JP2012067691A - Soundproof structure of electric blower and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof structure of an electric blower, which can improve a soundproof effect without increasing the number of man-hours and the number of parts.SOLUTION: There is provided the soundproof structure of the electric blower 30 in which a soundproof material 35 covering an exhaust port 32b is arranged around the electric blower 30 where a motor 31 is arranged in a cylindrical fan case 32 with the exhaust port 32b being opened on the peripheral surface. A projection part 33 projecting to the peripheral surface of the fan case 32 is arranged and an insertion part 35a formed on the soundproof material 35 is inserted into the projection part 33 for spirally winding the soundproof material 35 on the peripheral surface of the fan case 32.

Description

  The present invention relates to a soundproof structure for an electric blower in which a soundproofing material is arranged on a peripheral surface of the electric blower, and a vacuum cleaner using the same.

  A conventional vacuum cleaner is disclosed in Patent Document 1. In this vacuum cleaner, an electric blower that generates a suction airflow is arranged in the main body, and a dust collection chamber for collecting dust is arranged in front of the electric blower. The electric blower is configured by covering an impeller and a motor with a fan case. An intake port is opened at the end surface in the axial direction of the fan case, and an exhaust port is opened at the peripheral surface.

  An elastic soundproofing material having sound absorbing properties such as urethane foam is disposed on the peripheral surface of the fan case. The soundproof material is formed in a plate shape extending in one direction, and both ends are connected. Thus, the electric blower is inserted into the annular soundproof material, and the exhaust port is covered with the soundproof material.

  A negative pressure is generated in the dust collection chamber by driving the electric blower, and an air flow containing dust flows into the dust collection chamber. Dust is collected in the dust collection chamber, and the airflow from which the dust has been removed flows into the fan case from the intake port and is exhausted from the exhaust port. The exhaust from the exhaust port passes through the soundproofing material and flows out from the main body. Thereby, the noise of an electric blower can be reduced.

JP-A-11-99098 (2nd page-4th page, Fig. 3)

  According to the conventional electric vacuum cleaner, the electric blower is inserted into the annular soundproof material. For this reason, if the soundproofing material is formed thick in order to improve the soundproofing effect, the flexibility is lowered and it cannot be easily formed into an annular shape. Therefore, there is a problem that the number of steps for forming the soundproof structure increases. In addition, when a plurality of annular soundproofing materials are provided to overlap in the radial direction, the insertion work of the soundproofing material increases and the number of man-hours increases, and the number of parts increases because a plurality of soundproofing materials with different diameters are required. There was also.

  An object of this invention is to provide the soundproof structure of the electric blower which can improve a soundproofing effect, without increasing a man-hour and a number of parts, and a vacuum cleaner using the same.

  In order to achieve the above object, the present invention provides a soundproof structure for an electric blower in which a soundproof material covering the exhaust port is disposed around an electric blower in which a motor is disposed in a cylindrical fan case having an exhaust port opened on a peripheral surface. A projecting portion projecting on the peripheral surface of the fan case is provided, and an insertion portion formed on the soundproof material is inserted into the projecting portion, and the soundproof material is wound around the peripheral surface of the fan case in a spiral shape. It is characterized by.

  According to this configuration, the electric blower is covered with the fan case, and the plate-like soundproof material is wound around the peripheral surface of the fan case in a spiral shape. Thereby, the exhaust port opened to the surrounding surface of a fan case is covered with a soundproof material. At this time, the protrusion is provided on the peripheral surface of the fan case so that the soundproof material is wound around the insertion portion provided in the soundproof material.

  According to the present invention, in the soundproof structure of the electric blower configured as described above, the electric blower includes a commutator motor having a brush, and the protrusion includes a brush holder that houses the brush.

  According to the present invention, in the soundproof structure for an electric blower having the above-described configuration, the insertion portion is formed of a through hole having a closed periphery.

  According to the present invention, in the soundproof structure of the electric blower configured as described above, the soundproof material is laminated in a plurality of layers over the entire circumference of the fan case by winding.

  Further, the present invention is characterized in that, in the soundproof structure of the electric blower having the above-described configuration, the number of the soundproof materials stacked at a position away from the exhaust port is smaller than the number of the soundproof materials stacked facing the exhaust port. Yes. According to this configuration, the exhaust from the exhaust port circulates in the circumferential direction inside the soundproof material and is discharged to the outside from a position where the number of stacked layers is small.

  Moreover, the vacuum cleaner of the present invention is characterized by including the soundproof structure of the electric blower having the above-described configuration.

  According to the present invention, since the soundproof material is spirally wound around the peripheral surface of the fan case by inserting the insertion portion formed in the soundproof material into the protruding portion of the fan case, it is easy to make one thin soundproof material having flexibility. And can be wound around a range longer than one round. At this time, since the protruding portion is inserted into the insertion portion, it is possible to prevent rotation of the soundproofing material and improve workability, and to prevent generation of a gap between the soundproofing material and the fan case. Therefore, the soundproofing effect can be improved without increasing the number of steps and the number of parts of the soundproofing structure of the electric blower.

The perspective view which shows the vacuum cleaner of embodiment of this invention Side surface sectional drawing which shows the main-body part of the vacuum cleaner of embodiment of this invention The perspective view which shows the electric blower of the vacuum cleaner of embodiment of this invention Top surface sectional drawing which shows the electric blower of the vacuum cleaner of embodiment of this invention The top view which shows the soundproof material of the vacuum cleaner of embodiment of this invention

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a vacuum cleaner according to an embodiment. The vacuum cleaner 1 includes a main body 2 that houses an electric blower 30 (see FIG. 2). A power cord 8 that can be pulled out and stored is provided on the back surface of the main body 2. The power cord 8 has a power plug 9 at its tip, and is supplied to the main unit 2 by being inserted into a commercial power outlet.

  A flexible connection hose 3 is connected to the front surface of the main body 2, and an extension pipe 4 is connected to the tip of the connection hose 3. A suction port body 5 having a suction port (not shown) facing the floor surface is provided at the tip of the extension pipe 4. The extension pipe 4 is provided with a pipe gripping portion 13 and an operation portion 14. A cleaning operation is performed by operating the operation unit 14 by a user, and the suction port body 5 can be moved by gripping the pipe gripping portion 13.

  FIG. 2 shows a side sectional view of the main body 2. The main body 2 is covered with a main body cover 10 of a resin molded product. A connection port 10a for connecting the connection hose 3 (see FIG. 1) is opened on the front surface of the main body cover 10, and a main body exhaust port 10b is opened on the rear surface.

  A dust collection unit 20 that collects dust is disposed in front of the main body unit 20. The dust collection unit 20 includes a dust collection container 22 and a filter 37, and is formed so as to be detachable from the main body cover 10 by gripping the grip unit 41. An inflow port 22 a communicating with the connection port 10 a is provided on the peripheral surface of the dust collection container 22. The inflow port 22a allows an air flow to flow into the dust collecting container 22 so as to form a swirling air flow. An exhaust passage 42 that opens a dust collector exhaust port 42 a is provided on the back surface of the dust collector 20.

  An electric blower 30 having a soundproofing material 35 (see FIG. 4) disposed around the rear of the main body 2 is disposed. A cup-shaped housing 16 having an opening face disposed downward is fitted over the electric blower 30 via a buffer 18 made of synthetic rubber or the like. The shock absorber 18 can absorb vibration of the electric blower 30 and improve the airtightness of the air flow path.

  A hole 16a is opened on the upper surface of the housing 16, and a duct 15 that connects the hole 16a and the dust collecting portion exhaust port 42a is provided. An engaging portion 16 b that engages with a rib 10 d provided on the inner surface of the main body cover 10 is formed at the front portion of the housing 16. A screw portion 16 c that is screwed to the main body cover 10 is formed at the rear portion of the housing 16.

  A housing 17 that covers the lower portion of the electric blower 30 is engaged with the housing 16 that covers the upper portion of the electric blower 30. The housing 17 supports the lower end of the electric blower 30, and the engaging portion 17 a provided at the front portion is engaged with the inner surface of the main body cover 10.

  FIG. 3 shows a perspective view of the electric blower 30. FIG. 4 shows a top sectional view of the electric blower 30 provided with the soundproof material 35. In the electric blower 30, an impeller (not shown) is connected to a motor shaft 31 a of a motor 31 and is covered with a cylindrical fan case 32. The upper fan part 32 c of the fan case 32 that houses the impeller is formed larger in the radial direction than the lower motor part 32 d that houses the motor 31. An intake port 32a is opened at the axial end surface of the fan portion 32c, and an exhaust port 32b is opened at the peripheral surface of the motor portion 32d.

  The motor 31 is a commutator motor having a brush 31e. A stator 31c is disposed on the outer peripheral portion of the motor 31, and a rotor 31b having a motor shaft 31a is disposed opposite to the inner peripheral side of the stator 31c. The rotor 31b has a commutator 31d, and a brush 31e accommodated in a brush holder 33 protruding from the peripheral surface of the fan case 32 is disposed in contact with the commutator 31d. The brush holder 33 constitutes a protruding portion that protrudes from the peripheral surface of the fan case 32.

  A soundproof material 35 covering the exhaust port 32b is disposed around the motor unit 32d. FIG. 5 shows a plan view of the soundproof material 35. The soundproof material 35 is made of an elastic body having sound absorption properties such as urethane foam, and is formed extending in one direction. The soundproof material 35 is provided with a plurality of insertion portions 35a through which the brush holder 33 is inserted at predetermined intervals.

  In the present embodiment, the insertion portion 35 a is formed of a rectangular through hole whose periphery is closed corresponding to the cross-sectional shape of the brush holder 33. The insertion part 35a may be formed by a polygonal, circular, or slit-shaped through hole. Further, the insertion part 35a is not limited to the through hole whose periphery is closed, and the insertion part 35a may be formed by a notch having an open end on the end surface of the soundproof material 35.

  The long soundproof material 35 is spirally wound around the peripheral surface of the motor portion 32d by inserting the brush holder 33 through the insertion portion 35a. Thereby, even if the one soundproof material 35 is laminated | stacked and the thin soundproof material 35 which has a softness | flexibility and deform | transforms easily is used, it can ensure substantial thickness. Therefore, the soundproofing effect can be improved without increasing the number of steps and the number of parts of the soundproofing structure of the electric blower.

  At this time, since the brush holder 33 is inserted into the insertion portion 35a, the soundproof material 35 can be prevented from rotating and workability can be improved. Thereby, the man-hour of the soundproof structure of an electric blower can be made lower. Further, when the insertion portion 35a is not provided, the soundproof material 35 comes into contact with the tip of the brush holder 33, and a gap is generated between the soundproof material 35 and the fan case 31, so that the soundproof effect is lowered. For this reason, by inserting the brush holder 33 into the insertion portion 35a, the soundproofing material 35 is brought into close contact with the fan case 31, and the generation of a gap can be prevented to further improve the soundproofing effect.

  If the soundproof material 35 is wound in a range longer than one turn of the fan case 32, a soundproofing effect can be obtained, but it is more desirable to wind the soundproof material 35 more than twice. Thereby, the soundproof material 35 is laminated | stacked on multiple layers over the perimeter of the fan case 32, and the substantial thickness of the soundproof material 35 can be thickened in a perimeter.

  In this embodiment, the soundproof material 35 facing the exhaust port 32b is laminated in three layers, and the soundproof material 35 is laminated in two layers at a position facing the exhaust port 32b. In other words, the number of soundproof materials 35 at a position away from the exhaust port 32b is smaller than the number of soundproof materials 35 facing the exhaust port 35b. Since the flow resistance in the radial direction is small at the position where the number of laminations is small, the exhaust from the exhaust port 32b flows in the circumferential direction inside the soundproof material 35 and is discharged to the outside from the position where the number of laminations is small. Thereby, the path | route through which an airflow passes the soundproof material 35 can be lengthened, and the soundproofing effect can be improved more.

  In the vacuum cleaner 1 configured as described above, a negative pressure is generated in the dust collecting unit 20 by driving the electric blower 30, and dust on the floor surface is sucked from the suction port body 5 and flows through the extension pipe 4 and the connection hose 3. The air flow including dust flows into the dust collecting container 22 of the dust collecting unit 20 through the connection port 10a and the inflow port 22a, and forms a swirling air flow in the dust collecting container 22. The relatively large dust contained in the airflow is removed by the centrifugal force of the swirling airflow, and is accumulated in the dust collecting container 22.

  The airflow from which the large dust has been removed rises, and fine dust is collected by the filter 37. The airflow that has passed through the filter 37 flows through the exhaust passage 42 and flows out of the dust collector 20 through the dust collector exhaust port 42a. The airflow flowing out from the dust collection unit 20 flows through the duct 15 and is exhausted from the exhaust port 32b through the electric blower 30. The exhaust from the exhaust port 32b passes through the soundproof material 35 and is discharged to the outside from the main body exhaust port 10b. Thereby, the noise of the electric blower 30 can be reduced.

  According to the present embodiment, the insertion portion 35a formed in the soundproof material 35 is inserted into the brush holder 33 that forms the protruding portion of the fan case 32, and the soundproof material is wound around the peripheral surface of the fan case 32 in a spiral shape. One thin soundproof material 35 having flexibility can be easily deformed and wound around a range longer than one round. At this time, since the brush holder 33 is inserted into the insertion portion 35a, it is possible to prevent the soundproof material 35 from rotating and to improve workability, and to prevent a gap between the soundproof material 35 and the fan case 32 from being generated. Therefore, the soundproofing effect can be improved without increasing the number of steps and the number of parts of the soundproofing structure of the electric blower 30.

  In addition, a screw etc. may be provided in the surrounding surface of the fan case 32, a protrusion part may be formed, the soundproof material 35 may be wound by inserting this protrusion part into the insertion part 35a. However, if the protrusion part inserted in the insertion part 35a by the brush holder 33 is comprised, since it is not necessary to provide a protrusion part separately, the number of parts can be reduced.

  Further, when the insertion portion 35 a is formed by a notch having an open end, a circumferential force acts when the soundproof material 35 is wound, and the insertion portion 35 a is easily dropped from the brush holder 33. For this reason, if the insertion part 35a is formed by a through-hole having a closed periphery, the dropout of the insertion part 35a from the brush holder 33 can be reduced. Therefore, the workability at the time of assembling the soundproof structure can be further improved.

  Further, since the soundproof material 35 is laminated in a plurality of layers over the entire circumference of the fan case 32 by winding, the substantial thickness of the soundproof material 35 can be increased over the entire circumference of the fan case 32. Therefore, a high soundproofing effect can be obtained by the thin soundproofing material 35 having flexibility and easily deforming.

  In addition, since the number of soundproofing materials 35 positioned far from the exhaust port 32b is smaller than the number of soundproofing materials 35 facing the exhaust port 32b, the path through which the airflow passes through the soundproofing material 35 can be lengthened. The soundproofing effect can be further improved.

  In the present embodiment, the vacuum cleaner 1 is formed in a canister type in which the suction port body 5 is connected to the main body portion 2 that houses the electric blower 30 via the connection hose 3. May be a vertical vacuum cleaner provided integrally.

  According to this invention, it can utilize for the vacuum cleaner provided with the electric blower.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Main part 3 Connection hose 4 Extension pipe 5 Suction inlet 10 Main body cover 16, 17 Housing 18 Buffer 20 Dust collector 22 Dust collection container 22a Inlet 30 Electric blower 31 Motor 31a Rotating shaft 31b Rotor 31c Stator 31d Commutator 31e Brush 32 Fan case 32a Intake port 32b Exhaust port 33 Brush holder 35 Soundproof material 35a Insertion part 42 Exhaust flow path 42a Dust collection part exhaust port

Claims (6)

  In a soundproof structure of an electric blower in which a soundproof material covering the exhaust port is arranged around an electric blower in which a motor is arranged in a cylindrical fan case having an exhaust port opened on a peripheral surface thereof, the protrusion protrudes from the peripheral surface of the fan case A soundproof structure for an electric blower, characterized in that a projecting portion is provided, an insertion portion formed in the soundproof material is inserted into the projecting portion, and the soundproof material is spirally wound around a peripheral surface of the fan case.   The soundproof structure for an electric blower according to claim 1, wherein the electric blower includes a commutator motor having a brush, and the protrusion includes a brush holder that houses the brush.   The soundproof structure for an electric blower according to claim 1 or 2, wherein the insertion portion is formed of a through hole having a closed periphery.   The soundproof structure for an electric blower according to any one of claims 1 to 3, wherein the soundproof material is laminated in a plurality of layers over the entire circumference of the fan case by winding.   5. The soundproof structure for an electric blower according to claim 4, wherein the number of the soundproof materials stacked at a position away from the exhaust port is smaller than the number of the soundproof materials stacked facing the exhaust port.   An electric vacuum cleaner comprising the soundproof structure for an electric blower according to any one of claims 1 to 5.

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