U.S. patent application number 16/748942 was filed with the patent office on 2020-07-30 for bidirectional pump.
The applicant listed for this patent is LG ELECTRONICS INC.. Invention is credited to Dohyun JUNG, Taehee LEE.
Application Number | 20200240419 16/748942 |
Document ID | 20200240419 / US20200240419 |
Family ID | 1000004655253 |
Filed Date | 2020-07-30 |
Patent Application | download [pdf] |
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United States Patent
Application |
20200240419 |
Kind Code |
A1 |
JUNG; Dohyun ; et
al. |
July 30, 2020 |
BIDIRECTIONAL PUMP
Abstract
Provided is a bidirectional pump, including a housing comprising
a fluid inlet, and first and second fluid outlets that communicate
with the fluid inlet and face each other; an impeller disposed in
the housing, and rotating in a forward direction or in a reverse
direction; a motor configured to impart a rotating force to the
impeller; and a diaphragm disposed between the first and second
fluid outlets in the housing, and deformed according to pressure
exerted by rotation of the impeller, wherein the diaphragm closes
either of the first and second fluid outlets according to a
rotating direction of the impeller.
Inventors: |
JUNG; Dohyun; (Seoul,
KR) ; LEE; Taehee; (Seoul, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LG ELECTRONICS INC. |
Seoul |
|
KR |
|
|
Family ID: |
1000004655253 |
Appl. No.: |
16/748942 |
Filed: |
January 22, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04D 15/0016
20130101 |
International
Class: |
F04D 15/00 20060101
F04D015/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 25, 2019 |
KR |
10-2019-0009714 |
Claims
1. A bidirectional pump, comprising: a housing comprising a fluid
inlet, and first and second fluid outlets that communicate with the
fluid inlet and face each other; an impeller disposed in the
housing, and rotating in a forward direction or in a reverse
direction; a motor configured to impart a rotating force to the
impeller; and a diaphragm disposed between the first and second
fluid outlets in the housing, and deformed according to pressure
exerted by rotation of the impeller, wherein the diaphragm closes
either of the first and second fluid outlets according to a
rotating direction of the impeller.
2. The bidirectional pump of claim 1, wherein the diaphragm
comprises: a fixing part fixed to the housing; an insert part
configured such that a portion thereof is insertable into either of
the first and second fluid outlets; and a deforming part connecting
the fixing part and the insert part to each other, and deformable
towards either of the first and second fluid outlets.
3. The bidirectional pump of claim 2, wherein the deforming part is
an elastic body, is wrinkled before the deformation, and is
unwrinkled after the deformation.
4. The bidirectional pump of claim 3, wherein the insert part is
formed in a spherical shape, and has a diameter smaller than a
diameter of each of the first and second fluid outlets.
5. The bidirectional pump of claim 4, wherein, when the impeller
rotates in the forward direction, the deforming part is deformed
towards the first fluid outlet so that a portion of the insert part
is inserted into the first fluid outlet, and when the impeller
rotates in the reverse direction, the deforming part is deformed
towards the second fluid outlet so that a portion of the insert
part is inserted into the second fluid outlet.
6. The bidirectional pump of claim 2, wherein the housing comprises
a groove part into which the fixing part is inserted, and the
fixing part is detachably fixed to the groove part.
7. The bidirectional pump of claim 2, further comprising: a
partition wall disposed in the housing, and guiding flow of fluid
from the fluid inlet to either of the first and second fluid
outlets.
8. The bidirectional pump of claim 7, wherein a width of the
partition wall is reduced downstream of the fluid flow from the
fluid inlet to either of the first and second fluid outlets.
9. The bidirectional pump of claim 1, wherein the housing is
integrally formed to prevent the fluid from flowing in and out at
positions other than the fluid inlet and the first and second fluid
outlets.
10. The bidirectional pump of claim 1, comprising a controller
configured to control rotation and a rotating direction of the
impeller.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority benefit of Korean
Patent Application No. 10-2019-0009714, filed on Jan. 25, 2019 in
the Korean Intellectual Property Office, the disclosure of which is
incorporated herein by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
[0002] The present disclosure relates to bidirectional pump and,
more particularly, to a bidirectional pump that can adjust the
discharge direction of fluid according to the rotating direction of
a single motor.
Related Art
[0003] Generally, a bidirectional pump is a device that is used in
a washing machine or a dishwasher and is used to change a water
supply direction according to the circulation mode and the drainage
mode of the washing machine or the dishwasher.
[0004] A conventional bidirectional pump has a motor and an
impeller on each of two water supply paths to adjust a water supply
direction. This bidirectional pump is problematic in that its
structure is complex, its installation cost is expensive, and
replacement and repair are difficult.
[0005] In order to solve the problems, a bidirectional pump that
may supply water in either direction through an electronic valve
while having only one motor and impeller has been developed.
However, this bidirectional pump is problematic in that the
installation cost of the electronic valve is also expensive, and it
is impossible to completely exclude malfunction due to electronic
defects.
[0006] Furthermore, this bidirectional pump is problematic in that
closing any one of paths (or holes) through which water is supplied
via a linear member so as to change a water supply direction makes
it difficult to ensure reliability.
[0007] Moreover, there has not been proposed a structure that can
minimize the flow resistance of water even when a water supply
direction is changed.
[0008] Meanwhile, as a housing defining an exterior of the
bidirectional pump is not integrally formed but is manufactured as
an assembly, water may unexpectedly flow out due to high pressure
generated in the bidirectional pump.
SUMMARY OF THE INVENTION
[0009] The present disclosure provides a bidirectional pump that
can adjust a water supply direction while having a single motor and
impeller.
[0010] The present disclosure also provides a bidirectional pump
that can minimize flow resistance while guiding the change of a
water supply direction.
[0011] The present disclosure also provides a bidirectional pump
including a housing that can prevent water from leaking out.
[0012] Objects of the present disclosure are not limited to the
above-mentioned objects. Other objects that are not mentioned
herein may be more clearly understood by those skilled in the art
from the following description.
[0013] In an aspect, a bidirectional pump may include a housing
including a fluid inlet, and first and second fluid outlets that
communicate with the fluid inlet and face each other; an impeller
rotating in a forward direction or in a reverse direction; a motor;
and a diaphragm disposed between the first and second fluid outlets
in the housing, and deformed according to pressure exerted by
rotation of the impeller, wherein the diaphragm closes either of
the first and second fluid outlets according to a rotating
direction of the impeller.
[0014] The diaphragm may include a fixing part fixed to the
housing; an insert part configured such that a portion thereof is
insertable into either of the first and second fluid outlets; and a
deforming part connecting the fixing part and the insert part to
each other, and deformable towards either of the first and second
fluid outlets.
[0015] The deforming part may be an elastic body, may be wrinkled
before the deformation, and may be unwrinkled after the
deformation.
[0016] The insert part may be formed in a spherical shape, and may
have a diameter smaller than a diameter of each of the first and
second fluid outlets.
[0017] The housing may include a groove part into which the fixing
part is inserted, and the fixing part may be detachably fixed to
the groove part.
[0018] The bidirectional pump may further include a partition wall
disposed in the housing, and guiding flow of fluid from the fluid
inlet to either of the first and second fluid outlets.
[0019] The housing may be integrally formed to prevent the fluid
from flowing in and out at positions other than the fluid inlet and
the first and second fluid outlets.
[0020] Other objects that are not mentioned herein may be fully
deduced from the following description of embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a perspective view illustrating a bidirectional
pump according to an embodiment of the present disclosure.
[0022] FIG. 2 is a diagram illustrating an installed state of a
diaphragm according to an embodiment of the present disclosure.
[0023] FIG. 3 is a diagram illustrating the diaphragm when an
impeller according to an embodiment of the present disclosure is
not rotated.
[0024] FIG. 4 is a diagram illustrating a state in which the
diaphragm is deformed to close a first fluid outlet when the
impeller according to the embodiment of the present disclosure
rotates in a forward direction.
[0025] FIG. 5 is a diagram illustrating a state in which the
diaphragm is deformed to close a second fluid outlet when the
impeller according to the embodiment of the present disclosure
rotates in a reverse direction.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0026] The above and other objects, features and other advantages
of the present disclosure will be more clearly understood from the
following detailed description when taken in conjunction with the
accompanying drawings. However, the disclosure should not be
limited to embodiments set forth herein but may be implemented in a
variety of forms. The embodiments described herein are provided to
make the disclosure complete and to fully convey the spirit of the
invention to those skilled in the art. The disclosure is defined
merely by the scope of claims. The same reference numerals are used
throughout the drawings to designate the same components.
[0027] It will be understood that when a component is referred to
as being "coupled to" or "connected to" another component, it may
be directly coupled or connected to the other element or
intervening components may be present therebetween.
[0028] The present disclosure may be described with reference to a
spatial orthogonal coordinate system by X, Y, and Z axes that are
shown in FIG. 1 and the like and are orthogonal to each other. Each
axis direction (X-axis direction, Y-axis direction, and Z-axis
direction) means both directions in which each axis extends. A
symbol `+` added to a front of each axis direction (+X-axis
direction, +Y-axis direction, +Z-axis direction) means any one of
both directions in which each axis extends, namely, a positive
direction. A symbol `-` added to a front of each axis direction
(-X-axis direction, -Y-axis direction, -Z-axis direction) means a
remaining one of both directions in which each axis extends,
namely, a negative direction.
[0029] Hereinafter, a bidirectional pump according to an embodiment
of the present disclosure will be described with reference to FIGS.
1 to 5.
[0030] FIG. 1 is a perspective view illustrating a bidirectional
pump according to an embodiment of the present disclosure. FIG. 2
is a diagram illustrating an installed state of a diaphragm
according to an embodiment of the present disclosure, FIG. 3 is a
diagram illustrating the diaphragm when an impeller according to an
embodiment of the present disclosure is not rotated, FIG. 4 is a
diagram illustrating a state in which the diaphragm is deformed to
close a first fluid outlet when the impeller according to the
embodiment of the present disclosure rotates in a forward
direction, and FIG. 5 is a diagram illustrating a state in which
the diaphragm is deformed to close a second fluid outlet when the
impeller according to the embodiment of the present disclosure
rotates in a reverse direction.
[0031] The bidirectional pump 100 according to the embodiment of
the present disclosure may be a device that is used in a washing
machine or a dishwasher.
[0032] By way of example, it is necessary to supply water into a
tub or drain water to an outside during a washing operation. To
this end, a device for changing a water supply (discharge)
direction is required. Hence, the bidirectional pump 100 according
to the embodiment of the present disclosure may be used.
[0033] As shown in FIG. 1, the bidirectional pump 100 according to
the embodiment of the present disclosure includes a housing 10, an
impeller 40, a motor 30, and a diaphragm 60.
[0034] The housing 10 may define an exterior of the bidirectional
pump 100, and may be made in various shapes as well as a shape
shown in FIG. 1.
[0035] A fluid inlet 21, a first fluid outlet 22, and a second
fluid outlet 23 may be formed in the housing 10.
[0036] The fluid such as water may be introduced into the housing
10 through the fluid inlet 21. In this case, the relevant fluid may
pass through a filter (not shown). The fluid introduced into the
housing 10 through the fluid inlet 21 may be discharged through
either of the first and second fluid outlets 22 and 23 to the
outside of the housing 10.
[0037] That is, the first and second fluid outlets 22 and 23
communicate with the fluid inlet 21. Furthermore, as shown in FIGS.
2 to 5, the first and second fluid outlets 22 and 23 may be
arranged to face each other. Center lines of the first and second
fluid outlets 22 and 23 may be on a common axis (Y-axis).
[0038] The impeller 40 may be disposed in the housing 10. The
impeller 40 may rotate in both directions. The impeller 40 may
rotate in a forward direction or in a reverse direction. In this
regard, the forward direction may mean a counterclockwise
direction, and the reverse direction may mean a clockwise
direction.
[0039] The impeller 40 may rotate in the forward direction or in
the reverse direction, and may transfer kinetic energy to fluid
introduced into the housing 10 through the fluid inlet 21. In other
words, the fluid introduced into the housing 10 through the fluid
inlet 21 may be compressed by the rotation of the impeller 40 and
then may be discharged to the outside through either of the first
and second fluid outlets 22 and 23.
[0040] The impeller 40 may be manufactured in various types, such
as a rotary type, a turbine type, or a propeller type. However, in
order to transfer the same kinetic energy to the fluid introduced
into the housing 10 through the fluid inlet 21 regardless of a
rotating direction, the impeller 40 may be preferably provided with
a vane arranged parallel to a rotation axis (Z-axis) of the
impeller 40.
[0041] The motor 30 may impart a rotating force to the impeller 40.
That is, as the motor 30 rotates, the impeller 40 may be rotated.
According to the rotating direction of the motor 30, the rotating
direction of the impeller 40 may be determined. In other words, as
the motor 30 rotates in the forward direction or in the reverse
direction, the impeller 40 connected to the motor 30 may also
rotate in the forward direction or in the reverse direction.
[0042] If the fluid such as water is introduced into the motor 30,
this may lead to serious defects. As shown in FIG. 1, the motor 30
is preferably disposed outside of the housing 10. Although not
shown in the drawings, a sealing member may be further included to
prevent the fluid from flowing through a connecting structure of
the motor 30 and the impeller 40 into the motor 30.
[0043] As described above, the bidirectional pump 100 according to
the embodiment of the present disclosure has only one motor 30 and
one impeller 40. Thus, when comparing this bidirectional pump 100
with a conventional bidirectional pump having two motors and two
impellers, the former reduces cost and make it easier to replace
and repair.
[0044] The bidirectional pump 100 according to the embodiment of
the present disclosure may control which of the first or second
fluid outlet 22 or 23 the fluid introduced into the housing 10
through the fluid inlet 21 is discharged to, via the diaphragm 60
that is deformed according to the rotating directions of the motor
30 and the impeller 40. This will be described below in detail.
[0045] As shown in FIG. 1, the diaphragm 60 may be disposed in the
housing 10, and may be disposed between the first and second fluid
outlets 22 and 23. As shown in FIGS. 2 to 4, the diaphragm 60 may
include an insert part 61, a deforming part 62, and a fixing part
63.
[0046] The fixing part 63 is a member that is fixed to the housing
10. In this connection, as shown in FIG. 2, the housing 10 may
include a main body 11 that defines an entire exterior, and a
groove part 12 that extends inwards from the main body 11. The
fixing part 63 may be detachably fixed to the groove part 12 of the
housing 10.
[0047] The fixing part 63 located at an end of the diaphragm 60 may
be fixed to the groove part 12, so that the diaphragm 60 may be
fixed to the interior of the housing 10. Furthermore, as described
above, since the fixing part 63 is detachably fixed to the groove
part 12, it is easy to replace and repair the diaphragm 60.
[0048] Meanwhile, according to the present disclosure, the groove
part 12 is provided on each of upper and lower portions in the
Z-axis direction of the bidirectional pump 100. However, a
plurality of groove parts may be provided in other directions. That
is, the shape and number of the groove parts are not limited.
[0049] The deforming part 62 may be disposed between the fixing
part 63 and the insert part 61 that will be described later, thus
connecting the fixing part 63 and the insert part 61 to each other.
The deforming part 62 may be deformed towards either of the first
and second fluid outlets 22 and 23.
[0050] The deforming part 62 may be deformed according to pressure
exerted by the rotation of the impeller 40. To be more specific,
when pressure acting on one side of the deforming part 62 is larger
than pressure acting on the other side that is opposite to one
side, the deforming part 62 may be deformed towards the other side.
In contrast, when pressure acting on the other side of the
deforming part 62 is larger than pressure acting on one side, the
deforming part 62 may be deformed towards one side.
[0051] By way of example, as shown in FIG. 4, if the impeller 40
rotates in the forward direction, pressure in +Y-axis direction
with respect to the deforming part 62 becomes larger than pressure
in -Y-axis direction, so that the deforming part 62 may be deformed
in +Y-axis direction, that is, towards the first fluid outlet
22.
[0052] In contrast, as shown in FIG. 5, if the impeller 40 rotates
in the reverse direction, pressure in -Y-axis direction with
respect to the deforming part 62 becomes larger than pressure in
+Y-axis direction, so that the deforming part 62 may be deformed in
-Y-axis direction, that is, towards the second fluid outlet 23.
[0053] As described above, since the deforming part 62 may be
deformed and restored, the deforming part may be made of an elastic
body. That is, the material of the deforming part 62 may be a
rubber material.
[0054] Further, since the deforming part is disposed in the middle
of the first and second fluid outlets 22 and 23 before the
deformation as shown in FIG. 3, and the deforming part is biased
towards either of the first and second fluid outlets 22 and 23
after the deformation as shown in FIGS. 4 and 5, it is necessary to
adjust a distance between the fixing part 63 and the insert part
61.
[0055] Thus, the deforming part 62 according to the present
disclosure may be wrinkled as shown in FIG. 3 before the
deformation, and may be unwrinkled as shown in FIGS. 4 and 5 after
the deformation.
[0056] In this case, in order to ensure the reliability of closing
the first and second fluid outlets 22 and 23 by the deforming part
62, the deforming part 62 is preferably restored to a wrinkled
shape as shown in FIG. 3 when the impeller 40 is not rotated.
[0057] The insert part 61 may be disposed on the center of the
diaphragm 60. That is, as shown in FIG. 1 and the like, the insert
part 61 may be located at the center and the deforming part 62 and
the fixing part 63 may be located outside the insert part.
[0058] The center of the insert part 61 may be present on the
center lines of the first and second fluid outlets 22 and 23. A
portion of the insert part 61 may be inserted into either of the
first and second fluid outlets 22 and 23.
[0059] That is, a portion of the insert part 61 may be inserted
into either of the first and second fluid outlets 22 and 23, thus
closing a corresponding outlet.
[0060] To this end, as shown in FIGS. 4 and 5, when the insert part
61 is formed in a spherical shape, the diameter of the insert part
61 may be smaller than the diameter of each of the first and second
fluid outlets 22 and 23. Furthermore, the insert part 61 may be
formed of a rubber material.
[0061] When a portion of the insert part 61 is inserted into either
of the first and second fluid outlets 22 and 23, they are in
surface contact with each other. As compared with a point contact
or a line contact when the outlet is closed by a linear member, the
surface contact allows the fluid to be more reliably sealed.
[0062] In summary, in the bidirectional pump 100 according to the
present disclosure, when the impeller 40 rotates in the forward
direction, the deforming part 62 is deformed towards the first
fluid outlet 22, so that a portion of the insert part 61 is
inserted into the first fluid outlet 22, and thereby the fluid
introduced into the housing 10 through the fluid inlet 21 can be
discharged to the outside through the second fluid outlet 23.
[0063] Furthermore, when the impeller 40 rotates in the reverse
direction, the deforming part 62 is deformed towards the second
fluid outlet 23, so that a portion of the insert part 61 is
inserted into the second fluid outlet 23, and thereby the fluid
introduced into the housing 10 through the fluid inlet 21 can be
discharged to the outside through the first fluid outlet 22.
[0064] That is, the bidirectional pump 100 according to the present
disclosure may adjust a direction in which water is supplied
(discharged), via the diaphragm 60 that is deformed by the rotation
of the single motor 30 and the impeller 40. In this case, it is
easy to replace and repair the diaphragm 60, and the outlet can be
more reliably closed by the diaphragm 60.
[0065] Meanwhile, when the fluid discharge direction is changed by
the deformation of the diaphragm 60, it is necessary to make the
flow of the fluid smoother.
[0066] To this end, as shown in FIGS. 1 to 5, the bidirectional
pump 100 according to the embodiment of the present disclosure may
further include a partition wall 15 that is disposed in the housing
10 and guides the flow of the fluid from the fluid inlet 21 to
either of the first and second fluid outlets 22 and 23.
[0067] The partition wall 15 may be formed as a portion of the
chamber 14. Here, the chamber 14 may be disposed in the housing 10,
and may accommodate the impeller 40 and a plate 50 therein.
[0068] A portion of the partition wall 15 may be fixedly inserted
into the plate 50, and the partition wall may be disposed in the
middle of a passage through which the fluid flows. Thereby, the
flow of the fluid may be guided from the fluid inlet 21 to either
of the first and second fluid outlets 22 and 23.
[0069] As shown in FIGS. 3 to 5, the width of the partition wall 15
may be reduced downstream of the fluid flow from the fluid inlet to
either of the first and second fluid outlets. Thereby, it is
possible to naturally guide the flow of the fluid, thus minimizing
flow resistance.
[0070] The housing 10 according to the embodiment of the present
disclosure may not be an assembly made by assembling a plurality of
members but may be integrally formed as a single member. Thereby,
it is possible to prevent fluid flowing at high pressure in the
housing 10 from flowing out at positions other than the fluid inlet
21 and the first and second fluid outlets 22 and 23.
[0071] Meanwhile, as shown in FIG. 1, the bidirectional pump 100
according to the embodiment of the present disclosure may further
include a stopper 70. The interior of the housing 10 is accessible
through the stopper 70, so that it is possible to remove foreign
matter present in the housing 10 or to replace and repair
components including the filter, the diaphragm 60, etc.
[0072] Furthermore, as shown in FIG. 1, the bidirectional pump 100
according to the embodiment of the present disclosure may be placed
on a support 80. However, a member and a means for fixing the
bidirectional pump 100 are not limited particularly.
[0073] The bidirectional pump 100 according to the embodiment of
the present disclosure may further include a controller 90. The
controller 90 may control the rotation and the rotating directions
of the motor 30 and the impeller 40.
[0074] The controller 90 may be implemented using at least one of
application specific integrated circuits (ASICs), digital signal
processors (DSPs), digital signal processing devices (DSPDs),
programmable logic devices (PLDs), field programmable gate arrays
(FPGAs), processors, controllers, micro-controllers,
microprocessors, and electric units for performing other
functions.
[0075] As described above, the bidirectional pump according to the
embodiment of the present disclosure has been described with
reference to the accompanying drawings. However, the present
disclosure is not limited to the above-described embodiment, and
various modifications and equivalents may be made by those skilled
in the art without departing from the scope of the present
disclosure.
[0076] According to the present disclosure, one or more effects are
as follows.
[0077] First, a water supply direction can be changed by closing
either of first and second fluid outlets through a diaphragm that
is deformed according to pressure exerted by the rotation of a
single motor and impeller.
[0078] Second, it is possible to minimize flow resistance while
guiding the flow of fluid from a fluid inlet to either of first and
second fluid outlets through a partition wall disposed in a
housing.
[0079] Third, since a housing defining an exterior of a
bidirectional pump is integrally formed, it is possible to prevent
water from unexpectedly flowing out.
* * * * *