EP3306104A1 - Blower apparatus and vacuum cleaner - Google Patents
Blower apparatus and vacuum cleaner Download PDFInfo
- Publication number
- EP3306104A1 EP3306104A1 EP16803132.6A EP16803132A EP3306104A1 EP 3306104 A1 EP3306104 A1 EP 3306104A1 EP 16803132 A EP16803132 A EP 16803132A EP 3306104 A1 EP3306104 A1 EP 3306104A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- stator blade
- disposed
- stator
- motor housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
Definitions
- the upper end portion of the through hole 21a is located higher than the lower end portion of a stator core 41, described below.
- lower portion of the stator core 41 is exposed to the outside of the housing 20.
- the radially outer side of the stator core 41 thus faces an air-discharge passage 87, disposed between the motor 10 and a passage member 61.
- the air-discharge passage 87 is described below. This structure can cool the stator core 41 with air flowing through the air-discharge passage 87.
- the holding member body 62c includes a holding cylinder 62d and an inner protrusion 64.
- the bearing holding member 60 includes a holding cylinder 62d and an inner protrusion 64.
- the holding cylinder 62d is located at the center portion of the holding member body 62c.
- the holding cylinder 62d is a cylinder that is open at both ends in the axial direction and has the center axis J at the center.
- the holding cylinder 62d is a cylinder that holds the upper bearing 52b.
- the bearing holding member 60 is constituted of multiple holding member pieces 60a arranged in the circumferential direction.
- This structure enables an accurate adjustment of the balance of rotation of a rotor assembly 11, illustrated in Fig. 4 .
- the rotor assembly 11 is constituted of the impeller 70 fixed to the rotor 30 to which the upper bearing 52b attached.
- the structure is described in detail.
- the lower end portion of the internal cylinder 71c is located lower than the disc portion 71a.
- the lower end portion of the internal cylinder 71c overlaps the bearing holding member 60 in the radial direction.
- the portion of the internal cylinder 71c into which the shaft 31 is pressed is located lower than the disc portion 71a.
- the lower end portion of the internal cylinder 71c is in contact with the upper end portion of a shaft washer of the upper bearing 52b.
Abstract
Description
- The present invention relates to a blower and a vacuum cleaner.
- Existing examples of a blower installed in a vacuum cleaner known thus far include multiple stator blades. Examples of such a blower include a blower disclosed in Japanese Unexamined Patent Application Publication No.
2002-138996 2002-138996 - PTL 1: Japanese Unexamined Patent Application Publication No.
2002-138996 - However, in the electric blower disclosed in Japanese Unexamined Patent Application Publication No.
2002-138996 - The present invention aims to provide a blower in which stator blades disposed on either one of the motor housing and a passage member are firmly fixed to the other one of the motor housing and the passage member.
- A blower according to an exemplarily embodiment of the present invention includes a motor that includes a shaft disposed along a center axis extending vertically; an impeller that is connected to the shaft and rotates integrally with the shaft; an impeller housing that is disposed on an upper side of the impeller or a radially outer side of the impeller; a motor housing that is disposed on a radially outer side of the motor; a passage member that is disposed on a radially outer side of the motor housing with a gap interposed therebetween; and a plurality of stator blades that are arranged in a circumferential direction in the gap between the motor housing and the passage member. At least one of the stator blades includes a first stator blade disposed on either one of the motor housing and the passage member, and a second stator blade disposed on the other one of the motor housing and the passage member. The first stator blade and the second stator blade are coupled together in a radial direction or an axial direction.
- The present invention can provide a blower including stator blades disposed on either one of a motor housing and a passage member and allowed to be firmly fixed to the other one of the motor housing and the passage member. In addition, in a vacuum cleaner including the blower, stator blades disposed on either one of a motor housing and a passage member are allowed to be firmly fixed to the other one of the motor housing and the passage member.
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- [
Fig. 1] Fig. 1 is a sectional view of a blower according to a first embodiment. - [
Fig. 2] Fig. 2 is a perspective view of the blower according to the first embodiment. - [
Fig. 3] Fig. 3 is a perspective view of a rotor assembly according to the first embodiment. - [
Fig. 4] Fig. 4 is a front view of a bearing holding member according to the first embodiment. - [
Fig. 5] Fig. 5 is an enlarged sectional view of a portion of the blower according to the first embodiment. - [
Fig. 6] Fig. 6 is a sectional view of a blower according to a second embodiment, taken along line VI-VI inFig. 8 . - [
Fig. 7] Fig. 7 is a perspective view of the blower according to the second embodiment. - [
Fig. 8] Fig. 8 is a plan view of the blower according to the second embodiment. - [
Fig. 9] Fig. 9 is a sectional view of a blower according to a third embodiment. - [
Fig. 10] Fig. 10 is a perspective view of a motor housing according to the third embodiment. - [
Fig. 11] Fig. 11 is a bottom view of a passage member according to the third embodiment. - [
Fig. 12] Fig. 12 is a side view of a stator blade according to a fourth embodiment. - [
Fig. 13] Fig. 13 is a side view of a stator blade according to a fifth embodiment. - [
Fig. 14] Fig. 14 is a side view of a stator blade according to a sixth embodiment. - [
Fig. 15] Fig. 15 is a perspective view of a vacuum cleaner according to an embodiment. - Hereinbelow, blowers according to embodiments of the present invention are described with reference to the drawings. The scope of the present invention is not limited to the following embodiments and are appropriately modifiable within the technical scope of the present invention. For ease of understanding, components in some drawings described below may be different from the actual ones in terms of, for example, scales or numbers.
- The drawings appropriately illustrate a XYZ coordinate system as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z axis direction is parallel to the axial direction of the center axis J illustrated in
Fig. 1 . The Y axis direction is perpendicular to the Z axis direction, and the left-right direction inFig. 1 . The X axis direction is perpendicular to both Y axis direction and Z axis direction. - In the following description, the direction in which the center axis J extends (Z axis direction) is the vertical direction. The positive side of the Z axis direction (+Z side) is referred to as an "upper side (axially upper side)" and the negative side of the Z axis direction (-Z side) is referred to as a "lower side (axially lower side)". The vertical direction, the upper side, and the lower side are simply used for description and do not limit the actual positional relationship or directions. Unless otherwise noted, the direction parallel to the center axis J (Z axis direction) is simply referred to as an "axial direction", the radial direction from the center axis J are simply referred to as "a radial direction" and the circumferential direction around the center axis J is simply referred to as a "circumferential direction".
- As illustrated in
Fig. 1 andFig. 2 , the blower 1 includes amotor 10, abearing holding member 60, animpeller 70, apassage member 61,multiple stator blades 67, and animpeller housing 80. Thebearing holding member 60 is attached to the upper side (+Z side) of themotor 10. Thepassage member 61 surrounds the radially outer side of themotor 10 in the circumferential direction. Theimpeller housing 80 is attached to the upper side of thepassage member 61. Theimpeller 70 is housed between thebearing holding member 60 and theimpeller housing 80 in the axial direction (Z axis direction). Theimpeller 70 is attached to themotor 10 so as to be rotatable around the center axis J.Fig. 2 does not include the illustrations of thepassage member 61 and theimpeller housing 80. - As illustrated in
Fig. 1 , themotor 10 includes ahousing 20, arotor 30, astator 40, alower bearing 52a, an upper bearing 52b, and aconnector 90. Therotor 30 includes ashaft 31. In this embodiment, the upper bearing 52b corresponds to a bearing. Thus, the blower 1 includes therotor 30, thestator 40, thehousing 20, the bearing, thebearing holding member 60, and theimpeller 70. The lower bearing 52a or both lower bearing 52a and upper bearing 52b may correspond to the bearing. - The
housing 20 is cylindrical and open toward the upper side. Thehousing 20 houses thestator 40. Thehousing 20 houses therotor 30. Thehousing 20 is, for example, a closed-bottomed cylindrical container. Thehousing 20 includes a cylindricalcircumferential wall 21, alower lid portion 22 located at the lower end of thecircumferential wall 21, and alower bearing holder 22b located at a center portion of thelower lid portion 22. Thestator 40 is fixed to the inner surface of thecircumferential wall 21 of thehousing 20. Thelower bearing holder 22b is cylindrical and protrudes to the lower side (-Z side) from the center portion of thelower lid portion 22. Thelower bearing holder 22b holds thelower bearing 52a. - As illustrated in
Fig. 1 andFig. 2 , thehousing 20 has throughholes 21a. Each throughhole 21a extends from a lower portion of thecircumferential wall 21 to thelower lid portion 22. Specifically, the throughholes 21a extend through thecircumferential wall 21 in the radial direction and extend through thelower lid portion 22 in the axial direction (Z axis direction). Although not illustrated, for example, three throughholes 21a are provided to extend in the circumferential direction. - As illustrated in
Fig. 1 , the upper end portion of the throughhole 21a is located higher than the lower end portion of astator core 41, described below. Thus, lower portion of thestator core 41 is exposed to the outside of thehousing 20. The radially outer side of thestator core 41 thus faces an air-discharge passage 87, disposed between themotor 10 and apassage member 61. The air-discharge passage 87 is described below. This structure can cool thestator core 41 with air flowing through the air-discharge passage 87. - An example of a method for cooling the
stator core 41 includes causing air to flow inside thehousing 20. This method, however, causes a loss of air as a result of the components in thehousing 20, such as thestator core 41 and coils 42, serving as a resistance that blocks air flow. This method thus has a problem of reducing the blowing efficiency of the blower 1. - In this embodiment, on the other hand, the outer surface of the
stator core 41 is exposed to the air-discharge passage 87. Thus, thestator core 41 does not serve as a resistance of air flow inside the air-discharge passage 87. This embodiment can thus cool thestator core 41 without reducing the blowing efficiency. - The lower end portion of the through
hole 21a is located substantially the middle of thestator core 41 in the axial direction (Z axis direction). Specifically, in this embodiment, the lower half of thestator core 41 is exposed to the air-discharge passage 87. Thus, thestator core 41 is cooled more efficiently. - As illustrated in
Fig. 1 , therotor 30 includes ashaft 31,rotor magnets 33, a lowermagnet fastening member 32a, and an uppermagnet fastening member 32b. Therotor magnets 33 are cylinders that surround the radially outer side of theshaft 31 around the axis (in the θz direction). The lowermagnet fastening member 32a and the uppermagnet fastening member 32b are cylindrical and have their outer diameters equivalent to that of therotor magnets 33. The lowermagnet fastening member 32a and the uppermagnet fastening member 32b are attached to theshaft 31 while holding therotor magnets 33 therebetween from both sides in the axial direction. The uppermagnet fastening member 32b includes a small-diameter portion 32c at an upper portion in the axial direction (Z axis direction), the small-diameter portion 32c having a smaller diameter than the portion on the lower side (closer to the rotor magnets 33). - The
rotor 30 includes theshaft 31, disposed along the center axis J extending vertically (Z axis direction). Theshaft 31 is supported by thelower bearing 52a and theupper bearing 52b so as to be rotatable around the axis (in the ±θz direction). Specifically, the bearings support theshaft 31 so that theshaft 31 is rotatable. Theimpeller 70 is attached to theshaft 31 at a portion above thebearing holding member 60. InFig. 1 , for example, theimpeller 70 is attached to the upper (+Z) end portion of theshaft 31. - The
stator 40 is located on the radially outer side of therotor 30. Thestator 40 surrounds therotor 30 around the axis (in the θz direction). Thestator 40 includes astator core 41, aninsulator 43, and coils 42. - The
stator core 41 includes a core backportion 41a and multiple (here, three)teeth 41b. The core backportion 41a is ring-shaped around the center axis. Eachtooth 41b extends from the inner circumferential surface of the core backportion 41a toward the radially inner side. Theteeth 41b are equidistantly arranged in the circumferential direction. - The
insulator 43 is attached to theteeth 41b. Thecoils 42 are attached to theteeth 41b with theinsulator 43 interposed therebetween. Eachcoil 42 is a wound electric wire. - The
lower bearing 52a is held by thelower bearing holder 22b with theelastic member 53a interposed therebetween. Theupper bearing 52b is held by the holdingcylinder 62d with theelastic member 53b interposed therebetween. Theelastic members rotor 30. - The
elastic members elastic members elastic members - The
elastic member 53a is located on the inner side, in the radial direction, of thelower bearing holder 22b. For example, theelastic member 53a is fitted into a radially inner side of thelower bearing holder 22b. Thelower bearing 52a is fitted into a radially inner side of theelastic member 53a. Theelastic member 53b is located on the inner side, in the radial direction, of the holdingcylinder 62d. For example, theelastic member 53b is fitted into the radially inner side of the holdingcylinder 62d. Theupper bearing 52b is fitted into a radially inner side of theelastic member 53b. - The
bearing holding member 60 is located at an upper opening of thehousing 20. Thebearing holding member 60 is cylindrical and surrounds and holds theupper bearing 52b in the circumferential direction. As illustrated inFig. 3 , thebearing holding member 60 includes a holdingmember body 62c, afirst protrusion 62a, and asecond protrusion 62b. - As illustrated in
Fig. 1 andFig. 2 , the holdingmember body 62c is, for example, a closed-top cylinder having the center axis J at the center. An upper lid portion of the holdingmember body 62c has a hole through which theshaft 31 extends. As illustrated inFig. 1 , the holdingmember body 62c is fitted to the inner side of thecircumferential wall 21 of thehousing 20. Thebearing holding member 60 is thus fixed to the inner side of thehousing 20. - As illustrated in
Fig. 1 andFig. 3 , the holdingmember body 62c includes anouter protrusion 63, which protrudes outward in the radial direction. Specifically, thebearing holding member 60 includes anouter protrusion 63. InFig. 1 andFig. 3 , theouter protrusion 63 is annular to surround the center axis J. With the presence of theouter protrusion 63, the holdingmember body 62c has, on its outer circumferential surface, a step at which the outer diameter of the holdingmember body 62c increases from the lower side to the upper side. The undersurface of theouter protrusion 63 is in contact with the upper end surface of thehousing 20. More specifically, the undersurface of theouter protrusion 63, that is, a stepped surface of the holdingmember body 62c, perpendicular to the axial direction of the step, is in contact with the upper end surface of thehousing 20, that is, the upper end portion of thecircumferential wall 21. Thus, the holdingmember body 62c (bearing holding member 60) has its position fixed in the axial direction. - As illustrated in
Fig. 1 , the holdingmember body 62c includes a holdingcylinder 62d and aninner protrusion 64. Specifically, thebearing holding member 60 includes a holdingcylinder 62d and aninner protrusion 64. The holdingcylinder 62d is located at the center portion of the holdingmember body 62c. The holdingcylinder 62d is a cylinder that is open at both ends in the axial direction and has the center axis J at the center. The holdingcylinder 62d is a cylinder that holds theupper bearing 52b. - The
inner protrusion 64 protrudes inward in the radial direction from the inner surface of the holdingcylinder 62d. InFig. 1 , theinner protrusion 64 protrudes from the upper end portion of the holdingcylinder 62d. As illustrated inFig. 1 andFig. 3 , the upper surface of theinner protrusion 64 is located flush with the upper surface of the holdingcylinder 62d. - As illustrated in
Fig. 1 , theinner protrusion 64 faces at least part of the upper surface of theupper bearing 52b in the axial direction. Thus, when the upper surface of theupper bearing 52b is directly or indirectly brought into contact with theinner protrusion 64, theupper bearing 52b can have its position fixed in the axial direction. InFig. 1 , the upper surface of theupper bearing 52b is indirectly brought into contact with theinner protrusion 64 with theelastic member 53b interposed therebetween. - The radially inner end of the
inner protrusion 64 is located on the inner side, in the radial direction, of the radially outer end of therotor 30. In other words, the distance in the radial direction from the center axis J to the radially outer end of therotor 30 is larger than the distance in the radial direction from the center axis J to the radially inner end of theinner protrusion 64. Thus, the outer diameter of therotor 30 can be easily increased and themotor 10 can increase the output. The radially outer end of therotor 30 is, for example, the radially inner end of therotor magnet 33. - The
first protrusion 62a protrudes upward from the upper surface of the holdingmember body 62c. Thefirst protrusion 62a is annular to surround the center axis J in the circumferential direction. For example, the center axis J passes through the center of thefirst protrusion 62a. - The
second protrusion 62b protrudes upward from the upper surface of the holdingmember body 62c. Specifically, thefirst protrusion 62a and thesecond protrusion 62b protrude upward from the upper surface of the holdingmember body 62c. Thesecond protrusion 62b is located on the outer side, in the radial direction, of thefirst protrusion 62a. Thesecond protrusion 62b is annular to surround the center axis J and thefirst protrusion 62a in the circumferential direction. For example, the center axis J passes through the center of thesecond protrusion 62b. Specifically, thefirst protrusion 62a and thesecond protrusion 62b are annular to surround the center axis J. - In this embodiment, the
bearing holding member 60 is constituted of multiple holdingmember pieces 60a arranged in the circumferential direction. This structure enables an accurate adjustment of the balance of rotation of arotor assembly 11, illustrated inFig. 4 . As illustrated inFig. 4 , therotor assembly 11 is constituted of theimpeller 70 fixed to therotor 30 to which theupper bearing 52b attached. Hereinbelow, the structure is described in detail. - The balance of rotation of the
rotor assembly 11 is generally adjusted by separately adjusting the balance of therotor 30 and the balance of theimpeller 70. Thereafter, themotor 10 including therotor 30 is assembled to fix theimpeller 70 to theshaft 31 of therotor 30. Here, due to assembly errors resulting from fixing theimpeller 70 to theshaft 31, the balance of therotor assembly 11 is adjusted again in the state where theimpeller 70 is fixed to theshaft 31, that is, in the state of therotor assembly 11. To date, the balance adjustment has been required multiple times to adjust the rotation balance of therotor assembly 11, which takes time and trouble. - The balance of the
rotor assembly 11 is adjusted by, for example, cutting off a portion of a component of therotor assembly 11. Here, in the above-described existing method, theimpeller 70 is attached to theshaft 31 after themotor 10 is assembled. In the state where therotor assembly 11 is assembled, therotor 30 is surrounded by thestator 40 and thehousing 20. Thus, the balance of therotor assembly 11 can be adjusted by only cutting off theimpeller 70, not by cutting off part of therotor 30. Specifically, the existing method allows the balance adjustment of therotor assembly 11 only at one surface. This method fails to accurately adjust the rotation balance of therotor assembly 11 depending on how the balance of therotor assembly 11 is disturbed. - On the other hand, in this embodiment, the
bearing holding member 60 is constituted of multiple holdingmember pieces 60a. Thus, after therotor assembly 11 illustrated inFig. 4 is assembled, therotor assembly 11 is inserted into thestator 40, and then the holdingmember pieces 60a are assembled from the radially outer side of theupper bearing 52b to assemble themotor 10. Thus, the balance of therotor assembly 11 can be adjusted before themotor 10 is assembled. This structure enables adjustment of the balance by cutting off both therotor 30 and theimpeller 70. Specifically, the balance of therotor assembly 11 can be adjusted at two or more surfaces. Thus, in this embodiment, the rotation balance of therotor assembly 11 can be highly accurately adjusted. - Since the rotation balance of the
rotor assembly 11 can thus be adjusted highly accurately, the balance of therotor 30 and theimpeller 70 does not need to be adjusted separately. Thus, the number of balance adjustment of therotor assembly 11 can be reduced to one. This embodiment can thus reduce the time and trouble taken to adjust the rotation balance of therotor assembly 11. - Since the
bearing holding member 60 is constituted of multiple holdingmember pieces 60a, the holdingmember pieces 60a need to be kept in the assembled state. Here, in this embodiment, thebearing holding member 60 is fixed to the inner side of thehousing 20. The holdingmember pieces 60a can be combined together, for example, by fitting thebearing holding member 60 to thehousing 20. In this case, the holdingmember pieces 60a can be kept being combined together without being fixed using, for example, an adhesive. This structure thus requires less time and trouble to combine the holdingmember pieces 60a together. - For example, as in this embodiment, in the case where the
bearing holding member 60 is constituted of multiple holdingmember pieces 60a, the holdingmember pieces 60a are more likely to have dimensional errors and assembly errors. Thus, compared to thebearing holding member 60 constituted of a single component, thebearing holding member 60 is more likely to have large dimensional errors in the holdingcylinder 62d. Due to such dimensional errors, the holdingcylinder 62d may fail to stably hold theupper bearing 52b. - On the other hand, according to this embodiment, the
upper bearing 52b is held by the holdingcylinder 62d with theelastic member 53b interposed therebetween. This structure allows theelastic member 53b to absorb dimensional errors of the holdingcylinder 62d, if included. According to this embodiment, thebearing holding member 60 constituted of multiple holdingmember pieces 60a can also stably hold theupper bearing 52b. - In the example of
Fig. 3 , thebearing holding member 60 includes three holdingmember pieces 60a in combination. In this embodiment, the multiple holdingmember pieces 60a have the same shape. Thus, the holdingmember pieces 60a can be easily manufactured. For example, when the holdingmember pieces 60a are manufactured by injection molding using a resin material, the holdingmember pieces 60a can be manufactured using the same mold. Thus, the holdingmember pieces 60a can be manufactured with less time, trouble, and costs. In the example ofFig. 3 , the holdingmember pieces 60a have a sector shape having a central angle of, for example, 120° when viewed in a plan. - As illustrated in
Fig. 1 , aconnector 90 extends downward from thestator 40. Theconnector 90 protrudes to the lower side of thehousing 20 through the throughhole 21a. Theconnector 90 includes a connection wire, not illustrated. The connection wire is electrically connected to thecoils 42. When an external power source, not illustrated, is connected to theconnector 90, power is supplied to thecoils 42 through the connection wires. - The
impeller 70 is fixed to theshaft 31. Theimpeller 70 is rotatable around the center axis J together with theshaft 31. Theimpeller 70 includes abase member 71,rotor blades 73, and ashroud 72. In this embodiment, thebase member 71 is, for example, a single component. Specifically, thebase member 71 is separate from therotor blades 73. Thebase member 71 is made of, for example, a metal. - The
base member 71 is a flat board extending in the radial direction. Specifically, theimpeller 70 includes aflat base member 71 extending in the radial direction. Thebase member 71 faces thebearing holding member 60 in the axial direction with a gap interposed therebetween. Thus, thefirst protrusion 62a, thesecond protrusion 62b, and thebase member 71 can form a labyrinth structure in the axial direction. More specifically, thefirst protrusion 62a, thesecond protrusion 62b, and adisc portion 71a, described below, can form a labyrinth structure between theimpeller 70 and thebearing holding member 60 in the axial direction (in the Z axis direction). This structure can thus prevent air from flowing into the gap between theimpeller 70 and thebearing holding member 60. Thus, the blower 1 according to this embodiment can have high blowing efficiency. - The
base member 71 includes adisc portion 71a, anexternal cylinder 71b, and aninternal cylinder 71c. Although not illustrated, thedisc portion 71a is a disc extending in the radial direction and has its center through which the center axis J passes. Theexternal cylinder 71b is a cylinder extending upward from the inner edge of thedisc portion 71a. Theexternal cylinder 71b has, for example, its center at the center axis J. Theexternal cylinder 71b has its upper end portion curved inward in the radial direction. - Thus, air that has flowed into the
impeller 70 through aninlet port 80a, described below, is more likely to flow outward in the radial direction along the upper surface of theexternal cylinder 71b. Thus, according to this embodiment, the blower 1 can have high blowing efficiency. - The
internal cylinder 71c is located on the inner side, in the radial direction, of theexternal cylinder 71b. Theinternal cylinder 71c is a hollow cylinder extending in the axial direction (in the Z axis direction). Theinternal cylinder 71c has, for example, its center at the center axis J. Theinternal cylinder 71c has its upper end portion curved outward in the radial direction. - The upper end portion of the
internal cylinder 71c is smoothly continuous with the upper end portion of theexternal cylinder 71b. A portion at which a portion of theinternal cylinder 71c above thedisc portion 71a is connected to theexternal cylinder 71b forms a letter U shape, and is open to the lower side in a sectional view. - The
shaft 31 is pressed into the radially inner side of theinternal cylinder 71c. Thus, theimpeller 70 is fixed to theshaft 31. In theimpeller 70 according to this embodiment, theshaft 31 is pressed into the radially inner side of theinternal cylinder 71c to fix theimpeller 70 to theshaft 31 without using a separate fixing member. This structure can thus reduce the number of components of the blower 1. In addition, thedisc portion 71a, theexternal cylinder 71b, and theinternal cylinder 71c are formed of a single component. This structure can further reduce the number of components of the blower 1. Thus, the number of assembly steps of the blower 1 can be reduced. Here, an example of the fixing member that is used to fix theimpeller 70 to theshaft 31 is a nut. - When, for example, the
shaft 31 is pressed into the cylinder extending in the axial direction from the inner edge of thedisc portion 71a, the stress is more likely to be localized at the connection portion between thedisc portion 71a and the cylinder. Thus, theimpeller 70 may swing when receiving a stress from, for example, gyroscopic precession that occurs when theimpeller 70 rotates. - On the other hand, in this embodiment, the
shaft 31 is pressed into theinternal cylinder 71c located on the inner side, in the radial direction, of theexternal cylinder 71b, which extends upward from the inner edge of thedisc portion 71a. This structure can thus prevent the stress from being localized at the connection portion between thedisc portion 71a and theexternal cylinder 71b, and can enhance the solidity of a portion at which thedisc portion 71a, theexternal cylinder 71b, and theinternal cylinder 71c are connected together. This structure can thus prevent theimpeller 70 from swinging when theimpeller 70 receives the stress. - The lower end portion of the
internal cylinder 71c is located lower than thedisc portion 71a. The lower end portion of theinternal cylinder 71c overlaps thebearing holding member 60 in the radial direction. The portion of theinternal cylinder 71c into which theshaft 31 is pressed is located lower than thedisc portion 71a. The lower end portion of theinternal cylinder 71c is in contact with the upper end portion of a shaft washer of theupper bearing 52b. - Thus, the
internal cylinder 71c functions as a spacer that determines the position of thedisc portion 71a in the axial direction (in the Z axis direction). This embodiment can thus reduce the number of components of the blower 1 without the need for disposing a separate spacer and can further reduce the number of assembly steps of the blower 1. - Alternatively, for example, the following structure is conceivable: the
internal cylinder 71c extends upward beyond theexternal cylinder 71b, and the portion of theinternal cylinder 71c into which theshaft 31 is pressed is located higher than thedisc portion 71a. In this case, however, theshaft 31 needs to have a large portion that protrude upward. This structure is thus disadvantageous in that theshaft 31 has a large dimension in the axial direction (in the Z axis direction). - In this embodiment, on the other hand, the
internal cylinder 71c extends downward below thedisc portion 71a. Thus, the portion of theinternal cylinder 71c into which theshaft 31 is pressed can be located below thedisc portion 71a, so that theshaft 31 can have a smaller dimension in the axial direction (in the Z axis direction). - The method for manufacturing the
base member 71 is not limited to a particular one. In this embodiment, thebase member 71 is a single component made of metal and including thedisc portion 71a, theexternal cylinder 71b, and theinternal cylinder 71. For example, thebase member 71 can be manufactured by, for example, performing burring on a metal plate. Theimpeller 70 can be easily manufactured with this method. When thebase member 71 is manufactured from a plate, thebase member 71 can have a lighter weight than in the case where thebase member 71 is manufactured by, for example, die casting. - The
rotor blades 73 are located on the upper surface of thedisc portion 71a. Therotor blades 73 are inserted into, for example, grooves in the upper surface of thedisc portion 71a and fixed to the upper surface of thedisc portion 71a. Themultiple rotor blades 73 are arranged in the circumferential direction. - The
shroud 72 is an annular portion facing the upper surface of thedisc portion 71a. The inner edge of theshroud 72 is concentric with, for example, thedisc portion 71a. Theshroud 72 is fixed to thedisc portion 71a with therotor blades 73 interposed therebetween. - As illustrated in
Fig. 2 , theshroud 72 includes a shroudannular portion 72a and ashroud cylinder portion 72b. The shroudannular portion 72a is an annular plate. Theshroud cylinder portion 72b is a cylinder extending upward from the inner edge of the shroudannular portion 72a. Theshroud cylinder portion 72b includes animpeller opening 72c that is open to the upper side. Theshroud cylinder portion 72b is located on the outer side, in the radial direction, of theexternal cylinder 71b of thebase member 71. - As illustrated in
Fig. 5 , the inner surface of theshroud cylinder portion 72b includes acurved surface 72d. Thecurved surface 72d is located at the upper end portion of the inner surface of theshroud cylinder portion 72b. Thecurved surface 72d is curved outward in the radial direction from the lower side toward the upper side. - An
impeller passage 86 is disposed between the shroudannular portion 72a and thedisc portion 71a in the axial direction (in the Z axis direction). Theimpeller passage 86 is partitioned by themultiple rotor blades 73. Theimpeller passage 86 is connected to theimpeller opening 72c. Theimpeller passage 86 is open to the radially outer side of theimpeller 70. - The
impeller 70 has its position fixed in the axial direction by theinternal cylinder 71c, functioning as a spacer. The undersurface of theimpeller 70, that is, the undersurface of thedisc portion 71a is located adjacent to the upper end of thefirst protrusion 62a of thebearing holding member 60 and the upper end of thesecond protrusion 62b of thebearing holding member 60. Thus, the above-described labyrinth structure is formed. This structure can prevent air discharged from theimpeller passage 86 of theimpeller 70 to the radially outer side from flowing from the outer side toward the radially inner side through the gap between theimpeller 70 and thebearing holding member 60. The blower 1 according to this embodiment can thus have a higher blowing efficiency. - As illustrated in
Fig. 1 , thepassage member 61 is a cylinder that surrounds the radially outer side of themotor 10. Thepassage member 61 has an inner diameter that decreases downward from the upper end portion and increases toward the lower side from the portion having the minimum inner diameter. In other words, a passage memberinner surface 61c of thepassage member 61, which is a radially inner surface, is located further to the radially inner side from the upper end portion toward the lower side, and then located further to the radially outer side toward the lower side from the radially innermost position. - The
passage member 61 has a maximum inner diameter at, for example, the upper end portion. In other words, the passage memberinner surface 61c is located, for example, at the outermost in the radial direction in the upper end portion. - An air-
discharge passage 87 extending in the axial direction (in the Z axis direction) is disposed between thepassage member 61 and themotor 10 in the radial direction. Specifically, thepassage member 61 and themotor 10 define the air-discharge passage 87. The air-discharge passage 87 extends around in the circumferential direction. In this embodiment, the outer surface of themotor 10, that is, the outer circumferential surface of thehousing 20 is a cylinder that extends linearly in the axial direction. Thus, the air-discharge passage 87 has its radial width changed in accordance with the inner diameter of thepassage member 61. - Specifically, the radial width of the air-
discharge passage 87 decreases from the upper end portion toward the lower side, and then increases toward the lower side from the minimum width portion. The air-discharge passage 87 has a maximum radial width at, for example, the upper end portion. When the air-discharge passage 87 has its width changed in this manner, the air flowing through the air-discharge passage 87 can have a higher static pressure. This structure can thus prevent the air flowing through the air-discharge passage 87 from flowing in the reverse direction, that is, from flowing from the lower side to the upper side. - As the radial width of the air-
discharge passage 87 decreases, the air-discharge passage 87 has its position located further to the radially inner side, and as the radial width of the air-discharge passage 87 increases, the air-discharge passage 87 has its position located further to the radially outer side. Here, as the air-discharge passage 87 is located further to the radially inner side, the air-discharge passage 87 has a smaller dimension in the circumferential direction, so that the passage area of the air-discharge passage 87 decreases accordingly. On the other hand, as the air-discharge passage 87 is located further to the radially outer side, the air-discharge passage 87 has a larger dimension in the circumferential direction, so that the passage area of the air-discharge passage 87 increases accordingly. - For example, when the air-
discharge passage 87 having a small radial width has its position located on the outer side in the radial direction, the air-discharge passage 87 has a passage area not sufficiently small, so that the air passing through the air-discharge passage 87 is less likely to have a high static pressure. - In this embodiment, on the other hand, the air-
discharge passage 87 is located further to the radially inner side as the air-discharge passage 87 has a smaller radial width. Thus, the air-discharge passage 87 can have a sufficiently small passage area by reducing the radial width. On the other hand, the air-discharge passage 87 can have a sufficiently large passage area by increasing the radial width. The air-discharge passage 87 can have widely different passage areas, so that the air passing through the air-discharge passage 87 can have a high static pressure. Thus, this embodiment can prevent air flowing through the air-discharge passage 87 from flowing in the reverse direction. - Herein, the position of the air-discharge passage in the radial direction includes the position of the radially outer end of the air-discharge passage in the radial direction.
- An
outlet port 88 is disposed at the lower end portion of the air-discharge passage 87. Theoutlet port 88 is a portion for discharging air that has flowed into the blower 1 from aninlet port 80a, described below. In this embodiment, the position of theoutlet port 88 in the axial direction is substantially the same as the position of the lower end portion of themotor 10 in the axial direction. - In this embodiment, the
passage member 61 includes anupper passage member 61b and a lower passage member 61a. Theupper passage member 61b is connected to the upper side of the lower passage member 61a. Theupper passage member 61b has an inner diameter that decreases from the upper end portion toward the lower side. The lower passage member 61a has an inner diameter that increases from the upper end portion toward the lower side. Specifically, the portion of thepassage member 61 having the minimum inner diameter is located at the same position in the axial direction (Z axis direction) as a coupling position P1, at which theupper passage member 61b and the lower passage member 61a are coupled together. Similarly, the portion of the air-discharge passage 87 having the minimum radial width is located at the same position in the axial direction as the coupling position P1. - The blower 1 includes
multiple stator blades 67. Themultiple stator blades 67 are fixed to the outer surface of thebearing holding member 60. The holdingmember pieces 60a and thestator blades 67 may be integrated together. Themultiple stator blades 67 are disposed between thepassage member 61 and themotor 10 in the radial direction. Specifically, thestator blades 67 are disposed inside the air-discharge passage 87. Thestator blades 67 reorient the air flowing in the air-discharge passage 87. As illustrated inFig. 2 , themultiple stator blades 67 are equidistantly arranged in the circumferential direction. Eachstator blade 67 includes a stator bladelower portion 67a and a stator bladeupper portion 67b. The stator bladelower portion 67a extends in the axial direction (in the Z axis direction). - The stator blade
upper portion 67b is connected to the upper end portion of the stator bladelower portion 67a. The stator bladeupper portion 67b is curved clockwise (-θz direction), when viewed in a plan, from the lower side toward the upper side. - As illustrated in
Fig. 1 , the stator bladelower portions 67a overlap with, for example, the lower passage member 61a in the radial direction. The stator bladeupper portions 67b overlap with, for example, theupper passage member 61b in the radial direction. In this embodiment, each stator bladelower portions 67a and the corresponding stator bladeupper portion 67b are, for example, parts of a single component. In this embodiment, eachstator blade 67 is manufactured as, for example, a single component integrated with theupper passage member 61b. - The
impeller housing 80 is a cylindrical member. Theimpeller housing 80 is attached to the upper end portion of thepassage member 61. Theimpeller housing 80 includes aninlet port 80a that is open to the upper side. - The
impeller housing 80 includes animpeller housing body 82 and aninlet guide 81. Theimpeller housing body 82 is a cylinder that surrounds the radially outer side of theimpeller 70 and is open to both sides in the axial direction. The upper end portion of thepassage member 61 is fitted to the radially inner side of theimpeller housing body 82. In this embodiment, the upper end portion of thepassage member 61 is, for example, pressed into the radially inner side of theimpeller housing body 82. - As illustrated in
Fig. 5 , theimpeller housing body 82 has, at the lower end portion, astep 83 at which the inner diameter of theimpeller housing body 82 increases from the upper side toward the lower side. The upper end surface of thepassage member 61 is in contact with astep surface 83a of thestep 83 that extends perpendicular to the axial direction. Thus, theimpeller housing body 82 has its position fixed in the axial direction (in the Z axis direction) with respect to thepassage member 61. - The inner surface of the
impeller housing body 82 has acurved surface 82a and a shroud-facingsurface 82b. Thecurved surface 82a is a curved surface having an arc-shaped cross section and located further to the radially outer side from the upper side to the lower side. Thecurved surface 82a is steplessly continuous with the passage memberinner surface 61c. Thus, the air flowing over thecurved surface 82a is less likely to cause a loss when flowing into the air-discharge passage 87. Thus, the blower 1 according to this embodiment can have high blowing efficiency. - The
curved surface 82a faces a radially outer opening of theimpeller 70 in the radial direction. Aconnection passage 84, which connects theimpeller passage 86 and the air-discharge passage 87 to each other, is disposed between thecurved surface 82a and theimpeller 70 in the radial direction. - The radial width of the
connection passage 84 increases from the upper side toward the lower side. Specifically, theconnection passage 84 has a maximum radial width at the lower end portion. The lower end portion of theconnection passage 84 is a portion connected to the upper end portion of the air-discharge passage 87. The radial width of the lower end portion of theconnection passage 84 and the radial width of the upper end portion of the air-discharge passage 87 are the same. - As described above, the air-
discharge passage 87 has, at its upper portion, its width decreasing from the upper side toward the lower side. Thus, in the passage from theconnection passage 84 to the upper portion of the air-discharge passage 87, the passage width is maximum at a portion at which theconnection passage 84 and the air-discharge passage 87 are connected together. In other words, at the portion having the maximum width in the passage from theconnection passage 84 to the upper portion of the air-discharge passage 87, thestep 83, which is a connection portion between theimpeller housing 80 and thepassage member 61, is disposed. - The upper end portion P2 of the
curved surface 82a is located higher than the radially outer end portion of the undersurface of the shroudannular portion 72a. Thus, air discharged from theimpeller passage 86 to the outer side of theimpeller 70 in the radial direction does not collide against the upper end portion P2. This structure can thus prevent air from flowing into a gap GA2 in the radial direction between theimpeller housing body 82 and the radially outer end portion of the shroudannular portion 72a. The blower 1 according to this embodiment can thus have high blowing efficiency. - The gap GA2 is smaller than a gap GA3 between the shroud-facing
surface 82b and the outer surface of theshroud 72. The shroud-facingsurface 82b is described below. This structure can prevent air flowing through theconnection passage 84 from flowing into the gap GA3 through the gap GA2. - The upper end portion P2 of the
curved surface 82a is located lower than the radially outer end of the upper surface of the shroudannular portion 72a. Thus, air discharged from theimpeller passage 86 to the radially outer side of theimpeller 70 is more likely to flow over thecurved surface 82a. This structure can thus reduce the loss of air caused when the air flows from theimpeller passage 86 to the air-discharge passage 87 through theconnection passage 84. Thus, the blower 1 according to this embodiment can have high blowing efficiency. - The shroud-facing
surface 82b is a surface facing theshroud 72 of theimpeller 70. The shroud-facingsurface 82b has a contour following the outer surface of theshroud 72. This structure facilitates reduction of the width of the gap GA3 between the shroud-facingsurface 82b and the outer surface of theshroud 72. - If, for example, the gap GA3 has an excessively large width, the pressure inside the gap GA3 would be low, and this structure would allow air to flow into the gap GA3, so that the loss of air would be more likely to increase. On the other hand, in this embodiment, the gap GA3 can have a small width. This structure can prevent air from flowing into the gap GA3, and thus can reduce the loss of air. The gap GA3 has, for example, a substantially uniform width.
- An inlet guide 81 protrudes inward in the radial direction from the inner edge of the upper end portion of the
impeller housing body 82. Theinlet guide 81 is, for example, annular. An upper opening of theinlet guide 81 serves as aninlet port 80a. The radially inner surface of theinlet guide 81 is a curved surface located further to the radially outer side from the lower side toward the upper side. - The
inlet guide 81 is located higher than theshroud cylinder portion 72b. A gap GA1 in the axial direction between theinlet guide 81 and theshroud cylinder portion 72b is smaller than the gap GA3. This structure can thus prevent air flowing from theinlet port 80a into theimpeller 70 from flowing into the gap GA3 through the gap GA1. - The position of the radially inner end portion of the
inlet guide 81 in the radial direction is located at substantially the same as the position of the radially inner end portion of theshroud cylinder portion 72b in the radial direction. Thus, air that has flowed into theimpeller 70 along theinlet guide 81 is more likely to flow along theshroud cylinder portion 72b. This structure can thus reduce the loss of air taken into theimpeller 70. - When the
impeller 70 has its position shifted inward in the radial direction due to, for example, vibrations at a rotation, air flowing from theinlet port 80a along theinlet guide 81 may collide against the upper end portion of theshroud cylinder portion 72b and may be separated. This may increase the loss of air. - In this embodiment, to address this situation, the inner surface of the
shroud cylinder portion 72b has thecurved surface 72d at the upper end portion, as described above. Thus, even when theimpeller 70 has its position shifted in the radial direction, air is more likely to flow downward along thecurved surface 72d. This structure can thus reduce the loss of air. - As illustrated in
Fig. 1 , when theimpeller 70 is rotated by themotor 10, air flows into theimpeller 70 through theinlet port 80a. Air that has flowed into theimpeller 70 is discharged to the radially outer side from theimpeller passage 86. Air discharged from theimpeller passage 86 flows from the upper side toward the lower side through theconnection passage 84 and the air-discharge passage 87 and is discharged downward from theoutlet port 88. In this manner, the blower 1 transports air. - This embodiment can also employ the following structure.
- In this embodiment, the
impeller 70 may be a single component. In this embodiment, thebearing holding member 60 may be constituted of two holdingmember pieces 60a or four or more holdingmember pieces 60a. - The holding
member pieces 60a may have different shapes. Multipleouter protrusions 63 may be arranged in the circumferential direction. -
Fig. 7 andFig. 8 do not illustrate apassage member 161, abearing holding member 160, animpeller 70, and animpeller housing 80. Components the same as those in the first embodiment may be appropriately denoted with the same reference signs and not described. - As illustrated in
Fig. 6 , theblower 2 includes amotor 110, abearing holding member 160, animpeller 70, apassage member 161,multiple stator blades 167, and animpeller housing 80. - The
motor 110 includes ahousing 120, arotor 30, astator 140, alower bearing 52a, anupper bearing 52b, and aconnector 90. Therotor 30 includes ashaft 31. Thehousing 120 includes acircumferential wall 121, alower lid portion 22, and alower bearing holder 22b. - As illustrated in
Fig. 7 , thecircumferential wall 121 has multiple throughholes 121a andmultiple cutouts 121b. As illustrated inFig. 6 , the upper end portion of the throughhole 121a is located lower than astator core 141, described below. Other portions of the throughhole 121a are the same as those of the throughhole 21a according to the first embodiment. - As illustrated in
Fig. 7 , thecutouts 121b are cut portions of thecircumferential wall 121 that are cut from the upper end portion toward the lower side. Specifically, thecutouts 121b extend through thecircumferential wall 121 in the radial direction to open to the upper side. For example, sixcutouts 121b are equidistantly arranged in the circumferential direction. For example, thecutouts 121b are rectangular extending in the axial direction when viewed in the radial direction. - As illustrated in
Fig. 8 , thestator 140 includes astator core 141. Thestator core 141 includes a core backportion 41a,teeth 41b, andcore protrusions 141c. Thecore protrusions 141c protrude from the outer circumferential surface of the core backportion 41a to the radially outer side. For example, sixcore protrusions 141c are arranged in the circumferential direction. - Each
core protrusion 141c is fitted to the corresponding one of thecutouts 121b. The radially outer surface of thecore protrusion 141c is flush with the outer circumferential surface of thehousing 120. The radially outer surface of eachcore protrusion 141c is exposed to the outside of thehousing 120. In this embodiment, themultiple cutouts 121b are equidistantly arranged in the circumferential direction. Thus, on the outer circumferential surface of themotor 110, the outer circumferential surfaces of thecore protrusions 141c and the outer circumferential surface of thehousing 120 are alternately arranged in the circumferential direction. - As illustrated in
Fig. 6 , eachcore protrusion 141c has its radially outer surface facing the air-discharge passage 87. Thus, in this embodiment, thestator core 141 can be cooled by air flowing through the air-discharge passage 87. - Each
core protrusion 141c has its lower end portion in contact with the upper edge of the corresponding one of thecutouts 121b. Thus, thestator core 141 has its position of fixed in the axial direction. - Each
stator blade 167 includes a stator bladelower portion 167a and a stator bladeupper portion 167b. The stator bladelower portion 167a and the stator bladeupper portion 167b are, for example, separate members. The other structure of the stator bladelower portion 167a is similar to the structure of the stator bladelower portion 67a according to the first embodiment. The other structure of the stator bladeupper portion 167b is similar to the structure of the stator bladeupper portion 67b according to the first embodiment. - The
bearing holding member 160 is similar to thebearing holding member 60 according to the first embodiment except having its outer circumferential surface to which each stator bladeupper portion 167b is fixed. Each stator bladeupper portion 167b is fixed to the outer surface of thebearing holding member 160. Each holding member piece and the corresponding one of the stator bladeupper portions 167b are formed as, for example, a single component. In this embodiment, thebearing holding member 160 functions as a diffuser including the stator bladeupper portions 167b serving as stator blades. - The number of the holding member pieces constituting the
bearing holding member 160 is a divisor of the number of the stator bladeupper portions 167b. Specifically, the number of the holding member pieces is a divisor of the number of thestator blades 167. Thus, the holding member pieces can have the same number of the stator bladeupper portions 167b. In the structure where thebearing holding member 160 includes the stator bladeupper portions 167b, the holding member pieces can have the same shape. This structure facilitates manufacturing of the holding member pieces. - For example, when the number of the stator blade
upper portions 167b is 15 and the number of the holding member pieces constituting thebearing holding member 160 is 3, the number of the stator bladeupper portions 167b included in each holding member piece is 5. - In this embodiment, the
passage member 161 is a single component. Each stator bladelower portion 167a is fixed to the inner circumferential surface of thepassage member 161. Thepassage member 161 and the stator bladelower portions 167a are formed as, for example, a single component. The other structure of thepassage member 161 is similar to the structure of thepassage member 61 according to the first embodiment. The other structure of theblower 2 is similar to the structure of the blower 1 according to the first embodiment. - In this embodiment, the number of the
cutouts 121b is not limited to a particular one, and may be five or smaller or seven or larger. In this embodiment, instead of thecutouts 121b, through holes that extend through thecircumferential wall 121 in the radial direction may be formed. - Alternatively, for example, the entirety of the
stator blades 167 each constituted of the stator bladelower portion 167a and the stator bladeupper portion 167b may be integrated with the corresponding one of the holding member pieces constituting thebearing holding member 160. -
Fig. 9 is a sectional view of ablower 3 according to a third embodiment. Theblower 3 includes amotor 210, animpeller 270, animpeller housing 280, amotor housing 260, apassage member 261, andmultiple stator blades 267. Themotor housing 260 is a component corresponding to thebearing holding member 60 according to the first embodiment. Here, anupper bearing 252b may be held by a component other than themotor housing 260. - The
motor 210 includes ashaft 231 vertically extending along the center axis J. Themotor 210 includes arotor 230, astator 240, alower bearing 252a, and theupper bearing 252b. Therotor 230 is disposed on the radially inner side of thestator 240 and connected to theshaft 231. Theshaft 231 is supported by thestator 240 so as to be rotatable around the center axis J with thelower bearing 252a and theupper bearing 252b interposed therebetween. - The
impeller 270 is connected to theshaft 231 and rotates integrally with theshaft 231. Theimpeller housing 280 is disposed on the upper side or the radially outer side of theimpeller 270. In theblower 3, theimpeller housing 280 surrounds the upper side and the radially outer side of theimpeller 270, and includes, at a center portion, aninlet port 280a extending through in the axial direction. - The
motor housing 260 is disposed on the radially outer side of themotor 210. Themotor housing 260 is a substantially cylindrical closed-top component that is open to the lower side. Thepassage member 261 is disposed on the radially outer side of themotor housing 260 with a gap interposed therebetween. Specifically, the radially outer surface of themotor housing 260 and the radially inner surface of thepassage member 261 are disposed while having a gap interposed therebetween in the radial direction. Thus, the gap interposed between themotor housing 260 and thepassage member 261 serves as a passage. - The
multiple stator blades 267 are arranged in the circumferential direction in the gap between themotor housing 260 and thepassage member 261. Themultiple stator blades 267 are located to the radially outer side of the radially outer end of theimpeller 270. The axially upper ends of themultiple stator blades 267 are located to the axially lower side of the axially lower end of theimpeller 270. At least one of themultiple stator blades 267 is constituted of multiple sections. Specifically, at least one of thestator blades 267 includes afirst stator blade 268 and asecond stator blade 269. Thefirst stator blade 268 is disposed on either one of themotor housing 260 and thepassage member 261. Thesecond stator blade 269 is disposed on the other one of themotor housing 260 and thepassage member 261. In this embodiment, themotor housing 260 includes thefirst stator blade 268 on its outer surface, and thepassage member 261 includes thesecond stator blade 269 on its inner surface. - The
first stator blade 268 and thesecond stator blade 269 are connected together in the radial direction or in the axial direction. This structure can firmly fix thefirst stator blade 268 and thesecond stator blade 269 to each other. When thefirst stator blade 268 disposed on themotor housing 260 and thesecond stator blade 269 disposed on thepassage member 261 are fixed together, the radially outer surface of themotor housing 260 and the radially inner surface of thepassage member 261 can be arranged with high concentricity. This structure can further uniform the radial dimension of the passage in the circumferential direction, so that theblower 3 can have high blowing efficiency. -
Fig. 10 is a perspective view of themotor housing 260 according to the third embodiment.Fig. 11 is a bottom view of thepassage member 261 according to the third embodiment. With reference toFig. 9 to Fig. 11 , eachfirst stator blade 268 and eachsecond stator blade 269 respectively include a first connectingportion 268A and a second connectingportion 269A. The first connectingportion 268A is included in eachfirst stator blade 268 and comes into contact with part of the correspondingsecond stator blade 269. The second connectingportion 269A is included in eachsecond stator blade 269 and comes into contact with part of the corresponding first stator blade. At least part of each first connectingportion 268A and at least part of the corresponding second connectingportion 269A are in contact with each other in the axial direction. This structure can fix the positions of eachfirst stator blade 268 and the correspondingsecond stator blade 269 in the axial direction when thefirst stator blade 268 and thesecond stator blade 269 are coupled together. - In addition, at least part of each first connecting
portion 268A and at least part of the corresponding second connectingportion 269A are in contact with each other in the circumferential direction. This structure can fix the positions of eachfirst stator blade 268 and the correspondingsecond stator blade 269 in the circumferential direction when thefirst stator blade 268 and thesecond stator blade 269 are coupled together. Specifically, each first connectingportion 268A and the corresponding second connectingportion 269A are in contact with each other in the axial direction and the circumferential direction, and have their positions determined in the axial direction and the circumferential direction. Eachfirst stator blade 268 and the correspondingsecond stator blade 269, having their positions determined in the axial direction and the circumferential direction, can be fixed to each other without being displaced with respect to each other. - Each first connecting
portion 268A includes aprotrusion 268B extending in the axial direction or the radial direction. Each second connectingportion 269A includes arecess 269B, recessed in the axial direction or the radial direction. In this embodiment, theprotrusion 268B extends to radially lower side from the surface of thefirst stator blade 268 facing the axially lower side at the lower portion of thefirst stator blade 268. Theprotrusion 268B and the surface of thefirst stator blade 268 facing the axially lower side at the lower portion of thefirst stator blade 268 constitute the first connectingportion 268A. Therecess 269B in thesecond stator blade 269 is recessed from the radially inner side to the radially outer side. Therecess 269B and the upper surface of thesecond stator blade 269 constitute the second connectingportion 269A. - A circumferential width W1 of at least part of the
protrusion 268B is smaller than a circumferential width W2 of eachstator blade 267. To assemble theblower 3, themotor housing 260 including thefirst stator blades 268 is moved downward in the axial direction. Eachprotrusion 268B is thus inserted into thecorresponding recess 269B. Thus, eachfirst stator blade 268 and the correspondingsecond stator blade 269 have their positions concurrently restricted in the axial direction and the circumferential direction. This simple structure and assembly process enable firm fixing between eachfirst stator blade 268 and the correspondingsecond stator blade 269, and facilitate the productivity. - In this embodiment, the
first stator blades 268 are located higher than thesecond stator blades 269 in the axial direction. Eachfirst stator blade 268 has afirst side surface 268C, facing rearward in an impeller rotation direction R. Eachsecond stator blade 269 has asecond side surface 269C, facing rearward in the impeller rotation direction R. Thefirst side surface 268C and thesecond side surface 269C are smoothly connected to each other. Specifically, when eachfirst stator blade 268 and the correspondingsecond stator blade 269 are coupled together, thefirst side surface 268C and thesecond side surface 269C form a side surface of one of thestator blades 267 facing rearward in the impeller rotation direction R. Thus, air flowing through the passage is smoothly guided to the axially lower side along thefirst side surface 268C and thesecond side surface 269C, so that theblower 3 has a higher blowing efficiency. The surface of eachstator blade 267 facing forward in the impeller rotation direction R is also constituted of the surface of the correspondingfirst stator blade 268 facing forward in the impeller rotation direction R and the surface of the correspondingsecond stator blade 269 facing forward in the impeller rotation direction R. Thus, theblower 3 has a higher blowing efficiency. - As illustrated in
Fig. 10 , an upper portion of eachfirst side surface 268C is curved forward in the rotation direction R from the upper side to the lower side in the axial direction. More specifically, an upper portion of eachfirst side surface 268C is a surface smoothly curved forward in the impeller rotation direction R and protruding toward the axially upper side. In this structure, air discharged from theimpeller 270 to the radially outer side is smoothly guided to the axially lower side along the curved surface at the upper portion of thefirst side surface 268C while retaining the component circling in the circumferential direction to the front side in the impeller rotation direction R, and then flows to the axially lower side. Thus, theblower 3 has high blowing efficiency. - With reference to
Fig. 9 , in a gap in the axial-direction area A in which eachstator blade 267 is disposed, a gap d1 in the radial direction at the upper end of the axial-direction area A is wider than a gap d2 in the radial direction at the lower end of the axial-direction area A. Specifically, in the axial-direction area A in which thestator blades 267 are disposed, the gap in the radial direction in the passage at the upper end is wider than the gap in the radial direction in the passage at the lower end. Thus, the passage has a small sectional area in the area where thestator blades 267 are disposed, so that the air flowing through the passage has a high static pressure. This structure can thus reduce an occurrence of a turbulence in the axial-direction area A. Thus, air flows through the passage more smoothly, and theblower 3 has high blowing efficiency. - The gap d2 in the radial direction at the lower end of the axial-direction area A is narrower than a gap d3 in the radial direction at a portion below the axial-direction area A in the axial direction, between the outer surface of the
motor housing 260 and the inner surface of thepassage member 261. Specifically, the gap d3 in the radial direction in the passage at a portion below the axial-direction area A in the axial direction is wider than the gap in the radial direction in the passage at the lower portion of the axial-direction area A. Thus, air having its static pressure raised in the axial-direction area A smoothly flows to the axially lower side, since the resistance in the passage gradually decreases as the passage has its sectional area increased at a portion below the axial-direction area A in the axial direction. Thus, theblower 3 has high blowing efficiency. - With reference to
Fig. 11 , themultiple stator blades 267, each having thefirst stator blade 268 and thesecond stator blade 269, are irregularly arranged in the circumferential direction. Specifically, inFig. 11 , at least one of gaps in the circumferential direction between adjacent two of the multiplesecond stator blade 269 differs from the other gaps in the circumferential direction. Similarly, gaps in the circumferential direction between adjacent two of the multiplefirst stator blades 268 are determined in the same manner as those of the multiplesecond stator blades 269. Thus, themotor housing 260 and thepassage member 261 have their positions fixed in the circumferential direction. - In the third embodiment, the
first stator blades 268 are located higher than thesecond stator blades 269. However, thefirst stator blades 268 may be located lower than thesecond stator blades 269. Thefirst stator blades 268 may be disposed on thepassage member 261, instead of themotor housing 260. Theprotrusions 268B may be formed on thesecond stator blades 269. Therecesses 269B may be formed on thefirst stator blades 268. - In the third embodiment, each first connecting
portions 268A and each second connectingportions 269A are respectively constituted of the flat surface substantially perpendicular to the axial direction and theprotrusion 268B that protrudes in the axial direction from the flat surface, and constituted of the flat surface and therecess 269B recessed from the flat surface in the axial direction. However, the first connectingportions 268A and the second connectingportions 269A may have other shapes. For example, the undersurface of each first connectingportion 268A may be a slope that is inclined with respect to the axial direction. - As an example of another structure, the upper end portion of the second connecting
portion 269A may be exposed to the upper side in the axial direction when eachstator blade 267 is viewed from the axially upper side. Specifically, in the third embodiment, the upper end portion of the second connectingportion 269A is in contact with the first connectingportion 268A in the axial direction. Thus, when eachstator blade 267 is viewed from the axially upper side, the second connectingportion 269A is not exposed to the upper side in the axial direction, but may be exposed to the upper side in the axial direction. Alternatively, when viewed from the axially lower side, the lower end portion of the first connectingportion 268A may be exposed to the axially lower side. -
Fig. 12 is a side view ofstator blades 367 according to a fourth embodiment. For convenience purposes, a passage member disposed on the radially outer side is not illustrated.Multiple stator blades 367 are arranged in the circumferential direction. At least one of themultiple stator blades 367 is constituted of multiple sections. Specifically, at least one of thestator blades 367 includes afirst stator blade 368 and asecond stator blade 369. Thefirst stator blade 368 is disposed on either one of amotor housing 360 and the passage member. Thesecond stator blade 369 is disposed on the other one of themotor housing 360 and the passage member. - The
first stator blade 368 and thesecond stator blade 369 respectively include a first connectingportion 368A and a second connectingportion 369A. The first connectingportion 368A and the second connectingportion 369A respectively include a first steppedportion 368E and a second steppedportion 369E extending in the axial direction. The surfaces of the first steppedportion 368E and the second steppedportion 369E facing each other in the axial direction or the circumferential direction are in contact with each other. In the fourth embodiment, the surface of the first steppedportion 368E facing in the axial direction, that is, the undersurface of the first steppedportion 368E is in contact with the surface of the second steppedportion 369E facing in the axial direction, that is, the upper surface of the second steppedportion 369E. In addition, the surface of the first steppedportion 368E facing in the circumferential direction, that is, a side surface of the first steppedportion 368E, is in contact with the surface of the second steppedportion 369E facing in the circumferential direction, that is, a side surface of the second steppedportion 369E. Thus, thefirst stator blade 368 and thesecond stator blade 369 can have their positions fixed in both the axial direction and the circumferential direction. In addition, compared to the structure according to the third embodiment, the structure of the first connectingportion 368A and the second connectingportion 369A can be simplified. Thus, the blower can be assembled with lower costs and simple processes. The surfaces of the first steppedportion 368A and the second steppedportion 369A facing each other in either one of the axial direction and the circumferential direction only have to be in contact with each other, and the surfaces facing each other in both the axial direction and the circumferential direction do not have to be in contact with each other. - The
first stator blade 368 includes afirst side surface 368C facing rearward in the impeller rotation direction R. Thesecond stator blade 369 includes asecond side surface 369C facing rearward in the impeller rotation direction R. In the circumferential direction, alower end portion 368D of the first side surface is located further to the rear side, in the impeller rotation direction R, of theupper end portion 369D of the second side surface. This structure reduces the resistance that the air flowing near the first side surface receives, compared to the case where, in the circumferential direction, thelower end portion 368D of the first side surface is located further to the front side, in the impeller rotation direction R, of theupper end portion 369D of the second side surface. In an assembly process, even when theupper end portion 369D of the second side surface has its position slightly shifted to the rear side in the impeller rotation direction R, theupper end portion 369D of the second side surface is prevented from protruding beyond thefirst side surface 368C to the rear side in the impeller rotation direction R. Desirably, thelower end portion 368D of the first side surface and theupper end portion 369D of the second side surface are located at the same position in the impeller rotation direction R for enhancing the blowing efficiency. -
Fig. 13 is a side view of astator blade 467 according to a fifth embodiment. For convenience purposes,Fig. 13 does not include the illustration of a passage member disposed on the radially outer side of thestator blade 467. A blower according to the fifth embodiment has a structure similar to the structure according to the third embodiment except for thestator blade 467. - The
stator blade 467 is disposed on either one of the motor housing and the passage member. Thestator blade 467 has arecess 468F at an axially lower end portion that is recessed upward in the axial direction. Thestator blade 467 also has a connectingportion 469F disposed on the other one of the motor housing and the passage member. In this embodiment, thestator blade 467 is integrated with the passage member. The connectingportion 469F is integrated with the motor housing. The connectingportion 469F is engaged with at least part of therecess 468F. This structure involving low costs and having high productivity enables firm fixing between thestator blade 467 and the connectingportion 469F. - The
stator blade 467 according to the fifth embodiment is different from thestator blade 267 according to the third embodiment or thestator blade 367 according to the fourth embodiment in terms that the connectingportion 469F does not constitute a side surface of thestator blade 467. Specifically, in thestator blade 467, the side surfaces of thestator blade 467 are formed by only thestator blade 467 integrated with either one of the motor housing and the passage member. The connectingportion 469F constitutes part of the undersurface of thestator blade 467 and is not exposed to other surfaces. In this embodiment, thestator blade 467 is located higher than the connectingportion 469F. However, the stator blade may be located lower than the connecting portion and may include a recess recessed to the lower side in the upper surface of the stator blade. -
Fig. 14 is a side view of astator blade 567 according to a sixth embodiment. For convenience purposes,Fig. 14 does not include the illustration of a passage member disposed to the radially outer side of thestator blade 567. A blower according to the sixth embodiment has a structure similar to the structure according to the third embodiment except for thestator blade 567. - The
stator blade 567 is disposed on either one of the motor housing and the passage member. Thestate blade 567 includes arecess 568F in the surface facing forward in the impeller rotation direction R. Therecess 568F is recessed to the rear side in the impeller rotation direction R. Thestator blade 567 also includes a connectingportion 569F on the other one of the motor housing and the passage member. The connectingportion 569F is engaged with at least part of therecess 568F. In this embodiment, thestator blade 567 is integrated with the motor housing, and the connectingportion 569F is integrated with the passage member. This structure involving low costs and having high productivity enables firm fixing between thestator blade 567 and the connectingportion 569F. - The
stator blade 567 is different from thestator blade 267 according to the third embodiment or thestator blade 367 according to the fourth embodiment in terms that the connectingportion 569F does not constitute a side surface of thestator blade 567. The connectingportion 569F constitutes part of a surface of thestator blade 567 facing forward in the impeller rotation direction R, and is not exposed to other surfaces. Therecess 568F may be formed in the surface facing rearward in the impeller rotation direction R and engaged with the connectingportion 569F. - A
vacuum cleaner 100 illustrated inFig. 15 includes a blower according to the present invention. In the blower installed in the vacuum cleaner, the first stator blade and the second stator blade can be firmly fixed together. - The blower according to each of the first to sixth embodiments may be used in any device. The blower according to each of the first to sixth embodiments may be used in, for example, a vacuum cleaner or a drier.
- The structures described in the first to sixth embodiments may be appropriately combined together within the scope where they are compatible with each other.
-
- 1, 2, 3 blower
- 10, 110, 210 motor
- 20, 120 housing
- 30, 230 rotor
- 31, 231 shaft
- 40, 140, 240 stator
- 52a, 252a lower bearing (bearing)
- 52b, 252b upper bearing (bearing)
- 53b elastic member
- 60, 160, 260, 360 bearing holding member (motor housing)
- 60a holding member piece
- 61, 161, 261 passage member
- 62a first protrusion
- 62b second protrusion
- 62c holding member body
- 62d holding cylinder
- 63 outer protrusion
- 64 inner protrusion
- 67, 167, 267, 367, 467, 567 stator blade
- 268, 368 first stator blade
- 268A, 368A first connecting portion
- 268B protrusion
- 268C, 368C first side surface
- 368D lower end portion of first side surface
- 368E first stepped portion
- 468F, 568F recess
- 269, 369 second stator blade
- 269A, 369A second connecting portion
- 269B recess
- 269C, 369C second side surface
- 369D upper end portion of second side surface
- 369E second stepped portion
- 469F, 569F connecting portion
- 70, 270 impeller
- 71 base member
- 80, 280 impeller housing
- 80a, 280a inlet port
- 100 vacuum cleaner
- 167a stator blade lower portion (stator blade)
- 167b stator blade upper portion (stator blade)
- A axial-direction area
- d1, d2, d3 gap in radial direction
- J center axis
- R impeller rotation direction
- W1, W2 circumferential width
Claims (14)
- A blower, comprising:a motor that includes a shaft disposed along a center axis extending vertically;an impeller that is connected to the shaft and rotates integrally with the shaft;an impeller housing that is disposed on an upper side of the impeller or a radially outer side of the impeller;a motor housing that is disposed on a radially outer side of the motor;a passage member that is disposed on a radially outer side of the motor housing with a gap interposed therebetween; anda plurality of stator blades that are arranged in a circumferential direction in the gap between the motor housing and the passage member,wherein at least one of the stator blades includesa first stator blade disposed on either one of the motor housing and the passage member, anda second stator blade disposed on the other one of the motor housing and the passage member, andwherein the first stator blade and the second stator blade are coupled together in a radial direction or an axial direction.
- The blower according to Claim 1,
wherein the first stator blade and the second stator blade respectively have a first connecting portion and a second connecting portion, and
wherein at least part of the first connecting portion and at least part of the second connecting portion are in contact with each other in the axial direction. - The blower according to Claim 1,
wherein the first stator blade and the second stator blade respectively have a first connecting portion and a second connecting portion, and
wherein at least part of the first connecting portion and at least part of the second connecting portion are in contact with each other in the circumferential direction. - The blower according to Claim 2 or 3,
wherein the first connecting portion includes a protrusion extending in the axial direction or the radial direction,
wherein the second connecting portion includes a recess recessed in the axial direction or the radial direction,
wherein a circumferential width of at least part of the protrusion is smaller than a circumferential width of the stator blade, and
wherein the protrusion is inserted into the recess. - The blower according to Claim 2 or 3,
wherein the first connecting portion and the second connecting portion respectively have a first stepped portion and a second stepped portion extending in the axial direction, and
surfaces of the first stepped portion and the second stepped portion facing each other in the axial direction, or surfaces of the first stepped portion and the second stepped portion facing each other in the circumferential direction are in contact with each other. - The blower according to any one of Claims 1 to 5,
wherein the first stator blade is located to an axially upper side of the second stator blade,
wherein the first stator blade has a first side surface facing to a rear side in a rotation direction of the impeller,
wherein the second stator blade has a second side surface facing to the rear side in the rotation direction of the impeller, and
wherein the first side surface and the second side surface are smoothly connected together. - The blower according to any one of Claims 1 to 5, wherein, in the circumferential direction, a lower end portion of the first side surface is located to a rear side of an upper end portion of the second side surface in the rotation direction of the impeller.
- The blower according to any one of Claims 1 to 7,
wherein the stator blade including the first stator blade and the second stator blade includes a plurality of stator blades arranged irregularly in the circumferential direction. - The blower according to Claim 6 or 7, wherein an upper portion of the first side surface is curved to a front side in the rotation direction from the axially upper side toward an axially lower side.
- The blower according to any one of Claims 1 to 9,
wherein, in the gap of an axial-direction area in which the stator blades are disposed, a gap in the radial direction at an upper end of the axial-direction area is wider than a gap in the radial direction at a lower end of the axial-direction area. - The blower according to Claim 10,
wherein the gap in the radial direction at the lower end of the axial-direction area is narrower than a gap in the radial direction between an outer surface of the motor housing at a portion below the axial-direction area in the axial direction and an inner surface of the passage member. - A blower, comprising:a motor that includes a shaft disposed along a center axis extending vertically;an impeller that is connected to the shaft and rotates integrally with the shaft;an impeller housing that is disposed on an upper side of the impeller or a radially outer side of the impeller;a motor housing that is disposed on a radially outer side of the motor;a passage member that is disposed on a radially outer side of the motor housing with a gap interposed therebetween; anda plurality of stator blades that are arranged in a circumferential direction in the gap between the motor housing and the passage member,wherein the stator blades are disposed on either one of the motor housing and the passage member, and each have a recess recessed to an upper side in an axial direction at an axially lower end portion,wherein a connecting portion is disposed on the other one of the motor housing and the passage member, andwherein the connecting portion is engaged with at least one of the recesses.
- A blower, comprising:a motor that includes a shaft disposed along a center axis extending vertically;an impeller that is connected to the shaft and rotates integrally with the shaft;an impeller housing that is disposed on an upper side of the impeller or a radially outer side of the impeller;a motor housing that is disposed on a radially outer side of the motor;a passage member that is disposed on a radially outer side of the motor housing with a gap interposed therebetween; anda plurality of stator blades that are arranged in a circumferential direction in the gap between the motor housing and the passage member,wherein the stator blades are disposed on either one of the motor housing and the passage member, and each have a recess recessed in the circumferential direction in a surface of the stator blade facing to a front side in a rotation direction of the impeller,wherein a connecting portion is disposed on the other one of the motor housing and the passage member, andwherein the connecting portion is engaged with at least one of the recesses.
- A vacuum cleaner, comprising the blower according to any one of Claims 1 to 13.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562168135P | 2015-05-29 | 2015-05-29 | |
PCT/JP2016/065250 WO2016194697A1 (en) | 2015-05-29 | 2016-05-24 | Blower apparatus and vacuum cleaner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3306104A1 true EP3306104A1 (en) | 2018-04-11 |
EP3306104A4 EP3306104A4 (en) | 2019-02-13 |
Family
ID=57440948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16803132.6A Withdrawn EP3306104A4 (en) | 2015-05-29 | 2016-05-24 | Blower apparatus and vacuum cleaner |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180156233A1 (en) |
EP (1) | EP3306104A4 (en) |
JP (3) | JP2016223432A (en) |
CN (1) | CN107614888B (en) |
WO (1) | WO2016194697A1 (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113007106B (en) | 2011-07-13 | 2023-08-11 | 费雪派克医疗保健有限公司 | Impeller and motor assembly |
CN205515844U (en) | 2012-12-18 | 2016-08-31 | 费雪派克医疗保健有限公司 | Breathe auxiliary device and be used for assembly of motor |
EP3015713A1 (en) * | 2014-10-30 | 2016-05-04 | Nidec Corporation | Blower apparatus |
US20180149158A1 (en) * | 2015-05-14 | 2018-05-31 | Denso Corporation | Centrifugal blower |
JP6718365B2 (en) * | 2016-11-21 | 2020-07-08 | 東芝ライフスタイル株式会社 | Electric blower and vacuum cleaner |
US10641282B2 (en) * | 2016-12-28 | 2020-05-05 | Nidec Corporation | Fan device and vacuum cleaner including the same |
KR101896173B1 (en) | 2017-02-01 | 2018-09-07 | 엘지전자 주식회사 | Fan Motor |
EP3795840B1 (en) | 2017-03-16 | 2023-05-31 | LG Electronics Inc. | Motor fan |
KR101924591B1 (en) * | 2017-03-16 | 2018-12-03 | 엘지전자 주식회사 | Fan motor |
JP2018155237A (en) * | 2017-03-17 | 2018-10-04 | 日本電産株式会社 | Blower and vacuum cleaner |
SG11201909879QA (en) * | 2017-04-23 | 2019-11-28 | Fisher & Paykel Healthcare Ltd | Breathing assistance apparatus |
JP2018207576A (en) * | 2017-05-31 | 2018-12-27 | 日本電産株式会社 | Motor, blowing device and cleaner |
DE102017112983A1 (en) * | 2017-06-13 | 2018-12-13 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Blower housing part with bearing support and blower |
CN208522576U (en) * | 2017-09-13 | 2019-02-19 | 日本电产株式会社 | Motor, air supply device and dust catcher |
JP2019176661A (en) * | 2018-03-29 | 2019-10-10 | 日本電産株式会社 | Rotor assembly, motor, blower, and vacuum cleaner |
JP7299757B2 (en) * | 2019-05-28 | 2023-06-28 | 株式会社ミクニ | impeller and centrifugal pump |
KR102171454B1 (en) | 2019-07-10 | 2020-10-29 | 엘지전자 주식회사 | Fan Motor and Manufacturing the Same |
US11118600B2 (en) * | 2019-11-18 | 2021-09-14 | Asia Vital Components Co., Ltd. | Anti-press fan structure |
JP6960004B2 (en) * | 2020-02-18 | 2021-11-05 | シナノケンシ株式会社 | Blower |
CN113317741B (en) * | 2020-02-28 | 2023-08-18 | 宁波方太厨具有限公司 | Cleaning machine |
CN113944655B (en) * | 2020-07-17 | 2023-07-07 | 广东美的白色家电技术创新中心有限公司 | Flow guiding device of dust collector and dust collector |
DE102020119881A1 (en) * | 2020-07-28 | 2022-02-03 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Tube fan designed as a radial fan |
EP4189251A1 (en) * | 2020-07-31 | 2023-06-07 | Safran Power USA, LLC | Rotating machine with cooling fan |
CN115224875B (en) * | 2021-04-21 | 2023-07-18 | 李钢 | Dust collector motor and working method thereof |
US11882979B2 (en) * | 2022-05-27 | 2024-01-30 | Haier Us Appliance Solutions, Inc. | Centrifugal pump diffuser housings |
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EP0458880A4 (en) * | 1989-02-14 | 1992-02-12 | Airflow Research & Manufacturing Corp. | Centrifugal fan with airfoil vanes in annular volute envelope |
US4946348A (en) * | 1989-02-14 | 1990-08-07 | Airflow Research & Manufacturing Corporation | Centrifugal fan with airfoil vanes in annular volute envelope |
DE4113830A1 (en) * | 1991-04-27 | 1992-10-29 | Klein Schanzlin & Becker Ag | SHARED GUIDE |
JP3331878B2 (en) * | 1996-08-30 | 2002-10-07 | 株式会社日立製作所 | Electric vacuum cleaner |
KR100424313B1 (en) * | 2002-01-03 | 2004-03-25 | 엘지전자 주식회사 | Centrifugal fan of vacuum cleaner |
JP2005201157A (en) * | 2004-01-16 | 2005-07-28 | Sanyo Electric Co Ltd | Electric blower |
CN201433940Y (en) * | 2009-04-21 | 2010-03-31 | 建准电机工业股份有限公司 | Fan frame of axial-flow type thermal fan |
JP6139537B2 (en) * | 2011-10-13 | 2017-05-31 | アクティエボラゲット エレクトロラックス | Vacuum cleaner |
JP6585873B2 (en) * | 2013-08-09 | 2019-10-02 | 日本電産株式会社 | Blower and vacuum cleaner |
-
2015
- 2015-10-30 JP JP2015213650A patent/JP2016223432A/en active Pending
- 2015-10-30 JP JP2015213619A patent/JP2016223428A/en active Pending
-
2016
- 2016-05-24 WO PCT/JP2016/065250 patent/WO2016194697A1/en active Application Filing
- 2016-05-24 EP EP16803132.6A patent/EP3306104A4/en not_active Withdrawn
- 2016-05-24 US US15/576,311 patent/US20180156233A1/en not_active Abandoned
- 2016-05-24 JP JP2017521835A patent/JP6702318B2/en active Active
- 2016-05-24 CN CN201680031279.7A patent/CN107614888B/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3306104A4 (en) | 2019-02-13 |
JP6702318B2 (en) | 2020-06-03 |
JPWO2016194697A1 (en) | 2018-03-22 |
CN107614888B (en) | 2019-08-06 |
JP2016223432A (en) | 2016-12-28 |
WO2016194697A1 (en) | 2016-12-08 |
CN107614888A (en) | 2018-01-19 |
JP2016223428A (en) | 2016-12-28 |
US20180156233A1 (en) | 2018-06-07 |
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