U.S. patent application number 16/936481 was filed with the patent office on 2021-10-28 for robot cleaner.
This patent application is currently assigned to LG ELECTRONICS INC.. The applicant listed for this patent is LG ELECTRONICS INC.. Invention is credited to Jungmin KO, Jihyun LIM, Changhwa SUN.
Application Number | 20210330148 16/936481 |
Document ID | / |
Family ID | 1000004989132 |
Filed Date | 2021-10-28 |
United States Patent
Application |
20210330148 |
Kind Code |
A1 |
SUN; Changhwa ; et
al. |
October 28, 2021 |
ROBOT CLEANER
Abstract
A robot cleaner includes a main body forming an exterior of the
robot cleaner, a driving unit configured to move the main body, a
cleaning module coupled to the main body and configured to suction
dust from a traveling surface, and a dust collector coupled to the
main body and configured to collect the dust suctioned by the
cleaning module. The cleaning module includes a cleaning module
housing that defines an exterior of the cleaning module that is
coupled to the main body. A mopping unit is rotatably coupled in
the cleaning module housing. The mopping unit is configured to
accommodate water therein and clean the traveling surface. A mop is
detachably coupled to the mopping unit, and a pump is disposed in
the mopping unit. The pump is configured to guide water to the mop
as the main body moves.
Inventors: |
SUN; Changhwa; (Seoul,
KR) ; KO; Jungmin; (Seoul, KR) ; LIM;
Jihyun; (Seoul, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LG ELECTRONICS INC. |
Seoul |
|
KR |
|
|
Assignee: |
LG ELECTRONICS INC.
Seoul
KR
|
Family ID: |
1000004989132 |
Appl. No.: |
16/936481 |
Filed: |
July 23, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47L 9/14 20130101; A47L
9/2852 20130101; A47L 9/009 20130101; A47L 7/00 20130101; A47L
11/4061 20130101; A47L 11/4083 20130101; A47L 2201/04 20130101;
A47L 11/4088 20130101; A47L 9/2826 20130101 |
International
Class: |
A47L 7/00 20060101
A47L007/00; A47L 9/28 20060101 A47L009/28; A47L 11/40 20060101
A47L011/40; A47L 9/00 20060101 A47L009/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 28, 2020 |
KR |
10-2020-0051421 |
Claims
1. A robot cleaner comprising: a main body forming an exterior of
the robot cleaner; a driving unit configured to move the main body;
a cleaning module coupled to the main body and configured to
suction dust from a traveling surface; and a dust collector coupled
to the main body and configured to collect the dust suctioned by
the cleaning module, wherein the cleaning module includes: a
cleaning module housing defining an exterior of the cleaning
module, wherein the cleaning module is coupled to the main body; a
mopping unit rotatably coupled in the cleaning module housing,
wherein the mopping unit is configured to accommodate water therein
and configured to clean the traveling surface; a mop detachably
coupled to the mopping unit; and a pump disposed in the mopping
unit, wherein the pump is configured to guide water to the mop as
the main body moves.
2. The robot cleaner of claim 1, further comprising: a mopping unit
receiving portion for receiving the mopping unit therein, wherein
the pump includes: a pump housing disposed on one side of the
mopping unit and connected to the mopping unit receiving portion; a
rotation preventing member configured to prevent a rotation of the
pump housing; and a water supply configured to supply water to the
mop.
3. The robot cleaner of claim 2, wherein the mopping unit receiving
portion includes a climbing preventing portion extending forwardly
from the cleaning module housing and configured to prevent the
robot cleaner from moving to a stepped terrain.
4. The robot cleaner of claim 2, wherein the water supply includes
a diaphragm pump.
5. The robot cleaner of claim 4, further comprising: a body forming
an exterior of the mopping unit; and a water tank, configured to
accommodate water therein, disposed in the body, wherein the water
supply includes: an inlet tube extending in a longitudinal
direction of the body from an interior of the water tank, wherein
water is configured to flow into the water supply through the inlet
tube; and an outlet tube connected to the water supply and the mop,
the outlet tube being configured to guide water discharged from the
water supply to the mop.
6. The robot cleaner of claim 5, wherein the pump is disposed on a
first side of the body and the water tank, wherein a detachable cap
is disposed on a second side of the body and the water tank, and
wherein the water tank is configured to be opened using the
cap.
7. The robot cleaner of claim 6, wherein the cap is formed as a
twist cap.
8. The robot cleaner of claim 5, further comprising: a water inlet
defined on an outer circumferential surface of the body, the water
inlet being configured to allow water to be introduced into the
body.
9. The robot cleaner of claim 4, further comprising: a body forming
an exterior of the mopping unit and configured to accommodate water
therein, wherein the water supply includes: an inlet tube extending
in a longitudinal direction of the body from an interior of the
body, wherein water is configured to flow into the water supply
through the inlet tube; and an outlet tube connected to the water
supply and the mop, the outlet tube being configured to guide water
discharged from the water supply to the mop.
10. The robot cleaner of claim 4, wherein the pump includes a gear
pump.
11. The robot cleaner of claim 10, further comprising: a body
forming an exterior of the mopping unit and configured to
accommodate water therein, wherein the pump includes: a pump
housing forming an exterior of the pump, wherein the pump housing
is coupled to the body; a communication hole defined in the pump
housing and in fluid communication with the body; a first gear
configured to be rotated as the body rotates; and a second gear
meshing with the first gear, wherein the second gear is configured
to guide water introduced into the communication hole to the
mop.
12. The robot cleaner of claim 11, wherein the body includes a
water supply passage in fluid communication with the pump housing
and the mop.
13. The robot cleaner of claim 12, wherein the water supply passage
includes: a first water supply passage in fluid communication with
the pump housing; and a second water supply passage in fluid
communication with the first water supply passage and branched to
two sides of the body to be in fluid communication with the
mop.
14. The robot cleaner of claim 12, wherein a guide member,
configured to guide water introduced into the communication hole to
the water supply passage, is disposed in the pump housing.
15. The robot cleaner of claim 10, further comprising: a body
forming an exterior of the mopping unit; and a water tank disposed
in the body, wherein the water tank is configured to accommodate
water therein, wherein the pump includes: a pump housing forming an
exterior of the pump, wherein the pump housing is coupled to the
body; a communication hole defined in the pump housing and in fluid
communication with the water tank; a first gear configured to be
rotated as the body rotates; and a second gear meshing with the
first gear, wherein the second gear is configured to guide water
introduced into the communication hole to the mop.
Description
[0001] This application claims the benefit of Korean Patent
Application No. 10-2020-0051421, filed on Apr. 28, 2020, which is
hereby incorporated by reference as if fully set forth herein.
BACKGROUND
Field
[0002] The present disclosure relates to a robot cleaner.
Background
[0003] A person cleans a living space thereof for hygiene and
cleanliness. There are many reasons for the cleaning. For example,
the cleaning may be done to protect a body from disease or to
prevent damage to a bronchus. Further, the cleaning may be done for
a quality of life, such as, for using the space thereof in a clean
state.
[0004] Dust or foreign substances settle on a floor by gravity.
Thus, in order to perform the cleaning, people tend to bend their
waists or sit down, so that it is easy to put a strain on the
waists or joints.
[0005] To this end, in recent years, cleaners that help people
clean have appeared. The cleaners may be roughly classified into a
handy stick cleaner, a bar-type cleaner, a robot cleaner, and the
like.
[0006] Among these, the robot cleaner cleans the space instead of a
user in a specific space such as a home, an office, or the like.
The robot cleaner generally performs the cleaning by suctioning
dust in an area to be cleaned.
[0007] However, it may not be said that the cleaning is completed
by just suctioning the dust. The reason is that there is dust that
is not able to be removed only by a suction power of the robot
cleaner. For example, a foreign substance attached to a floor
surface or dust larger than a suction tube of the robot cleaner are
difficult to be removed with only the suction power of the robot
cleaner.
[0008] According to Chinese Patent No. 104545707, a robot cleaner
in which a roller mop mops a floor surface is disclosed. However,
even in the patent document, there is no specific disclosure about
a method for increasing an area of contact with the floor.
SUMMARY
[0009] According to an embodiment, it is intended to provide a
robot cleaner capable of performing cleaning of suctioning dust on
a traveling surface and cleaning of mopping the traveling
surface.
[0010] Specifically, it is intended to provide a robot cleaner with
a structure of supplying water to a mop by driving a pump by a
rotational movement of a mopping unit.
[0011] Further, it is intended to provide a robot cleaner with a
structure capable of storing water by utilizing an existing
structure.
[0012] Further, it is intended to provide a robot cleaner that may
perform mopping only when the robot cleaner is traveling to prevent
a traveling surface from getting unintentionally dirty.
[0013] As an example for solving the above-described example, a
robot cleaner having a nozzle that automatically supplies water to
a mop by driving a pump with a rotational motion without a motor is
provided.
[0014] Further, provided is a robot cleaner in which a mop roller
operates a gear pump or a diaphragm pump while rotating, thereby
supplying water inside the roller to the outside.
[0015] Further, provided is a robot cleaner in which a mop roller
is always maintained in a state of containing moisture during
cleaning by automatically supplying water only when the mop roller
rotates.
[0016] According to the present embodiment, the water may be
supplied without the motor, so that energy required for the
cleaning may be effectively used.
[0017] Further, because the water is supplied only during the
cleaning, the traveling surface does not get dirty
unnecessarily.
[0018] Further, when a rotational speed of the mopping unit is
adjusted, a water supply amount is adjusted based on the adjustment
of the rotation speed of the mopping unit, so that effective
cleaning is possible.
[0019] Further, a cleaning performance is excellent because the mop
does not dry during the cleaning.
[0020] Further, because there is a water bottle inside a rotating
roller, there is no need for a space to place the water bottle
separately in the robot cleaner.
[0021] Further, when the rotation speed is adjusted, the water
supply amount may also be adjusted.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings, which are included to provide a
further understanding of the disclosure and are incorporated in and
constitute a part of this application, illustrate embodiment(s) of
the disclosure and together with the description serve to explain
the principle of the disclosure. In the drawings:
[0023] FIG. 1 is a perspective view of a robot cleaner according to
an embodiment;
[0024] FIG. 2 is a bottom view of a robot cleaner according to an
embodiment;
[0025] FIG. 3 is a side view of a robot cleaner according to an
embodiment;
[0026] FIG. 4 is a view showing a coupling structure of a mopping
unit according to an embodiment;
[0027] FIG. 5 is a view showing that a pump disposed in a mopping
unit of a robot cleaner is formed as a gear pump;
[0028] FIGS. 6A-6D are views showing various embodiments of a
mopping unit in which a pump is formed as a gear pump;
[0029] FIG. 7 is a view showing that a pump disposed in a mopping
unit of a robot cleaner according to the present embodiment is
provided with a diaphragm pump; and
[0030] FIGS. 8A-8D are views showing various embodiments of a
mopping unit in which a pump is formed as a diaphragm pump.
DESCRIPTION OF SPECIFIC EMBODIMENTS
[0031] Hereinafter, specific embodiments of the present disclosure
will be described with reference to the drawings. A following
detailed description is provided to aid in a comprehensive
understanding of a method, an apparatus, and/or a system described
herein. However, this is only an example, and the present
disclosure is not limited thereto.
[0032] In describing embodiments of the present disclosure, when it
is determined that a detailed description of a known technology
related to the present disclosure may unnecessarily obscure the
subject matter of the present disclosure, a detailed description
thereof will be omitted. In addition, terms to be described later
are terms defined in consideration of functions in the present
disclosure, which may vary depending on intention of a user or an
operator, customs, or the like. Therefore, the definition thereof
should be made based on the contents throughout the present
specification. The terminology used in the detailed description is
for the purpose of describing the embodiments of the present
disclosure only and is not intended to be limiting of the present
disclosure. As used herein, the singular forms "a" and "an" are
intended to include the plural forms as well, unless the context
clearly indicates otherwise. It will be further understood that the
terms "comprises", "comprising", "includes", and "including" when
used in the description, specify the presence of the certain
features, numbers, steps, operations, elements, and portions or
combinations thereof, but do not preclude the presence or addition
of one or more other features, numbers, steps, operations,
elements, and portions or combinations thereof.
[0033] FIG. 1 is a perspective view of a robot cleaner according to
an embodiment. FIG. 2 is a bottom view of a robot cleaner according
to an embodiment. Further, FIG. 3 is a side view of a robot cleaner
according to an embodiment.
[0034] Hereinafter, a structure of a robot cleaner will be
described with reference to FIGS. 1 to 3.
[0035] A robot cleaner 100 according to an embodiment may include a
main body 10, a driver 30 (or driving unit), a cleaning module
housing 41, and a mopping unit 50. Further, the robot cleaner 100
may further include a battery (not shown) for providing electric
power such that the above-described driver and mopping unit may be
electrically driven.
[0036] The battery may be provided as a secondary battery and may
be repeatedly charged and discharged. Thus, a user may use the
robot cleaner by repeatedly charging the battery when a battery
power level is low without having to replace or add a battery.
[0037] When the battery is provided as the secondary battery, the
robot cleaner may further include a charging device (not shown)
that may charge the robot cleaner.
[0038] In another example, the battery may be provided as a dry
battery rather than the secondary battery. In this case, the dry
battery may be required to be replaced when the dry battery is
dead.
[0039] That is, there is no restriction on how the robot cleaner is
provided with the electric power.
[0040] The main body 10 may be disposed to form an exterior of the
robot cleaner 100.
[0041] The main body 10 may include a first housing 101 and a
second housing 102.
[0042] The first housing 101 may form a portion of the main body 10
and may provide a space in which electronic components required for
the robot cleaner 100 or parts required for the robot cleaner are
mounted.
[0043] For example, a controller (not shown) that controls an
operation of the robot cleaner 100 may be mounted in the first
housing 101.
[0044] The controller determines whether to operate the driver 30
and whether to guide water received in a water tank 12, which will
be described later.
[0045] Further, the first housing 101 may be disposed to provide a
flow path (not shown) through which air containing dust is guided
to the dust collector 20 to be described later. That is, the air
suctioned through the cleaning module 40 to be described later may
be guided through an internal space of the first housing 101 to the
dust collector 20.
[0046] The second housing 102 may be disposed in a form of a cover
that covers the first housing 101. However, the second housing 102
is not limited thereto.
[0047] A display (not shown) may be disposed on one surface of the
second housing 102. The display may be formed in a shape of a touch
panel, so that the user may simply enter a command through the
display.
[0048] It is sufficient that the second housing 102 is disposed to
be coupled to the first housing 101. For example, the second
housing 102 may be hinged or integrally formed with the first
housing 101.
[0049] However, it is preferable that the second housing 102 is
separately disposed in consideration of installation convenience of
the parts mounted in the first housing 101. The second housing 102
may prevent the parts mounted in the first housing 101 from being
contaminated or damaged by an outside factor.
[0050] That is, the robot cleaner according to the present
embodiment may be disposed such that the parts mounted in the first
housing 101 are covered by the second housing 102 and not exposed
to the outside. Thus, when the parts are operating, a user's body
may be injured due to user's carelessness, malfunction, or the
like. Thus, the main body 10 may cover the internal parts to
prevent a safety accident. Further, because the main body 10 is
present, a complex interior is not exposed to the outside, thereby
creating a sense of beauty. Thus, the main body 10 may be used as a
design element.
[0051] The cleaning module 40 may be a portion that is coupled to
the main body of the robot cleaner 100 to perform the cleaning.
[0052] The cleaning module 40 may include a cleaning module housing
41 and the mopping unit 50.
[0053] The cleaning module 40 may be disposed to clean a traveling
surface. Specifically, the cleaning module 40 may be disposed to
suction dust present on the traveling surface.
[0054] The traveling surface may be a floor surface. When a carpet
or the like is disposed, the traveling surface may be a top surface
of the carpet.
[0055] The dust may be suctioned into a space provided by the first
housing 101 through the cleaning module housing 41. The suctioned
dust may be collected in the dust collector 20 and air from which
the dust has been removed may be discharged to the outside of the
main body 10.
[0056] The cleaning module housing 41 may be disposed to be coupled
to the main body 10 to provide a space for accommodating the
mopping unit 50 to be described later therein.
[0057] Further, the cleaning module housing 41 may provide a flow
path through which the air containing the dust may be suctioned
such that the dust present on the traveling surface may be
removed.
[0058] The cleaning module housing 41 may include a first cleaning
module housing 41a and a second cleaning module housing 41b.
[0059] Specifically, the first cleaning module housing 41a may
provide the space for accommodating the mopping unit 50 therein as
described above or a space for cleaning the traveling surface.
[0060] The second cleaning module housing 41b may serve to securely
connect the first cleaning module housing 41a to the main body
10.
[0061] Specifically, an external force may be applied to the robot
cleaner 100 or an unexpected shock may occur on the robot cleaner
100 during the travel. In this connection, the first cleaning
module housing 41a is firmly connected to the main body 10 by the
second cleaning module housing 41b, so that a situation in which
the first cleaning housing 41a deviates from an original position
may be prevented.
[0062] In the drawing, the second cleaning module housing 41b is
shown to be disposed at a lower side of the first housing 101, that
is, a surface facing the surface to be cleaned, but is not limited
thereto.
[0063] That is, there is no restriction on a connection
relationship between the cleaning module housing 41 and the main
body 10.
[0064] The robot cleaner 100 may include the driver 30.
[0065] The driver 30 may be disposed to move the main body 10.
[0066] The driver 30 may include a main wheel 31 and a driver motor
32.
[0067] The main wheel 31 may be disposed to be rotated by receiving
electric power by the driver motor 32. Each main wheel 31 may be
disposed on each of both sides of the main body 10.
[0068] The main wheel 31 disposed on one side and the main wheel 31
disposed on the other side may be controlled by different driver
motors 32, respectively. That is, the main wheel 31 disposed on one
side and the main wheel 31 disposed on the other side may be
rotated at different rotational speeds.
[0069] Thus, the robot cleaner 100 may turn in a left or right
direction. Further, the robot cleaner 100 may switch directions in
combination with going straight or going backward.
[0070] That is, a travel speed of the robot cleaner 100 may be
determined based on the rotational speed of the main wheel 31 and a
travel direction may be determined by a difference in rotational
speed of the main wheels 31.
[0071] For example, when the main wheel 31 on the left remains
stationary and the main wheel 31 on the right is rotated, the robot
cleaner 100 may turn to the left. When the main wheels 31 on the
both sides are rotating, but when the main wheel 31 on the right
rotates faster than the main wheel 31 on the left, the robot
cleaner 100 may switch the direction to the left and continue
moving straight.
[0072] The driver 30 may include auxiliary wheels 33 and 34. A
first auxiliary wheel 33 may be disposed at or adjacent to a center
of the robot cleaner 100. The first auxiliary wheel 33 is
positioned adjacent to the center of the robot cleaner 100, thereby
supporting a load of the robot cleaner 100 at the center of the
robot cleaner 100 and simultaneously assisting the travel. Thus,
shaking of the robot cleaner during the travel of the robot cleaner
may be minimized.
[0073] The first auxiliary wheel 33 may be disposed to rotate as
the travel direction of the robot cleaner 100 is switched.
[0074] Thus, the travel may be guided stably even when the robot
cleaner 100 switches the direction while cleaning an area to be
cleaned.
[0075] That is, the first auxiliary wheel 33 may assist the
rotation of the main wheel 31 while supporting the robot cleaner
100.
[0076] A second auxiliary wheel 34 may be disposed in the cleaning
module housing 41. The cleaning module housing 41 is coupled to the
main body 10 to perform the cleaning. The cleaning module housing
41 may be supported by the main body 10 while being coupled to the
main body 10. In another example, a portion of the cleaning module
housing 41 in contact with the traveling surface (or a surface to
be cleaned) may receive a supporting force by the traveling
surface.
[0077] However, because the robot cleaner 100 performs the cleaning
while essentially moving in a region to be cleaned, the cleaning
module housing 41 may not move smoothly during the travel.
[0078] As the second auxiliary wheel 34 is disposed, the cleaning
module housing 41 may be moved more smoothly during the travel of
the robot cleaner 100.
[0079] Each second auxiliary wheel 34 may be disposed on each of
both sides of the cleaning module housing 41 to perform a function
of assisting balancing of the robot cleaner 100.
[0080] The dust collector 20 may be a portion where the dust is
collected. The dust collector 20 may include a cyclone (not shown).
The dust collector 20 may be in communication with the cleaning
module 40.
[0081] The air may be introduced into the robot cleaner by the dust
collector 20. When the air is suctioned by the dust collector 20
and the air from which the dust has been removed is discharged to
the outside, a negative pressure is generated in the robot cleaner
100, so that the air containing the dust may be introduced through
the cleaning module housing 41.
[0082] The dust collector 20 may be formed in a form in which
relatively large dust is primarily separated and then relatively
small dust is secondarily separated. However, the dust collector 20
is not limited thereto and is sufficient when being able to suction
the dust present on the traveling surface.
[0083] The dust collector 20 may be disposed to be detachable from
the main body 10. Thus, when the robot cleaner completes the
cleaning or when excessive dust is accumulated in the dust
collector 20, the user may easily separate the dust collector 20 to
remove the dust, thereby ensuring convenience.
[0084] The sensor unit 11 may be disposed on the main body 10. The
sensor unit 11 may provide image information such that the robot
cleaner 100 may travel in the region to be cleaned.
[0085] That is, the sensor unit 11 may be a camera or a
photographing sensor.
[0086] Specifically, the sensor unit 11 may collect information
necessary for autonomous travel of the robot cleaner 100.
[0087] For example, the sensor unit 11 may include the
photographing sensor that creates a travel map by photographing a
periphery of the robot cleaner 100, an obstacle sensor that senses
an obstacle, and the like. In another example, additional sensors
may be further provided in addition to the above-described
sensor.
[0088] For example, the sensor unit may include a wall sensor (not
shown). Thus, information about the region to be cleaned may be
input to the robot cleaner 100 through the wall sensor, the
photographing sensor, and the like. The robot cleaner 100 may input
a shape of a space during the traveling, and divide the region to
be cleaned through the wall sensor into a plurality of cleaning
areas.
[0089] However, the present disclosure is not limited to the
above-described example, and the above-described example is only
one embodiment. The photographing sensor and the obstacle sensor
may simultaneously perform wall sensing.
[0090] The photographing sensor may be disposed not only to sense
the region to be cleaned, but also to specify a position of the
main body 10 in the region to be cleaned that is previously input.
Thus, a position of the space where the robot cleaner 100 performs
the cleaning may be specified and the position of the robot cleaner
100 is specified, so that movement to a next cleaning area may be
guided.
[0091] A type and the number of sensor units II are not limited.
That is, a plurality of photographing sensors may be arranged, and
when the plurality of photographing sensors are arranged, the
plurality of photographing sensors may be photographing sensors of
the same type or different types.
[0092] The robot cleaner 100 may vary a suction strength of the
dust collector 20 based on a material of the floor. This is because
when the dust collector 20 always suctions the dust at the same
strength, it may be difficult to completely perform the cleaning on
an unusual floor surface such as the carpet and the like.
[0093] The robot cleaner 100 may include a floor sensor (not shown)
to sense the material of the floor. The floor sensor may be a
sensor that senses the material of the floor. The floor sensor may
be disposed in the sensor unit 11 described above, or may be
disposed at a position different from the sensor unit 11.
[0094] The region to be cleaned in which the robot cleaner 100 is
used may vary depending on a case. For example, a floor material of
the region to be cleaned may be marble or a floor paper. Further,
the region to be cleaned may be made of a material other than the
above example.
[0095] Depending on the material of the floor, an intensity at
which the dust collector 20 is driven to effectively suction the
dust may vary.
[0096] Specifically, the dust collector 20 must be driven more
strongly in a carpeted region than on a general floor paper to
effectively perform cleaning. The controller of the robot cleaner
100 may adjust the driving intensity of the dust collector 20 based
on the type of floor material.
[0097] The obstacle sensor may determine whether an obstacle exists
in the region to be cleaned. The obstacle sensor may be disposed
integrally with the sensor unit 11 described above, or may be
disposed separately. That is, the photographing sensor may also
serve as the obstacle sensor.
[0098] As the obstacle sensor senses the obstacle, a travel path of
the robot cleaner 100 may be changed. As a moving line becomes
complicated, battery consumption may vary. Specifically, when the
obstacle is present, the robot cleaner 100 is moved to bypass the
obstacle. At this time, the moving line may be lengthened. As the
moving line lengthens, a battery consumption for cleaning the
corresponding area may increase.
[0099] FIG. 4 is a view showing a coupling structure of a mopping
unit according to an embodiment.
[0100] The mopping unit 50 may be accommodated in the cleaning
module housing 41. Specifically, a mopping unit receiving portion
42 may be accommodated in the cleaning module housing 41, and the
mopping unit 50 may be accommodated in the mopping unit receiving
portion 42.
[0101] The mopping unit 50 may be seated on the mopping unit
receiving portion 42. The mopping unit receiving portion 42 may be
formed as a portion of the cleaning module housing 41 or may be
mounted inside the cleaning module housing.
[0102] The mopping unit receiving portion 42 may include a mopping
unit receiving portion housing 420 that determines an exterior of
the mopping unit receiving portion 42. The mopping unit receiving
portion housing 420 may provide a receiving space 421 therein to
accommodate the mopping unit 50 therein.
[0103] The mopping unit receiving portion 42 may include a mop
sensing portion 422 that determines whether the mop 52 surrounds
the body 51. When the mop sensing portion 422 determines whether
the mop 52 is mounted, whether to supply water toward the mop 52
may be determined.
[0104] A climbing preventing portion 423 may be disposed on the
mopping unit receiving portion 42. The climbing preventing portion
423 may extend forwardly of the cleaning module housing 41. The
climbing preventing portion 423 is disposed to prevent a movement
to a stepped terrain.
[0105] The climbing preventing portion 423 may extend forwardly of
the robot cleaner 100 at a portion where the mopping unit receiving
portion 42 and the traveling surface are in contact with each
other.
[0106] In other words, the climbing preventing portion 423 may
extend in the travel direction of the robot cleaner 100 from a
surface of the mopping unit receiving portion 42 facing the
traveling surface.
[0107] The climbing preventing portion 423 may protrude outwardly
of the cleaning module housing 41. Specifically, the climbing
preventing portion 423 may protrude forwardly of the cleaning
module housing 41. More specifically, the climbing preventing
portion 423 may protrude forwardly of a portion of the cleaning
module housing 41 adjacent to the traveling surface.
[0108] The climbing preventing portion 423 prevents the robot
cleaner 100 from entering an area that is not the same height as
the traveling surface such as a carpet and the like during the
traveling.
[0109] In general, the robot cleaner is used in a space where a
height of the traveling surface is constant except in unusual cases
in a home, a company, and the like. Even when the robot cleaner is
used in the space where the height of the traveling surface is
constant, there may be cases where the carpet is laid or a
threshold or the like is formed depending on a user's
preference.
[0110] Because the robot cleaner 100 according to the present
embodiment is capable of traveling while mopping, it is not
desirable that the mop 52 is operated while the robot cleaner 100
travels on a top surface of the carpet or the like.
[0111] A plurality of climbing preventing portions 423 may be
arranged on the mopping unit receiving portion 42. Thus, climbing
may be prevented not only when the robot cleaner 100 encounters a
portion having a different height of the traveling surface while
moving straight, but also when the robot cleaner 100 encounters a
portion having a different height of the traveling surface while
moving in a certain direction. Thus, the operation of the mop 52
may not be disturbed by the traveling surface. A pump 60 may be
coupled to the mopping unit 50. The pump 60 may include a rotation
preventing member 62 that prevents the pump 60 from rotating
despite a rotation of the body 51.
[0112] The robot cleaner 100 according to the present embodiment
may guide, through the pump 60, water to the mop 52 without a
separate component such as a motor and the like. When the robot
cleaner 100 travels, the rotation of the body 51 is inevitable.
Thus, the water may be guided to the mop 52 in response to the
rotation of the body 51 when the pump 60 is fixed.
[0113] Thus, the robot cleaner 100 may be prevented from becoming
excessively large, and the mopping may be performed with only the
travel of the robot cleaner without additional energy
consumption.
[0114] A detailed description of the pump 60 will be described
later.
[0115] The mopping unit 50 may include the body 51 and the mop
52.
[0116] The mopping unit 50 is accommodated in the cleaning module
housing 41 to clean the traveling surface traveled by the robot
cleaner 100.
[0117] Specifically, the mopping unit 50 may remove the dust and
foreign substances while mopping the traveling surface, aside from
the dust being suctioned into the robot cleaner 100 by the dust
collector 20.
[0118] That is, the mopping unit 50 may play a role of introducing
the dust into the dust collector 20 by scattering the dust on the
traveling surface when the mop 52 is removed. Further, the mopping
unit 50 may remove the dust and the foreign substances by mopping
the floor together with the mop 52 when the mop 52 is mounted.
[0119] The dust present on the traveling surface may not be
completely removed by the suction of the dust collector 20. Thus,
the mopping unit 50 is disposed to remove the dust remaining on the
traveling surface.
[0120] The mopping unit 50 may be accommodated in the space
provided by the cleaning module housing 41 and may be combined with
the cleaning module housing 41. Thus, the mopping unit 50 may be
prevented from being displaced from the original position while
mopping the floor.
[0121] The mopping unit 50 may include the body 51 disposed in the
cleaning module housing 41. Specifically, the body 51 may be
coupled to the cleaning module housing 41 to support the mopping
unit 50.
[0122] The body 51 may be formed in a circular shape. The body 51
may rotate naturally as the robot cleaner 100 travels and scatter
the dust on the traveling surface to assist the dust collector 20
to collect the dust or to perform the cleaning by mopping the
traveling surface.
[0123] The body 51 may be hollowed. As described later, this is to
dispose a water tank 53 in the body 51 and accommodate water in the
water tank 53 or to accommodate the water in the body 51.
[0124] The body 51 may be a portion that determines an exterior of
the mopping unit 50. Because the mop 52 is disposed to surround the
body 51, the mop 52 may be combined to the body 51 based on a shape
of the body 51.
[0125] The mop 52 may be made of a material that may contain
moisture. This is to maximize an effect of the cleaning by
receiving the moisture by a water supply passage 54 to be described
later.
[0126] The mop 52 may be disposed to be detachable from the body
51. The user may or may not wish to mop when using the robot
cleaner. Thus, it is preferable that the mop 52 is able to be
detached from the robot cleaner 100 based on selection of the
user.
[0127] Further, when the mop 52 is formed integrally with the robot
cleaner 100, after the cleaning, the mop 52 in a contaminated state
has to be reused. Further, even when the mop 52 is cleaned, there
may be difficulties in the cleaning due to a structure of the robot
cleaner 100. Thus, the mop 52 is preferably detachable.
[0128] There is no restriction on how the mop 52 surrounds the body
51.
[0129] For example, both ends of the mop 52 may be repeatedly
attached to or detached from each other, or a component for
mounting the mop 52 on the body 51 may be additionally
disposed.
[0130] FIG. 5 is a view showing that a pump disposed in a mopping
unit of a robot cleaner is formed as a gear pump.
[0131] The pump 60 may be coupled to the mopping unit 50. The pump
60 may include a pump housing 61 that forms an exterior of the pump
60 and is coupled to the body 51.
[0132] Shapes and the number of covers are not limited to shapes
and the number of covers shown in the drawing.
[0133] A water supply 63 may be disposed in the pump housing 61.
The water supply 63 may not be operated with electrical power such
as a separate motor, but may be provided to guide water toward the
mop 52 in response to the rotation of the mopping unit 50.
[0134] According to an embodiment in which the pump 60 is formed as
a gear pump, a communication hole 633 in communication with the
body 51 or the water tank 53 may be defined in the pump housing 61.
That is, the communication hole 633 may be defined to allow water
to flow into the pump 60.
[0135] The communication hole 633 may be defined in the pump
housing 61 closer to a circumference than a rotation center of the
mopping unit 50. This is because as the body 51 is rotated, the
water accommodated in the body 51 or the water tank 53 is
positioned at an inner surface of the body 51 by a centrifugal
force.
[0136] Specifically, when an amount of water accommodated is large,
the position of the communication hole 633 is not a problem.
However, when the amount of water decreases as the cleaning
progresses to some extent or when a small amount of water is
initially injected, the water accommodated in the water tank 53 or
the body 51 is biased toward the traveling surface by gravity.
[0137] However, even when the amount of water accommodated in the
body 51 or the water tank 53 is small, the water is biased toward
the inner surface of the body 51 or the water tank 53 as the body
51 rotates, so that it is preferable that the communication hole
633 is defined adjacent to the inner surface of the body 51.
[0138] The water supply 63 may include a first gear 631 and a
second gear 632.
[0139] The first gear 631 is a gear that rotates as the body 51
rotates. The first gear may rotate about a rotation center of the
body 51.
[0140] The second gear 632 may be a gear that meshes with the first
gear 631 and guides the water introduced into the communication
hole 633 toward the mop.
[0141] The second gear 632 may be disposed such that at least some
of teeth thereof overlap the communication hole 633. Thus, the
water introduced into the communication hole 633 may be guided to
the mop 52 through the pump 60.
[0142] The pump housing 61 may include a guide member 634 for
assisting the flow of water.
[0143] When the water flows into the pump housing 61 through the
communication hole 633, the water is guided by the water supply 63.
However, in order to stably guide the water to the water supply
passage 54 to be described later, it is advantageous to have the
guide member 634 protruding inwardly of the pump housing 61.
[0144] That is, the guide member 634 may guide the water introduced
into the communication hole 633 to the water supply passage 54,
thereby smoothly supplying the water.
[0145] The water supply passage 54 may include a first water supply
passage 541 and a second water supply passage 542.
[0146] The first water supply passage 541 is a passage in
communication with the pump housing 61 and through which the water
guided by the first gear 631 and the second gear 632 is discharged
out of the pump housing 61.
[0147] The first water supply passage 541 may be in communication
with the pump housing 61.
[0148] The second water supply passage 542 may be a portion in
communication with the first water supply passage 541 and in
communication with the mop 52.
[0149] Specifically, the second water supply passage 542 may branch
in a longitudinal direction of the body 51 to guide the water
discharged from the first water supply passage 541 to the mop
52.
[0150] The number of branched passages may vary. That is, two
second water supply passages 542 are shown in the drawing, but the
number of second water supply passages is not limited thereto.
[0151] It is preferable that the second water supply passage 542 is
branched to both sides of the body 51 to be in communication with
the mop 52. Because the body 51 is preferably formed in a
cylindrical shape, in order to guide the water evenly over the mop
52, it is advantageous that the number of branched passages is
large and that the passages are evenly branched.
[0152] FIGS. 6A-6D are views showing various embodiments of a
mopping unit in which a pump is formed as a gear pump.
[0153] Specifically, FIG. 6A is a view showing a shape in which the
water is accommodated in the body 51, FIG. 6B is a view showing a
shape in which the water tank 53 is accommodated in the body 51.
Further, FIG. 6C is a view showing a shape in which a water inlet
55 is defined in the body 51, and FIG. 6D is a view showing a shape
in which the water inlet and the water tank are respectively
defined and disposed in the body 51.
[0154] In FIGS. 6A-6D, the body is shown in an opened shape for
clear understanding.
[0155] Referring to FIG. 6A, the pump 60 is formed as a gear pump
and a shape in which the water is accommodated in the body 51 is
shown. The pump 60 may be disposed on one side of the body 51 and a
cap 56 may be disposed on the other side of the body 51.
[0156] The cap 56 may be formed as a twist cap. Thus, the body 51
may be opened or closed by rotating the cap 56.
[0157] Further, when the cap 56 is formed as the twist cap, a
fastening force becomes stronger as the number of rotations of the
cap 56 increases, and thus a shielding performance may become
excellent.
[0158] Further, as the cap 56 is disposed, it is convenient to
simply supply the water into the body 51 or keep the supplied water
in a state of being accommodated in the body 51.
[0159] Referring to FIG. 6B, the pump 60 is formed as the gear pump
and a case in which the water tank 53 is separately formed in the
body 51 is shown.
[0160] Hereinafter, a description of a portion overlapping with
FIG. 6A will be omitted. However, it is clear that the portion
described in FIG. 6A is not excluded.
[0161] Referring to FIG. 6B, the water tank 53 may be formed
separately from the body 51.
[0162] When the water tank 53 is formed separately from the body
51, a size of the water tank 53 may be smaller than a size of the
body 51. However, because the water is not directly accommodated in
the body 51, a shape of the water tank 53 may be changed, so that a
structure of the pump 60 may be designed optimally.
[0163] In another example, even when the water tank 53 is disposed,
the cap 56 may be disposed.
[0164] Referring to FIG. 6C, it is shown that the pump 60 is formed
as the gear pump and a water inlet 55 is defined in the body 51
instead of the cap 56 being disposed on the other side.
[0165] When the water inlet 55 is defined in the body 51, the water
may be easily injected into the body 51 even when the mopping unit
50 is not removed from the cleaning module housing 41. Because the
mopping unit 50 is coupled to the cleaning module housing 41 or the
mopping unit receiving portion 42, when the mopping unit 50 is
formed such that the water is injected through an end thereof, the
mopping unit 50 must be removed from the robot cleaner 100 to
supply the water to the mopping unit 50.
[0166] However, when the water inlet 55 is defined in the body 51,
the water may be supplied without removing the mopping unit 50 from
the robot cleaner 100.
[0167] Referring to FIG. 6D, even when the water inlet 55 is
defined, the water tank 53 may be included. In this case, the water
inlet 55 may be defined to be in communication with the water tank
53.
[0168] FIG. 7 is a view showing that a pump disposed in a mopping
unit of a robot cleaner according to the present embodiment is
provided with a diaphragm pump.
[0169] Hereinafter, a portion different from that in FIG. 5 will be
described. A description of a portion the same as that in FIG. 5
will be omitted.
[0170] A diaphragm pump is a membrane pump, which may be operated
as the body 51 rotates. The water supply 63 may be formed as the
diaphragm pump. Thus, the water may be guided to the mop 52 as the
body 51 rotates.
[0171] When the body 51 is rotated and the pump 60 is not rotated,
the water supply 63 may be operated.
[0172] Specifically, as the body 51 rotates, a diaphragm of the
diaphragm pump contracts and relaxes. As the contraction and the
relaxation repeats, the water contained in the body 51 may flow
into the pump 60 and then may be guided to the mop 52.
[0173] When the pump 60 is formed as the diaphragm pump, the pump
60 may include an inlet tube 64 and an outlet tube 65.
[0174] The inlet tube 64 may be a portion where the water is guided
from the water tank 53 or the body 51 to the water supply 63. In
this case, as the body 51 rotates, a negative pressure is generated
inside the water supply 63 and the water is suctioned. Further, as
the body 51 rotates, a pressure is applied to the water supply 63,
so that the water may be discharged to the mop 52.
[0175] The inlet tube 64 may be disposed adjacent to the inner
surface of the body 51. That is, the inlet tube 64 may be
positioned closer to an inner circumferential surface than the
rotation center of the body 51.
[0176] The inlet tube 64 is disposed adjacent to the inner surface
because the water is biased toward the inner surface by a
centrifugal force as the body 51 rotates, so that even when a small
amount of water is accommodated, the water may be supplied smoothly
to the mop 52.
[0177] When the inlet tube 64 is in communication with the water
supply 63 and is in communication with the water tank 53 when the
water tank 53 is disposed, and when the water is accommodated in
the body 51, the inlet tube 64 may be in communication with the
body 51.
[0178] The outlet tube 65 may be in communication with the water
supply 63 and in communication with the mop 52. The outlet tube 65
guides the water discharged from the water supply 63 to the mop 52.
In the drawing, the outlet tube 65 is illustrated as being branched
in two tubes, but is not limited thereto.
[0179] In order to supply the water evenly to the mop 52, it is
preferable that the outlet tube 65 is branched into several tubes.
However, in consideration of a flow resistance, the outlet tube 65
may be disposed to be branched in an appropriate number of
tubes.
[0180] FIGS. 8A-8D are views showing various embodiments of a
mopping unit in which a pump is formed as a diaphragm pump.
[0181] Specifically, FIG. 8A is a view showing a shape in which the
water is accommodated in the body 51, and FIG. 8B is a view showing
a shape in which the water tank 53 is accommodated in the body 51.
FIG. 8C is a view showing a shape in which the water inlet 55 is
defined in the body 51, and FIG. 8D is a view showing a shape in
which the water inlet and the water tank are respectively defined
and disposed in the body 51.
[0182] In FIGS. 8A-8D, the body is shown in the opened shape for
clear understanding.
[0183] Referring to FIG. 8A, the pump 60 is formed as the diaphragm
pump and a shape in which the water is accommodated in the body 51
is shown. The pump 60 may be disposed on one side of the body 51
and the cap 56 may be disposed on the other side of the body
51.
[0184] The cap 56 may be formed as the twist cap. Thus, the body 51
may be opened or closed by rotating the cap 56.
[0185] Further, when the cap 56 is formed as the twist cap, the
fastening force becomes stronger as the number of rotations of the
cap 56 increases, and thus the shielding performance may become
excellent.
[0186] Further, as the cap 56 is disposed, it is convenient to
simply supply the water into the body 51 or keep the supplied water
in the state of being accommodated in the body 51.
[0187] Referring to FIG. 8B, the pump 60 is formed as the gear pump
and a case in which the water tank 53 is separately formed in the
body 51 is shown.
[0188] Hereinafter, a description of a portion overlapping with
FIG. 8A will be omitted. However, it is clear that the portion
described in FIG. 8A is not excluded.
[0189] Referring to FIG. 8B, the water tank 53 may be formed
separately from the body 51.
[0190] When the water tank 53 is formed separately from the body
51, the size of the water tank 53 may be smaller than the size of
the body 51. However, because the water is not directly
accommodated in the body 51, the shape of the water tank 53 may be
changed, so that the structure of the pump 60 may be designed
optimally.
[0191] In another example, even when the water tank 53 is disposed,
the cap 56 may be disposed.
[0192] Referring to FIG. 8C, it is shown that the pump 60 is formed
as the gear pump and the water inlet 55 is defined in the body 51
instead of the cap 56 being disposed on the other side.
[0193] When the water inlet 55 is defined in the body 51, the water
may be easily injected into the body 51 even when the mopping unit
50 is not removed from the cleaning module housing 41. Because the
mopping unit 50 is coupled to the cleaning module housing 41 or the
mopping unit receiving portion 42, when the mopping unit 50 is
formed such that the water is injected through the end thereof, the
mopping unit 50 must be removed from the robot cleaner 100 to
supply the water to the mopping unit 50.
[0194] However, when the water inlet 55 is defined in the body 51,
the water may be supplied without removing the mopping unit 50 from
the robot cleaner 100.
[0195] Referring to FIG. 8D, even when the water inlet 55 is
defined, the water tank 53 may be included. In this case, the water
inlet 55 may be defined to be in communication with the water tank
53.
[0196] Although the exemplary embodiments of the present disclosure
have been described above in detail, those of ordinary skill in the
art to which the present disclosure pertains will appreciate that
various modifications are possible within the limits without
departing from the scope of the present disclosure for the
above-described embodiments. Therefore, the scope of the present
disclosure should not be limited to the described embodiments, and
should be determined not only by the claims to be described later,
but also by the equivalents of the claims.
* * * * *