or more with respect to particles having a rated air volume of 0.3 μm and an initial pressure loss of 245 Pa or less. A packing 25 may be provided on the surface of the filter 15 opposite to the case 10. The packing 25 can maintain airtightness between the other axial end surface of the dust container 5 and the cleaner body 1 (particularly, the inlet of the intake duct 27). The shaft 31 and the shaft 32 may be shared. Further, the shaft 32 may be provided not at the lower end portion of the filter 15 but at the upper end portion of the filter 15.

  A dust collecting basket 12 is enclosed in the case 10. The shape of the dust collecting basket 12 may be a cage shape, a box shape or a container shape with one surface opened, or a dustpan shape. That is, the dust collecting basket 12 has a shape recessed on the opposite side to the opening. The cross-sectional shape of the dust collecting basket 12 may be a substantially square shape, a substantially circular shape, or a substantially triangular shape. The cross-sectional shape of the dust collecting basket 12 is preferably smaller from the opening surface toward the bottom surface. As a result, the cross-sectional area increases toward the side (opening side) where the dust is discharged, so that the user can easily discharge the dust accumulated in the dust collecting basket 12. The shape of the dust collecting basket 12 is formed by a frame body (support frame). It is preferable that a mesh member made of metal, nylon, or the like is coated or adhered to the bottom surface other than the opening surface of the dust collecting basket 12 and the top, bottom, left, and right surfaces. By providing not only the bottom surface of the dust collecting basket 12 but also the top, bottom, left, and right surfaces, air flow can be secured even if dust accumulates on the bottom surface of the dust collecting basket 12, and the pressure loss of the suction air Can be reduced, and a decrease in suction force can be suppressed. This mesh member is air permeable and has a filter function of collecting dust. A disposable tissue paper may be used instead of the mesh member, or a mesh member and a tissue paper may be combined as long as they are breathable and have a filter function for collecting dust. For example, the user may wear tissue paper on the mesh member. The opening surface of the dust collecting basket 12 coincides with the opening surface of one end surface (front end surface) in the axial direction of the case 10. That is, the opening direction of the dust collecting basket 12 and the opening direction of the one end surface in the axial direction of the case 10 are the same. As shown in FIG. 6, the upper half of the outer peripheral end of the opening surface of the dust collecting basket 12 abuts on the inner peripheral surface of one end surface in the axial direction of the case 10, and the outer peripheral end of the opening surface of the dust collecting basket 12. The lower half is not in contact with the inner peripheral surface of one end surface of the case 10 in the axial direction. The dust collecting basket 12 has a shaft 14 at the bottom. The shaft 14 is supported in the case 10. Therefore, the dust collecting basket 12 can be rotated back and forth in the axial direction of the case 10 with the lower shaft 14 as a fulcrum. Thereby, when the front lid 11 is opened from the dust container 5, a part of the dust collecting basket 12 can be ejected from the dust container 5 by gravity. Since the formation position of the shaft 14 with respect to the case 10 is on the same side (lower side) as the formation position of the shaft 31 with respect to the case 10, the front cover 11 is obstructed when the front cover 11 is opened from the dust container 5. A part of the dust collecting basket 12 can be ejected from the dust container 5 without any trouble. Further, the shaft 14 may be provided with a helical spring in which an elastic force acts in a direction in which the dust collecting basket 12 is pushed out to the front lid 11 side. As a result, when the front lid 11 is opened from the dust container 5, a part of the dust collection basket 12 can jump out of the dust container 5 vigorously by the elastic force of the spring. The dust accumulated in 12 can be easily discharged. Further, the dust collecting basket 12 is divided into two parts in the vertical direction, that is, it is preferably composed of two structures, that is, an upper half frame (support) and a lower half frame (support). The two divided dust collecting baskets 12 are connected by a shaft 13 formed outside the bottom surface of the dust collecting basket 12. Therefore, as shown in FIG. 4 (A), the dust collecting basket 12 has the opening surface of the dust collecting basket 12 split vertically, with the middle of the bottom as a fulcrum. In particular, when a part of the dust collection basket 12 jumps out of the dust container 5, the dust collection basket 12 breaks up and down. As a result, the user can more easily discharge the dust accumulated in the dust collecting basket 12. In particular, dust stuck to the inner surface of the dust collecting basket 12 can be easily removed. However, the upper and lower divided configuration of the dust collecting basket 12 is not essential. In addition, as described above, the front side of the case 10 is inclined by 40 ° to 45 ° with respect to the direction of gravity action, and the dust collection basket 12 jumps out of the dust storage portion 5 by 30 °, so that the dust collection basket 12 Dust accumulated inside can be discharged in the direction of gravity.

  An outer channel 35 and an inner channel 36 penetrating in the axial direction are formed in the front lid 11. The outer flow path 35 is formed on the upper side of the front lid 11, and one end of the outer flow path 35 communicates with the opening of the extended part 34, particularly between the outer cylinder 6 and the inner cylinder 7 of the dust separation part 4. The other end of the outer flow path 35 communicates with the opening of the dust collecting basket 12 in the case 10. In order to prevent the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separation part 4 when the vacuum cleaner is stopped, the other end of the outer flow path 35 is the opening of the dust collecting basket 12. Of these, it is preferable to communicate with the upper half or near the upper end. However, the other end of the outer flow path 35 may communicate with the central portion of the opening of the dust collecting basket 12. Furthermore, in order to prevent the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separator 4 when the vacuum cleaner is stopped, A check valve (not shown) that covers the flow path 35 is preferably formed. The check valve rotates to the dust collecting basket 12 with the upper end as a fulcrum. However, the check valve is not an essential configuration. The cross-sectional area of the outer flow path 35 increases from one end of the outer flow path 35 toward the other end. The formation direction of the outer flow path 35 is a direction from the outer side of the front lid 11 toward the center side from one end of the outer flow path 35 to the other end. That is, the direction is from the outside of the dust collecting basket 12 toward the center side. In order to suppress the turbulence of the air flowing into the dust collecting basket 12 from the outer flow path 35, the outer flow path 35 is formed in the direction of the wall surface (upper wall surface) on the side where the outer flow path 35 of the dust collecting basket 12 communicates. Is preferred. The inner flow path 36 is formed from the center of the front lid 11 to the lower side, and one end of the inner flow path 36 communicates with the other end opening in the axial direction of the inner cylinder 7 (inside the inner cylinder 7) of the dust separator 4; The other end of the inner flow path 36 communicates with the case 10, particularly with the outside of the dust collecting basket 12. The other end of the inner flow path 36 is preferably in communication with the lower outside of the dust collecting basket 12. The inner flow path 36 is formed avoiding the outer flow path 35. Contrary to the outer flow path 35, the cross-sectional area of the inner flow path 36 is reduced from one end of the inner flow path 36 toward the other end.

  A handle 16 that extends in the horizontal direction and can be gripped by the user is provided on the outer side of the upper portion of the dust container 5. The user can hold the handle 16, lift the dust container 5 upward, and remove only the dust container 5 from the cleaner body 1 while leaving the dust separator 4 in the cleaner body 1. In addition, if the dust separation part 4 and the dust storage part 5 are connected, if the user holds the handle 16 and lifts the dust storage part 5 upward, the dust separation part 4 and the dust storage part 5 will be described. And, that is, the dust collector 2 itself can be removed from the cleaner body 1. As shown in FIG. 1, the axial direction other end surface (corresponding to the filter 15 portion) of the dust container 5 is preferably inclined toward the case 10 than the vertical surface (gravity acting direction). That is, it is preferable that the lower part is closer to the case 10 side than the upper part of the other axial end surface of the dust container 5. Moreover, as shown in FIG. 1, the formation direction of the axial direction one end surface (equivalent to front cover 11 part) of the dust accommodating part 5 is about 40 to 45 degrees on the case 10 side from the vertical surface (gravity acting direction). Inclined. That is, the lower part is closer to the case 10 side than the upper part of the one axial end surface of the dust container 5. As a result, the one end surface in the axial direction and the other end surface in the axial direction of the dust container 5 have an inverted C shape with respect to the vertical surface (gravity acting direction). Thereby, when a user lifts the dust accommodating part 5 upward, it becomes less caught, and the user can easily remove the dust accommodating part 5 from the cleaner body 1. Then, the user can easily remove the dust separator 4 from the cleaner body 1 by holding the recess 39 and lifting the dust separator 4 upward or obliquely upward after removing the dust container 5. As shown in FIG. 1, it is preferable that the axial direction other end surface (corresponding to the inlet pipe 3 portion) of the dust separation portion 4 is inclined toward the outer cylinder 6 side than the vertical surface (gravity acting direction). That is, it is preferable that the lower part is closer to the outer cylinder 6 side than the upper part of the other axial end surface of the dust separator 4. As a result, when the user lifts the dust separator 4 upward or obliquely upward, there is less catching, and the user can easily remove the dust separator 4 from the cleaner body 1. Further, not only when the user removes the dust separator 4, but also when the dust separator 4 and the dust container 5 are integrated, that is, when the dust collector 2 itself is removed from the cleaner body 1. Since the one end surface in the axial direction and the other end surface in the axial direction have an inverted C shape with respect to the vertical surface (the direction of gravity action), the user is less likely to be caught when lifting the dust collector 2 upward. Can easily remove the dust collector 2 from the cleaner body 1.

  A hose joint pipe 20 is inserted into the main body inlet 21 and can hold the hose joint pipe 20. A packing 22 is provided at one end of the main body inlet 21. Thereby, the airtightness of the hose joint pipe 20 and the inlet pipe 3 can be maintained. A caster support portion 23 for supporting casters is provided at the front lower end of the vacuum cleaner body 1 (below the dust collector 2). An intake duct 27 extending in the front-rear direction of the cleaner body 1 is provided on the upper rear side in the cleaner body 1. An opening 27 a at one end in the extending direction of the intake duct 27 faces the filter 15. An auxiliary filter 26 is provided near the opening 27 a at one end of the intake duct 27. Thereby, it is possible to suppress the electric blower 28 from sucking the dust remaining outside the dust collector 2. The other end in the extending direction of the intake duct 27 is closed, and the lower portion in the vicinity of the other end in the extending direction of the intake duct 27, that is, the electric blower 28 side is opened as a discharge port 27 b of the intake duct 27. A dust removing device 24 that removes dust adhering to the filter 15 is provided at a position in contact with the filter 15 at an upper portion of the opening 27 a at one end of the intake duct 27 of the cleaner body 1. The dust removing device 24 includes a spiral spring (elastic body) on the outer periphery of the rotating body. The dust removing device 24 is rotated by a motor or by pulling out a cord 47 provided around the cord reel 41, and a spiral spring bounces the filter member of the filter 15, so that dust attached to the filter 15 is shaken off. As described above, since the wave direction of the filter 15 is in the height direction, the dust that has been shaken off easily falls in the direction of gravity. The dust shaken off from the filter 15 accumulates in the case 10. Accordingly, clogging of the filter 15 can be suppressed, a decrease in air pressure loss can be suppressed, and a decrease in suction force can be suppressed.

  As shown in FIG. 1, an electric blower 28 that generates a suction force is provided on the lower rear side in the cleaner body 1. The electric blower 28 is installed in a vertical position with the suction port 28a of the electric blower 28 facing upward. The electric blower 28 is longest from the surface of the suction port 28a to the surface opposite to the surface of the suction port 28a. Therefore, the length of the vacuum cleaner main body 1 from the hose joint pipe 20 to the main body exhaust port 30 can be shortened by installing the electric blower 28 vertically so that the suction port 28a of the electric blower 28 faces upward. . An intake duct 27 is provided in the upper part of the electric blower 28 in the cleaner main body 1, and the suction port 28 a of the electric blower 28 and the discharge port 27 b of the intake duct 27 are connected to each other. In the present embodiment, when the electric blower 28 is installed in the cleaner body 1, the electric blower 28 is installed so as to have the suction port 28 a at the upper part and the exhaust port 28 b on the side of the electric blower 28. In the cleaner body 1, an exhaust duct 40 communicating with the exhaust port 28 b of the electric blower 28 is provided downstream of the electric blower 28 and in front of the electric blower 28. Further, a filter 29 communicating with the exhaust duct 40 is provided in the cleaner body 1 on the downstream side of the exhaust duct 40 and on the front side of the exhaust duct 40. The exhaust duct 40 and the filter 29 are fixed by fixing means such as screws. This is because the exhaust duct 40 and the filter 29 are fixed so that the airtightness between the exhaust duct 40 and the filter 29 can be maintained, and all the exhaust gas emitted from the exhaust port 28b of the electric blower 28 can pass through the filter 29. It is to do. The filter 29 is formed with a filter member folded in a pleat shape in a frame body having a substantially square cross section. The wave direction of the filter member is preferably the height direction (gravity acting direction). The filter 29 is, for example, a high-density ULPA filter (Ultra Low Penetration Air Filter). The ULPA filter is an air filter having a particle collection rate of 99.9995% or more for particles having a rated air volume of 0.15 μm and an initial pressure loss of 245 Pa or less. The particle collection efficiency is higher than the particle collection efficiency. And the main body exhaust port 30 is provided in the rear-end surface of the cleaner body 1. FIG.

  As shown in FIG. 8, the cord 47 has a plug 43 at the tip. Electricity is obtained by inserting the plug 43 into an outlet in a room or the like. When using a vacuum cleaner other than the rechargeable vacuum cleaner, the electric blower 28 and the like cannot be operated unless the plug 43 is inserted into an outlet. Therefore, it is preferable to provide the cord reel 41 in a place where it does not get in the way when using the electric vacuum cleaner. Hereinafter, a place where the cord reel 41 is provided is referred to as a cord reel chamber 42. When the cord reel chamber 42 is provided in the front portion of the cleaner body 1 so that the plug 43 and the cord 47 come out from the front portion of the cleaner body 1, the plug 43 and the cord 47 come out in the traveling direction, so that cleaning is performed. Difficult to handle. Even when the cord reel chamber 42 is provided on the side surface or upper surface of the cleaner body 1 so that the plug 43 or the cord 47 comes out from the side surface or upper surface of the cleaner body 1, it is difficult to handle when cleaning. By providing the cord reel chamber 42 at the rear part of the cleaner main body 1 so that the plug 43 and the cord 47 come out from the rear end surface of the cleaner main body 1, it becomes easy to handle without disturbing the moving direction or the direction change. In the present embodiment, the electric blower 28 and the cord reel chamber 42 are provided adjacent to each other in the cleaner body 1. In addition, the electric blower 28 and the cord reel chamber 42 are provided behind the dust collector 2 in the cleaner main body 1. As shown in FIG. 20, in this embodiment, the length of the cord reel chamber 42 in the vertical direction is longer than the length of the electric blower 28 in the vertical direction, and is longer than the length in the vertical direction of the electric blower 28 and the exhaust duct 40. Also short.

  FIG. 9 is an exploded perspective view of the intake duct, the exhaust duct, the filter, and the electric blower according to the embodiment of the present invention. FIG. 10 is a bottom view when viewed from the exhaust port of the intake duct 27. The intake duct 27 is installed on the upper side of the electric blower 28 via the packing 19. The packing 19 has an annular shape, and maintains tightness with the electric blower 28 by being in close contact with the upper surface and the side surface of the electric blower 28, and the annular rib 62 provided on the lower side of the intake duct 27. The electric blower 28 and the air intake duct 27 are kept airtight by contacting and supporting.

  The shape of the annular rib 62 is a shape having a double annular ring protruding from the packing 19. The annular rib 62 not only has the effect of maintaining airtightness, but also has the effect of reducing the amount of vibration transmitted by the electric blower 28 because the contact area with the packing 19 can be reduced.

  A packing presser 63 is provided on the rear side of the intake duct 27. The packing presser 63 is installed so as not to contact the outer peripheral surface of the packing 19 circumferential side portion. Since the vacuum cleaner is used by moving together with the worker, there is a risk that the electric blower 28 may fall off due to an impact force that the vacuum cleaner body 1 collides with furniture or the like or falls from the stairs or the like. There is. In the present embodiment, the packing presser 63 holds the electric blower 28 when an impact force that causes the electric blower 28 to drop off is applied, thereby preventing the electric blower 28 from falling off.

  The electric blower 28 is vibrated by rotation. The vibration of the electric blower 28 is transmitted to the cleaner main body 1, and the surface of the cleaner main body 1 is shaken to increase noise. Therefore, it is preferable to adopt a structure in which the vibration of the electric blower 28 is not transmitted to other than the electric blower 28 as much as possible.

  In this embodiment, the packing presser 63 and the packing 19 are not in contact with each other. For this reason, the vibration from the electric blower 28 to the intake duct 27 is transmitted only from the annular rib 62 via the packing 19, so that the contact area can be reduced and the transmission of vibration can be reduced.

  In the present embodiment, the annular rib 62 is constituted by double ribs having the same height, but may not be double or the same height. If the ribs of the annular rib 62 have different heights, the packing 19 is supported by the higher annular rib 62 during normal use, and the lower annular rib 62 supports when a load is applied. Since the contact area with the annular rib 62 can be reduced, the amount of vibration transmitted can be further reduced.

  The intake duct 27 connects the opening 27 a to the dust collector 2 and the discharge port 27 b to the electric blower 28, and guides the suction air from the dust collector 2 by the suction force generated by the electric blower 28. In the present embodiment, the suction port 28a of the electric blower 28 faces upward. Therefore, the intake duct 27 deflects the suction air from the dust collector 2 and guides it to the suction port 28a.

  11 is a cross-sectional view taken along line AA in FIG. 12 is a cross-sectional view taken along the line BB in FIG. The intake duct 27 has an opening 27 a connected to the dust collector 2 and a discharge port 27 b connected to the suction port 28 a of the electric blower 28. The intake duct 27 has a flat surface 60 on the surface facing the discharge port 27b, and the flat surface 60 extends from the opening 27a to the opposite surface. The intake duct 27 shown in the present embodiment is inclined on the surface facing the discharge port 27b so that the cross-sectional area of the flow path decreases in the direction extending from the opening 27a to the opposite side, but has the discharge port 27b. The surface and the surface facing the discharge port 27b may be parallel.

  The intake duct 27 divides the width D direction into widths d1 and d2 by a plane 60 in a direction extending from the opening 27a to the opposite side, and has a height H1 at the width d1 and a height H2 at the width d2. The ratio between the width d1 and the height H1 and the ratio between the width d2 and the height H2 are close to 1. The intake duct 27 shown in the present embodiment has a shape in which the width d1 is narrow and the width d2 is wide in the direction extending from the opening 27a to the opposite side. In addition, since the intake duct 27 has a width D that is approximately twice the height H, one plane 60 is provided in the width D direction, but two or more planes 60 may be used.

  For example, when the width D is about three times the height H, by providing two or more planes 60, the ratio of the width and the height of the region partitioned by the plane 60 can be close to 1. it can.

  In the intake duct 27 shown in the present embodiment, the opposed surface of the discharge port 27b and the flat surface 60 are connected by a curved surface, but they may not be connected by a curved surface.

  The intake duct 27 includes a space 64 on the side away from the opening 27a of the discharge port 27b extending in the direction facing the opening 27a. A part of the space 64 of the intake duct 27 shown in the present embodiment is a curved surface, but the space may be a flat surface.

  In addition, the intake duct 27 has a partition plate 61 extending in a direction extending from the opening 27a to the facing direction, the space 64 extending in a direction perpendicular to the surface having the discharge port 27b and extending from the opening 27a to the facing direction. In the intake duct 27 shown in the present embodiment, the partition plate 61 that divides the space 64 is divided at a position where the width d3 is narrower than the width d4 in the direction extending from the opening 27a to the opposite side, but the width d3 is the width d4. It may be divided at a wider position.

  13 is a cross-sectional view taken along the line CC of FIG. The space 64 has a depth L1 space and a depth L2 space in a direction extending from the opening 27a to the opposite side. In the intake duct 27 shown in the present embodiment, the depth L1 is shorter than the depth L2, but the depth L1 may be longer than the depth L2.

  Hereinafter, the air propagation sound generated in the electric blower 28 will be described.

The electric blower 28 rotates an impeller by electromagnetic force between a rotor (not shown) and a stator, and generates a differential pressure before and after the impeller by movement of the impeller to generate a suction force. In the vacuum cleaner main body 1 as in the present embodiment, the number of rotations of the built-in electric blower 28 is as fast as 30000 revolutions per minute when no load is applied, and the air volume is as high as 2 m ³ / min. Since the space inside the electric blower 28 is narrow, the suction air guided to the electric blower 28 becomes a locally high-speed turbulent flow and generates turbulent noise.

  Moreover, the impeller of the electric blower 28 drives the fluid by generating a pressure difference on the surface of the blade. At that time, the rotating impeller has a pressure difference between the front surface and the rear surface of the blade with respect to the rotation direction. The impeller inside the electric blower 28 of the present embodiment is a centrifugal impeller in which the blades are retracted with respect to the rotation direction. When the impeller rotates, the front surface of each blade with respect to the rotation direction is on the rear surface. The pressure is high compared. A stationary blade for recovering the dynamic pressure to a static pressure is installed downstream of the impeller. The blades of the rotating impeller have a pressure difference between the front and rear, and in order to fluctuate the pressure upstream of the stationary blade, the blade sound has a frequency that is an integral multiple of the product of the number of impeller blades and the rotational speed. Occurs.

  These turbulent noise and blade noise propagate from the exhaust port 28b and the suction port 28a of the electric blower 28 and are transmitted to the outside of the electric blower 28.

  The noise propagating from the exhaust port 28 b of the electric blower 28 is transmitted from the main body exhaust port 30 after being silenced by the sound insulation by the exhaust duct 40, changes in the cross-sectional area, and the bent flow path after passing through the filter 29.

  In addition, the noise propagating from the suction port 28a of the electric blower 28 propagates through the intake duct 27 and is silenced, reaches the dust collecting device 2, passes through the wall surface of the cleaner body 1, and is radiated from the surface of the cleaner body 1. 7 and the dust collector 2 radiate from the suction tool 50 via the hose 54 and the joint pipe 51 shown in FIG.

  Hereinafter, the silencing effect of the intake duct 27 will be described.

  In the intake duct 27, an intake air passage parallel to the discharge port 27b and a flow path connecting the discharge port 27b and the suction port 28a of the electric blower 28 form a substantially right angle. In addition, a space 64 is provided on the side away from the opening 27a of the discharge port 27b extending in the direction facing the opening 27a. For this reason, the sound wave has a silencing effect by the interference action.

  When using the silencing effect due to this interference, the maximum frequency that can be silenced is determined by the length of the long side of the flow path, so the ratio of the long side to the short side (aspect ratio) of the cross section of the flow path is higher when it is closer to 1. Can be muted up to.

  The plane 60 shown in the present embodiment divides the width D direction into widths d1 and d2, and the ratio of the width d1 to the height H1 and the width d2 to the height H2 is close to 1. Since the intake duct 27 has a change in impedance on the plane 60 in the width D direction, the channel cross section can be divided into a shape having an apparent aspect ratio close to 1 by the plane 60. Therefore, it is possible to mute to a higher frequency.

  The space 64 of the intake duct 27 is divided by the widths d3 and d4, respectively, which is also because the noise reduction effect due to interference is applied to a high frequency by making the ratio of the height H and d3 and d4 close to 1.

  The spaces 64 divided by the partition plates 61 with the widths d3 and d4 have depths L1 and L2, respectively. By setting the lengths of L1 and L2 to 1/4 of the wavelength of the sound wave to be silenced, The space 64 becomes a 1/4 wavelength tube, and the sound wave that has entered the space 64 and the reflected sound wave are shifted in phase by 1/2 wavelength, so that they can cancel each other and mute.

  Therefore, it is possible to selectively mute a specific sound wave such as a blade sound.

  Further, the partition plate 61 of the intake duct 27 shown in the present embodiment extends from the facing of the opening 27a to the circumference of the discharge port 27b. This is to prevent the suction air entering the discharge port 27b from entering the space 64 from the discharge port 27b and becoming a turbulent flow. The partition plate 61 may be installed so as to straddle the discharge port 27b.

  FIG. 2A shows a perspective view of the dust collector of the embodiment of the present invention, and FIG. 2B shows a cross-sectional view of the dust collector of the embodiment of the present invention. The user can remove the dust collector 2 from the cleaner body 1 by holding the handle 16 and lifting the dust collector 2 upward. However, the dust separator 4 may be left in the cleaner body 1 and only the dust container 5 may be removed from the cleaner body 1. As shown in FIG. 2A, the outer shape of the cross section of the dust separation portion 4 viewed from the axial direction is a substantially circular shape. The outer shape of the cross section of the dust container 5 is substantially circular at the front lid 11, but is substantially square after the front lid 11, and is also substantially square at the filter 15.

  As shown in FIG. 2B, the opening direction at one axial end of the case 10 and the opening direction at the other axial end of the case 10 are not in a straight line and differ by about 45 ° to 50 °. That is, the axial direction of the dust container 5 is bent slightly forward from the middle. As described above, one end surface in the axial direction of the dust collector 2 (portion of the inlet pipe 3) faces slightly downward (the direction of gravity action), and the other end surface in the axial direction of the dust collector 2 (portion of the filter 15) is also , Slightly facing downward (gravity acting direction), one end surface in the axial direction and the other end surface in the axial direction of the dust collector 2 have an inverted C shape with respect to the vertical surface (gravity acting direction). Therefore, when the dust collector 2 is lifted upward, the amount of catch is reduced, and the user can easily remove the dust collector 2 from the cleaner body 1.

  FIG. 3A shows a perspective view of the inner cylinder and the outer cylinder of the embodiment of the present invention, and FIG. 3B shows a perspective view of the back side of the inner cylinder of the embodiment of the present invention. One end surface of the outer cylinder 6 is closed except for a portion where the inlet pipe 3 is formed, and the other end surface of the outer cylinder 6 is opened. The inner cylinder 7 has an annular extending portion 34 at one end of the cylindrical portion. As shown in FIG. 3A, the outer peripheral end of the other end surface of the outer cylinder 6 abuts on the outer peripheral end of the outer extension part 34 by being inserted into the outer cylinder 6 from the cylindrical portion of the inner cylinder 7 in the axial direction. Thus, the inner cylinder 7 is formed in the outer cylinder 6. As shown in FIG. 3A, the opening direction of the inlet pipe 3 and the opening of the recessed portion 8 are opposed to each other. The opening direction of the recess 8 toward the outer peripheral end of the inner cylinder 7 is substantially downward, and the opening direction of the guide tube 38 in the circumferential direction is counterclockwise. The circumferential opening direction of the guide tube 38 may be clockwise. And the hole penetrated to an axial direction is provided in the upper part of the outward extension part 34, ie, the upper part of the outward extension part 34 is opening. The left wall surface of the opening is higher than the right wall surface. That is, the wall surface (left wall surface) of the upper opening of the extension part 34 facing the opening direction in the circumferential direction of the guide tube 38 is higher than the other wall surface (right wall surface). The surface of the extended portion 34 is spiral, and has a function of a flow path that smoothly guides air to the opening above the extended portion 34. As shown in FIG. 3 (B), the upper substantially semicircular portion in the inner cylinder 7 is provided with a recessed portion 39 that is recessed toward the inner side of the inner cylinder 7, and the lower substantially semicircular portion is formed in the inner cylinder 7. Open in. When the flow rate of air outside the inner cylinder 7 is made larger than the flow rate of air inside the inner cylinder 7 in a state where dust is not accumulated in the dust collecting basket 12, the upper portion of the extended portion 34 is higher than the opening area inside the inner cylinder 7. The opening area may be increased. The area of the recessed portion 39 may be increased as compared with the opening into the inner cylinder 7, or the area of the opening into the inner cylinder 7 may be increased as compared with the recessed portion 39. Then, the user can easily hold the dust separation part 4 or the inner cylinder 7 by putting his / her finger into the recess 39.

  When the cylindrical portion of the inner cylinder 7 is formed of a metal material having an antibacterial effect, first, a plurality of through-holes 33 having a diameter of about 0.1 mm to 0.4 mm are etched into a thin metal plate, and then both ends are formed. Join into a cylindrical shape. The through hole 33 may be punched. Examples of the metal material having an antibacterial effect include stainless steel, silver, and copper. The alloy is not limited to stainless steel, silver and copper, and may be any alloy containing silver or copper or having silver or copper surface-deposited. The thickness of the metal thin plate is 1 mm or less, and about 0.1 mm to 0.5 mm is preferable for improving workability. When the metal thin plate is thin, it is preferable to fix both ends in the axial direction of the cylindrical metal thin plate with a resin having good formability in order to improve the strength and the roundness. Specifically, a substantially circular one-end mold of the inner cylinder 7 having the recessed portion 8 and the guide tube 38 and a mold of the other end of the inner cylinder 7 having the annular outer extension 34 are formed into a molded mold. Then, a cylindrical metal thin plate is set, and then insert molding is performed by pouring resin into a mold. In the case of insert molding, the metal thin plate may not be formed into a cylindrical shape by joining both ends. Thus, only the cylindrical portion of the inner cylinder 7 in which the substantially circular one end portion of the inner cylinder 7 having the recessed portion 8 and the guide tube 38 and the other end portion of the inner cylinder 7 having the annular outer extending portion 34 are made of resin. Can be made of a metal material. Insert molding can simplify the manufacturing process.

  FIG. 4 (A) shows a perspective view of a state where the front cover of the dust container of the embodiment of the present invention is opened, and FIG. 4 (B) shows the rear filter of the dust container of the embodiment of the present invention opened. FIG. As shown in FIG. 4A, when the front lid 11 is pivoted downward with the shaft 31 as a fulcrum, the dust collecting basket 12 is also pivoted downward with the shaft 14 as a fulcrum. At this time, the dust collecting basket 12 is divided into two parts up and down with the shaft 13 as a fulcrum. The opening of the dust collection basket 12 when it jumps out of the dust storage section 5 is wider than the opening of the dust collection basket 12 stored in the dust storage section 5. As a result, the dust stuck to the inner surface of the dust collecting basket 12 can be easily removed. When the user attaches the tissue paper along the inner surface of the dust collecting basket 12, the end of the tissue paper is sandwiched between the frame of the opening of the dust collecting basket 12 and the outer peripheral end of the front lid 11. In this case, the tissue paper can be prevented from shifting or coming off. As shown in FIG. 4B, the filter 15 is also rotated downward and opened with the shaft 32 as a fulcrum. As a result, the user can easily discharge the dust accumulated outside the dust collecting basket 12 in the case 10, and can easily remove the dust attached to the side surface of the case 10 of the filter 15.

  FIG. 5A is a front view of the front cover of the dust container of the embodiment of the present invention as viewed from the outside of the dust container, and FIG. 5B is a front view of the dust container of the embodiment of the present invention. It is the front view seen from the dust accommodating part of a lid | cover. The hatched portion in the figure shows the frontmost surface, not the cross section. A shaft 31 that is rotatably supported by the case 10 is provided at the lower end of the front lid 11. The front lid has a substantially circular shape. A substantially circular portion outside the shaded portion shown in FIG. 5A can contact the outer peripheral end of the other end surface in the axial direction of the dust separation portion 4. A substantially circular portion inside the hatched portion shown in FIG. 5A can contact the outer peripheral end of the other axial end surface of the inner cylinder 7 of the dust separating portion 4. On the upper side of the front lid 11, that is, on the side opposite to the shaft 31, an opening of the outer flow path 35 is formed between a substantially circular portion outside the shaded portion and a substantially circular portion inside. The opening position on the front side (outside of the dust container 5) of the outer channel 35 may be the left and right sides or the lower side of the front lid 11, but the opening position on the back side (inside the dust container 5) of the outer channel 35 is the front cover. 11, the opening position on the front side of the outer flow path 35 is also preferably above the front lid 11 in order to reduce the pressure loss of the air by reducing the length of the outer flow path 35. . On the other hand, an opening of the inner flow path 36 is formed inside the inner cylinder 7. In the front view of FIG. 5A, the opening area of the inner flow path 36 is larger than the opening area of the outer flow path 35, but the upper semicircular portion in the inner cylinder 7 has a recess 39. Therefore, when the flow rate of air outside the inner cylinder 7 is made larger than the flow rate of air inside the inner cylinder 7, the substantial flow path area is that the opening of the inner flow path 36 is larger than the opening area of the outer flow path 35. The area is smaller. A portion where the opening of the outer flow path 35 between the substantially circular portion outside the shaded portion and the inner substantially circular portion is not formed is closed. A substantially circular portion outside the shaded portion shown in FIG. 5B abuts on the outer peripheral end of the axial end surface of the case 10 and a part of the outer peripheral end of the opening of the dust collecting basket 12. As shown in FIG. 5B, the opening of the outer flow path 35 is formed above the vertical center line of the front lid 11. Thereby, when the vacuum cleaner is stopped, it is possible to prevent the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separator 4. However, the opening of the outer flow path 35 may be formed in the center portion including the vertical center line of the front lid 11. Furthermore, it is preferable to form a check valve (not shown) that covers the outer flow path 35. This further prevents the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separator 4 when the vacuum cleaner is stopped. On the other hand, an opening of the inner flow path 36 is formed near the lower end of the front lid 11. However, the opening position of the inner flow path 36 may be lower than the opening position of the outer flow path 35, or may be on the left or right side or the upper side. The hatched portion on the upper side of the opening of the inner flow path 36 contacts the lower end of the outer peripheral end of the opening of the dust collecting basket 12. Then, as shown in FIG. 5B, the opening area of the outer flow path 35 is larger than the opening area of the inner flow path 36 on the back side of the front lid 11 (inside the dust container 5). Furthermore, as shown in FIGS. 5A and 5B, the opening area (FIG. 5B) of the other end (back side) of the outer flow path 35 is equal to that of one end (front side) of the outer flow path 35. It is larger than the opening area (FIG. 5A). That is, the outer flow path 35 extends from one end to the other end. On the other hand, as shown in FIGS. 5 (A) and 5 (B), the opening area (FIG. 5 (B)) of the other end (back side) of the inner flow path 36 is equal to that of one end (front side) of the inner flow path 36. It is smaller than the opening area (FIG. 5A). That is, the inner flow path 36 is narrowed from one end to the other end.

  FIG. 6 is a front view as seen from the dust separation unit side when the front cover of the dust container of the embodiment of the present invention is removed. As in FIG. 5, the hatched portion in the figure indicates the frontmost surface, not the cross section. The substantially circular shaded portion is in contact with the outer peripheral end of the front lid 11. As shown in FIG. 6, the outer peripheral end of the opening on one end surface in the axial direction of the case 10 abuts a part of the outer peripheral end of the opening of the dust collecting basket 12. As shown in FIG. 6, 80% or more of the opening on one end surface in the axial direction of the case 10 is occupied by the opening of the dust collecting basket 12. A region other than the opening of the dust collection basket 12 in the opening of the case 10 (the remaining 20% or less) faces the opening of the inner flow path 36 and communicates with the inner flow path 36.

  FIG. 7 is a schematic view of a vacuum cleaner according to an embodiment of the present invention. In addition to the vacuum cleaner main body 1, the vacuum cleaner includes a suction tool 50 having a suction port, one end communicating with the suction tool 50, a telescopic joint pipe (extension pipe) 51, and one end communicating with the other end of the joint pipe 51. An operation tube 52 having a handle 53 and an operation button / switch that are gripped by the user, and a hose 54 having one end communicating with the other end of the operation tube 52 and the other end forming the hose coupling tube 20 are provided. The hose joint pipe 20 is inserted into the main body inlet 21 of the cleaner body 1 and can be held. Further, wheels 55 are provided on both side surfaces of the cleaner body 1.

  And if the power supply of a vacuum cleaner is turned ON by operation to an operation button / switch from a user, the electric air blower 28 will act | operate and will generate | occur | produce suction | attraction force. The air sucked from the suction port of the suction tool 50 passes through the joint pipe 51, the operation pipe 52, the hose 54, and the hose joint pipe 20 in this order, and flows into the cleaner body 1.

  In the first embodiment, the dust collector 2 uses a centrifugal action, but may use a filtration method such as a paper pack. Other configurations are the same as those in the first embodiment.

  The present invention is applicable to a vacuum cleaner.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Dust collector 3 Inlet pipe 4 Dust separation part 5 Dust accommodating part 6 Outer cylinder 7 Inner cylinder 8,39 Recessed part 9,19,22,25 Packing 10 Case 11 Front cover 12 Dust collection basket 13,14 , 31, 32 Shaft 15, 29 Filter 16 Handle 17 Button 18 Transmission rod 20 Hose joint pipe 21 Main body inlet 23 Caster support 24 Dust removal device 26 Auxiliary filter 27 Intake duct 27a Opening 27b Discharge port 28 Electric blower 28a Suction port 28b Exhaust Port 30 Main body exhaust port 33 Through hole 34 Outer extension 35 Outer channel 36 Inner channel 38 Guide tube 40 Exhaust duct 41 Cord reel 43 Plug 44 Outer portion 47 Cord 49 Substrate 50 Suction tool 51 Joint tube 52 Operation tube 53 Handle 54 Hose 55 Wheel 60 Plane 61 Partition plate 62 Ring rib 63 Packing retainer 64 Space

Claims (5)

An electric blower and a dust collecting device upstream of the electric blower, and having a connecting air passage that communicates the dust collecting device and the electric blower, the connecting air passage has a substantially rectangular parallelepiped shape, A first opening is provided on the first surface, and the first opening is connected to the dust collector,
The connection air passage includes a second opening on any surface other than the facing surface of the first opening, and the second opening is connected to the electric blower and extends from the first opening to the facing surface. A second surface provided with the second opening, a fourth surface projecting from the third surface facing the second surface, the fourth surface and the third surface, A vacuum cleaner characterized by having a surface perpendicular to the substantially second surface. The vacuum cleaner according to claim 1, wherein
In addition to the fourth surface, there are one or more surfaces that protrude from the third surface toward the second surface, and the substantially second surface that connects these surfaces and the third surface. A vacuum cleaner characterized by having an orthogonal surface. The electric vacuum cleaner according to any one of claims 1 to 2,
The connecting air passage has a plurality of spaces with different depths on the back side of the second opening in a direction extending from the first opening to the opposite side. The electric vacuum cleaner according to any one of claims 1 to 2,
The connecting air passage has a plurality of spaces divided by partitions on the back side of the second opening in a direction extending from the first opening to the opposite side. An electric blower and a dust collecting device upstream of the electric blower, and having a connecting air passage that communicates the dust collecting device and the electric blower, the connecting air passage has a substantially rectangular parallelepiped shape, A first opening is provided on the first surface, and the first opening is connected to the dust collector,
The connection air passage includes a second opening on any surface other than the facing surface of the first opening, the second opening is connected to an electric blower, and the connection air passage is connected to the first air opening. A vacuum cleaner characterized by having a plurality of spaces with different depths on the back side of the second opening in a direction extending from one opening to the opposite side.

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