JP6375516B2 - Electric blower and electric vacuum cleaner using it - Google Patents

Description

  The present invention relates to an electric blower and a vacuum cleaner used for a vacuum cleaner and the like.

  FIG. 7 shows a configuration of a conventional general electric blower (see, for example, Patent Document 1). FIG. 7 is a half sectional view showing a configuration of a conventional electric blower described in Patent Document 1. In FIG.

  As shown in FIG. 7, the conventional electric blower 1 is located on the outer periphery of the electric motor 2, the rotary fan 4 provided at one end of the shaft 3 that is the output shaft of the electric motor 2, and a plurality of blades. The diffuser 6 includes a plurality of fixed blades 5 that rectify the wind discharged from the rotating fan 4, and the fan case 8 that covers the rotating fan 4 and the diffuser 6 and has an air inlet 7 in the center.

  The electric motor 2 includes a field core 9 formed by laminating a plurality of electromagnetic steel plates, an insulating material between the field core 9 and the field winding 11, and a winding frame that serves as a base for winding the field winding 11. 10, a field winding 11 is wound around the winding frame 10, one end of the field winding 11 is connected to a carbon brush (not shown), and the other end is connected to a power supply terminal 12. 12 is disposed inside the field assembly 14, which is provided in the winding frame 10 and configured by being inserted into the terminal block 13, and the armature winding 15 is provided in a slot (not shown). The armature core 16 housed in the armature assembly 16 is composed of a laminated core, and an armature assembly 18 having a shaft 3 as an output shaft and a commutator 17 provided at one end of the shaft 3 is provided at the center. Has a flange portion 19a so that the power terminal 12 side becomes the rotary fan 4 side. Is press-fitted to the inner wall of the substantially cylindrical bracket 19, the armature assembly 18 is held in the bracket 19 so as to be rotatable via a bearing 20.

  Further, the bracket 19 is provided with an exhaust port as an outlet for air sucked from the intake port 7, and an exhaust port provided on the counter-rotating fan 4 side from the field iron core 9 is a downstream exhaust port 21.

  In the case of this conventional example, an opening window for supplying power by connection between the power supply terminal 12 and an external lead wire (not shown) is required, and is located near the power supply terminal 12 and from the field core 9. An opening located on the rotary fan 4 side is an upstream exhaust port 22.

  The operation of the conventional electric blower configured as described above is as follows.

  When the electric blower 1 is operated, the electric motor 2 is energized in the order of the field winding 11, the carbon brush, the commutator 17, and the armature winding 15 when a voltage is applied from the power supply terminal 12. The rotational position of the armature assembly 18 is moved by the action of the magnetic field generated by the winding 11 and the magnetic field of the armature winding 15. Even if the rotational position of the armature assembly 18 is moved, the commutator 17 and the carbon brush are always in contact with each other. The electric motor 2 operates so that the rotation continues.

  Due to the centrifugal force generated by the rotation of the rotary fan 4 connected to the shaft 3 in conjunction with this operation, the internal pressure of the rotary fan 4 becomes negative with respect to the external air pressure and sucks wind. The sucked air enters the electric blower 1 through the air inlet 7 of the fan case 8, passes through the rotary fan 4, the diffuser 6, and the bracket 19 of the electric motor 2, passes through the field assembly 14, the armature assembly 18, and the carbon. While cooling the brush, the bearing 20 and the like, the air is finally discharged from the downstream exhaust port 21 to the outside of the electric blower 1.

  A part of the air passes through the rotary fan 4 and the diffuser 6 and is directly discharged from the upstream exhaust port 22 to the outside of the electric blower 1.

JP 2009-261057 A

  However, in the configuration of the above-described conventional electric blower, the bracket 19 is often made of a metal material because of strength. In that case, a distance is provided to insulate the power supply terminal 12 and the metal bracket 19 from each other. It was necessary to increase the opening in the vicinity of the power supply terminal 12, that is, the opening area of the upstream exhaust port 22.

  Therefore, the air sucked by the rotation of the rotary fan 4 is discharged from the upstream exhaust port 22 before cooling the generated field winding 11, armature winding 15, carbon brush, commutator 17, bearing 20 and the like. As a result, the temperature of each part rises, and there is a problem of increasing the risk of occurrence of abnormalities such as premature wear of the carbon brush, deterioration of the roundness of the commutator 17, and early failure due to grease deterioration of the bearing 20. It was.

  This invention solves the said conventional subject, and it aims at providing the electric blower and vacuum cleaner which reduced temperature rise and improved reliability.

In order to solve the conventional problems, an electric blower of the present invention includes a field core, a field winding wound on a winding frame attached to both end faces of the field core, and the winding A field assembly having a terminal block for inserting a power supply terminal disposed and connected to an end of the field winding, and an armature core disposed inside the field core and housing the armature winding in a slot An armature assembly having an output shaft in the center, a substantially cylindrical bracket housing the field assembly and the armature assembly, and a rotary fan fixed to the output shaft And an electric blower comprising a diffuser having a plurality of fixed blades positioned in the outer peripheral direction of the rotary fan, the power supply terminal and the terminal block are disposed on an end face of the field core on the rotary fan side. In the vicinity of the power supply terminal of the bracket Serial rotary fan has an opening for discharging the air sucked from, and those having a wall portion narrowing the ventilation cross-section of the winding to the arranged side of the terminal block on frame the opening discharge from the opening The amount of air discharged is reduced, the amount of air that cools the heat generating components inside the electric blower is increased, and the risk of component abnormality due to temperature can be reduced. Moreover, since the terminal block and the wall surface can be formed integrally, the assembly of the electric blower is facilitated.

  The electric blower of the present invention includes a field core, a field winding wound on a winding frame attached to both end faces of the field core, and a field winding disposed on the winding frame. A field assembly having a terminal block for inserting a power supply terminal connected to an end portion, and an armature core disposed inside the field core and accommodating an armature winding in a slot is constituted by a laminated core and is formed in the center. Is an armature assembly having an output shaft, a substantially cylindrical bracket housing the field assembly and the armature assembly, a rotating fan fixed to the output shaft, and an outer peripheral direction of the rotating fan In the electric blower composed of a diffuser having a plurality of fixed wings, the power supply terminal and the terminal block are disposed on an end face of the field core on the rotating fan side, and near the power supply terminal of the bracket The power terminal and external lead And a plurality of the fixed blades having a closed path through which air sucked from the rotary fan does not flow, and the openings are disposed in the closed path. In addition, it is difficult to discharge air from the opening, and the risk of component abnormality due to temperature can be reduced.

The vacuum cleaner of the present invention uses the electric blower according to any one of claims 1 to 3 , and can realize a highly reliable and long-life vacuum cleaner.

  The electric blower of the present invention can improve the cooling effect and improve the reliability. By mounting the electric blower on the electric vacuum cleaner, a highly reliable electric vacuum cleaner can be provided.

External view of electric blower in Embodiment 1 of the present invention Enlarged view of the vicinity of the power supply terminal of the electric blower Internal structure diagram of field assembly and bracket of the electric blower The internal block diagram of the field assembly and bracket of the electric blower in Embodiment 2 of this invention The internal block diagram of the field assembly of an electric blower, bracket, and diffuser in Embodiment 3 of this invention The block diagram of the vacuum cleaner in Embodiment 4 of this invention Half sectional view of a conventional electric blower

A first invention is a field core, a field winding wound on a winding frame attached to both end faces of the field core, and an end portion of the field winding arranged on the winding frame. A field assembly having a terminal block for inserting a connected power supply terminal, and an armature core disposed inside the field core and accommodating an armature winding in a slot are constituted by a laminated core, and an output shaft is provided at the center. An armature assembly having a substantially cylindrical bracket housing the field assembly and the armature assembly, a rotary fan fixed to the output shaft, and an outer peripheral direction of the rotary fan. In the electric blower comprising a diffuser having a plurality of fixed blades, the power supply terminal and the terminal block are disposed on an end face of the field core on the rotary fan side, and the bracket is near the power supply terminal. Exhaust air sucked from the rotating fan It has a mouth, and those having a wall portion narrowing the ventilation cross-section of the said on spool to arranged side of the terminal block opening, becomes the discharge amount of the air discharged from the opening is reduced The amount of air that cools the heat generating components inside the electric blower increases, and the risk of component abnormality due to temperature can be reduced. Moreover, since the terminal block and the wall surface can be formed integrally, the assembly of the electric blower is facilitated.

In the second invention, in particular, the wall surface portion of the first invention is projected from the opening of the bracket to the outside, and the electrical insulation distance between the power supply terminal and the opening provided in the bracket can be increased. . In addition, since the opening area of the opening is reduced, the amount of air discharged from the opening is further reduced, the amount of air that cools the heat generating components inside the motor is increased, and the risk of component abnormality due to temperature is further reduced. Can be reduced.

According to a third aspect of the present invention, there is provided a field core, a field winding wound on a winding frame attached to both end faces of the field core, and an end of the field winding disposed on the winding frame. A field assembly having a terminal block for inserting a connected power supply terminal, and an armature core disposed inside the field core and accommodating an armature winding in a slot are constituted by a laminated core, and an output shaft is provided at the center. An armature assembly having a substantially cylindrical bracket housing the field assembly and the armature assembly, a rotary fan fixed to the output shaft, and an outer peripheral direction of the rotary fan. In the electric blower composed of a diffuser having a plurality of fixed wings, the power supply terminal and the terminal block are disposed on an end surface of the field core on the rotary fan side, and near the power supply terminal of the bracket, To connect the power supply terminal and external lead wire And a plurality of the fixed wings of the plurality of fixed blades are closed paths through which the air sucked from the rotary fan does not flow, and the openings are arranged in the closed paths. The structure is such that air is hardly discharged, and the risk of component abnormality due to temperature can be reduced.

Vacuum cleaner according to the fourth invention, which uses the electric blower according to any one of claims 1 to 3, it is possible to realize a highly reliable long life electric vacuum cleaner.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is an external view of an electric blower according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view of a vicinity of a power supply terminal of the electric blower, and FIG. 3 is an inside of a field assembly and a bracket of the electric blower. It is a block diagram. In addition, the same code | symbol is attached | subjected about the same component as the said conventional electric blower, and the description is abbreviate | omitted.

  1 to 3, the electric blower 1 according to the present embodiment includes an electric motor 2, a rotating fan 4 having a plurality of blades provided at one end of a shaft 3 that is an output shaft of the electric motor 2, and a rotating fan 4. A diffuser 6 having a plurality of fixed wings 5 that rectifies the wind discharged from the rotary fan 4 located on the outer periphery, and a fan case 8 that covers the rotary fan 4 and the diffuser 6 and has an air inlet 7 in the center.

  In the electric motor 2, an insulating material between the field iron core 9 and the field winding 11 and a winding frame 10 serving as a base for winding the winding are mounted on a field iron core 9 formed by laminating a plurality of electromagnetic steel plates. The field winding 11 is wound around the winding frame 10, one end of the field winding 11 is connected to the carbon brush, the other end is connected to the power supply terminal 12, and the power supply terminal 12 is provided in the winding frame 10. And the armature core 16 that is arranged inside the field assembly 14 and that houses the armature winding 15 in a slot (not shown). Is composed of a laminated iron core, and has an armature assembly 18 having a shaft 3 as an output shaft and a commutator 17 provided at one end of the shaft 3 at the center, and the field assembly 14 rotates on the side of the power supply terminal 12. A substantially cylindrical bracket having a flange portion 19a on the fan 4 side Is press-fitted to the inner wall of the bets 19, armature assembly 18 is held to the bracket 19 so as to be rotatable via a bearing 20.

  Further, the bracket 19 is provided with an exhaust port as an outlet for air sucked from the intake port 7, and an exhaust port provided on the counter-rotating fan 4 side from the field iron core 9 is a downstream exhaust port 21.

  In the present embodiment, an opening window for supplying power by connecting the power supply terminal 12 to an external lead wire or the like is necessary, and the opening is located near the power supply terminal 12 and closer to the rotary fan 4 than the field core 9. This portion is an upstream exhaust port 22. Further, a wall surface portion 23 that narrows the ventilation cross section of the upstream exhaust port 22 is provided in the vicinity of the terminal block 13 of the reel 10.

  The operation and action of the electric blower in the present embodiment configured as described above are as follows.

When the electric blower 1 is operated, the electric motor 2 is supplied with voltage from the power supply terminal 12 and is energized in the order of the field winding 11, the carbon brush, the commutator 17, and the armature winding 15. 11 and the magnetic field generated by the armature winding 15 move the rotational position of the armature assembly 18. Even if the rotational position of the armature assembly 18 is moved, the commutator 17 and the carbon brush are always in contact with each other. The electric motor 2 operates so that the rotation continues.

  Due to the centrifugal force generated by the rotation of the rotary fan 4 connected to the shaft 3 in conjunction with this operation, the internal pressure of the rotary fan 4 becomes negative with respect to the external air pressure and sucks wind.

  The sucked air enters the electric blower 1 through the air inlet 7 of the fan case 8 and passes through the rotary fan 4, the diffuser 6, and the bracket 19 of the electric motor 2, and the field assembly 14, the armature assembly 18, While cooling the carbon brush, the bearing 20 and the like, the air is finally discharged from the downstream exhaust port 21 to the outside of the electric blower 1.

  A part of the air passes through the rotary fan 4 and the diffuser 6 and is directly discharged from the upstream exhaust port 22 to the outside of the electric blower 1.

  In particular, in the present embodiment, due to the presence of the wall surface portion 23, the amount of air discharged from the upstream exhaust port 22 decreases, the amount of air that cools the heat generating components inside the electric motor 2 increases, and the temperature originates. Can reduce the risk of component abnormalities.

  In the above embodiment, the wall surface portion 23 is provided in the vicinity of the terminal block 13 of the reel 10, but the wall surface portion 23 may be provided integrally on the side surface of the terminal block 13, thereby assembling the electric blower 1. It becomes easy.

(Embodiment 2)
FIG. 4 is an internal configuration diagram of the field assembly and bracket of the electric blower according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected about the same component as the said conventional electric blower and the electric blower in Embodiment 1, and the description is abbreviate | omitted.

  As shown in FIG. 4, in the electric blower 1 in the present embodiment, a protruding wall surface portion 24 that protrudes from the upstream exhaust port 22 to the outside of the bracket 19 is provided on the reel 10, and the other configuration is as described above. It is the same as electric blower 1 in the first embodiment.

  Since the electric blower according to the present embodiment is configured as described above, an insulator by the projecting wall surface portion 24 is interposed between the power supply terminal 12 and the upstream exhaust port 22, and the power supply terminal 12 and the upstream exhaust are disposed. The electrical insulation distance between the end face of the mouth 22 can be increased. Further, the projecting wall portion 24 reduces the opening area of the upstream exhaust port 22, further reduces the amount of air discharged from the upstream exhaust port 22, and increases the amount of air that cools the heat generating components inside the electric motor 2. The risk of component abnormality due to temperature can be further reduced.

(Embodiment 3)
FIG. 5 is an internal configuration diagram of the field assembly, bracket, and diffuser of the electric blower according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected about the same component as the electric blower in the said embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 5, the electric blower 1 in the present embodiment has a plurality of fixed blades 5 of the diffuser 6 as a closed path 25 in which air sucked from the rotary fan 4 does not flow, and the upstream exhaust port 22. Are arranged in the closed path 25. As a result, it is difficult for air to be discharged from the upstream exhaust port 22, and the risk of component abnormality due to temperature can be reduced.

(Embodiment 4)
FIG. 6 is a configuration diagram of the electric vacuum cleaner according to Embodiment 4 of the present invention. In addition, the same code | symbol is attached | subjected about the same component as the electric blower in the said embodiment, and the description is abbreviate | omitted.

  In FIG. 6, the vacuum cleaner in the present embodiment includes a vacuum cleaner body 50, a hose 51 that communicates with the vacuum cleaner body 50, an extension pipe 52 that communicates with one end of the hose 51, and an end of the extension pipe 52. The operation handle 53 provided and the floor suction tool 54 communicated with the other end of the extension pipe 52 are provided. The electric blower 1 for generating a suction force is built in the cleaner body 50. A dust collection chamber 55 for storing the sucked dust is provided on the upstream side. The electric blower 1 uses the electric blower 1 shown in any of the first to third embodiments.

  The operation of the vacuum cleaner in the present embodiment configured as described above will be described. When the user starts the operation of the vacuum cleaner with the operation handle 53, a suction force is generated from the electric blower 1, Dust is sucked from the floor suction tool 54 that moves the floor surface. The sucked dust flows together with the air through the extension pipe 52 and the hose 51 to the dust collecting chamber 55. The dust collecting chamber 55 separates the dust from the air, and the dust is stored in the dust collecting chamber 55. Sucks. The air sucked by the electric blower 1 passes through the electric blower 1, passes through the cleaner main body 50, and is discharged outside the cleaner main body 50.

  As described above, since the electric vacuum cleaner in the present embodiment is equipped with the electric blower 1 in which the reliability of components is high due to the high internal cooling efficiency, the life of the electric vacuum cleaner itself can be extended. Can be realized.

  As described above, since the electric blower according to the present invention and the vacuum cleaner using the electric blower can improve the reliability of the electric blower, the electric blower is also used for improving the reliability of household electric appliances, industrial equipment, etc. using the electric blower. Widely applicable.

1 Electric blower 2 Electric motor 3 Shaft (output shaft)
DESCRIPTION OF SYMBOLS 4 Rotating fan 5 Fixed blade 6 Diffuser 7 Air inlet 8 Fan case 9 Field core 10 Winding frame 11 Field winding 12 Power supply terminal 13 Terminal block 14 Field assembly 15 Armature winding 16 Armature core 17 Commutator 18 Armature assembly 19 Bracket 20 Bearing 21 Downstream exhaust port 22 Upstream exhaust port (opening)
23 Wall part 24 Projecting wall part (Wall part)
25 Closed path 50 Vacuum cleaner body 51 Hose 52 Extension pipe 53 Operation handle 54 Floor suction tool 55 Dust collection chamber

Claims (4)

Insert a field core and a field winding wound on a winding frame attached to both end faces of the field core and a power supply terminal disposed on the winding frame and connected to the end of the field winding. A field assembly having a terminal block and an armature core disposed inside the field core and accommodating an armature winding in a slot is formed of a laminated core and has an output shaft in the center. A substantially cylindrical bracket housing the field assembly and the armature assembly, a rotating fan fixed to the output shaft, and a plurality of fixed blades positioned in the outer peripheral direction of the rotating fan. In the electric blower comprising the diffuser, the power supply terminal and the terminal block are disposed on the end face of the field core on the rotary fan side, and the air sucked from the rotary fan is near the power supply terminal of the bracket. Has an opening for discharging, One said electric blower, characterized in that it comprises a wall portion around the arranged side of the terminal block on the frame narrowing the ventilation cross-section of the opening. The electric blower according to claim 1, wherein the wall surface portion is protruded to the outside from the opening portion of the bracket. Insert a field core and a field winding wound on a winding frame attached to both end faces of the field core and a power supply terminal disposed on the winding frame and connected to the end of the field winding. A field assembly having a terminal block and an armature core disposed inside the field core and accommodating an armature winding in a slot is formed of a laminated core and has an output shaft in the center. A substantially cylindrical bracket housing the field assembly and the armature assembly, a rotating fan fixed to the output shaft, and a plurality of fixed blades positioned in the outer peripheral direction of the rotating fan. In the electric blower comprising the diffuser, the power supply terminal and the terminal block are disposed on the end face of the field core on the rotary fan side, and the power supply terminal and the external lead are disposed near the power supply terminal of the bracket. Has an opening to connect the wires And among the plurality of fixed blades, a closed path of air sucked a plurality of said rotating fan does not flow, electric blower, characterized in that a said opening in said closed path inside. The vacuum cleaner using the electric blower of any one of Claims 1-3 .

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