U.S. patent application number 16/755006 was filed with the patent office on 2020-10-01 for washing machine and method for controlling same.
The applicant listed for this patent is Samsung Electronics Co., Ltd.. Invention is credited to Eun-suk BANG, Sang-yeon PYO, Ji-hyun WOO.
Application Number | 20200308750 16/755006 |
Document ID | / |
Family ID | 1000004931821 |
Filed Date | 2020-10-01 |
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United States Patent
Application |
20200308750 |
Kind Code |
A1 |
WOO; Ji-hyun ; et
al. |
October 1, 2020 |
WASHING MACHINE AND METHOD FOR CONTROLLING SAME
Abstract
Disclosed are a washing machine and a method for controlling
same. A washing machine according to the present invention
comprises: a drum for accommodating laundry; an additive input unit
which inputs an additive into the drum so as to coat the laundry
with fragrant particles; a temperature adjustment unit which
generates a hot wind and a cold wind to adjust the temperature
inside the drum; and a control unit that controls the temperature
adjustment unit so that the temperature inside the drum is set to a
first threshold temperature, controls the additive input unit so
that the additive is input into the drum when the temperature is
set to the first threshold temperature, and controls the
temperature adjustment unit so that the temperature inside the drum
is set to a second threshold temperature lower than the first
threshold temperature when the additive is input into the drum.
Accordingly, the washing machine can provide the same effect as a
piece of laundry being washed in a normal washing cycle when
laundry is washed through a refresh cycle.
Inventors: |
WOO; Ji-hyun; (Seoul,
KR) ; PYO; Sang-yeon; (Yongin-Si, KR) ; BANG;
Eun-suk; (Hwaseong-Si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Samsung Electronics Co., Ltd. |
Suwon-si |
|
KR |
|
|
Family ID: |
1000004931821 |
Appl. No.: |
16/755006 |
Filed: |
October 10, 2018 |
PCT Filed: |
October 10, 2018 |
PCT NO: |
PCT/KR2018/011858 |
371 Date: |
April 9, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D06F 2105/42 20200201;
D06F 2105/38 20200201; D06F 2103/24 20200201; D06F 33/37 20200201;
D06F 2103/26 20200201; D06F 23/02 20130101; D06F 39/04 20130101;
D06F 2105/48 20200201; D06F 2105/14 20200201 |
International
Class: |
D06F 33/37 20060101
D06F033/37; D06F 39/04 20060101 D06F039/04; D06F 23/02 20060101
D06F023/02 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 13, 2017 |
KR |
10-2017-0133527 |
Claims
1. A washing machine comprising: a drum configured to accommodate
laundry; an additive input unit configured to put an additive into
the drum to coat the laundry with fragrant particles; a temperature
adjustment unit configured to adjust a temperature inside the drum
by generating hot air and cold air; and a control unit configured
to: control the temperature adjustment unit to set the temperature
inside the drum to a first threshold temperature, control the
additive input unit to put the additive into the drum in case that
the temperature inside the drum is set to the first threshold
temperature, and control the temperature adjustment unit to set the
temperature inside the drum to a second threshold temperature lower
than the first threshold temperature in case that the additive is
put into the drum.
2. The washing machine as claimed in claim 1, wherein the control
unit is configured to rotate the drum at a first threshold speed
while the temperature inside the drum is set and maintained at the
first threshold temperature or the second threshold
temperature.
3. The washing machine as claimed in claim 2, wherein the control
unit is configured to rotate the drum at a second threshold speed
faster than the first threshold speed before the additive is put
into the drum, and control the additive input unit to put the
additive into the drum in case that a rotational speed of the drum
reaches the second threshold speed.
4. The washing machine as claimed in claim 3, further comprising a
detection unit configured to detect vibration of the washing
machine, wherein the control unit is configured to end the rotation
of the drum and then rotate the drum again at the second threshold
speed in case that vibration intensity detected by the detection
unit is equal to or greater than predetermined threshold intensity
before the rotational speed of the drum reaches the second
threshold speed.
5. The washing machine as claimed in claim 4, wherein the control
unit is configured to control the additive input unit not to put
the additive into the drum in case that the vibration intensity
detected by the detection unit is equal to or greater than the
predetermined threshold intensity after the drum is rotated again
for a predetermined threshold number of times.
6. The washing machine as claimed in claim 3, wherein the control
unit is configured to control the additive input unit to put the
additive into the drum in case that the rotational speed of the
drum reaches the second threshold speed within a predetermined
threshold time.
7. The washing machine as claimed in claim 3, wherein the control
unit is configured to control the temperature adjustment unit to
maintain the first threshold temperature for a first threshold time
and rotate the drum at the second threshold speed faster than the
first threshold speed after the first threshold time.
8. The washing machine as claimed in claim 7, wherein the control
unit is configured to control the temperature adjustment unit to
maintain the second threshold temperature for the second threshold
time less than the first threshold time after all the additive is
put into the drum.
9. The washing machine as claimed in claim 8, wherein the control
unit is configured to control the temperature adjustment unit to
set the temperature inside the drum to a third threshold
temperature lower than the second threshold temperature after the
second threshold time, and rotate the drum at the first threshold
speed while the temperature inside the drum is set and maintained
at the third threshold temperature.
10. The washing machine as claimed in claim 9, further comprising a
drainage unit, wherein the control unit is configured to control
the drainage unit to discharge the additive contained in the drum
to an outside before the temperature inside the drum is set to the
third threshold temperature.
11. A method for controlling a washing machine comprising: setting
a temperature inside a drum to a first threshold temperature
through a temperature adjustment unit configured to adjust the
temperature inside the drum accommodating laundry by generating hot
air and cold air; putting an additive into the drum to coat the
laundry with fragrant particles in case that the temperature inside
the drum is set to the first threshold temperature; and setting the
temperature inside the drum to a second threshold temperature lower
than the first threshold temperature through the temperature
adjustment unit in case that the additive is put into the drum.
12. The method for controlling a washing machine as claimed in
claim 11, wherein the drum is rotated at a first threshold speed
while the temperature inside the drum is set and maintained at the
first threshold temperature or the second threshold
temperature.
13. The method for controlling a washing machine as claimed in
claim 12, further comprising rotating the drum at a second
threshold speed faster than the first threshold speed before the
additive is put into the drum, wherein in the putting of the
additive into the drum, the additive is put into the drum in case
that a rotational speed of the drum reaches the second threshold
speed.
14. The method for controlling a washing machine as claimed in
claim 13, wherein in the rotating of the drum at the second
threshold speed, the rotation of the drum is ended and the drum is
rotated again at the second threshold speed in case that vibration
intensity due to the rotation of the drum is equal to or greater
than predetermined threshold intensity before the rotational speed
of the drum reaches the second threshold speed.
15. The method for controlling a washing machine as claimed in
claim 14, wherein in the putting of the additive into the drum, the
additive is not put into the drum in case that the detected
vibration intensity is equal to or greater than the predetermined
threshold intensity after the drum is rotated again for a
predetermined threshold number of times.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a 371 of International Application No.
PCT/KR2018/011858 filed on Oct. 10, 2018, which claims priority to
Korean Patent Application No. 10-2017-0133527 filed on Oct. 13,
2017, the disclosures of which are herein incorporated by reference
in their entirety.
BACKGROUND
1. Field
[0002] The disclosure relates to a washing machine and a method for
controlling the same, and more particularly to, a washing machine
for sterilizing laundry through a refresh cycle and a method for
controlling the same.
2. Description of Related Art
[0003] In general, a drum type washing machine may provide a
washing cycle for washing laundry and a drying cycle for drying the
washed laundry.
[0004] In addition, a recent drum type washing machine may provide
a refresh cycle function in addition to the cycles described above.
The refresh cycle function may wash the laundry without water
washing the laundry by using a detergent as in the washing
cycle.
[0005] That is, the refresh cycle function may sterilize and dry
the laundry at a high temperature to deodorize a smell permeating
the laundry. The laundry may be prevented from being damaged by
having a reduced number of water washings due to this refresh
cycle.
[0006] However, the recently developed refresh cycle function may
simply sterilize and dry the laundry. Therefore, even though washed
through the refresh cycle function, the laundry may have a limit in
having the same effect as the laundry washed using additives such
as a fabric softener in a normal washing cycle.
[0007] The disclosure provides laundry washed in a refresh cycle
with the same effect as laundry washed in a normal washing
cycle.
SUMMARY
[0008] According to an embodiment of the disclosure, a washing
machine includes: a drum configured to contain laundry; an additive
input unit configured to put an additive into the drum to coat the
laundry with fragrant particles; a temperature adjustment unit
configured to adjust a temperature inside the drum by generating
hot air and cold air; and a control unit configured to: control the
temperature adjustment unit to set the temperature inside the drum
to a first threshold temperature, control the additive input unit
to put the additive into the drum in case that the temperature
inside the drum is set to the first threshold temperature, and
control the temperature adjustment unit to set the temperature
inside the drum to a second threshold temperature lower than the
first threshold temperature in case that the additive is put into
the drum.
[0009] In addition, the control unit may be configured to rotate
the drum at a first threshold speed while the temperature inside
the drum is set and maintained at the first threshold temperature
or the second threshold temperature.
[0010] In addition, the control unit may be configured to rotate
the drum at a second threshold speed faster than the first
threshold speed before the additive is put into the drum, and
control the additive input unit to put the additive into the drum
in case that a rotational speed of the drum reaches the second
threshold speed.
[0011] In addition, the washing machine may further include a
detection unit configured to detect vibration of the washing
machine, wherein the control unit may be configured to end the
rotation of the drum and then rotate the drum again at the second
threshold speed in case that vibration intensity detected by the
detection unit is equal to or greater than predetermined threshold
intensity before the rotational speed of the drum reaches the
second threshold speed.
[0012] In addition, the control unit may be configured to control
the additive input unit not to put the additive into the drum in
case that the vibration intensity detected by the detection unit is
equal to or greater than the predetermined threshold intensity
after the drum is rotated again for a predetermined threshold
number of times.
[0013] In addition, the control unit may be configured to control
the additive input unit to put the additive into the drum in case
that the rotational speed of the drum reaches the second threshold
speed within a predetermined threshold time.
[0014] In addition, the control unit may be configured to control
the temperature adjustment unit to maintain the first threshold
temperature for a first threshold time and rotate the drum at the
second threshold speed faster than the first threshold speed after
the first threshold time.
[0015] In addition, the control unit may be configured to control
the temperature adjustment unit to maintain the second threshold
temperature for the second threshold time less than the first
threshold time after all the additive is put into the drum.
[0016] In addition, the control unit may be configured to control
the temperature adjustment unit to set the temperature inside the
drum to a third threshold temperature lower than the second
threshold temperature after the second threshold time, and rotate
the drum at the first threshold speed while the temperature inside
the drum is set and maintained at the third threshold
temperature.
[0017] In addition, the washing machine may further include a
drainage unit, wherein the control unit may be configured to
control the drainage unit to discharge the additive contained in
the drum to an outside before the temperature inside the drum is
set to the third threshold temperature.
[0018] Meanwhile, according to another embodiment of the
disclosure, a method for controlling a washing machine includes:
setting a temperature inside a drum to a first threshold
temperature through a temperature adjustment unit configured to
adjust the temperature inside the drum accommodating laundry by
generating hot air and cold air; putting an additive into the drum
to coat the laundry with fragrant particles in case that the
temperature inside the drum is set to the first threshold
temperature; and setting the temperature inside the drum to a
second threshold temperature lower than the first threshold
temperature through the temperature adjustment unit in case that
the additive is put into the drum.
[0019] In addition, the drum may be rotated at a first threshold
speed while the temperature inside the drum is set and maintained
at the first threshold temperature or the second threshold
temperature.
[0020] In addition, the method for controlling a washing machine
may further include rotating the drum at a second threshold speed
faster than the first threshold speed before the additive is put
into the drum, wherein in the putting of the additive into the
drum, the additive is put into the drum in case that a rotational
speed of the drum reaches the second threshold speed.
[0021] In addition, in the rotating of the drum at the second
threshold speed, the rotation of the drum may be ended and the drum
may be rotated again at the second threshold speed in case that
vibration intensity due to the rotation of the drum is equal to or
greater than predetermined threshold intensity before the
rotational speed of the drum reaches the second threshold
speed.
[0022] In addition, in the putting of the additive into the drum,
the additive may not be put into the drum in case that the detected
vibration intensity is equal to or greater than the predetermined
threshold intensity after the drum is rotated again for a
predetermined threshold number of times.
[0023] In addition, in the putting of the additive into the drum,
the additive may be put into the drum in case that the rotational
speed of the drum reaches the second threshold speed within a
predetermined threshold time.
[0024] In addition, in the setting of the temperature inside the
drum to the first threshold temperature, the temperature inside the
drum may be set to be maintained at the first threshold temperature
for a first threshold time, and in the rotating of the drum at the
second threshold speed, the drum may be rotated at the second
threshold speed faster than the first threshold speed after the
first threshold time.
[0025] In addition, in the setting of the temperature inside the
drum to the second threshold temperature, the temperature inside
the drum may be set to be maintained at the second threshold
temperature for a second threshold time less than the first
threshold time.
[0026] In addition, the method for controlling a washing machine
may further include setting the temperature inside the drum to a
third threshold temperature lower than the second threshold
temperature through the temperature adjustment unit after the
second threshold time, wherein the drum may be rotated at the first
threshold speed while the temperature inside the drum is set and
maintained at the third threshold temperature.
[0027] In addition, the method for controlling a washing machine
may further include discharging the additive contained in the drum
to an outside through a drainage unit before the temperature inside
the drum is set to the third threshold temperature.
[0028] As set forth above, according to the disclosure, the washing
machine may provide the laundry washed in the refresh cycle with
the same effect as the laundry washed in the normal washing
cycle.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] FIG. 1 is a perspective view showing an appearance of a
washing machine according to an embodiment of the disclosure;
[0030] FIG. 2 is a side cross-sectional view showing an inside of
the washing machine according to an embodiment of the
disclosure;
[0031] FIG. 3 is an exploded perspective view of a temperature
adjustment unit according to an embodiment of the disclosure;
[0032] FIG. 4 is a block diagram showing the washing machine
performing a refresh cycle according to an embodiment of the
disclosure;
[0033] FIG. 5 is a detailed block diagram of the washing machine
according to an embodiment of the disclosure;
[0034] FIG. 6 is an exemplary view showing processes of the washing
machine performing the refresh cycle according to an embodiment of
the disclosure;
[0035] FIG. 7 is an exemplary view showing an operation of each
component for each process of the refresh cycle performed in the
washing machine according to an embodiment of the disclosure;
[0036] FIG. 8 is an exemplary view showing that the washing machine
provides a user interface (UI) based on occurrence of an event
according to an embodiment of the disclosure;
[0037] FIG. 9 is a flowchart showing a method of a washing machine
to perform a refresh cycle according to an embodiment of the
disclosure;
[0038] FIG. 10 is a first flowchart showing a method of the washing
machine to determine whether to put an additive into a drum
according to an embodiment of the disclosure; and
[0039] FIG. 11 is a second flowchart showing a method of the
washing machine to determine whether to put an additive into a drum
according to according to another embodiment of the disclosure.
DETAILED DESCRIPTION
[0040] Hereinafter, various embodiments of the disclosure are
described with reference to the accompanying drawings. However, it
is to be understood that technologies mentioned in the disclosure
are not limited to specific embodiments, but include various
modifications, equivalents, and/or alternatives according to
embodiments of the disclosure. Throughout the accompanying
drawings, similar components are denoted by similar reference
numerals.
[0041] In addition, expressions, "first", "second" or the like,
used in the disclosure may indicate various components regardless
of a sequence and/or importance of the components, are used only to
distinguish one component from the other components, and do not
limit the corresponding components. For example, a `first portion`
and a `second portion` may indicate different portions regardless
of a sequence or importance. For example, a first component may be
named a second component and the second component may also be
similarly named the first component, without departing from the
scope of the disclosure.
[0042] In addition, terms used in the disclosure may be used only
to describe specific embodiments rather than restricting the scope
of other embodiments. Singular forms may include plural forms
unless the context clearly indicates otherwise. Terms used in the
specification including technical and scientific terms have the
same meanings as those that are generally understood by those
skilled in the art to which the disclosure pertains. Terms defined
by a general dictionary among terms used in the disclosure may be
interpreted as meanings that are the same as or similar to meanings
within a context of the related art, and are not interpreted as
ideal or excessively formal means unless clearly defined in the
disclosure. In some cases, terms may not be interpreted to exclude
embodiments of the disclosure even though they are defined in the
disclosure.
[0043] FIG. 1 is a perspective view showing an appearance of a
washing machine according to an embodiment of the disclosure; and
FIG. 2 is a side cross-sectional view showing an inside of the
washing machine according to an embodiment of the disclosure.
[0044] As shown in FIGS. 1 and 2, a washing machine 100 may
include: a main body 10 forming its appearance; a tub 15 configured
to contain water used for washing; a drum 20 configured to
accommodate laundry and wash the laundry through rotation; a drive
unit 30 configured to rotate the drum 20; a water supply unit 40
configured to supply the water to the tub 15; a drainage unit 50
configured to discharge the water contained in the tub 15 to an
outside of the washing machine 100; an additive input unit 60
configured to put an additive into the drum; a temperature
adjustment unit 70 configured to adjust a temperature of air inside
the drum 20 to dry the laundry accommodated in the drum 20; and a
filter unit 80 configured to filter lint occurring from the laundry
accommodated in the drum 20.
[0045] In addition, the washing machine 100 may include a control
unit 120. The control unit 120, as described above, may control an
overall operation of each component for washing, drying and refresh
cycles of the laundry accommodated in the drum 20. Here, the
refresh cycle is a cycle for sterilizing and deodorizing the
laundry accommodated in the drum 20 without performing the washing
cycle.
[0046] Meanwhile, an inlet 11 may be formed in a center of a front
surface of the main body 10 to put into or take the laundry out of
the drum 20, and a door 13 may be provided to the inlet 11 for
opening and closing the inlet 11. The door 13 may be pivotally
mounted to the main body 10 by a hinge, and may be formed not to be
easily opened by a hook in case that the inlet 11 is closed.
[0047] In addition, a control panel 5 may be disposed on an upper
portion of the front surface on which the inlet 11 is formed, and
the control panel 5 may include an input unit 110 receiving a user
instruction for the washing, drying and refresh cycles and a
display unit 130 displaying information on operation of each cycle.
However, the disclosure is not limited thereto, and the control
panel 5 including the input unit 110 and the display unit 130 may
be disposed on a side portion or a lower portion of the front
surface or on one region of upper, left or right surface of the
main body 10.
[0048] In detail, the input unit 110 may be an input device
receiving the user instruction on an operation of the washing
machine 100, such as washing time, rinsing number of times,
dehydration time, drying time, time and operation related to the
refresh cycle, pause and the like. The input unit 110 may include a
touch input unit 111 receiving a touch instruction from a user and
an operation unit 112 receiving an operation instruction from the
user.
[0049] The display unit 130 may display amount of the laundry, the
washing and drying cycles, water temperature information, rinsing
information, dehydration intensity, washing time information,
refresh cycle progress information and the like. The display unit
130 may be implemented as a liquid crystal display (LCD) panel, a
light emitting diode (LED) panel or the like.
[0050] Meanwhile, the above-described touch input unit 111 may be
implemented as a touch pad forming a mutual layer structure along
with the display unit 130, and in this case, the touch input unit
111 and the display unit 130 may be implemented in a form of a
touch screen.
[0051] The tub 15 may be provided inside the main body 10, and may
include a tub rear member 15b formed in a shape of a cylinder
having a closed rear end and a tub front member 15a disposed in
front of the tub rear member 15b. In addition, a drive unit 30
rotating the drum 20 may be provided at a rear surface of the tub
rear member 15b.
[0052] According to an embodiment, the drive unit 30 may connect a
drive motor rotating the drum 20 and the drum 20, and may include a
drive shaft rotated by the drive motor and a bearing housing
supporting the drive shaft to be rotated. Therefore, the drum 20
may be rotated around the drive shaft rotated by the drive
motor.
[0053] According to an embodiment, the drive motor may be
implemented as a brushless direct current (BLDC) motor with easy
control of its rotational speed, an alternation current (AC) motor
or the like.
[0054] Meanwhile, a guide tube 15c may be provided on an upper
portion of the tub rear member 15b to guide the air inside a drying
unit 70, the filter unit 80, the tub 15 and the drum 20 toward the
drying unit 70. In addition, the drying unit 70 may be provided
above the opening 15d to deliver the air introduced through the
guide tube 15c into the tub 15 and the drum 20.
[0055] In addition, a temperature sensor 16 may be provided in the
tub 15 to detect a temperature inside the tub 15. In addition, the
tub 15 may be connected to the water supply unit 40 and the
additive input unit 60 through a connection tube 74 provided on an
upper portion of the tub 15, and may receive the additive diluted
in washing water. Here, the additive may be a material in which a
detergent for washing the laundry or a fabric softener for coating
the laundry with fragrant particles is diluted in the washing
water.
[0056] In addition, the tub 15 may be connected to the drainage
unit 50 through a drainage tube 51 provided at a lower portion of
the tub 15 to discharge the washing water contained in the tub 15
to the outside of the washing machine 100.
[0057] The drum 20 may be rotatably provided in the tub 15, and may
include a plurality of through holes 20a introducing the washing
water contained in the tub 15 into the drum 20, a lifter 20b
lifting the washing water introduced into the drum 20 upwards and
an opening 20c discharging the washing water introduced into the
drum 20.
[0058] The water supply unit 40 may be provided above the tub 15
and deliver the washing water supplied from a water supply source
(not shown) to the additive input unit 60 through a water supply
tube. That is, the water supply unit 40 may receive the washing
water supplied from the water supply source (not shown) through the
water supply tube by opening a water supply valve provided on one
side of the water supply tube based on a control instruction of the
control unit 120 to be described below. Here, the water supply
valve may be implemented as a solenoid valve according to an
embodiment. The washing water supplied through the water supply
unit 40 may be introduced into the additive input unit 60, and the
detergent or the fabric softener supplied to the additive supply
unit 60 may be supplied into the tub 15 through the connection tube
74 together with the washing water introduced into the additive
input unit 60.
[0059] The drainage unit 50 may be provided below the tub 15, and
pump the washing water in the tub 15 through a drainage pump and
discharge the pumped washing water to an outside of the main body
10 through a drainage hose.
[0060] The temperature adjustment unit 70 may be provided above the
tub 15 to adjust a temperature inside the drum 20 by generating hot
air and cold air to dry the laundry accommodated in the drum 20
during the drying cycle. In addition, the temperature adjustment
unit 70 may adjust the temperature inside the drum 20 by generating
the hot air and the cold air to sterilize and deodorize the laundry
accommodated in the drum 20 during the refresh cycle.
[0061] Here, the refresh cycle may be a washing process to provide
the same effect as a water washing, in which the laundry
accommodated in the drum 20 may be sterilized by the hot air and
the cold air generated inside the drum 20 through the temperature
adjustment unit 70 instead of being washed by the washing
water.
[0062] Meanwhile, the temperature adjustment unit 70 may draw the
air inside the tub 15 and the drum 20, heat the drawn air, and
discharge the heated air to the tub 15 and the drum 20.
[0063] The filter unit 80 may be provided between the temperature
adjustment unit 70 and the tub 15. The filter unit 80 may filter
out a foreign material including lint to prevent the foreign
material including the lint occurring in the laundry accommodated
in drum 20 from being drawn into the temperature adjustment unit 70
in a process in which the air inside the tub 15 and the drum 20 is
drawn into the temperature adjustment unit 70 during the drying
cycle or the refresh cycle.
[0064] The filter unit 80 may include a cleaning unit (not shown)
for removing the foreign material including the lint filtered from
the filter unit 80. Therefore, the foreign material filtered from
the filter unit 80 may be periodically removed by the cleaning unit
(not shown). It is thus possible to improve deterioration in drying
and sterilization efficiency of the laundry, which occurs in case
that the air inside the tub 15 and the drum 20 fails to be
delivered into the temperature adjustment unit 70 due to the
foreign material filtered by the filter unit 80.
[0065] FIG. 3 is an exploded perspective view of a temperature
adjustment unit according to an embodiment of the disclosure.
[0066] As shown in FIG. 3, the temperature adjustment unit 70 may
include a drying duct 71, an intake unit 72 and a heater unit
73.
[0067] The drying duct 71 may heat the air introduced from the tub
15 and the drum 20 and deliver the heated air to the tub 15. In
detail, the drying duct 71 may include an upper duct plate 71a and
a lower duct plate 71b. One end of the drying duct 71 in which the
upper duct plate 71a and the lower duct plate 71b are coupled to
each other may be connected to the tub front member 15a, and the
other end of the drying duct 71 may be connected to the tub rear
member 15b. Therefore, the drying duct 71 may deliver the air
introduced from the tub rear member 15b to the tub front member 15a
through a passage formed by the coupling of the upper duct plate
71a and the lower duct plate 71b.
[0068] The intake unit 72 may draw the air inside the tub 15 and
the drum 20 and deliver the drawn air to the drying duct 71. The
intake unit 72 may include an intake fan 72a and an intake motor
72b rotating the intake fan 72a. The intake pan 72a may be disposed
in a lower plate opening (not shown) formed in the lower duct plate
71b of the drying duct 71, and the intake motor 72b may be disposed
in an upper plate opening (not shown) formed in the upper duct
plate 71a of the drying duct 71.
[0069] In addition, the heater unit 73 may heat the air drawn from
the inside of the tub 15 and the drum 20 through the intake unit
72. The heater unit 73 may be formed in the passage formed by the
coupling of the upper duct plate 71a and the lower duct plate 71b.
Therefore, the heater unit 73 may heat the air introduced from the
inside of the tub 15 and the drum 20 into the drying duct 71
through the intake unit 72, and the drying duct 71 may deliver the
air heated through the heater unit 73 to the tub front member
15a.
[0070] In addition, a temperature sensor (not shown) may be
provided in the passage formed by the coupling of the upper duct
plate 71a and the lower duct plate 71b. In detail, the temperature
sensor (not shown) may be disposed in a direction connected to the
tub front member 15a. Accordingly, the temperature sensor (not
shown) may measure a temperature of the air heated through the
heater unit 73.
[0071] As such, in case that the air, which is drawn from the
inside of the tub 15 and the drum 20 through the intake unit 72, is
introduced into the drying duct 71, the drying duct 71 may heat the
air through the heater unit 73 and deliver the heated air into the
tub 15 and the drum 20. Therefore, during the drying cycle or the
refresh cycle, the air inside the tub 15 and the drum 20 may be
maintained at an appropriate temperature.
[0072] As above, the description schematically describes each
component of the washing machine 100 according to the disclosure.
Hereinafter, the description specifically focuses on each component
of the washing machine 100 performing the refresh cycle of the
laundry according to the disclosure.
[0073] FIG. 4 is a block diagram showing the washing machine
performing a refresh cycle according to an embodiment of the
disclosure.
[0074] As described above, the washing machine 100 is a washing
device capable of performing the washing cycle, the drying cycle
and the refresh cycle, and may be, for example, a drum washing
machine. In case of performing the refresh cycle, the washing
machine 100 may not only sterilize the laundry accommodated in the
drum 20, but also coat the laundry with the fragrant particles by
the additive such as the fabric softener.
[0075] To this end, the washing machine 100 may include the drum
20, the drive unit 30, the temperature adjustment unit 70 and the
additive input unit 60, as shown in FIG. 4.
[0076] As described above, the drum 20 may accommodate the laundry,
and the drive unit 30 may rotate the drum 20 accommodating the
laundry. In detail, the drive unit 30 may drive the drive motor to
rotate the drum 20 accommodating the laundry. In addition, the
drive unit 30 may drive the water supply unit 40 to supply the
washing water into the tub 15 or may drive the drainage unit 50 to
discharge the washing water contained in the tub 15 to the outside
of the washing machine 100.
[0077] The temperature adjustment unit 70 may adjust the
temperature inside the drum 20 by generating the hot air and the
cold air. Accordingly, the laundry accommodated in the drum 20 may
be sterilized by the hot air and the cold air generated by the
temperature adjustment unit 70.
[0078] The additive input unit 60 may put the additive into the
drum 20 to coat the laundry with the fragrant particles. In detail,
in case of receiving a material such as the fabric softener by the
user, the additive input unit 60 may dilute the material in the
washing water and put the additive obtained by diluting the
material in the washing water into the drum 20.
[0079] The control unit 120 may control the overall operation of
the each component of the washing machine 100. In particular, in
case of receiving an instruction on the refresh cycle from the
user, the control unit 120 may perform a first refresh cycle in
which the temperature adjustment unit 70 is controlled to set the
temperature inside the drum 20 to a first threshold temperature.
Here, the control unit 120 may control the temperature adjustment
unit 70 to maintain the temperature inside the drum 20 at the first
threshold temperature for a first threshold time. Accordingly, the
temperature adjustment unit 70 may generate the hot air until the
temperature inside the drum 20 is set to the first threshold
temperature. In case that the temperature inside the drum 20 is set
to the first threshold temperature, the temperature adjustment unit
70 may adjust the temperature inside the drum 20 to be maintained
at the first threshold temperature for the first threshold time
from a time point at which the temperature inside the drum 20 is
set to the first threshold temperature.
[0080] According to an embodiment, the first threshold temperature
may be an appropriate temperature advantageous for sterilizing and
deodorizing the laundry accommodated in the drum 20 and for coating
the laundry with the fragrant particles by the additive put into
the drum 20, and may be, for example, 65.degree. C. to 70.degree.
C.
[0081] In addition, the first threshold time may be half of a total
time to perform the refresh cycle. For example, in case that the
total time to perform the refresh cycle is 29 minutes, the first
threshold time may be about 14 to 15 minutes.
[0082] As such, in case that the predetermined first threshold time
passes after the temperature inside the drum 20 is set to the first
threshold temperature, the control unit 120 may control the
additive input unit 60 to put the additive into the drum 20.
Accordingly, the additive input unit 60 may dilute the material
such as the fabric softener contained at the additive input unit 60
in the washing water and put the diluted material into the drum
20.
[0083] Then, after all the additive is put into the drum 20, the
control unit 120 may perform a second refresh cycle in which the
temperature adjustment unit 70 is controlled to set the temperature
inside the drum 20 to a second threshold temperature which is lower
than the first threshold temperature. Here, the control unit 120
may control the temperature adjustment unit 70 to maintain the
temperature inside the drum 20 at the second threshold temperature
for a second threshold time.
[0084] Accordingly, the temperature adjustment unit 70 may generate
the hot air to set the temperature inside the drum 20 to the second
threshold temperature. In case that the temperature inside the drum
20 is set to the second threshold temperature, the temperature
adjustment unit 70 may adjust the temperature inside the drum 20 to
be maintained at the second threshold temperature for the second
threshold time.
[0085] According to an embodiment, the second threshold temperature
may be an appropriate temperature advantageous for preventing the
fragrant particles of the additive coated on the laundry from
disappearing from the laundry during the sterilization of the
laundry put into the drum 20, and may be, for example, 55.degree.
C. to 60.degree. C.
[0086] The second threshold time may be less than the first
threshold time described above, and may be, for example, about 2 to
3 minutes.
[0087] Meanwhile, the control unit 120 may rotate the drum 20 at a
first threshold speed while the temperature inside the drum 20 is
set to the first threshold temperature or the second threshold
temperature. In detail, the control unit 120 may control the drive
unit 30 to rotate the drum 20 at the first threshold speed during a
period of the first refresh cycle in which the temperature inside
the drum 20 is set and maintained at the first threshold
temperature or during a period of the second refresh cycle in which
the temperature inside the drum 20 is set and maintained at the
second threshold temperature. According to an embodiment, the first
threshold speed may be 40 rpm. Accordingly, the drive unit 30 may
rotate the drum 20 at the speed of 40 rpm.
[0088] Therefore, the drum 20 accommodating the laundry may be
rotated at the speed of 40 rpm by the drive unit 30 during the
periods of the first and second refresh cycles.
[0089] According to an additional aspect of the disclosure, the
control unit 120 may rotate the drum 20 in predetermined time unit
during the period of the second refresh cycle. That is, the control
unit 120 may control the drive unit 30 to rotate the drum 20 in
time unit during the period of the second refresh cycle. For
example, the control unit 120 may control the drive unit 30 to
rotate and stop the drum 20 in a unit of 5 seconds during the
period of the second refresh cycle. Accordingly, the drive unit 30
may rotate the drum 20 at the speed of 40 rpm at an interval of 5
seconds during the period of the second refresh cycle.
[0090] Meanwhile, the control unit 120 may rotate the drum 20 at a
second threshold speed which is faster than the first threshold
speed before the additive is put into the drum 20, and control the
additive input unit 60 to put the additive into the drum 20 in case
that a rotational speed of the drum 20 reaches the second threshold
speed.
[0091] That is, as described above, the control unit 120 may
control the drive unit 30 to rotate the drum 20 at the second
threshold speed after the first refresh cycle is ended. Here, the
second threshold speed may be 400 rpm. Accordingly, the drive unit
30 may rotate the drum 20 at the speed of 400 rpm.
[0092] As such, in case that the rotational speed of the drum 20
reaches the second threshold speed by the drive unit 30, the
control unit 120 may control the additive input unit 60 to put the
additive into the drum 20. Accordingly, the additive input unit 60
may put the additive into the drum 20. Meanwhile, the drive unit 30
may rotate the drum 20 at the second threshold speed while all the
additive is put into the drum 20 through the additive input unit
60. As such, as the drum 20 is rotated at the second threshold
speed while the additive is put thereinto, the laundry accommodated
in the drum 20 may be coated with the fragrant particles by the
additive without being wetted by the additive.
[0093] Meanwhile, according to an additional aspect of the
disclosure, the control unit 120 may determine whether to put the
additive into the drum 20 through the following embodiments.
[0094] According to an embodiment, the control unit 120 may
determine whether to put the additive into the drum 20 based on a
vibration state of the drum 20 accommodating the laundry.
[0095] In detail, the control unit 120 may periodically obtain
vibration intensity of the drum 20 while the drum 20 is rotated
based on detection information detected by the detection unit 170
to be described below. Therefore, the control unit 120 may compare
predetermined threshold intensity with the vibration intensity
obtained based on the detection information detected by the
detection unit 170 from a time point at which the drive unit 30 is
controlled to rotate the drum 20 at the second threshold speed
after the first refresh cycle is ended.
[0096] That is, the control unit 120 may compare the predetermined
threshold intensity with the vibration intensity obtained based on
the detection information detected by the detection unit 170 until
the rotational speed of the drum 20 reaches the second threshold
speed. As a result of the comparison, if the vibration intensity is
equal to or greater than the predetermined threshold intensity, the
control unit 120 may end the rotation of the drum 20 and then
rotate the drum 20 again at the second threshold speed. That is, in
case that the drum 20 has the vibration intensity equal to or
greater than the threshold intensity before the rotational speed of
the drum 20 reaches the second threshold speed, the control unit
120 may control the drive unit 30 to end the rotation of the drum
20 and then rotate the drum 20 again at the second threshold speed.
Accordingly, the drive unit 30 may stop the rotation of the drum 20
and then rotate the drum 20 again.
[0097] Then, in case that the predetermined threshold intensity is
compared with the vibration intensity of the drum 20 rotated again,
if the vibration intensity is less than the predetermined threshold
intensity until the rotational speed of the drum 20 reaches the
second threshold speed, the control unit 120 may control the
additive input unit 60 to put the additive into the drum 20.
Accordingly, the additive input unit 60 may put the additive into
the drum 20 while the drum 20 is rotated at the second threshold
speed.
[0098] Meanwhile, in case that the predetermined threshold
intensity is compared with the vibration intensity of the drum 20
rotated again, if the vibration intensity is equal to or greater
than the predetermined threshold intensity until the rotational
speed of the drum 20 reaches the second threshold speed, the
control unit 120 may control the drive unit 30 to end the rotation
of the drum 20 and then rotate the drum 20 again at the second
threshold speed.
[0099] Meanwhile, in case that the vibration intensity detected by
the detection unit 170 is equal to or greater than the
predetermined threshold intensity after the drum 20 is rotated
again for a predetermined threshold number of times, the control
unit 120 may control the additive input unit 60 not to put the
additive into the drum 20.
[0100] That is, after the drum 20 is rotated again for the
predetermined threshold number of times, if the vibration intensity
detected by the detection unit 170 is equal to or greater than the
predetermined threshold intensity, the control unit 120 may control
the temperature adjustment unit 70 to proceed with the second
refresh cycle after the first refresh cycle. Accordingly, the
laundry accommodated in the drum 20 may only be sterilized and
deodorized without being coated with the fragrant particles by the
additive.
[0101] According to another embodiment, the control unit 120 may
determine whether to put the additive into the drum 20 based on
whether the rotational speed of the drum 20 reaches the second
threshold speed within a predetermined threshold time after the
first refresh cycle is ended.
[0102] In detail, the control unit 120 may determine whether the
rotational speed of the drum 20 is the second threshold speed for
the predetermined threshold time from the time point at which the
drive unit 30 is controlled to rotate the drum 20 at the second
threshold speed after the first refresh cycle is ended. As a result
of the determination, in case that the rotational speed of the drum
20 reaches the second rotational speed within the second threshold
time, the control unit 120 may control the additive input unit 60
to put the additive into the drum 20. Accordingly, the additive
input unit 60 may put the additive into the drum 20 while the drum
20 is rotated at the second threshold speed.
[0103] Meanwhile, in case that the rotational speed of the drum 20
does not reach the second threshold speed within the predetermined
threshold time, the control unit 120 may control the additive input
unit 60 not to put the additive into the drum 20.
[0104] That is, in case that the rotational speed of the drum 20
does not reach the second threshold speed within the predetermined
threshold time, the control unit 120 may control the temperature
adjustment unit 70 to proceed with the second refresh cycle after
the first refresh cycle. Accordingly, the laundry accommodated in
the drum 20 may only be sterilized and deodorized without being
coated with the fragrant particles by the additive.
[0105] According to an additional aspect of the disclosure, the
control unit 120 may perform a third refresh cycle in which the
temperature adjustment unit 70 is controlled to set the temperature
inside the drum 20 to a third threshold temperature which is lower
than the above-described second threshold temperature after the
second refresh cycle is ended.
[0106] In detail, the control unit 120 may control the temperature
adjustment unit 70 to set the temperature inside the drum 20 to the
third threshold temperature which is lower than the second
threshold temperature after the second threshold time at which the
second refresh cycle is performed. Accordingly, the temperature
adjustment unit 70 may generate the hot air until the temperature
inside the drum 20 is set to the third threshold temperature.
[0107] Meanwhile, in case that the temperature inside the drum 20
is set to the third threshold temperature by the temperature
adjustment unit 70, the control unit 120 may control the
temperature adjustment unit 70 to maintain the temperature inside
the drum 20 at the third threshold temperature for a predetermined
third threshold time. Accordingly, as the temperature inside the
drum 20 is set to be maintained at the third threshold temperature,
the temperature adjustment unit 70 may adjust the temperature
inside the drum 20 to maintain the temperature inside the drum 20
at the third threshold temperature for the predetermined third
threshold time.
[0108] According to an embodiment, the predetermined third
threshold temperature may be lower than the above-described first
and second threshold temperatures, and may be, for example,
55.degree. C., and the predetermined third threshold time may be
the same time as the above-described second threshold time.
[0109] Meanwhile, the control unit 120 may control the drive unit
30 to rotate the drum 20 at the first threshold speed while the
temperature inside the drum 20 is set and maintained at the third
threshold temperature. According to an embodiment, the first
threshold speed may be 40 rpm. Accordingly, the drive unit 30 may
rotate the drum 20 at the speed of 40 rpm, as described above.
[0110] Meanwhile, according to an additional aspect of the
disclosure, the control unit 120 may control the drainage unit 50
to discharge the additive contained in the drum 20 to the outside
before the temperature inside the drum 20 is set to the third
threshold temperature. That is, the control unit 120 may control
the drainage unit 50 to discharge the additive contained in the
drum 20 to the outside in case that the second refresh cycle is
ended. Based on this control instruction, the drainage unit 50 may
discharge the additive contained in the drum 20 to the outside.
[0111] FIG. 5 is a detailed block diagram of the washing machine
according to an embodiment of the disclosure.
[0112] As shown in FIG. 5, the washing machine 100 may further
include the input unit 110, the display unit 130, a storage unit
140, an audio output unit 150, a communication unit 160 and the
detection unit 170 in addition to the above-described
components.
[0113] The input unit 110 and the display unit 130 are described in
detail above, and detailed descriptions thereof are thus omitted
hereinafter.
[0114] The storage unit 140 may store control information and an
operation program for executing operations of the washing, drying
and refresh cycles of the washing machine 100. Here, as described
above, the control information may include driving information for
rotating the drum 20 for each cycle, information for setting the
temperature inside the drum 20 and the like. In addition, the
operation program may be a program which is read from the storage
unit 140, compiled and operated to operate each component of the
washing machine 100 in case that the washing machine 100 is turned
on. The storage unit 140 may be implemented as at least one of: a
memory card (e.g. secure digital (SD) card or memory stick)
attachable to/detachable from a read-only memory (ROM), a random
access memory (RAM) or the washing machine 100; a nonvolatile
memory; a volatile memory; a hard disk drive (HDD); or a solid
state drive (SSD).
[0115] The audio output unit 150 may output each operation state of
the washing, drying and the refresh cycles of the washing machine
100 in a form of an audible sound of a speaker (not shown).
[0116] The communication unit 160 may perform wireless
communication with at least one user terminal device (not shown).
According to an embodiment, the communication unit 160 may perform
data communication with the user terminal device (not shown)
through a local area communication module, such as a bluetooth
module, a near field communication (NFC) module, a wi-fi module or
a zigbee module, to transfer information on the states of the
washing cycle, the drying cycle and the refresh cycle to the user
terminal device (not shown) or receive an instruction to control
each of the cycles from the user terminal device (not shown).
[0117] In addition, the communication unit 160 may be connected to
an external network according to a wireless communication protocol
such as Institute of electrical and electronics engineers (IEEE) to
perform the communication, such as a wireless LAN module.
[0118] The detection unit 170 may detect the operation states of
the washing, drying and refresh cycles of the washing machine 100.
According to an embodiment, the detection unit 170 may include a
sensor detecting the vibration intensity based on the rotation of
the drum 20 accommodating the laundry during the refresh cycle. In
addition, the detection unit 170 may further include the
temperature sensor detecting temperatures of the air inside the tub
15 and the drum 20 or a temperature of the air heated by the drying
unit 70, a sensor measuring a weight of the drum 20 accommodating
the laundry and the like.
[0119] FIG. 6 is an exemplary view showing processes of the washing
machine performing the refresh cycle according to an embodiment of
the disclosure.
[0120] As shown in FIG. 6, in case that a refresh cycle instruction
is input while the laundry is accommodated in the drum 20, the
washing machine 100 may perform a first refresh process (first
direction process, 610) generating the hot air to maintain the
temperature inside the drum 20 at the first threshold temperature
for the first threshold time. Here, the first threshold time may be
about half of the total time to perform the refresh cycle, and the
first threshold temperature may be 65.degree. C. to 70.degree.
C.
[0121] Through the first refresh process 610, the washing machine
100 may sterilize the laundry accommodated in the drum 20 to
deodorize a smell permeating the laundry. In addition, through the
first refresh process 610, the washing machine 100 may allow the
fragrant particles of the additive put into the drum 20 to be
diffused in the drum 20 in a process to be described below.
[0122] After the first refresh process 610, the washing machine 100
may perform a water supply process 620 for putting the additive to
coat the fragrant particles on the laundry accommodated in the drum
20. That is, in the water supply process 620, the washing machine
100 may put into the drum 20, the additive obtained by diluting the
material such as the fabric softener in the washing water.
[0123] After the water supply process 620, the washing machine 100
may perform a second refresh process (second direction process,
630) generating the hot air to maintain the temperature inside the
drum 20 at the second threshold temperature for the second
threshold time. Here, the second threshold time may be less than
the above-described first refresh process time, and the second
threshold temperature may be 55.degree. C. to 60.degree. C.
[0124] Through the second refresh process 630, the washing machine
100 may allow the fragrant particles of the additive put into the
drum 20 to be attached to the laundry accommodated in the drum
20.
[0125] After the second refresh process 630, the washing machine
100 may perform a drainage process 640 discharging the additive
contained in the drum 20 to the outside.
[0126] After the drainage process 640, the washing machine 100 may
perform a third refresh process (third direction process, 650)
generating the cold air to lower the temperature inside the drum 20
to the third threshold temperature for the third threshold time.
Here, the third threshold time may be the same time as the time for
which the temperature inside the drum 20 is maintained at the
second threshold temperature in the above-described second refresh
process 630, and the third threshold temperature may be 55.degree.
C.
[0127] Through the third refresh process 650, the washing machine
100 may allow the fragrant particles of the additive attached to
the laundry accommodated in the drum 20 to be fixed to the
laundry.
[0128] FIG. 7 is an exemplary view showing an operation of each
component for each process of the refresh cycle performed in the
washing machine according to an embodiment of the disclosure.
[0129] As shown in FIG. 7, the washing machine 100 may circulate
the air inside the drum 20 through the temperature adjustment unit
70 to dry the laundry accommodated in the drum 20 during the
refresh cycle. That is, the washing machine 100 may dry the laundry
accommodated in the drum 20 by circulating the air inside the drum
20 through the intake unit 72 included in the temperature
adjustment unit 70 during the refresh cycle.
[0130] Meanwhile, the washing machine 100 may turn on the
temperature adjustment unit 70 during the first refresh process 610
of all the processes included in the refresh cycle. Accordingly, as
the respective components configuring the temperature adjustment
unit 70 are activated, the washing machine 100 may set and maintain
the temperature inside the drum 20 at the predetermined first
threshold temperature by the hot air generated through the
temperature adjustment unit 70. In addition, the washing machine
100 may drive the drive unit 30 to rotate the drum 20 at the speed
of 40 rpm during the first refresh process 610.
[0131] During the water supply process 620 after the first refresh
process 610, the washing machine 100 may turn off the heater unit
73 of all the components configuring the temperature adjustment
unit 70, and drive the drive unit 30 to rotate the drum 20 at the
speed of 400 rpm. As such, as the drum 20 is rotated at the speed
of 400 rpm, the laundry accommodated in the drum 20 may be
prevented from being wet by the additive put into the drum 20. In
case that the drum 20 is rotated at the speed of 400 rpm, the
washing machine 100 may put the additive into the drum 20 through
the additive input unit 60. According to an embodiment, the washing
machine 100 may put about 1.5 liters (L) of the additive into the
drum 20 through the additive input unit 60.
[0132] During the second refresh process 630 after the water supply
process 620, the washing machine 100 may turn on the temperature
adjustment unit 70. Accordingly, as the respective components
configuring the temperature adjustment unit 70 are activated, the
washing machine 100 may set and maintain the temperature inside the
drum 20 at the predetermined second threshold temperature by the
hot air generated through the temperature adjustment unit 70. In
addition, the washing machine 100 may drive the drive unit 30 to
rotate the drum 20 at the speed of 40 rpm during the second refresh
process 630.
[0133] During the drainage process 640 after the second refresh
process 630, the washing machine 100 may turn off the heater unit
73 configuring the temperature adjustment unit 70 and the drive
unit 30 rotating the drum 20, and turn on the drainage unit 50 to
discharge the additive contained in the drum 20 to the outside.
Accordingly, as the drainage unit 50 is opened, the additive
contained in the drum 20 may be discharged to the outside.
[0134] During the third refresh process 650 after the drainage
process 640, the washing machine 100 may drive the drive unit 30 to
rotate the drum 20 at the speed of 40 rpm. Here, the washing
machine 100 may turn off the drainage unit 50 as the drainage
process 640 is ended and the third refresh process 650 is started.
Here, the heater unit 73 configuring the temperature adjustment
unit 70 may also be maintained off.
[0135] FIG. 8 is an exemplary view showing that the washing machine
provides a user interface (UI) based on occurrence of an event
according to an embodiment of the disclosure.
[0136] The washing machine 100 may determine whether to put the
additive into the drum 20 through the above-described
embodiments.
[0137] As described above, in case that the water supply process
620 is started, the washing machine 100 may compare the
predetermined threshold intensity with the detected vibration
intensity of the drum 20 until the rotational speed of the drum 20
reaches the second threshold speed. As a result of the comparison,
if the vibration intensity is equal to or greater than the
predetermined threshold intensity, the washing machine 100 may end
the rotation of the drum 20 and then rotate the drum 20 again at
the second threshold speed.
[0138] Then, in case that the detected vibration intensity of the
drum 20 is equal to or greater than the predetermined threshold
intensity after the washing machine 100 rotates the drum 20 again
for the predetermined threshold number of times, the washing
machine 100 may display a user interface (UI) 810, which is read,
"Please put the laundry again" through the display unit 113.
[0139] In addition, in case that the water supply process 620 is
started, the washing machine 100 may determine whether the
rotational speed of the drum 20 reaches the second threshold speed
within the predetermined threshold time. As a result of the
determination, if the rotational speed of the drum 20 does not
reach the second threshold speed within the predetermined threshold
time, the washing machine 100 may display the UI 810, which is
read, "Please put the laundry again" through the display unit
113.
[0140] Accordingly, the user may put the laundry again into the
drum 20 according to the UI 810 displayed through the display unit
113.
[0141] In case that the water supply process 620 is performed again
after the laundry is accommodated in the drum 20 again, the washing
machine 100 may determine whether the drum 20 normally reaches the
second threshold speed through the above-described embodiment. As a
result of the determination, if the drum 20 does not reach the
second threshold speed, the washing machine 100 may end the water
supply process 620 for putting the additive into the drum 20. In
addition, the washing machine 100 may omit the second refresh
process 630 and the drainage process 640, and perform the third
refresh process 650.
[0142] As above, the description specifically focuses on each
component of the washing machine 100 performing the refresh cycle
according to the disclosure. Hereinafter, the description
specifically focuses on a method of performing the refresh cycle in
the washing machine 100 according to an embodiment of the
disclosure.
[0143] FIG. 9 is a flowchart showing a method of a washing machine
to perform a refresh cycle according to an embodiment of the
disclosure.
[0144] As shown in FIG. 9, in case that a user instruction for the
refresh cycle is input while laundry is accommodated in a drum, a
washing machine 100 may set a temperature inside the drum to a
first threshold temperature and rotate the drum at a first
threshold speed (S910).
[0145] In detail, the washing machine 100 may set the temperature
inside the drum to the first threshold temperature through a
temperature adjustment unit adjusting the temperature inside the
drum accommodating the laundry by generating hot air and cold air.
In addition, in case that the temperature inside the drum is set to
the first threshold temperature, the washing machine 100 may
maintain the temperature inside the drum at the first threshold
temperature for a predetermined first threshold time. In addition,
the washing machine 100 may rotate the drum at a first threshold
speed while the temperature inside the drum is set and maintained
at the first threshold temperature.
[0146] Here, the first threshold temperature may be an appropriate
temperature advantageous for sterilizing and deodorizing the
laundry accommodated in the drum and for coating the laundry with
fragrant particles using an additive put into the drum, and may be,
for example, 65.degree. C. to 70.degree. C.
[0147] In addition, the first threshold time may be half of a total
time to perform the refresh cycle. For example, in case that the
total time to perform the refresh cycle is 29 minutes, the first
threshold time may be about 14 to 15 minutes.
[0148] In addition, the first threshold speed may be 40 rpm.
[0149] Then, the washing machine 100 may rotate the drum at a
second threshold speed (S920), and put the additive into the drum
in case that a rotational speed of the drum reaches the second
threshold speed (S930). Here, the second threshold speed may be
faster than the first threshold speed. For example, the second
threshold speed may be 400 rpm. In addition, the additive may be a
material in which a detergent for washing the laundry or a fabric
softener for coating the laundry with the fragrant particles is
diluted in washing water.
[0150] That is, in case that the drum is rotated at the second
threshold speed, the washing machine 100 may put the additive into
the drum while the drum is rotated at the second threshold speed.
Accordingly, the laundry accommodated in the drum may be coated
with the fragrant particles by the additive without being wetted by
the additive.
[0151] In case that all the additive is put into the drum, the
washing machine 100 may set the temperature inside the drum to a
predetermined second threshold temperature, and rotate the drum at
the first threshold speed (S940). Here, the washing machine 100 may
maintain the temperature inside the drum at the predetermined
second threshold temperature for a predetermined second threshold
time.
[0152] Here, the second threshold temperature may be an appropriate
temperature advantageous for preventing the fragrant particles of
the additive coated on the laundry from disappearing from the
laundry during the sterilization of the laundry put into the drum,
and may be, for example, 55.degree. C. to 60.degree. C. In
addition, the second threshold time may be less than the first
threshold time described above, and may be, for example, about 2 to
3 minutes. In addition, the first threshold speed may be 40 rpm, as
described above.
[0153] Then, the washing machine 100 may discharge the additive
contained in the drum to the outside through the drainage unit
(S950).
[0154] Then, the washing machine 100 may set the temperature inside
the drum to a predetermined third threshold temperature, and rotate
the drum at the first threshold speed (S960). Here, in case that
the temperature inside the drum reaches the predetermined third
threshold temperature, the washing machine 100 may maintain the
temperature inside the drum at the third threshold temperature for
a predetermined third threshold time.
[0155] Here, the predetermined third threshold temperature may be
lower than the above-described first and second threshold
temperatures, and may be, for example, 55.degree. C., and the
predetermined third threshold time may be the same time as the
above-described second threshold time. In addition, the first
threshold speed may be 40 rpm, as described above.
[0156] Meanwhile, the washing machine 100 may determine whether to
put the additive into the drum through the following
embodiments.
[0157] FIG. 10 is a first flowchart showing a method of the washing
machine to determine whether to put an additive into a drum
according to an embodiment of the disclosure.
[0158] As shown in FIG. 10, in case that a water supply cycle
process is started to put the additive into the drum, the washing
machine 100 may rotate the drum at the second threshold speed.
[0159] Therefore, the washing machine 100 may periodically detect
vibration intensity of the drum until the rotational speed of the
drum reaches the second threshold speed, and compare the detected
vibration intensity with predetermined threshold intensity
(S1010).
[0160] As a result of the comparison, if the detected vibration
intensity is less than the predetermined threshold intensity while
the rotational speed of the drum reaches the second threshold
speed, the washing machine 100 may put the additive into the drum
through the above-described process S930 after the rotational speed
of the drum reaches the second threshold speed.
[0161] Meanwhile, in case that the detected vibration intensity is
equal to or greater than the predetermined threshold intensity
until the rotational speed of the drum reaches the second threshold
speed, the washing machine 100 may end the rotation of the drum and
then rotate the drum again at the second threshold speed
(S1020).
[0162] Then, the washing machine 100 may determine whether a number
of times in which the drum is rotated again at the second threshold
speed is greater than a predetermined threshold number of times
(S1030); and in case of determining that the drum has the number of
times of the rotation greater than the predetermined threshold
number of times, the washing machine 100 may not put the additive
into the drum (S1040). That is, in case of determining that the
number of times in which the drum is rotated again at the second
threshold speed is greater than the predetermined threshold number
of times, the washing machine 100 may perform none of the
above-described processes S930 and S950, and perform the
above-described process S960.
[0163] FIG. 11 is a second flowchart showing a method of the
washing machine to determine whether to put an additive into a drum
according to according to another embodiment of the disclosure.
[0164] As shown in FIG. 11, in case that the water supply cycle
process is started to put the additive into the drum, the washing
machine 100 may rotate the drum at the second threshold speed.
[0165] Therefore, the washing machine 100 may determine whether the
rotational speed of the drum reaches the second threshold speed
within a predetermined threshold time (S1110). As a result of the
determination, if the drum is rotated at the second threshold speed
within the predetermined threshold time, the washing machine 100
may perform the process S930 described above to put the additive
into the drum.
[0166] Meanwhile, as a result of the determination, if the drum is
not rotated at the second threshold speed within the predetermined
threshold time, the washing machine 100 may not put the additive
into the drum (S1120). That is, in case of determining that the
number of times in which the drum is rotated again is greater than
the predetermined threshold number of times, the washing machine
100 may perform none of the above-described processes S930 and
S950, and perform the above-described process S960.
[0167] Hereinabove, the disclosure is described with reference to
embodiments.
[0168] Although the embodiments of the disclosure are illustrated
and described hereinabove, the disclosure is not limited to the
above-mentioned specific embodiments, and may be variously modified
by those skilled in the art to which the disclosure pertains
without departing from the scope and spirit of the disclosure as
disclosed in the accompanying claims. These modifications also need
to be understood to fall within the scope of the disclosure.
* * * * *