JP4851801B2 - Electric blower and vacuum cleaner - Google Patents

Description

  The present invention relates to an electric blower having a rectifying plate that rectifies air blown from a centrifugal fan toward a motor, and a vacuum cleaner provided with the same.

  2. Description of the Related Art Conventionally, for example, this type of electric blower used in a vacuum cleaner includes a motor having a rotating shaft, a centrifugal fan attached to the rotating shaft of the motor, and a rectifying plate disposed between the motor and the centrifugal fan. And.

  The rectifying plate has an upstream rectifying plate projecting in a plane spiral wall shape on one main surface of a disc-shaped rectifying plate main body through which the rotation shaft of the motor passes. On the main surface, a downstream rectifying plate projects in the shape of a plane spiral wall in the opposite direction to the upstream rectifying plate, and the air blown from the centrifugal fan to the outer periphery is rectified by the upstream rectifying plate to the outer peripheral edge side of the rectifying plate body The rectified air is further rectified to the motor side by the downstream rectifying plate via the outer peripheral edge of the rectifying plate body, and the motor is cooled by a part of the air.

  By the way, in recent years, more effective use of energy resources has been desired as an approach to environmental problems, and further higher power is desired in vacuum cleaners and the like. In some types of electric blowers, further improvement in efficiency is required.

  On the other hand, in order to improve the output of the electric blower, it is necessary to reduce noise such as driving sound.

Therefore, the diameter of the centrifugal fan is set to 90 mm to 100 mm, nine fan blades of this centrifugal fan are provided, the diameter of the rectifying plate main body is set to 110 mm to 120 mm, 13 upstream rectifying plates are provided, and 16 downstream rectifying plates are provided. There is known an electric blower that is provided to reduce noise while preventing a decrease in efficiency (for example, see Patent Document 1).
JP 2001-12380 A (page 3-5, FIG. 5-8)

  However, although the above-described electric blower has a certain effect on efficiency and noise reduction, the effect is not sufficient, and further improvement in efficiency and noise reduction are desired.

  This invention is made | formed in view of such a point, and it aims at providing the electric blower made quiet while improving efficiency, and a vacuum cleaner provided with the same.

In the present invention, a rectifying plate disposed between a centrifugal fan and a motor has a substantially spiral wall-like shape substantially at the periphery of one main surface of a substantially disc-shaped rectifying plate main body through which a rotation shaft passes. An upstream rectifying plate that is provided with a plurality of protrusions at equal intervals, faces the outer periphery of the centrifugal fan, and rectifies the air blown from the centrifugal fan toward the peripheral side of the rectifying plate main body, and a peripheral portion of the other main surface of the rectifying plate main body And a downstream rectifying plate that rectifies the air rectified by each upstream rectifying plate to the motor side, and is provided with a plurality of flat spiral wall-like shapes in the opposite direction to the upstream rectifying plate and at substantially equal intervals. number of sheets, non-integer times the number of upstream straightening plate of and, the upstream straightening plate number often formed than the shortest between the downstream straightening plate adjacent to the edge of the inlet side of the downstream straightening plate each opening area at a distance position, between the upstream straightening plate adjacent to the outlet side of the edge of the upstream straightening plate In which it is formed larger than the opening area of the short-range position.

According to the present invention, the number of downstream rectifying plates is a non-integer multiple of the number of upstream rectifying plates and more than the number of upstream rectifying plates, and adjacent to the inflow side edge of the downstream rectifying plate. It is larger than the opening area of the shortest distance position between the upstream straightening plate adjacent to the outlet side of the edge of the upstream straightening plate each opening area of the shortest distance position between the downstream straightening vanes to Thus, the efficiency can be improved and the noise can be reduced.

  Hereinafter, the configuration of a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  In FIG. 5, 1 is a vacuum cleaner, and this vacuum cleaner 1 is a so-called cyclone system that separates dust by gravity, and can travel on a floor as a surface to be cleaned. Moreover, this vacuum cleaner 1 can open and close the front side upper part of this main body case body 2 by rotation, connecting the rear part to the main body case body 2 and the upper front side of this main body case body 2 so that rotation is possible. A vacuum cleaner main body 5 having a main body case 4 provided with a cover body 3 is provided. Further, as shown in FIG. 1, an electric blower 6 is accommodated inside the main body case body 2.

  And the dust cup 9 as a dust collector connected to the suction side of the electric blower 6 is detachably attached to the main body case 4. The dust cup 9 swirls the dust sucked together with the suction air blown by the electric blower 6, drops the dust by centrifugal separation by its own weight, collects the dust, and does not want to be sucked into the electric blower 6. It captures dust with a large mass.

  A main body suction port 11 communicating with the suction side of the dust cup 9 is formed in the front side of the lid 3. A hose body 12, an extension pipe 13, and a floor brush 14 are sequentially connected to the main body suction port 11. A hand operating section 15 is provided at the connecting portion between the hose body 12 and the extension pipe 13, and the hand operating section 15 is provided with a plurality of setting buttons 16 for setting the operation mode of the electric blower 6 and the like. ing.

  Furthermore, a power cord (not shown) for supplying power to the electric blower 6 and the like from an external commercial AC power source is led out to the main body case 4.

  As shown in FIG. 1, the electric blower 6 includes a motor 21 disposed in a substantially bottomed cylindrical main body case 22, and a rectification outside the main body case 22. A diffuser 23 as a current rectifying plate and a centrifugal fan 24 rotated by a motor 21 are sequentially attached from the motor 21 side, and the centrifugal fan 24 is covered with a substantially cylindrical fan cover 25. Hereinafter, the vertical direction shown in FIG. 1 will be described as the front-back direction of the electric blower 6.

  The main body case 22 has a case opening 27 formed in the front end surface, and a flange portion 28 having a substantially L-shaped cross section that protrudes toward the outer periphery around the case opening 27. . The rear end surface, which is the other axial end of the main body case 22, is closed by a rear plate portion 29, and the central portion of the rear plate portion 29 protrudes in a substantially cylindrical shape toward the rear side so that the inner peripheral surface side. In addition, a motor head portion 34 for receiving the bearing 31 via a bearing cap 32 and a thrust spring 33 is provided.

  Further, a pair of air outlets 36 serving as exhaust ports are formed in the peripheral surface in the vicinity of the rear portion of the main body case 22 so as to be positioned substantially in the radial direction.

  In addition, a longitudinal plate-like diffuser holding body 38 as a rectifying plate holding body is bridged in the radial direction of the main body case 22 so as to cover a part of the case opening 27 at the front end portion of the main body case 22. Attached. Further, a bearing portion 42 that protrudes in a substantially cylindrical shape toward the front, accommodates the bearing 31 on the inner peripheral side, and opens the through hole 41 at the substantially center is provided at a substantially center of the diffuser holding body 38. Note that the case opening 27 of the main body case 22 that is not covered by the diffuser holder 38 serves as the ventilation opening 43.

  The motor 21 includes a field 45 as a substantially cylindrical stator fixed to the main body case 22 and an armature 46 as an electric element as a rotor disposed inside the field 45. In the armature 46, both end portions of a rotor shaft 48 serving as a rotation shaft provided at the shaft center are rotatably supported by bearings 31 and 31 and are disposed substantially coaxially in the main body case 22.

  Further, a pair of brush mechanisms 51 are positioned in the substantially radial direction in the main body case 22 and are partially protruded from the peripheral surface and fixed by screws or the like. The brush mechanism 51 includes a carbon brush 53 that is in sliding contact with a commutator 52 provided in the armature 46, and a brush holder 54 that holds the carbon brush 53. The brush holder 54 is supported in a state in which the longitudinal direction is substantially orthogonal to the axial direction of the rotor shaft 48 and a part of the brush holder 54 is projected to the outside of the main body case 22. The carbon brush 53 is pressed by the brush holder 54 and is brought into sliding contact with the commutator 52, so that the carbon brush 53 and the commutator 52 are electrically connected to each other.

  The diffuser 23 is fixed to the front side of the diffuser holding body 38 with a screw or the like, for example, and covers and closes the case opening 27 of the main body case 22. As shown in FIGS. 2 to 4, the diffuser 23 includes a diffuser main body 56 as a rectifying plate main body having a predetermined diameter and a front main surface of the diffuser main body 56 from the front side, that is, the centrifugal fan 24 side. A projecting upstream rectifying plate 57 and a downstream rectifying plate 58 projecting from the rear main surface of the diffuser body 56 to the rear side, that is, the motor 21 side, are provided.

  The diffuser main body 56 is provided with a substantially circular through hole 61 into which the bearing portion 42 of the diffuser holding body 38 is fitted and inserted substantially at the center. Here, as the electric blower 6 of the electric vacuum cleaner 1 (FIG. 5), the cleaner body 5 is dragged and moved during the cleaning operation, or the cleaning operator directly moves the cleaner to move it. The diffuser body 56 is formed to have a diameter of 110 mm or more and 120 mm or less, specifically 114 mm, for example. Yes.

  In addition, a plurality of substantially triangular notches 62 are formed at equal intervals on the periphery of the diffuser main body 56 so as to gradually increase in width toward the center along the circumferential direction, and the periphery is notched like a saw blade. It has become.

  The upstream flow straightening plate 57 is formed in an arc wall shape substantially perpendicular to the diffuser main body 56 in the vicinity of the peripheral edge through a distance slightly larger than the radial dimension of the centrifugal fan 24 from the center, and a plurality of spiral vortex plates are formed in a plane spiral shape. Are disposed at substantially equal intervals.

  Further, the upstream rectifying plate 57 has an end edge located on the center side of the diffuser body 56 facing the centrifugal fan 24, and a fan accommodating portion 64 that accommodates the centrifugal fan 24 in a substantially cylindrical shape inside the upstream rectifying plate 57. Is partitioned.

  The upstream rectifying plate 57 is located on the outer peripheral edge of the diffuser main body 56 at a position where the peripheral edge of the diffuser main body 56 is not cut out by the notch 62, and between the upstream rectifying plates 57 and 57, the diffuser main body A guide air passage 66 that gradually becomes wider in the outer peripheral direction of 56 and continues to the notch 62 is defined.

  Here, the amount of protrusion of the upstream rectifying plate 57 from the diffuser body 56 increases as the air volume increases, and the degree of vacuum increases as the upstream rectifying plate 57 decreases, so in this embodiment, the amount of protrusion of the upstream rectifying plate 57 from the diffuser body 56 increases. The dimension t1 (FIG. 3) is set to a predetermined amount, for example, 9 mm, which is suppressed from 9.5 to 10 mm, which is a protruding dimension from the diffuser body of the upstream rectifying plate of the conventional electric blower.

  Further, the upstream rectifying plate 57 is provided with an abutment surface 68 formed by cutting out along the curvature of the outer periphery of the diffuser main body 56 at the edge located on the outer side at the end located on the outer peripheral side of the diffuser main body 56. ing. Further, the upstream rectifying plate 57 is formed thinly along the center side at the edge portion located on the fan housing portion 64 side which is the center side of the diffuser body 56 and on the outer side, and turbulent flow is caused at the edge portion. A guide inclined surface 69 that guides the air to the guide air passage 66 without being generated is provided.

  Here, if the number of the upstream rectifying plates 57 is small and the width of the guide air passages 66 and 66 is wide, the air blown from the centrifugal fan 24 is not efficiently guided to the outer peripheral side of the diffuser body 56 in a spiral shape. While the fan efficiency decreases, the number of upstream rectifying plates 57 increases and the width of the guide air passage 66 increases, so that the frictional resistance with the flowing air increases and the electric fan efficiency decreases and noise is generated. growing. Therefore, the upstream rectifying plate 57 is set to 13 sheets, for example, so that the noise can be reduced to the maximum while ensuring the efficiency of the electric blower.

  On the other hand, the downstream rectifying plate 58 is formed in an arc wall shape substantially perpendicular to the diffuser body 56, and a plurality of downstream rectifying plates are arranged in a plane spiral shape in a direction opposite to the spiral direction of the upstream rectifying plate 57, and are arranged at substantially equal intervals. A flow passage 71 is defined between the downstream rectifying plates 58 and 58.

  In addition, the downstream rectifying plate 58 is notched at the edge portion located on the outer peripheral side of the diffuser body 56 and on the outer edge portion, and is substantially parallel to the curvature of the outer periphery of the diffuser body 56 at the edge portion. An overflow inclined surface 72 that guides air to the overflow passage 71 without generating turbulent flow is provided.

  The downstream rectifying plate 58 has a projecting dimension t2 (FIG. 3) from the diffuser body 56 set to a predetermined amount, for example, 13 mm. That is, the downstream rectifying plate 58 has a protruding amount from the diffuser body 56 larger than the protruding amount of the upstream rectifying plate 57, and is set to about 1.44 times.

  Here, the downstream rectifying plates 58 are formed to be a non-integer multiple of the number of the upstream rectifying plates 57 and more than the number of the upstream rectifying plates 57. For example, when the number of downstream rectifying plates 58 is 16, the maximum value of noise is low, and there is little noise that appears strongly in a predetermined peak frequency band. Therefore, setting the number of downstream rectifying plates 58 to 16 ensures electric fan efficiency. However, noise can be reduced to the maximum.

  For this reason, as shown in FIG. 4, the pitch P1 of the downstream rectifying plates 58, 58 is smaller than the pitch P2 of the upstream rectifying plates 57, 57, and the pitch P2 is a non-integer multiple of the pitch P1. Therefore, the positions of the upstream openings H1 that are the inflow side of the downstream rectifying plate 58 and the downstream openings H2 that are the outflow side of the upstream rectifying plate 57 near the opening H1 are in the circumferential direction of the diffuser 23. It is comprised so that it may shift relatively.

Further, the opening area S1 of each opening H1 on the upstream side of the downstream rectifying plate 58, that is, the cross-sectional area between the outer peripheral edges of the downstream rectifying plates 58 and 58 is the opening area of each opening H2 on the downstream side of the upstream rectifying plate 57 S2 is formed larger than the cross-sectional area between the outer peripheral edge portions of the upstream rectifying plates 57, 57. Specifically, the opening area S1 is 13 mm which is a projecting dimension t2 (FIG. 3) of the downstream rectifying plate 58 from the diffuser main body 56 and 4 mm which is the shortest distance between the outer peripheral edges of the downstream rectifying plates 58 and 58. The product, that is, S1 = 13 × 4 = 52 mm ² is set, and the opening area S2 is 9 mm which is the projecting dimension t1 (FIG. 3) of the upstream rectifying plate 57 from the diffuser body 56 and the upstream rectifying plates 57 and 57 The product of 4.5 mm which is the shortest distance between the peripheral portions, that is, S2 = 9 × 4.5 = 40.5 mm ² is set. Accordingly, the total area of the upstream opening of the downstream rectifying plate 58 is S1 × 16 = 832 mm ² , and the total area of the downstream opening of the upstream rectifying plate 57 is S2 × 13 = 526.5 mm ² , The total opening area on the upstream side of the downstream rectifying plate 58 is about 158% of the total opening area on the upstream side of the upstream rectifying plate 57.

  Returning to FIG. 1, the centrifugal fan 24 has heat resistance against heat generated by friction with air generated by rotation, and is made of, for example, an aluminum alloy in consideration of inertia or weight at the time of rotation. A disk-shaped lower plate 75, an upper plate 76 facing the lower plate 75 with a predetermined gap, and a fan blade 77 joined between the lower plate 75 and the upper plate 76. And have.

  The lower plate 75 is substantially disc-shaped and has a fitting insertion hole (not shown) through which the rotor shaft 48 of the motor 21 is fitted at the center, and has a diameter of, for example, 90 mm to 100 mm, specifically about 95 mm. Has been. The diameter dimension of the lower plate 75 is set due to the size restriction of the electric vacuum cleaner 1 (FIG. 5) as the electric blower 6, similarly to the diameter dimension of the diffuser body 56 of the diffuser 23.

  The upper plate 76 is disposed so as to have a gap of about 8 mm opposite to the lower plate 75, for example, at an outer peripheral edge portion that is an air outlet. The upper plate 76 has a substantially disc shape with the same diameter as that of the lower plate 75. The central portion is curved toward one surface and is formed to expand toward the lower plate side, and a ventilation port 79 is formed at the center. Has been.

  The fan blades 77 are formed in a wall shape by joining both side edges in the longitudinal direction to the lower plate 75 and the upper plate 76, respectively, and are formed in a direction opposite to the spiral direction of the fan blades 77 of the centrifugal fan 24. The fan blades 77 have claw portions (not shown) inserted into slits provided in the lower plate 75 and the upper plate 76 on both side edges in the longitudinal direction and connected to the lower plate 75 and the upper plate 76 by welding or the like. Multiple protrusions are provided. The fan blades 77 are connected and integrally connected between the lower plate 75 and the upper plate 76 so that the lower plate 75 and the upper plate 76 and the fan blades 77 face each other in a spiral shape. A plurality of air passages 81 are formed.

  Here, as a result of experiment on the relationship between the electric blower efficiency and the noise by setting the upstream rectifying plate 57 to 13 pieces, the electric blower efficiency tends to be higher when the number of fan blades 77 is less than 9 pieces. At the same time, there are many peak-like parts where the noise is large, particularly the noise at a predetermined frequency, and the increase rate of the noise is large when the input voltage to the electric blower 6 is small, that is, the slope of the peak There is a tendency that the noise is large and the noise becomes large from the stage of a small input voltage. In particular, the number of fan blades 77 having seven and eight fan blades has a large noise increase rate.

  Therefore, it is preferable to set the number of fan blades 77 to nine under the conditions of the diameter dimensions of the diffuser 23, the centrifugal fan 24, and the like due to the efficiency of the electric blower and the noise characteristics.

  The centrifugal fan 24 includes a sleeve 84 fitted to the rotor shaft 48 and a hexagon nut 86 screwed to a screw portion 85 formed on the front side of the rotor shaft 48 via washers 87, 87. It is clamped and fixed to the front end of the armature 46.

  The centrifugal fan 24 rotates in a spiral direction toward the center of the fan blade 77 by the rotation of the rotor shaft 48.

  The fan cover 25 is fitted to the outer peripheral portion of the flange portion 28 of the main body case 22, and the centrifugal fan 24 is covered by the fan cover 25. The fan cover 25 is formed in a substantially cylindrical shape with an opening 88 formed in the center of the front surface facing the ventilation port 79 of the centrifugal fan 24 and a rear opening 89 formed in the entire rear surface. Yes. Further, the inner diameter of the fan cover 25 is set to 115 mm or more and 125 mm or less. The inner diameter of the fan cover 25 is the same as the diameter of the diffuser main body 56 of the diffuser 23 and the diameter of the centrifugal fan 24. The size restriction of the electric vacuum cleaner 1 (FIG. 5) as the electric blower 6 and the like. It is set by.

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

  When cleaning, attach the dust cup 9 to the main body case 4, connect the hose body 12, the extension pipe 13 and the floor brush 14 to the main body suction port 11 in order, and then connect the power cord led out from the main body case 4 to commercial AC By connecting to a power outlet, holding the hand control unit 15 and operating a predetermined setting button 16, the motor 21 of the electric blower 6 is driven by the power supplied from the commercial AC power source, and the centrifugal fan 24 rotates. Inhale air from the tip of the floor brush 14.

  The operator touches the floor brush 14 on the floor surface and operates it back and forth, thereby sucking dust on the floor surface together with air from the tip of the floor brush 14.

  The sucked dust is sucked into the dust cup 9 together with the air through the extension pipe 13, the hose body 12 and the main body suction port 11, separated from the air in the dust cup 9, and collected in the dust cup 9. Be dusted.

  The air from which the dust has been removed is sucked into the ventilation port 79 of the centrifugal fan 24 via the intake port 88 of the fan cover 25 of the electric blower 6, and passes through the intake air passage 81 along the fan blades 77 of the centrifugal fan 24. The centrifugal fan 24 moves to the outer peripheral side and is blown outward.

The air blown out from the outer periphery of the centrifugal fan 24 is guided by the upstream rectifying plates 57, 57 of the opposing diffuser 23, passes through each guide air passage 66 in a spiral shape, and opens from the opening H2 to the outer peripheral side of the diffuser main body 56. To flow into.

Further, the air flowing to the outer peripheral side of the diffuser main body 56 flows to the rear surface side of the diffuser main body 56 through the notch 62, and flows from the opening H1 to the air flow passage 71 between the downstream rectifying plates 58 and 58. The air flows through the air flow passage 71, flows in a spiral toward the center of the diffuser 23, and flows into the main body case 22 from the vent hole 43 of the main body case 22 located on the rear surface side of the diffuser 23. Then, while cooling the motor 21, it flows through the air outlet 36.

As described above, according to the above embodiment, the number of the downstream rectifying plates 58 is a non-integer multiple of the number of the upstream rectifying plates 57 and more than the number of the upstream rectifying plates 57. Since the pitch P1 and the pitch P2 are deviated, the rotational sound and wind noise of the centrifugal fan 24 can be canceled by the deviation of the pitches P1 and P2, and the opening area S1 on the upstream side of the downstream rectifying plate 58 is upstream. By forming it larger than the opening area on the outflow side of the rectifying plate 57, the air blown from the opening H2 of the upstream rectifying plate 57 is efficiently sucked from the opening H1 of the downstream rectifying plate 58, so that the efficiency of the electric blower 6 is improved. It can be improved.

  In the diffuser 23, the diameter of the diffuser body 56 is set to 110 mm or more and 120 mm or less, the upstream rectifying plate 57 is set to 13 sheets, and the downstream rectifying plate 58 is set to 16 sheets. The noise can be reduced to the maximum without lowering.

  Furthermore, the diameter of the centrifugal fan 24 is set to 90 mm or more and 100 mm or less, and nine fan blades 77 are formed, so that the noise can be further reduced without reducing the efficiency of the electric blower 6.

  And by applying the said electric blower 6 which suppressed the protrusion amount of the upstream baffle plate 57 rather than the conventional electric blower to the cyclone type vacuum cleaner 1, a vacuum degree can be increased and cyclone separation can be performed efficiently. , Can improve the suction work rate.

  In addition, in the said one Embodiment, the electric blower 6 is applicable to other various things, such as an industrial blower other than the vacuum cleaner 1, for example.

  Further, the electric vacuum cleaner is not limited to the canister type, and may be a self-propelled electric vacuum cleaner, for example, or an upright type in which the floor brush 14 is directly formed on the lower surface of the vacuum cleaner body 5 or a handy type. Even molds can be used correspondingly.

It is a disassembled perspective view which shows the electric blower of one embodiment of this invention. It is a top view which shows an electric blower same as the above. It is a side view which shows an electric blower same as the above. It is a perspective view which expands and shows a part of electric blower same as the above. It is a perspective view which shows the electric vacuum cleaner provided with the electric blower same as the above.

Explanation of symbols

1 electric vacuum cleaner 5 vacuum cleaner body 6 electric blower
21 Motor
23 Diffuser as rectifying plate
24 Centrifugal fan
45 Field as a stator
46 Armature as a rotor
48 Rotor shaft as rotating shaft
56 Diffuser body as current plate body
57 Upstream rectifier
58 Downstream rectifier
77 fan wings

Claims (4)

A motor having a stator and a rotor having a rotation shaft and rotatable with respect to the stator;
A centrifugal fan provided on one end of the rotating shaft;
A rectifying plate disposed between the centrifugal fan and the motor;
The current plate is
A substantially disc-shaped rectifying plate main body through which the rotating shaft passes;
A plurality of planar spiral wall-like projections are provided at substantially equal intervals on the peripheral edge of one main surface of the rectifying plate main body, and the air blown from the centrifugal fan faces the outer periphery of the centrifugal fan. An upstream rectifying plate that rectifies to the peripheral side of the
A plurality of planar spiral wall-like shapes in the opposite direction to the upstream rectifying plate from the peripheral edge of the other main surface of the rectifying plate main body, and a plurality of air rectified by the respective upstream rectifying plates are provided on the motor side. A downstream rectifying plate that rectifies into
The number of downstream rectifying plates is a non-integer multiple of the number of upstream rectifying plates, and more than the number of upstream rectifying plates,
Each opening area at the position of the shortest distance between the inflow side edge of the downstream rectification plate and the adjacent downstream rectification plate is the same as the upstream rectification plate adjacent to the outflow side edge of the upstream rectification plate. An electric blower characterized by being formed larger than each opening area at the shortest distance between them. The upstream current plate protrudes 9mm from one main surface of the current plate body,
The electric blower according to claim 1, wherein the downstream current plate protrudes 13 mm from the other main surface of the current plate body. The current plate body is formed with a diameter of 110 mm or more and 120 mm or less,
13 upstream rectifying plates are formed,
Sixteen downstream current plates are formed,
The electric fan according to claim 2, wherein the centrifugal fan includes nine fan blades having a diameter of 90 mm to 100 mm. The electric blower according to any one of claims 1 to 3,
A vacuum cleaner comprising: a vacuum cleaner body that houses the electric blower.

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