U.S. patent application number 13/831834 was filed with the patent office on 2014-05-15 for impeller and electric blower having the same.
This patent application is currently assigned to SAMSUNG ELECTRO-MECHANICS CO., LTD.. The applicant listed for this patent is SAMSUNG ELECTRO-MECHANICS CO., LTD. Suwon. Invention is credited to Yong Wan Cho.
Application Number | 20140134012 13/831834 |
Document ID | / |
Family ID | 50681864 |
Filed Date | 2014-05-15 |
United States Patent
Application |
20140134012 |
Kind Code |
A1 |
Cho; Yong Wan |
May 15, 2014 |
IMPELLER AND ELECTRIC BLOWER HAVING THE SAME
Abstract
Disclosed herein is an impeller including: an upper surface,
which is an air inlet portion; a lower surface, which is an air
outlet portion; and blades formed between the upper and lower
surfaces, wherein the upper and lower surfaces are provided with
guide grooves for balancing of a motor.
Inventors: |
Cho; Yong Wan; (Suwon,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SAMSUNG ELECTRO-MECHANICS CO., LTD. Suwon |
Suwon |
|
KR |
|
|
Assignee: |
SAMSUNG ELECTRO-MECHANICS CO.,
LTD.
Suwon
KR
|
Family ID: |
50681864 |
Appl. No.: |
13/831834 |
Filed: |
March 15, 2013 |
Current U.S.
Class: |
417/354 ;
416/236R |
Current CPC
Class: |
F04D 17/16 20130101;
F04D 29/662 20130101; F04D 25/0613 20130101 |
Class at
Publication: |
417/354 ;
416/236.R |
International
Class: |
F04D 29/18 20060101
F04D029/18 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 15, 2012 |
KR |
10-2012-0129569 |
Claims
1. An impeller comprising: an upper surface, which is an air inlet
portion; a lower surface, which is an air outlet portion; and
blades formed between the upper and lower surfaces, wherein the
upper and lower surfaces are provided with guide grooves for
balancing of a motor.
2. The impeller as set forth in claim 1, wherein the guide groove
is formed in a circular shape in a rotation direction of the
impeller.
3. An electric blower comprising: an impeller including an upper
surface, which is an air inlet portion, a lower surface, which is
an air outlet portion, and blades formed between the upper and
lower surfaces, the upper and lower surfaces provided with guide
grooves for balancing of the motor; and a driving module including
a rotor part coupled to the impeller in order to drive the impeller
and a stator part, the rotor part including a magnet, the stator
part including an armature configured of a core and a coil that are
positioned to face the magnet, and the rotor part and the stator
part including an air bearing part formed therebetween, wherein the
rotor part and the impeller are rotated by electromagnetic force of
the magnet and the armature, and the driving module is received in
the impeller.
4. The electric blower as set forth in claim 3, wherein the rotor
part of the driving module includes: a sleeve rotatably supported
by a shaft; and a hub coupled to the sleeve and including the
magnet coupled to an inner peripheral portion thereof.
5. The electric blower as set forth in claim 3, wherein the sleeve
and the shaft are mounted with magnetic bearing magnets at surfaces
facing each other, respectively.
6. The electric blower as set forth in claim 5, wherein the
magnetic bearing magnet is mounted at an upper end portion of the
sleeve.
7. The electric blower as set forth in claim 3, wherein the rotor
part of the driving module includes: a sleeve rotatably supported
by the shaft; and a magnet coupled to the sleeve so as to face the
armature of the stator part.
8. The electric blower as set forth in claim 3, wherein the stator
part of the driving module includes: a shaft rotatably supporting
the rotor part; a base to which the shaft is fixedly coupled; and
the armature coupled to the base and configured of the core and the
coil.
9. The electric blower as set forth in claim 8, wherein the shaft
has a micro gap with the sleeve and is insertedly coupled to the
sleeve so that an air bearing part is formed, and dynamic pressure
generating grooves are formed in an outer peripheral surface of the
shaft facing the sleeve in a radial direction of the shaft.
10. The electric blower as set forth in claim 9, wherein the shaft
further includes a ball mounted on a surface facing the impeller in
an axial direction of the shaft.
11. The electric blower as set forth in claim 10, wherein the shaft
is formed with a ball receiving groove for mounting the ball at a
central portion of an upper end surface thereof.
12. The electric blower as set forth in claim 11, wherein the
impeller further includes a plate mounted on a surface facing the
ball.
13. The electric blower as set forth in claim 1, further
comprising: an impeller cover covering the impeller; and a motor
housing coupled to the impeller cover and including the stator part
mounted therein.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of Korean Patent
Application No. 10-2012-0129569, filed on Nov. 15, 2012, entitled
"Impeller and Electric Blower Having the Same", which is hereby
incorporated by reference in its entirety into this
application.
BACKGROUND OF THE INVENTION
[0002] 1. Technical Field
[0003] The present invention relates to an impeller and an electric
blower having the same.
[0004] 2. Description of the Related Art Generally, a balancing
method of compensating for unbalance of a rotating rotor in a motor
structure of a high speed cleaner is performed by assembling and
processing a balancing part, which is a component capable of
compensating for a balance in the rotating rotor to be
balanced.
[0005] In addition, the balancing part may be configured of upper
and lower balancing parts. In this case, a process of process or
molding a separate balancing part to assembling the balance part is
required, and thus, volume, weight and inertia of the rotor
increase, thereby increasing a load at the time of rotation.
PRIOR ART DOCUMENT
Patent Document
[0006] (Patent Document 1) US 20070134109 A
SUMMARY OF THE INVENTION
[0007] The present invention has been made in an effort to provide
an impeller capable of performing two-dimensional balancing, that
is, balancing at upper and lower portions of the impeller, and
performing more accurate and efficient balancing by balancing guide
grooves.
[0008] In addition, the present invention has been made in an
effort to provide an electric blower capable of implementing
microminiaturization and ultra-lightness by including an impeller
capable of performing efficient balancing, and receiving a driving
module for driving the impeller in the impeller.
[0009] According to a preferred embodiment of the present
invention, there is provided an impeller including: an upper
surface, which is an air inlet portion; a lower surface, which is
an air outlet portion; and blades formed between the upper and
lower surfaces, wherein the upper and lower surfaces are provided
with guide grooves for balancing a motor.
[0010] The guide groove may be formed in a circular shape in a
rotation direction of the impeller.
[0011] According to another preferred embodiment of the present
invention, there is provided an electric blower including: an
impeller including an upper surface, which is an air inlet portion,
a lower surface, which is an air outlet portion, and blades formed
between the upper and lower surfaces, the upper and lower surfaces
provided with guide grooves for balancing the motor; and a driving
module including a rotor part coupled to the impeller in order to
drive the impeller and a stator part, the rotor part including a
magnet, the stator part including an armature configured of a core
and a coil that are positioned to face the magnet, and the rotor
part and the stator part including an air bearing part formed
therebetween, wherein the rotor part and the impeller are rotated
by electromagnetic force of the magnet and the armature, and the
driving module is received in the impeller.
[0012] The rotor part of the driving module may include: a sleeve
rotatably supported by a shaft; and a hub coupled to the sleeve and
including the magnet coupled to an inner peripheral portion
thereof.
[0013] The sleeve and the shaft may be mounted with magnetic
bearing magnets at surfaces facing each other, respectively.
[0014] The magnetic bearing magnet may be mounted at an upper end
portion of the sleeve. The stator part of the driving module may
include: a shaft rotatably supporting the rotor part; a base to
which the shaft is fixedly coupled; and the armature coupled to the
base and configured of the core and the coil.
[0015] The shaft may have a micro gap with the sleeve and be
insertedly coupled to the sleeve so that an air bearing part is
formed, and dynamic pressure generating grooves may be formed in an
outer peripheral surface of the shaft facing the sleeve in a radial
direction of the shaft.
[0016] The shaft may further include a ball mounted on a surface
facing the impeller in an axial direction of the shaft.
[0017] The shaft may be formed with a ball receiving groove for
mounting the ball at a central portion of an upper end surface
thereof.
[0018] The impeller may further include a plate mounted on a
surface facing the ball.
[0019] The electric blower may further including: an impeller cover
covering the impeller; and a motor housing coupled to the impeller
cover and including the stator part mounted therein.
[0020] According to another preferred embodiment of the present
invention, there is provided an electric blower including: an
impeller including an upper surface, which is an air inlet portion,
a lower surface, which is an air outlet portion, and blades formed
between the upper and lower surfaces, the upper and lower surfaces
provided with guide grooves for balancing of the motor; and a
driving module including a rotor part coupled to the impeller in
order to drive the impeller and a stator part, the rotor part
including a magnet, the stator part including an armature
configured of a core and a coil that are positioned to face the
magnet, and the rotor part and the stator part including an air
bearing partformed therebetween, wherein the rotor part and the
impeller are rotated by electromagnetic force of the magnet and the
armature, the driving module is received in the impeller, and the
rotor part of the driving module includes a sleeve rotatably
supported by the shaft and a magnet coupled to the sleeve so as to
face the armature of the stator part.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The above and other objects, features and advantages of the
present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0022] FIG. 1 is a cross-sectional view schematically showing an
impeller according to a preferred embodiment of the present
invention;
[0023] FIG. 2 is a perspective view schematically showing the
impeller shown in FIG. 1;
[0024] FIG. 3 is a cross-sectional view schematically showing an
electric blower including the impeller shown in FIG. 1 according to
a first preferred embodiment of the present invention; and
[0025] FIG. 4 is a cross-sectional view schematically showing an
electric blower including the impeller shown in FIG. 1 according to
a second preferred embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] The objects, features and advantages of the present
invention will be more clearly understood from the following
detailed description of the preferred embodiments taken in
conjunction with the accompanying drawings. Throughout the
accompanying drawings, the same reference numerals are used to
designate the same or similar components, and redundant
descriptions thereof are omitted. Further, in the following
description, the terms "first", "second", "one side", "the other
side" and the like are used to differentiate a certain component
from other components, but the configuration of such components
should not be construed to be limited by the terms. Further, in the
description of the present invention, when it is determined that
the detailed description of the related art would obscure the gist
of the present invention, the description thereof will be
omitted.
[0027] Hereinafter, preferred embodiments of the present invention
will be described in detail with reference to the attached
drawings.
[0028] FIG. 1 is a cross-sectional view schematically showing an
impeller according to a preferred embodiment of the present
invention, and FIG. 2 is a perspective view schematically showing
the impeller shown in FIG. 1.
[0029] As shown in FIGS. 1 and 2, in the impeller 10, an upper
surface 11, which is an air inlet portion, and a lower surface 12,
which is an air outlet portion are formed. In addition, blades 13
are formed between the upper and lower surfaces 11 and 112.
[0030] More specifically, the blade 13 is formed with a round part
so that a standing direction is bent from an upper portion, which
is the inlet portion, to a lower portion, which is the outlet
portion.
[0031] Further, the upper surface 11 is provided with a guide
groove 11 a for balancing of the motor.
[0032] In addition, the lower surface 12 is provided with a guide
groove 12a for balancing of the motor.
[0033] Further, the guide groove 12a may be formed in a circular
shape in a rotation direction of the impeller.
[0034] As the guide groove 11a in the upper surface and the guide
groove 12a in the lower surface are formed, in the case of
balancing, more accurate and efficient balancing may be performed.
That is, in the case in which a setting position is determined in a
radial direction, and balancing data thereon at the time of
processing a groove are already calculated, an error due to
balancing processing may be prevented, and more efficient and
accurate balancing may be performed.
[0035] In addition, FIGS. 1 and 2 show the case in which the guide
grooves 11a and 12a are simultaneously formed in the upper and
lower surfaces 11 and 12, respectively, and balancing processing
groove 11b and 12b are formed to be balanced. That is, more
accurate and efficient balancing may be performed by
two-dimensional balancing at the upper and lower portions.
[0036] FIG. 3 is a cross-sectional view schematically showing an
electric blower including the impeller shown in FIG. 1 according to
a first preferred embodiment of the present invention.
[0037] As shown in FIG. 3, the electric blower 100 includes an
impeller 110 and a driving module 120. More specifically, the
driving module 120 is positioned at a lower portion of the impeller
so as to be received in the impeller.
[0038] In addition, the impeller 110 is covered with an impeller
cover 200. In addition, the driving module 120 is configured of a
rotor part and stator part, wherein the rotor part is coupled to
the impeller 110 and the stator part is mounted in a motor housing
300. Further, the cover 200 and the motor housing 300 are coupled
to each other by press-fitting, or the like.
[0039] Furthermore, the impeller 110 includes the balancing guide
grooves 111a and 112a formed in upper and lower surfaces 111 and
112, respectively, for balancing of the motor, and balancing
processing grooves 111b and 112b are formed in the balancing guide
grooves 111a and 112a to be balanced, such that more accurate and
efficient balancing may be implemented.
[0040] In addition, in the driving module, a shaft is provided with
a radial dynamic pressure bearing part so as to have an air bearing
part, and the electric blower has a structure in which the driving
module is inserted into the impeller, such that miniaturization and
lightness may be implemented, and high speed driving may be
performed by the air bearing.
[0041] Hereinafter, the driving module of the electric blower
according to the first preferred embodiment of the present
invention will be described in detail.
[0042] The driving module 120 is configured of a stator part
including a shaft 121, a base 122, an armature 123 configured of a
core 123a and a coil 123b, and a printed circuit board 129 and a
rotor part including a sleeve 124, a hub 125, and a magnet 126.
[0043] Further, an outer diameter portion of the shaft 121 and an
inner diameter portion of the sleeve 124 have a micro gap
therebetween, and an air bearing part is formed in the micro gap.
In addition, facing surfaces of the sleeve and the shaft are
mounted with magnetic bearing magnets 127, respectively.
[0044] Next, in the rotor part, the sleeve 124 is rotatably
supported by the shaft 121. In addition, the sleeve 124 may include
a radial dynamic pressure generating groove formed in the inner
diameter portion thereof so that the air bearing part is formed in
the micro gap with the shaft 121, as described above.
[0045] Further, the hub 125 is coupled to the sleeve 124 and
configured of a disk part 125a extended from the sleeve 124 in an
outer diameter direction and a side wall part 125b extended
downwardly in an axial direction of the shaft from an end portion
of the disk part 125a in the outer diameter direction.
[0046] Further, the sidewall part 125b includes an annular ring
shaped magnet 126 mounted on an inner peripheral surface thereof so
as to face the armature 123 configured of the core 123a and the
coil 123b.
[0047] Further, a magnetic bearing magnet 127a is mounted on an
inner peripheral surface of the sleeve 124 so as to face a magnetic
bearing magnet 127b of the shaft.
[0048] In addition, the magnetic bearing magnet 127a may have an
annular ring shape.
[0049] Next, in the stator part, the shaft 121 rotatably supports
the sleeve 124 as described above, and the lower portion thereof is
fixedly coupled to the base 122.
[0050] Further, the shaft 121 is mounted with the magnetic bearing
magnet 127b so as to face the magnetic bearing magnet 127a of the
sleeve.
[0051] That is, the driving module having a system in which dynamic
pressure by the magnetic bearing magnets 127a and 127b mounted on
each of the sleeve 124 and the shaft 121 in addition to the air
bearing may be further stably designed may be implemented.
[0052] In addition, an outer peripheral surface of the shaft 121
may be provided with radial dynamic pressure generating grooves so
as to form the air bearing part. As described above, the dynamic
pressure generating groove may be selectively formed in the outer
peripheral surface of the shaft facing the sleeve or the inner
peripheral surface of the sleeve facing the shaft.
[0053] FIG. 3 shows the case in which the dynamic pressure
generating grooves 121a are formed in the outer peripheral surface
of the shaft. In addition the dynamic pressure generating groove
may have various shapes such as a herringbone shape, or the like,
and various sizes according to a design of the dynamic
pressure.
[0054] Next, the base 122 includes the armature 123 fixedly coupled
to the outer peripheral portion thereof by press-fitting, adhesion,
or the like, so as to face the magnet 126, wherein the armature 123
includes the core 123a and the coil 123b.
[0055] In addition, the printed circuit board 129, which is to
supply power to the armature, is mounted on one surface of the base
122.
[0056] Through the above-mentioned configuration, in the electric
blower including the impeller according to the first preferred
embodiment of the present invention, two-dimensional balancing,
that is, balancing at the upper and lower portions of the impeller,
may be performed, and more accurate and efficient balancing may be
performed by the balancing guide grooves.
[0057] FIG. 4 is a cross-sectional view schematically showing an
electric blower including the impeller shown in FIG. 1 according to
a second preferred embodiment of the present invention. More
specifically, in the electric blower according to the second
preferred embodiment of the present invention, a magnet is
implemented in an inner-rotor type in which the magnet is coupled
to a sleeve and rotates together with the sleeve, as compared to
the electric blower according to the first preferred embodiment of
the present invention. As shown FIG. 4, the electric blower 100
includes an impeller 110 and a driving module 130. More
specifically, the driving module 130 is mounted at an inner portion
and a lower portion of the impeller 110 of the electric blower
100.
[0058] In addition, the impeller 110 is covered with an impeller
cover 200. In addition, the driving module 130 is configured of a
rotor part and stator part, wherein the rotor part is coupled to
the impeller 110 and the stator part is mounted in a motor housing
300. Further, the cover 200 and the motor housing 300 are coupled
to each other by press-fitting, or the like. Furthermore, the
impeller 110 includes the balancing guide grooves 111a and 112a
formed in upper and lower surfaces 111 and 112, respectively, for
balancing the motor, and balancing processing grooves 111b and 112b
are formed in the balancing guide grooves 111a and 112a to be
balanced, such that more accurate and efficient balancing may be
implemented.
[0059] Furthermore, the driving module has a shaft provided with a
radial dynamic pressure bearing part so as to have an air bearing
part.
[0060] In addition, the driving module 130 is configured of a
stator part including a shaft 131, a base 132, an armature 133
configured of a core 133a and a coil 133b, and a printed circuit
board 138 and a rotor part including a sleeve 134 and a magnet 135,
wherein an outer diameter portion of the shaft 131 and an inner
diameter portion of the sleeve 134 have a micro gap therebetween,
and an air bearing part is formed in the micro gap. In addition,
facing surfaces of the sleeve and the shaft are mounted with
magnetic bearing magnets 137a and 137b, respectively.
[0061] More specifically, in the rotor part, the sleeve 134 is
rotatably supported by the shaft 131. In addition, the sleeve 134
may include a radial dynamic pressure generating groove formed in
an inner diameter portion thereof so that the air bearing part is
formed in the micro gap with the shaft 131, as described above.
[0062] In addition, the sleeve is mounted with the magnet 135
facing the armature of the stator part on an inner peripheral
surface thereof. Further, a magnetic bearing magnet 137a is mounted
so as to face a magnetic bearing magnet 137b of the shaft.
[0063] In addition, the magnetic bearing magnet 137a may have an
annular ring shape.
[0064] Next, in the stator part, the shaft 131 rotatably supports
the sleeve 134 as described above, and the lower portion thereof is
fixedly coupled to the base 132.
[0065] Further, the shaft 131 is mounted with the magnetic bearing
magnet 137b so as to face the magnetic bearing magnet 137a of the
sleeve.
[0066] That is, the driving module having a system in which dynamic
pressure by the magnetic bearing magnets 137a and 137b mounted on
each of the sleeve 134 and the shaft 131 in addition to the air
bearing may be stably designed may be implemented.
[0067] In addition, an outer peripheral surface of the shaft 131
may be provided with radial dynamic pressure generating grooves so
as to form the air bearing part. As described above, the dynamic
pressure generating groove may be selectively formed in the outer
peripheral surface of the shaft facing the sleeve or the inner
peripheral surface of the sleeve facing the shaft.
[0068] Next, the base 132 includes the armature 133 fixedly coupled
thereto by press-fitting, adhesion, or the like, so as to face the
magnet 135, wherein the armature 133 includes the core 133a and the
coil 133b.
[0069] In addition, the printed circuit board 138, which is to
supply power to the armature, is mounted on one surface of the base
132.
[0070] As described above, as the electric blower according to the
first preferred embodiment of the present invention has a structure
in which the driving module is inserted into the impeller,
miniaturization and lightness thereof may be implemented, and
high-speed driving may be implemented by the air bearing.
[0071] According to the present invention, the impeller capable of
performing two-dimensional balancing, that is, balancing at the
upper and lower portions of the impeller, and performing more
accurate and efficient balancing by balancing guide grooves may be
provided. In addition, the electric blower capable of implementing
microminiaturization and ultra-lightness by including the impeller
capable of performing efficient the balancing, and receiving the
driving module for driving the impeller in the impeller may be
provided.
[0072] Although the embodiments of the present invention have been
disclosed for illustrative purposes, it will be appreciated that
the present invention is not limited thereto, and those skilled in
the art will appreciate that various modifications, additions and
substitutions are possible, without departing from the scope and
spirit of the invention.
[0073] Accordingly, any and all modifications, variations or
equivalent arrangements should be considered to be within the scope
of the invention, and the detailed scope of the invention will be
disclosed by the accompanying claims.
* * * * *