KR20200112166A - Washer and controlling method thereof - Google Patents

Abstract

Disclosed is a washing machine that can shorten a drying time by improving the drying efficiency of the washing machine. The washing machine includes: a tub; a drum provided to rotate inside the tub; a condensation duct formed on the inner wall of the tub; a heating duct provided outside the tub; a duct heater provided inside the heating duct; a fan for circulating air in the drum, the condensation duct, and the heating duct; and a control unit that rotates the drum at a first rotational speed so that laundry accommodated in the drum can be tumbled while controlling the duct heater to heat the air circulating by the fan. The control unit can rotate the drum at a second rotational speed to separate water from the laundry accommodated in the drum while controlling the duct heater to heat the circulating air.

Description

Washing machine and its control method {WASHER AND CONTROLLING METHOD THEREOF}

The disclosed invention relates to a washing machine and a control method thereof, and relates to a washing machine capable of drying laundry.

In general, a washing machine is a device including a tub in which water is accommodated and a drum rotatably installed in the tub, and laundry can be washed by rotating a drum containing laundry in the tub. The washing machine may perform a washing process for washing laundry, a rinsing process for rinsing the washed laundry, a dewatering process for dewatering the laundry, and a drying process for drying the laundry.

In particular, the washing machine may perform a drying process using a heat drying method in which laundry is dried by heating air inside the tub and drum. In order to perform this drying process, the washing machine includes a drying duct for heating the air inside the tub and the drum.

Usually, the drying duct is located above the tub. In addition, the drying duct is connected to the front upper part of the tub and the rear upper part of the tub, inhaling humid air from the rear upper part of the tub and discharging the heated and dried air to the front upper part of the tub.

As such, since the drying duct is connected to the upper part of the tub, the air flow is mainly generated in the upper part of the tub. Therefore, the drying time of the washing machine may be increased.

In order to overcome this problem, an aspect of the disclosed invention is to provide a washing machine capable of shortening the drying time by improving the drying efficiency of the washing machine.

An aspect of the disclosed invention is to provide a washing machine capable of improving drying efficiency by rotating a drum at high speed while heating air inside a tub during a drying process.

An aspect of the disclosed invention is to provide a washing machine capable of improving drying efficiency by providing a condensing duct extending from a lower portion to an upper portion of the rear of the tub and connecting the condensing duct to the drying duct.

A washing machine according to an aspect of the disclosed disease is a tub; A drum provided to rotate within the tub; A condensation duct formed on the inner wall of the tub; A heating duct provided outside the tub; A duct heater provided inside the heating duct; A fan for circulating air in the drum, the condensation duct, and the heating duct; And a control unit rotating the drum at a first rotational speed so that laundry accommodated in the drum is tumbling while controlling the duct heater to heat the air circulated by the fan. While controlling the duct heater to heat the circulating air, the controller may rotate the drum at a second rotational speed to separate water from the laundry accommodated in the drum.

According to an aspect of the disclosed outbreak, a control method for a washing machine including a tub and a drum provided to rotate within the tub includes a heating duct provided outside the tub, a condensation duct provided inside the tub, and air circulating in the drum. During heating, rotating the drum at a first rotational speed so that the laundry contained in the drum tumbling; While heating the heating duct, the condensing duct, and the air circulating in the drum, rotating the drum at a second rotational speed to separate water from the laundry accommodated in the drum.

A washing machine according to an aspect of the disclosed disease is a tub; A drum provided to rotate within the tub; A drum motor rotating the drum; A condensation duct formed on the inner wall of the tub; A condensate conduit for supplying water to the condensation duct; A condensate valve provided on the condensate conduit to allow or block water supply to the condensate duct; A heating duct provided outside the tub; A duct heater provided inside the heating duct; A fan for circulating air in the drum, the condensation duct, and the heating duct; And a controller electrically connected to the drum motor, the condensate valve, the duct heater, and the fan. The condensation duct may include a rear groove formed inside a rear wall of the tub having a cylindrical shape, and a cover partitioning the inside of the rear groove from the inside of the tub.

According to an aspect of the disclosed invention, it is possible to provide a washing machine capable of shortening the drying time by improving the drying efficiency of the washing machine.

According to an aspect of the disclosed invention, it is possible to provide a washing machine capable of improving drying efficiency by heating the air inside the tub and rotating the drum at high speed during the drying process.

According to an aspect of the disclosed invention, it is possible to provide a washing machine capable of improving drying efficiency by providing a condensing duct extending from a lower portion to an upper portion of the rear of the tub and connecting the condensing duct to the drying duct.

1 shows the appearance of a washing machine according to an embodiment.
2 is a side cross-sectional view of a washing machine according to an embodiment.
3 is an exploded view of a drying duct included in a washing machine according to an embodiment.
4 shows a tub rear part included in a washing machine according to an embodiment.
FIG. 5 shows a cross-section AA′ shown in FIG. 4.
6 is a cross-sectional view of BB′ shown in FIG. 4.
7 shows a cross-section CC' shown in FIG. 4.
8 is a view showing the rear outside of the tub included in the washing machine according to an embodiment.
9 shows a cross-section DD′ shown in FIG. 8.
10 shows the flow of water and air in the condensing duct according to an embodiment.
11 shows the flow of water and air in the condensation duct according to another embodiment.
12 shows a configuration of a washing machine according to an embodiment.
13 shows an operation of a washing machine according to an embodiment.
14 illustrates a drying process performed by a washing machine according to an embodiment.
FIG. 15 shows the operation of each configuration of the washing machine according to the drying process shown in FIG. 14.
16 and 17 show residual moisture due to the heating/dehydration operation shown in FIG. 14.
18 shows the drying time according to the temperature of the tub.
19 illustrates a filter cleaning operation of a washing machine according to an embodiment.
20 shows the amount of water flowing into the drum when washing the filter according to the rotational speed of the drum.
21 is a side cross-sectional view of a washing machine according to an embodiment.
22 shows a configuration of a washing machine according to an embodiment.

The same reference numerals refer to the same elements throughout the specification. This specification does not describe all elements of the embodiments, and general content or content overlapping between the embodiments in the technical field to which the present invention pertains will be omitted. The term'unit, module, member, block' used in the specification may be implemented as software or hardware, and according to embodiments, a plurality of'units, modules, members, blocks' may be implemented as one component, It is also possible for one'unit, module, member, block' to include a plurality of components.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only the case of being directly connected, but also the case of indirect connection, and the indirect connection includes connection through a wireless communication network. do.

In addition, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

Throughout the specification, when a member is said to be positioned "on" another member, this includes not only the case where a member is in contact with another member, but also the case where another member exists between the two members.

Terms such as first and second are used to distinguish one component from other components, and the component is not limited by the above-described terms.

Singular expressions include plural expressions, unless the context clearly has exceptions.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of each step, and each step may be performed differently from the specified order unless a specific order is clearly stated in the context. have.

Hereinafter, the operating principle and embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows the appearance of a washing machine according to an embodiment. 2 is a side cross-sectional view of a washing machine according to an embodiment. 3 is an exploded view of a tub and a drying duct included in a washing machine according to an embodiment.

1, 2, and 3, the washing machine 100 includes a cabinet 101, a tub 110, a drum 120, and a drum motor. It includes 130, a water supplier 140, a water drain 150, a detergent supplier 160, and a drying duct 170.

The cabinet 101 may accommodate components included in the washing machine 100. For example, the cabinet 101 is a tub 110, a drum 120, a drum motor 130, a water supply unit 140, a drain unit 150, a detergent supply unit 160, and drying The duct 200 can be accommodated.

In the front center of the cabinet 101, an input port 101a for inserting or withdrawing laundry is provided.

A door 102 for opening and closing the inlet 101a is provided in the inlet 101a. The door 102 is rotatably mounted to the cabinet 101 by a hinge. When the inlet 101a is closed, the door 102 may be locked by a locking device.

A control panel 103 including a user input unit for obtaining a user input for the washing machine 100 from a user and a display for displaying operation information of the washing machine 100 is provided on the front upper side of the cabinet 101.

The tub 110 is provided inside the cabinet 101 and may accommodate water for washing and/or rinsing.

The tub 110 includes a tub front parts 111 having an opening 111a formed in the front surface and a tub rear parts 112 having a cylindrical shape with a closed rear surface.

An opening 111a for putting laundry into the drum 120 provided in the tub 110 or withdrawing laundry from the drum 120 is provided on the front of the tub front part 111.

A diaphragm 113 is provided in the opening 111a of the tub front part 111, and the diaphragm 113 (connects the opening 111a to the inlet 101a of the cabinet 101. Diaphragm 113) ) Is provided with a discharge port 113a for discharging the air heated and dried by the drying duct 200 into the tub 110/drum 120 during the drying process.

The lower portion of the tub front part 111 is connected to a drain conduit 151 extending to the drain pump 152.

A bearing 112d and a bearing housing 112e for rotatably fixing the drum motor 130 are provided on the rear wall 112a of the tub rear part 112.

A tub heater 114 is provided under the tub rear part 112. The tub heater 114 may heat water contained in the tub 110. The tub heater 114 may be operated so that the temperature of the water contained in the tub 110 is heated to a temperature set by the user.

A suction port 112c is provided on the upper side of the tub rear part 112 to suck the air inside the tub 110/drum 120 into the drying duct 200 during the drying process, and the tub rear part 112 The side wall 112b is formed with a condensing duct 240 for guiding the air inside the tub 110/drum 120 to the suction port 112c during the drying process.

The condensation duct 240 is described in more detail below.

The drum 120 is rotatably provided inside the tub 110 and may accommodate laundry.

The drum 120 includes a drum body 121 in a cylindrical shape, a drum front part 122 provided in front of the drum body 121, and a drum rear part 123 provided at the rear of the drum body 121 do.

The inner surface of the drum body 121 has a through hole 121a connecting the inside of the drum 120 and the inside of the tub 110 and a lifter for lifting the laundry to the top of the drum 120 during rotation of the drum 120 ( 121b) is provided. The drum front part 122 is provided with an opening 122a for inserting laundry into the drum 120 or withdrawing laundry from the drum 120. The drum rear part 123 may be connected to the shaft 131 of the drum motor 130 that rotates the drum 120.

The drum motor 130 is provided outside the rear wall 112a of the tub 110 and is connected to the drum 120 through the shaft 131. The shaft 131 passes through the rear wall 112a of the tub 110 and is rotatably supported by a bearing 112d and a bearing housing 112e provided on the rear wall 112a of the tub 110.

The drum motor 130 includes a stator 132 fixed outside the rear wall 112a of the tub rear part 112 and a rotor 133 that is rotatably provided and connected to the shaft 131. The rotor 133 may rotate through magnetic interaction with the stator 132, and the rotation of the rotor 133 may be transmitted to the drum 120 through the shaft 131.

The drum motor 130 may include, for example, a Brushless Direct Current Motor (BLDC Motor) or a Permament Synchronous Motor (PMSM) for easy control of the rotational speed.

The water supply unit 140 is provided above the tub 110 and may supply water to the tub 110 / drum 120.

The water supply unit 140 includes a water supply conduit 141 for supplying water to the tub 110 by being connected to an external water supply source, and a water supply valve 142 provided on the water supply conduit 141.

The water supply conduit 141 may extend from an external water supply source to the detergent container 161 and guide water to the tub 110 through the detergent container 161.

The water supply valve 142 may allow or block water supply from an external water supply source to the tub 110 in response to an electrical signal. The water supply valve 142 may include, for example, a solenoid valve that opens and closes in response to an electrical signal.

The drain unit 150 is provided under the tub 110 and may discharge water contained in the tub 110 / drum 120 to the outside.

The drain unit 150 includes a drain conduit 151 extending from the tub 110 to the outside of the cabinet 101 and a drain pump 152 provided on the drain conduit 151. The drain pump 152 may pump water from the drain conduit 151 to the outside of the cabinet 101.

The detergent supply unit 160 is provided on the upper side of the tub 110, and may supply detergent to the tub 110 / drum 120.

The detergent supply unit 160 includes a detergent container 161 for storing detergent, and a mixing conduit 162 connecting the detergent container 161 with the tub 110.

The detergent container 161 is connected to the water supply conduit 141, and water supplied through the water supply conduit 141 may be mixed with the detergent of the detergent container 161. A mixture of detergent and water may be supplied to the tub 110 through the mixing conduit 162.

The drying duct 200 is provided on the rear wall 112a of the tub 110 and the tub 110 and may dry laundry accommodated in the drum 120.

The drying duct 200 includes a heating duct 210, a filter housing 220, a connection conduit 230, and a condensing duct 240.

The heating duct 210 is provided on the tub 110, and air sucked from the tub 110 may be heated while passing through the heating duct 210.

The heating duct 210 extends from the rear of the tub 110 to the front of the tub 110. The front side of the heating duct 210 is connected to the discharge port 111b, and the rear side of the heating duct 210 is connected to the filter housing 220.

The heating duct 210 has a tubular shape extending from the rear of the tub 110 to the front of the tub 110 and may include a duct upper plate 211 and a duct lower plate 212. However, the shape of the heating duct 210 is not limited to that shown in FIG. 3.

Inside the heating duct 210, that is, between the upper duct 211 and the lower duct 212, a fan 213, a fan motor 214, and a duct heater 215 are provided.

The fan motor 214 may be connected to the fan 213 through a rotation shaft, and may provide rotation to the fan 213.

The fan 213 may be provided in the opening 212a of the lower plate 212 of the duct, and the fan 213 may circulate air between the tub 110 and the heating duct 210 by rotation. For example, the fan 213 sucks the air inside the tub 110/drum 120 from the rear of the tub 110 into the heating duct 210, and the air in the heating duct 210 is sucked into the tub 110. Can be discharged to the front.

The duct heater 215 may heat air passing through the heating duct 210. The air of the tub 110 is sucked into the heating duct 210 by the fan 213 and may flow in the heating duct 210. The duct heater 215 may heat air flowing through the heating duct 210. The heated air may be discharged to the tub 110 by the fan 213.

The filter housing 220 is provided between the heating duct 210 and the tub 110 and may guide air sucked from the tub 110 through the connection conduit 230 to the heating duct 210.

The filter housing 220 is connected to the heating duct 210. In addition, the filter housing 220 is connected to the tub 110 through a connection conduit 230.

The filter housing 220 has a shape in which two cylinders are combined. The upper cylinder is connected to the heating duct 210, and the lower cylinder is connected to the connection conduit 230. The upper cylinder and the lower cylinder have different diameters. The central axis of the upper cylinder does not coincide with the central axis of the lower cylinder, and the central axis of the upper cylinder may be arranged parallel to the central axis of the lower cylinder. However, the shape of the filter housing 220 is not limited to that shown in FIG. 3.

A filter 221 is provided in the filter housing 220 to remove dust contained in the air sucked from the tub 110. For example, the filter 221 may be provided at a portion where the upper cylinder and the lower cylinder are connected.

In the filter housing 220, a washing water nozzle 222 for spraying water to clean the filter 221 is provided. The washing water nozzle 222 is connected to an external water supply source through a washing water conduit 223, and a washing water valve 224 is provided on the washing water conduit 223. The washing water valve 224 may allow or block water supply to the washing water nozzle 222 in response to an electrical signal. The washing water valve 224 may include, for example, a solenoid valve that opens and closes in response to an electrical signal.

The connection conduit 230 is provided between the filter housing 220 and the tub 110, and may guide air sucked from the tub 110 to the tub 110.

One end of the connection conduit 230 is connected to the condensation duct 240. Specifically, the connection conduit 230 may be connected to the suction port 112c of the tub 110. The connection conduit 230 is also connected to the filter housing 220 at its other end.

The connection conduit 230 may have a bellows shape to prevent the vibration of the tub 110 from being transmitted to the filter housing 220. However, the shape of the connection conduit 230 is not limited to that shown in FIG. 3.

Hereinafter, the condensation duct 240 will be described.

4 shows a tub rear part included in a washing machine according to an embodiment. 5 shows a cross-section A-A' shown in FIG. 4. 6 shows a cross section taken along line B-B' shown in FIG. 4. 7 shows a cross-section C-C' shown in FIG. 4. 8 is a view showing the rear outside of the tub included in the washing machine according to an embodiment. 9 shows a cross-section D-D' shown in FIG. 8.

4, 5, 6, 7, 8 and 9, the condensation duct 240 is provided inside the rear wall (112a) of the tub (110).

While the air in the tub 110 passes through the condensation duct 240, water vapor contained in the air may be condensed. Air heated from the heating duct 210 during the drying process is supplied to the inside of the tub 110 and the drum 120, and the heated air may absorb moisture from wet laundry contained in the drum 120.

When hot and humid air comes into contact with cold water, water vapor contained in the hot and humid air may condense.

A condensation duct 240 may be provided on the rear wall 112a of the tub 110 and water for condensation may be supplied to the condensation duct 240. Accordingly, the high-temperature and high-humidity air inside the drum 120 may contact water flowing along the outer wall of the condensing duct 240, and water vapor contained in the high-temperature and high-humidity air may be condensed.

4, 5, 6 and 7, the condensation duct 240 may be provided integrally with the tub rear part 112. For example, the condensation duct 240 may be provided inside the rear wall 112a of the tub rear part 112 along the side wall 112b of the tub rear part 112.

A step recessed along the side wall 112b of the tub rear part 112 may be formed in the rear wall 112a of the tub rear part 112. A part of the edge portion of the rear wall 112a of the tub rear part 112 is further retracted rearward than the central portion of the rear wall 112a of the tub 110. As a result, a rear groove 241 having a substantially horseshoe shape may be formed at the inner edge of the rear wall 112a of the tub rear part 112. For example, the rear groove 241 is formed along the side wall 112b of the rear part 112 of the tub as shown in FIG. 7, and the first central angle α of the rear groove 241 is approximately 180 degrees. It can be between 360 degrees.

As shown in FIG. 8, ribs 112f and 112g may be provided outside the rear wall 112a of the tub rear part 112 in order to improve the rigidity of the tub 110.

A first rib 112f is provided at an approximately central portion of the rear wall 112a of the tub rear part 112, and a second rib 112g is provided at an approximately edge portion of the rear wall of the tub rear part 112. The depth of the first rib 112f The depth of the second rib 112g is different from each other. Specifically, because the rear groove 241 is formed at the inner edge of the rear wall 112a of the tub rear part 112, the second provided at the approximately edge of the rear wall 112a of the tub rear part 112 The depth of the rib 112g is smaller than the depth of the first rib 112f provided at an approximately central portion of the rear wall 112a of the tub rear part 112.

As shown in FIGS. 4 and 7, a cover 242 may be provided on a rear groove 241 having a substantially horseshoe shape formed inside the rear wall 112a of the tub rear part 112.

The cover 242 has an approximately horseshoe shape to correspond to the shape of the rear groove 241. For example, the cover 242 is provided along the side wall 112b of the tub rear part 112 on the rear wall 112a of the tub rear part 112 as shown in FIG. 7, and the cover 242 2 The central angle β may be between about 180 degrees and 360 degrees.

Further, the second central angle β of the cover 242 may be smaller than the first central angle α of the rear groove 241. Accordingly, at least a part of the rear groove 241 is not covered by the cover 242, and at least a part of the rear groove 241 may be exposed to the outside.

The portion exposed to the outside due to not being covered by the cover 242 may form inlets 243a and 243b. As shown in FIG. 7, inlets 243a and 243b may be formed at both ends of the rear groove 241. For example, the first inlet 243a may be formed at the left end of the rear groove 241, and the second inlet 243b may be formed at the right end of the rear groove 241. Water or air inside the tub 110 may be introduced into the rear groove 241 through the first inlet 243a and the second inlet 243b.

The cover 242 may be spaced apart from the rear groove 241 in front of the rear groove 241. For example, the cover 242 may be provided on the same plane as the inner surface of the rear wall 112a of the tub rear part 112.

Since the cover 242 is separated from the rear groove 241, a space through which water or air can flow is formed between the cover 242 and the rear groove 241, and the cover 242 and the rear groove 241 The space between them may form a condensation duct 240.

The condensation duct 240 is formed by the rear wall 112a and the cover 242 of the tub rear part 112. The condensation duct 240 may be provided along the side wall 112b of the tub rear part 112 on the rear wall 112a of the tub rear part 112 having a cylindrical shape with one bottom closed.

The condensation duct 240 may have a substantially horseshoe shape similar to the cover 242 and the rear groove 241. A first inlet 243a and a second inlet 243b are provided at both ends of the condensation duct 240 having a substantially horseshoe shape.

The cross section of the condensation duct 240 may have a substantially rectangular shape as shown in FIGS. 5 and 6.

The width w of the condensing duct 240 and the depth d of the condensing duct 240 may be determined depending on the rigidity of the tub 110 and the amount of air passing through the condensing duct 240.

As the width w of the condensing duct 240 and the depth d of the condensing duct 240 increase, the amount of air passing through the condensing duct 240 increases, and drying efficiency of the washing machine 100 may increase. .

On the other hand, as the depth d of the condensation duct 240 increases, the depth of the second rib 112g provided outside the rear wall 112a of the tub rear part 112 decreases. In order to match with other furniture or home appliances, the total size (width, height, and height) of the washing machine 100 may be a predetermined value. Accordingly, as the depth d of the condensation duct 240 increases, the size of the second rib 112g decreases, and the rigidity of the tub 110 may decrease.

In addition, as the width w of the condensation duct 240 increases, the size of the first rib 112f provided outside the rear wall 112a of the tub rear part 112 is reduced, and the second rib 112g is The size can be increased. Since the depth of the second rib 112g is shallower than the depth of the first rib 112f, the stiffness of the tub 110 may decrease as the width w of the condensation duct 240 increases.

The width (w) and depth (d) of the condensation duct 240 affects the stiffness of the tub 110 and the amount of air passing through the condensation duct 240, and the rigidity of the tub 110 and the condensation duct 240 ) Can be determined depending on the amount of air passing through. For example, the width w of the condensation duct 240 may be determined so that the area of the condensation duct 240 is approximately 20% or more of the total area of the rear wall 112a of the tub rear part 112.

Condensation nozzles 244a and 244b for spraying water for condensing water vapor into the condensation duct 240 are provided on the side of the condensation duct 240. A first condensing nozzle 244a is provided on the left side of the condensing duct 240 and a second condensing nozzle 244b is provided on the right side of the condensing duct 240.

The first condensing nozzle 244a and the second condensing nozzle 244b are connected to an external water source through a condensate conduit (see FIG. 3 ), and a condensate valve 246 is provided on the condensate conduit 245. The condensate valve 246 may allow or block water supply to the first condensing nozzle 244a and the second condensing nozzle 244b in response to an electrical signal. The condensate valve 246 may include, for example, a solenoid valve that opens and closes in response to an electrical signal.

The condensation duct 240 may extend from the first inlet 243a and the second inlet 243b formed at both ends of the condensation duct 240 to the suction port 112c formed on the upper side of the tub 110.

In order to extend the condensation duct 240 provided inside the rear wall 112a of the tub rear part 112 to the suction port 112c, the tub rear part having a cylindrical shape is located near the suction port 112c of the tub rear part 112. Side grooves 247 in which the side walls 112b of 112 are depressed toward the outside may be formed.

The side groove 247 may be provided on the upper side of the tub 110. For example, it may be provided on the upper right side of the tub 110 as shown in FIGS. 4 and 7. It may be provided at approximately 1 o'clock to 2 o'clock direction with respect to the center of the tub 110.

The side groove 247 may have an approximately triangular column shape. Accordingly, when observed from the outside of the tub 110, the side groove 247 may be seen as a stepped protruding portion 247a. For example, as shown in FIG. 4, the side groove 247 may be formed inside the stepped protruding portion 247a formed on the sidewall of the tub rear part 112. However, the shape of the side groove 247 is not limited thereto.

The side groove 247 may extend from the rear groove 241 to the suction port 112c. For example, the side groove 247 may extend from the rear surface of the rear groove 241 to the suction port 112c.

The cover 242 may include a protruding portion to cover the side groove 247. The protruding portion of the cover 242 extends to the lower side of the suction port 112c to partition the side groove 247 from the inside of the tub 110.

As such, the condensation duct 240 is a suction port formed on the side wall 112b of the rear part 112 from the first inlet 243a and the second inlet 243b formed inside the rear wall 112a of the tub 110. 112c). The condensation duct 240 may be connected to the heating duct 210 through the suction port 112c. Air passing through the condensation duct 240 may be introduced into the heating duct 210 through the suction port 112c.

As such, the condensation duct 240 may be provided on the rear wall 112a of the tub rear part 112. Since the condensation duct 240 is provided, water vapor contained in the internal air of the tub 110 / drum 120 may be condensed while passing through the condensation duct 240. In addition, by the condensation duct 240, the time for the internal air of the tub 110/drum 120 to contact water vapor increases, thereby increasing the amount of condensed water vapor. Accordingly, the drying efficiency of the washing machine 100 is improved.

The condensation duct 240 may be integrally formed with the tub rear part 112 inside the rear wall 112a of the tub rear part 112. Accordingly, the condensation duct 240 can be provided without attaching an additional structure (eg, a conduit for forming a condensation duct) to the rear of the tub 110.

Furthermore, an increase in the size of the washing machine due to the additional structure may be prevented, and the size of the tub and drum (washing capacity) due to the additional structure may be prevented from being audited.

Since the condensation duct 240 is formed by the cover 242, the assembly structure for forming the condensation duct 240 can be simplified.

Since the condensation duct 240 is integrally formed with the tub rear part 112, leakage of water in the condensation duct 240 may be prevented.

The condensation duct 240 includes a first inlet 243a and a second inlet 243b, thereby forming two flow paths from the first inlet 243a and the second inlet 243b to the suction port 112c. do. Accordingly, resistance of the airflow passing through the condensing duct 240 may be reduced, and the amount of air passing through the condensing duct 240 may be increased.

By configuring the cover 242 forming the condensation duct 240 of a metal material, the condensation efficiency of the condensation duct 240 may be further improved.

10 shows the flow of water and air in the condensing duct according to an embodiment.

As shown in FIG. 10, a first condensing nozzle 244a and a second condensing nozzle 244b for spraying water for condensing water vapor into the condensing duct 240 are provided on the side wall of the condensing duct 240. .

Water sprayed from the first condensing nozzle 244a and the second condensing nozzle 244b may flow downward along the sidewall of the condensation duct 240. For example, water may flow along the rear wall 112a of the tub rear part 112 forming the condensation duct 240 or along the cover 242.

The internal air of the tub 110/drum 120 is sucked into the condensation duct 240 through the first inlet 243a and the second inlet 243b formed under the rear wall 112a of the tub 110 Can be.

Air sucked through the first inlet 243a and the second inlet 243b may flow along the condensation duct 240 to the suction port 112c provided on the top of the tub 110. The hot and humid air may contact water flowing along the sidewall of the condensation duct 240 while flowing along the condensation duct 240. While the hot and humid air is in contact with the water of the condensing duct 240, water vapor contained in the hot and humid air may be condensed.

11 shows the flow of water and air in the condensation duct according to another embodiment.

In order to improve the condensation efficiency of water vapor contained in air, a portion of the condensation duct 240 with a reduced cross-sectional area of the inner flow path may be formed.

For example, in order to reduce the cross-sectional area of the inner flow path of the condensation duct 240, projections 248a and 248b are formed on the inner wall of the condensation duct 240 as shown in FIG. 11. Further, condensing nozzles 244a and 244b for spraying water are provided on the protrusions 248a and 248b. A first protrusion 248a and a second protrusion 248b are formed in the condensation duct 240, a first condensation nozzle 244a is provided in the first protrusion 248a, and a second condensation is formed in the second protrusion 248b. A nozzle 244b is provided.

The air flowing through the condensation duct 240 increases the flow velocity in a portion where the cross-sectional area is reduced by the first protrusion 248a and the second protrusion 248b. In addition, the air may contact water sprayed from the first condensing nozzle 244a and the second condensing nozzle 244b provided in the first protrusion 248a and the second protrusion 248b, respectively. For example, water is injected into the rapidly flowing air through the first condensing nozzle 244a provided in the first protrusion 248a.

As a result, the contact between water and air increases, and the amount of water vapor contained in the air condensed by water may increase. In other words, condensation efficiency in the condensation duct 240 may be improved, and a drying time may be reduced.

With reference to Figs. 1 to 11, the flow of air during the drying process is described.

The air inside the tub 110 / drum 120 may be condensed and heated while passing through the condensing duct 240 and the heating duct 210.

Even after dehydration, the laundry still contains a lot of moisture, and the amount of water vapor contained in the air inside the drum 120 may increase due to the wet laundry.

Air inside the drum 120 may be sucked into the condensing duct 240 by the operation of the fan 213. For example, humid air inside the drum 120 may pass through the through hole 121a of the drum 120 and move to the space between the drum 120 and the tub 110. While passing through the through hole 121a of the drum 120, the air inside the drum 120 passes through the wet laundry, whereby the amount of water vapor contained in the air may further increase.

The air passing through the through hole 121a may be sucked into the condensation duct 240 through the first inlet 243a and/or the second inlet 243b provided in the rear wall 112a of the tub 110. Water sprayed from the first condensing nozzle 244a and the second condensing nozzle 244b may flow on the side wall of the condensing duct 240.

The air introduced into the condensation duct 240 passes through the condensation duct 240 and is sucked into the heating duct 210. While the humid air passes through the condensation duct 240, it may contact water flowing through the sidewall of the condensation duct 240, and may be condensed while contacting cold water contained in the humid air. Accordingly, the amount of water vapor contained in the air may be reduced while passing through the condensation duct 240.

Air that has lost water vapor in the condensing duct 240 is sucked into the heating duct 210 through the suction port 112c by the fan 213. Air passes through the filter housing 220, and particles such as dust contained in the air may be caught while passing through the filter housing 220. The air passes through the fan 213 and may be discharged to the heating duct 210 by the fan 213.

Air may be heated by the duct heater 215 while passing through the heating duct 210. As the air is heated, the capacity of the air to accommodate water vapor (amount of saturated water vapor) may increase. In other words, the amount of saturated water vapor in the air can increase.

Air heated in the heating duct 210 may be discharged into the drum 120 through the discharge port 111b.

Inside the drum 120, air may absorb water vapor from wet laundry and circulate through the condensing duct 240 and the heating duct 210.

As such, the washing machine 100 can dry laundry through absorption of water vapor in the drum 120, condensation of water vapor in the condensation duct 240, and heating of air in the heating duct 210. have.

Hereinafter, a control configuration and a control operation of the washing machine 100 for drying laundry will be described.

12 shows a configuration of a washing machine according to an embodiment. 13 shows an operation of a washing machine according to an embodiment.

12 and 13, the washing machine 100 includes a user input unit 171, a display 172, a water level sensor 173, a tub temperature sensor 174, a duct temperature sensor 175, and a motor driving circuit 180. ), drum motor 130, water supply valve 142, drain pump 152, fan motor 214, tub heater 114, duct heater 215, washing water valve 224, condensate valve 246, and It includes a control unit 190. In addition, the washing machine 100 may detect the amount of laundry 1010, a washing process 1020, a rinsing process 1030, a dewatering process 1040, and a drying process 1050.

The drum motor 130, the water supply valve 142, the drain pump 152, the fan motor 214, the tub heater 114, the duct heater 215, the washing water valve 224 and the condensate valve 246 are shown in FIG. 3. It may be the same as described in conjunction with.

The user input unit 171 is provided on the control panel 103 of the cabinet 101, and the dial 171a (refer to Fig. 1) capable of obtaining a user input by rotation and a user input can be obtained by reciprocating movement. It includes an input button 171b.

The user can select any one of a plurality of washing courses by rotating the dial 171a. The washing machine 100 may include a plurality of different washing courses for washing different types of laundry, for example. Different washing courses may include different washing times, different rinsing times, and different spinning times.

The input button 171b is a washing button for adjusting the washing time for washing the laundry by the washing machine 100, a rinse button for adjusting the number of rinsing times for the washing machine 100 to rinse the laundry, and the washing machine 100 to dehydrate the laundry. It may include a spin button to control the spin time. In addition, the button 171b may include a power button for allowing or blocking power supplied from an external power source, and an operation button for starting or stopping the operation of the washing machine 100.

The dial 171a and the button 171b may transmit an electrical signal (voltage or current) corresponding to the user input to the controller 190 in response to a user input received from the user.

The display 172 is provided on the control panel 103 of the cabinet 101 and may display an operating state of the washing machine 100 and a user's control command. For example, the display 172 may display the washing course selected by the user, and may display the time remaining until the completion of the operation while the washing machine 100 is operating.

The display 172 may include a Light Emitting Diode (LED) panel, an Organic Light Emitting Diode (OLED) panel, a Liquid Crystal Display (LCD) panel, or the like.

The display 172 may employ a touch screen panel (TSP) that receives a control command from a user and displays operation information corresponding to the received control command.

In this way, the display 172 may receive a display control signal from the controller 170 and display an image corresponding to the display control signal.

The water level sensor 173 may be installed at the end of the connection hose 173a (see FIG. 2) connected to the lower portion of the tub 110.

The water level of the connection hose (173a) may be the same as the water level of the tub (110). As the water level of the connection hose 173a increases, the pressure inside the connection hose 173a increases, and the pressure inside the connection hose 173a decreases due to the decrease in the water level of the connection hose 173a.

The water level sensor 173 may measure the pressure inside the connection hose 173a, and may output an electrical signal corresponding to the measured pressure to the control unit 190. The control unit 190 may identify the water level of the connection hose 173a, that is, the water level of the tub 110 based on the pressure of the connection hose 173a measured by the water level sensor 173.

The tub temperature sensor 174 may be provided under the tub 110. For example, the tub temperature sensor 174 may be installed near the tub heater 114.

The tub temperature sensor 174 may measure the temperature of water contained in the tub 110 or the temperature of the air inside the tub 110 / drum 120. For example, the tub temperature sensor 174 may measure the temperature of water accommodated in the tub 110 during a washing and/or rinsing process. In addition, the tub temperature sensor 174 may measure the temperature of the air inside the tub 110 / drum 120 during the drying process.

The tub temperature sensor 174 may include a thermistor. The electrical resistance value of the thermistor is converted according to temperature, and the tub temperature sensor 174 may transmit an electrical signal (voltage or current) corresponding to the electrical resistance value of the thermistor to the control unit 190.

The duct temperature sensor 175 may be provided inside the heating duct 210. For example, the duct temperature sensor 175 may be installed near the duct heater 215. Specifically, the duct temperature sensor 175 may be located downstream of the duct heater 215 based on the flow of air during the heating stroke.

The duct temperature sensor 175 may measure the internal temperature of the heating duct 210. For example, the duct temperature sensor 175 may measure the temperature of air heated by the duct heater 215 during the drying process.

The duct temperature sensor 175 may include a thermistor. The electrical resistance value of the thermistor is converted according to the temperature, and the duct temperature sensor 175 may transmit an electrical signal (voltage or current) corresponding to the electrical resistance value of the thermistor to the control unit 190.

The motor driving circuit 180 may be mounted on a printed circuit board installed near the drum motor 130.

The motor driving circuit 180 may supply a driving current to the drum motor 130. The motor driving circuit 180 may convert AC power of an external power source into driving power for driving the drum motor 130.

The motor driving circuit 180 may have various topologies according to the type of the drum motor 130.

For example, when the drum motor 130 is a DC motor, the motor driving circuit 180 may convert AC power supplied from an external power source into DC power and intermittently supply DC power to the drum motor 130. When the drum motor 130 is a non-commutator DC motor, the motor driving circuit 180 converts AC power to DC power, then converts the DC power back to square wave AC power, and converts square wave AC power to drum It can be supplied to the motor 130. When the drum motor 130 is a permanent magnet synchronous motor, the motor driving circuit 180 converts AC power into DC power, then converts the DC power back to AC power in the form of a sine wave, and converts AC power in the form of a sine wave into the drum. It can be supplied to the motor 130. When the drum motor 130 is an induction motor, the motor driving circuit 180 may intermittently supply AC power supplied from an external power source to the drum motor 130.

In addition, the motor driving circuit 180 detects the first driving current supplied to the drum motor 130 in order to prevent damage to the drum motor 130 due to overload, and information on the first driving current (for example, , Driving current value) may be output to the controller 190.

The control unit 190 may be mounted on, for example, a printed circuit board provided on the rear surface of the control panel 103.

The control unit 190 includes a user input unit 171, a tub temperature sensor 174, a duct temperature sensor 175, a display 172, a motor driving circuit 180, a water supply valve 142, a drain pump 152, and a fan. It is electrically connected to the motor 214, the tub heater 114, the duct heater 215, the washing water valve 224, and the condensate water valve 246.

The control unit 190, based on the output of the user input unit 171, the tub temperature sensor 174, and the duct temperature sensor 175, the display 172, the motor driving circuit 180, the water supply valve 142 and drainage The pump 152, the fan motor 214, the tub heater 114, the duct heater 215, the washing water valve 224, and the condensate water valve 246 may be controlled.

The controller 190 stores or stores a processor 191 that generates a control signal for controlling the operation of the washing machine 100, and a program and data for generating a control signal for controlling the operation of the washing machine 100. It includes a memory 192. The processor 191 and the memory 192 may be implemented as separate chips, or may be implemented as a single chip. In addition, the control unit 190 may include a plurality of processors or a plurality of memories.

The processor 191 may process data and/or signals according to a program provided from the memory 192 and provide a control signal to each component of the washing machine 100 based on the processing result.

The processor 191 receives an electrical signal related to a user input from the user input unit 171, receives an electrical signal related to the temperature of the tub 110 from the tub temperature sensor 174, and heats from the duct temperature sensor 175 Electrical signals related to the temperature of the duct 210 may be received. The processor 191 may process an electric signal related to a user input, an electric signal related to the temperature of the tub 110 and an electric signal related to the temperature of the heating duct 210.

The processor 191 provides an image signal to the display 172 and a driving signal to the motor driving circuit 180 based on the user input, the temperature of the tub 110 and the temperature of the heating duct 210 Provides a water supply signal to the valve 142, a drainage signal to the drain pump 152, a blow signal to the fan motor 214, a tub heating signal to the tub heater 114, and a duct heater 215. A duct heating signal may be provided and a filter cleaning signal may be provided to the wash water valve 224 and a condensation signal may be provided to the condensate water valve 246.

For example, the processor 191 may identify the laundry course selected by the user based on the user input. The processor 191 determines the rotation speed and operation period (eg, on time and off time) of the drum 120 depending on the washing course selected by the user, and determines the drum motor according to the determined rotation speed and operation period. A motor signal for rotating 130 may be provided to the motor driving circuit 180.

The processor 191 provides the fan motor 214 with a blowing signal for inhaling the air inside the tub 110 / drum 120 into the drying duct 200 during the drying process, and the air in the heating duct 210 Provides a duct heating signal for heating the duct heater 215, a condensation signal for spraying water to the condensation duct 240 is provided to the condensate valve 246, and a driving signal for rotating the drum 120 It may be provided to the driving circuit 180.

The processor 191 may include an operation circuit, a memory circuit, and a control circuit. The processor 191 may include one chip or may include a plurality of chips. Also, the processor 191 may include one core or may include a plurality of cores.

The memory 192 may store or store programs and data for controlling the operation of the washing machine 100 according to a washing course. For example, the memory 192 may store or store a rotation speed of the drum 120 according to a washing course and a washing time/rinsing number/spinning time according to the washing course.

The memory 192 stores user input received through the dial 171a and the input button 171b, or information on the operation of the washing machine 100 (for example, the current stroke, the remaining time until the washing machine is completed). ) Can be remembered.

The memory 192 includes volatile memories such as S-RAM (Static Random Access Memory, S-RAM) and D-RAM (Dynamic Random Access Memory, D-RAM), Read Only Memory (ROM), and EPROM ( Nonvolatile memory such as Erasable Programmable Read Only Memory (EPROM) may be included.

The memory 192 may include one memory device or may include a plurality of memory devices.

As illustrated in FIG. 13, the controller 190 may control each component of the washing machine 100 to wash/rinse/dehydrate/dry laundry. The controller 190 may measure the amount of laundry (1010), and sequentially perform a washing process 1020, a rinsing process 1030, a spin-drying process 1040, and a drying process 1050.

The control unit 190 measures the amount of laundry (1010).

Due to the increase in the amount of laundry, the current supplied from the motor driving circuit 180 to the drum motor 130 may increase. The controller 190 controls the motor driving circuit 180 to rotate the drum 120 in the forward or reverse direction to measure the amount of laundry, and the current supplied from the motor driving circuit 180 to the drum motor 130 Can be measured.

The controller 190 may estimate the amount of laundry based on the current supplied from the motor driving circuit 180 to the drum motor 130.

The controller 190 performs a washing process 1020.

The controller 190 may supply water and detergent to the tub 110. The control unit 190 may open the water supply valve 142 to supply water to the tub 110 depending on the measured amount of laundry. By opening the water supply valve 151, water may be supplied to the tub 110 via the detergent container 161. Accordingly, the detergent may be supplied to the tub 110 together with water during the first water supply for washing.

The controller 190 may rotate the drum 120 at a low speed for washing. The controller 190 may control the motor driving circuit 180 to rotate the drum 120 at a low speed (eg, a rotational speed between about 45 rpm and 60 rpm). The controller 190 may control the motor driving circuit 180 so that the drum 120 alternately repeats rotation in the first direction and rotation in the second direction. While the drum 120 rotates alternately in the first direction and the second direction, laundry inside the drum 120 may roll along the inner wall of the drum 120 or fall after being lifted. Foreign matter adhering to the laundry may be separated from the laundry by the physical action of the laundry and the chemical action of the laundry due to the cloud and fall.

The control unit 190 may discharge water from the tub 110. The control unit 190 may operate the drain pump 152 so that water from the tub 110 is discharged. Water from the tub 110 may be pumped to the outside by the drain pump 152.

The control unit 190 may rotate the drum 120 at high speed for intermediate dehydration. The controller 190 may control the motor driving circuit 180 to rotate the drum 120 at a high speed (eg, a rotational speed of about 1000 rpm to 1100 rpm). While the drum 120 rotates at high speed, the laundry inside the drum 120 is positioned along the inner wall of the drum 120, and water absorbed by the laundry may be separated from the laundry by centrifugal force. The water separated from the laundry may pass through the through hole 121a of the drum 120 and be discharged to the outside through the tub 110 and the drainage conduit 151.

Thereafter, the control unit 190 performs a rinsing process 1030. The controller 190 may supply water to the tub 110 and rotate the drum 130 at a low speed for rinsing. The controller 190 may discharge water from the tub 110 and rotate the drum 120 at high speed for intermediate dehydration.

Thereafter, the controller 190 performs a spin-drying process 1040. The controller 190 may rotate the drum 120 at high speed.

Thereafter, the controller 190 performs a drying process 1050.

The controller 190 may operate the duct heater 215 to heat the air inside the tub 110 / drum 120. When the temperature of the internal air of the tub 110 reaches a predetermined temperature, the control unit 190 operates the duct heater 215 and operates the motor driving circuit 180 to rotate the drum 120 at high speed. Can be controlled. The controller 190 may open the condensate valve 246 to supply water to the condensation duct 240.

As described above, the controller 190 may sequentially perform a washing process 1020, a rinsing process 1030, a spin-drying process 1040, and a drying process 1050 in order to wash laundry.

14 illustrates a drying process performed by a washing machine according to an embodiment. FIG. 15 shows the operation of each configuration of the washing machine according to the drying process shown in FIG. 14. 16 and 17 show residual moisture due to the heating/dehydration operation shown in FIG. 14. 18 shows a drying time according to a duct temperature of a washing machine according to an embodiment.

14, 15, 16, 17, and 18, the drying process 1050 of the washing machine 100 will be described.

After the spin-drying process 1040 is finished, the washing machine 100 continuously heats the inside of the tub 110 / drum 120 (1110 ). (Hereinafter referred to as "heating operation".)

After stopping the rotation of the drum 120 for the dehydration process 1040, the control unit 190 uses the duct heater 215 provided inside the heating duct 210 to heat the inside of the tub 110/drum 120. It can be operated. For example, the controller 190 may provide a duct heating signal for turning on the duct heater 215 to the duct heater 215 as shown in FIG. 15.

During the heating operation, the control unit 190 may operate the fan 213 provided inside the heating duct 210 to circulate air between the tub 110 / drum 120 and the drying duct 200. For example, as illustrated in FIG. 15, the controller 190 may provide a blowing signal for rotating the fan 213 during continuous heating to the fan motor 214.

During the heating operation, the controller 190 may rotate the drum 120 at a first rotational speed (low speed, for example, 40rpm to 100rpm) as shown in FIG. 15. While the drum 120 rotates at the first rotational speed, laundry inside the drum 120 may be rolled into the drum 120 by centrifugal force and gravity. For example, while the drum 120 rotates at a low speed, the laundry may be lifted to approximately the center height of the drum 120 together with the drum 120 by centrifugal force and gravity. When the laundry is lifted to approximately the center height of the drum 120, the direction of the centrifugal force becomes the direction opposite to the direction of gravity, and the laundry falls to the lower portion of the drum 120 by gravity. In this way, the laundry is repeatedly lifted in the rotational direction of the drum 120 and dropped to the lower portion of the drum 120, and this operation is referred to as "tumbling" hereinafter.

During the heating operation, the controller 190 may alternately rotate the drum 120 counterclockwise (CCW) or clockwise (CW) as shown in FIG. 15. The time when the controller 190 rotates the drum 120 counterclockwise (CCW) may be different from the time when the controller 190 rotates the drum 120 clockwise (CW). For example, the ratio between the time when the control unit 190 rotates the drum 120 counterclockwise (CCW) and the time when the control unit 190 rotates the drum 120 clockwise (CW) is 5:1 Can be

During the heating operation, the controller 190 may not supply water for condensation to the condensation duct 240. For example, as illustrated in FIG. 15, the control unit 190 may provide an off signal for closing the condensate valve 246 to the condensate valve 246.

Condensation efficiency by water may be low before the internal air of the tub 110 / drum 120 is sufficiently heated. In addition, the rate of increase in the internal temperature of the temperature tub 110 / drum 120 of the condensation duct 240 is decreased, and thus, the drying time may increase. For this reason, while the internal air of the tub 110 / drum 120 is heated, water for condensation may not be supplied to the condensation duct 240.

Optionally, the control unit 190 may operate the tub heater 114 provided inside the tub 110 during the heating operation. For example, the controller 190 may provide a tub heating signal to the tub heater 114.

The washing machine 100 determines whether the internal temperature of the tub 110 is equal to or higher than the first reference temperature (1120).

While heating the air inside the tub 110 / drum 120, the controller 190 may measure the internal temperature of the tub 110. For example, the controller 190 may receive an electrical signal (voltage or current) representing the internal temperature of the tub 110 from the tub temperature sensor 174 at predetermined time intervals (every sampling period).

In addition, the controller 190 may compare the internal temperature of the tub 110 with the first reference temperature in order to determine whether the internal temperature of the tub 110 is equal to or higher than the first reference temperature. The first reference temperature may be set experimentally or empirically, and the first reference temperature may be, for example, approximately 90 degrees Celsius.

If the internal temperature of the tub 110 is not higher than the first reference temperature (No in 1120), the washing machine 100 continues to heat the internal air of the tub 110 / drum 120.

If the internal temperature of the tub 110 is higher than the first reference temperature (example of 1120), the washing machine 100 intermittently heats the air inside the tub 110 / drum 120 and simultaneously heats the drum 120 at high speed. Rotate (1130). (Hereinafter referred to as "heating/spinning operation".)

When the internal temperature of the tub 110 is greater than or equal to the first reference temperature, the control unit 190 intermittently operates the duct heater 215 to maintain the internal temperature of the tub 110 / drum 120 at the first reference temperature. I can. For example, when the internal temperature of the tub 110 is less than the first reference temperature, the control unit 190 operates the duct heater 215, and when the internal temperature of the tub 110 exceeds the first reference temperature, the duct heater ( 215) can be stopped.

During the heating/dehydration operation, the control unit 190 may operate the fan 213 provided inside the heating duct 210 to circulate air between the tub 110 / drum 120 and the drying duct 200. . For example, as shown in FIG. 15, the controller 190 may provide a blowing signal for rotating the fan 213 during intermittent heating to the fan motor 214.

During the heating/spinning operation, the controller 190 may rotate the drum 120 at a second rotational speed (high speed, for example, 1000rpm to 1600rpm) for spinning. While the drum 120 rotates at the second rotational speed, laundry may be attached to the inner wall of the drum 120 by centrifugal force. In addition, water absorbed by the laundry may be separated to the outside of the drum 120 through the through hole 121a of the drum 120.

As the temperature of the laundry absorbing water increases or decreases, the amount of water separated from the laundry may increase. Specifically, as the temperature of the water increases, the surface tension decreases. For example, the surface tension of water at 25 degrees Celsius may be approximately 0.0712 Nm (Newton-meter), and the surface tension of water at 55 degrees Celsius may be approximately 0.0671 Nm.

Due to the decrease in surface tension, water can be easily separated from the laundry. For example, the residual moisture content (RMC) of the laundry after rinsing is approximately 45% as shown in (a) of FIG. 16, and the residual moisture content (RMC) of the laundry after dehydration is ( As shown in b), it may be approximately 38%. After dehydration at the same time as heating, the residual moisture content (RMC) of the laundry may be 33% as shown in FIG. 16C.

In addition, as shown in FIG. 17, as the temperature of the laundry increases or decreases, the residual moisture content (RMC) of the laundry changes. For example, if the temperature of the laundry is about 65 degrees Celsius, the residual moisture content (RMC) of the laundry is about 35.5%, and when the temperature of the laundry is about 75 degrees Celsius, the residual moisture content (RMC) of the laundry is about 34%, If the temperature of the laundry is about 80 degrees Celsius, the residual moisture content (RMC) of the laundry may be about 33%.

As such, by performing heating and dehydration at the same time, the washing machine 100 can improve dehydration efficiency for drying, thereby reducing time for drying.

During the heating/dehydration operation, the control unit 190 may not supply water for condensation to the condensation duct 240. For example, as illustrated in FIG. 15, the control unit 190 may provide an off signal for closing the condensate valve 246 to the condensate valve 246.

The washing machine 100 determines whether the heating/dehydration time is greater than or equal to the first reference time (1140).

The control unit 190 may determine a time when the heating/dehydration operation is performed during the heating/dehydration operation, and compare the heating/dehydration time with a first reference time (for example, any one of 5 minutes to 10 minutes). . The first reference time may be set experimentally or empirically, and may vary according to the amount of laundry. For example, as the amount of laundry increases, the first reference time may increase. In other words, as the amount of laundry increases, the heating/dehydration time may increase.

If the heating/dehydration time is not more than the first reference time (No in 1140), the washing machine 100 may continue the heating/dehydration operation.

If the heating/dehydration time is greater than or equal to the first reference time (example of 1140), the washing machine 100 intermittently heats the air inside the tub 110 / drum 120 and the inside of the tub 110 / drum 120 Water vapor contained in the air is condensed (1150). (Hereinafter referred to as "heating/condensing operation".)

After the end of the heating/dehydration operation, the control unit 190 can intermittently operate the duct heater 215 to maintain the internal temperature of the tub 110 / drum 120 at the first reference temperature or the second reference temperature. have. For example, as shown in FIG. 15, the control unit 190 maintains the internal temperature of the tub 110/drum 120 at a second reference temperature greater than the first reference temperature after heating/dehydration is completed. The heater 215 may be intermittently operated. As shown in FIG. 18, due to an increase in the internal temperature of the tub 110 / drum 120 during the drying operation, the drying time of the washing machine 100 decreases. Therefore, in order to reduce the time of the drying process, the control unit 190 adjusts the internal temperature of the tub 110 / drum 120 during the drying operation after heating / dehydration. It can be kept higher than the internal temperature.

However, the present invention is not limited thereto, and the control unit 190 adjusts the internal temperature of the tub 110 / drum 120 after the end of heating / dehydration is equal to the internal temperature of the tub 110 / drum 120 during heating / dehydration. In order to maintain the first reference temperature, the duct heater 215 may be intermittently operated.

During the heating and condensing operation, the control unit 190 may operate the fan 213 provided inside the heating duct 210 to circulate air between the tub 110 / drum 120 and the drying duct 200.

During the heating and condensing operation, the control unit 190 may rotate the drum 120 at a first rotation speed (low speed, for example, 40 rpm to 100 rpm). While the drum 120 rotates at the first rotational speed, laundry inside the drum 120 may be tumbled inside the drum 120 by centrifugal force and gravity. The controller 190 may rotate the drum 120 alternately in a counterclockwise direction (CCW) or a clockwise direction (CW), as shown in FIG. 15.

During the heating and condensation operation, the control unit 190 may supply water for condensation to the condensation duct 240 for efficient drying. For example, as shown in FIG. 15, a condensate signal for opening the condensate valve 246 may be provided to the condensate valve 246. Due to the opening of the condensate valve 246, water for condensation is supplied to the condensation duct 240 and water may flow along the inner wall of the condensation duct 240.

Air heated by the heating duct 210 may absorb water vapor from the laundry passing through the tub 110 and the drum 120. The water vapor absorbed by the air may be condensed by water flowing along the inner wall of the condensing duct 240 while the air passes through the condensing duct 240. Air condensed with water vapor may be heated again in the heating duct 210.

As such, the air inside the tub 110 and the drum 120 may be dried by condensation in the condensation duct 240 and heating in the heating duct 210.

The washing machine 100 determines whether the condensation/heating time for drying is greater than or equal to the second reference time (1160).

The control unit 190 may determine a time when the condensation/heating operation is performed during the condensation/heating operation, and compare the condensation/heating time with the second time period. The second reference time may be set experimentally or empirically, and may vary according to the amount of laundry.

If the condensing/heating time is not more than the second reference time (No in 1160), the washing machine 100 may continue the condensing/heating operation.

When the condensing/heating time is greater than or equal to the second reference time (example of 1160), the washing machine 100 cools the interior of the tub 110/drum 120 (1170). (Hereinafter referred to as "cooling operation")

After the condensation/heating operation ends, the control unit 190 may stop heating the air inside the tub 110 / drum 120. For example, as illustrated in FIG. 15, the controller 190 may provide an off signal for stopping the duct heater 215 to the duct heater 215.

During the cooling operation, the control unit 190 may operate the fan 213 provided inside the heating duct 210 to circulate air between the tub 110 / drum 120 and the drying duct 200.

During the cooling operation, the controller 190 may rotate the drum 120 at a first rotational speed (low speed, for example, 40rpm to 100rpm). The controller 190 may rotate the drum 120 alternately in a counterclockwise direction (CCW) or a clockwise direction (CW), as shown in FIG. 15.

During the cooling operation, the control unit 190 may supply water to the condensation duct 240 to cool the internal air of the tub 110 / drum 120 more quickly. For example, as shown in FIG. 15, a condensate signal for opening the condensate valve 246 may be provided to the condensate valve 246.

The air inside the tub 110 / drum 120 may be cooled by contacting water in the condensing duct 240.

In addition, the washing machine 100 may intermittently discharge water from the tub 110 to the outside during the drying process. For example, as shown in FIG. 15, the control unit 190 may intermittently operate the drainage pump 152 during the drying process.

As described above, the washing machine 100 may perform a heating operation, a heating/dehydration operation, a condensation/heating operation, and a cooling operation during the drying process 1050. In particular, during the heating/dehydration operation, the washing machine 100 intermittently heats the internal air of the tub 110/drum 120 so that the internal air of the tub 110/drum 120 maintains a high temperature, and simultaneously dehydrates. For this purpose, the drum 120 may be rotated at high speed. By the heating/dehydration operation, the residual moisture content (RMC) of the laundry may further decrease and the drying time may be reduced.

19 illustrates a filter cleaning operation of a washing machine according to an embodiment. 20 shows the amount of water flowing into the drum when washing the filter according to the rotational speed of the drum.

19 and 20, the filter washing operation 1200 of the washing machine 100 will be described.

The washing machine 100 performs a drying process 1050 after the spin-drying process 1040 (1210).

During the drying process 1050, the control unit 190 may perform a heating operation, a heating/dehydration operation, a condensation/heating operation, and a cooling operation.

The washing machine 100 determines whether the filter 221 is clogged during the drying process 1050 (1220).

Lint or dust is separated from the laundry by rotation of the drum 120 during the drying process, and the lint or dust may be filtered by the filter 221. As the drying process proceeds, the amount of lint or dust filtered by the filter 221 increases, and the filter 221 may be clogged by the filtered lint or dust.

The controller 190 may determine whether the filter 221 is clogged based on the internal temperature of the tub 110 and/or the internal temperature of the heating duct 210.

For example, the controller 190 may determine whether the filter 221 is clogged based on the internal temperature of the tub 110 measured by the tub temperature sensor 174. Specifically, the controller 190 may determine whether the filter 221 is clogged based on a change in the internal temperature of the tub 110.

During the drying process 1050, the control unit 190 may intermittently operate the duct heater 215, and the fan motor 214 is operated so that the air circulates the drying duct 200 and the tub 110/drum 120. It can be operated. During operation of the duct heater 215, the internal temperature of the tub 110 may increase, and during the stop of the duct heater 215, the internal temperature of the tub 110 may decrease. Therefore, a change in the internal temperature of the tub 110 measured by the tub temperature sensor 174 is large. On the other hand, when the filter 221 is blocked by lint or first, the air inside the tub 110 / drum 120 cannot circulate through the drying duct 200. Therefore, a change in the internal temperature of the tub 110 due to the operation and stop of the duct heater 215 is small.

Therefore, if the change in the internal temperature of the tub 110 measured by the tub temperature sensor 174 is greater than or equal to the reference value, the controller 190 identifies that the filter 221 is not clogged, and the internal temperature of the tub 110 is If the change is less than the reference value, the control unit 190 may identify that the filter 221 is clogged.

As another example, the controller 190 is based on a difference between the internal temperature of the tub 110 measured by the tub temperature sensor 174 and the internal temperature of the heating duct 210 measured by the duct temperature sensor 175 Whether the filter 221 is clogged can be determined.

Due to the operation of the fan 213, the air circulates through the heating duct 210 and the tub 110/drum 120, so the internal temperature of the tub 110 and the heating duct measured by the duct temperature sensor 175 ( 210) the difference between the internal temperature is small. On the other hand, if the filter 221 is clogged by lint or first, the air cannot circulate the heating duct 210 and the tub 110 / drum 120, so the internal temperature of the tub 110 and the duct temperature sensor 175 The difference between the internal temperature of the heating duct 210 measured by is large.

Therefore, if the difference between the internal temperature of the tub 110 and the internal temperature of the heating duct 210 measured by the duct temperature sensor 175 is less than the reference value, the control unit 190 identifies that the filter 221 is not clogged. And, if the difference between the internal temperature of the tub 110 and the internal temperature of the heating duct 210 measured by the duct temperature sensor 175 is greater than or equal to the reference value, the control unit 190 identifies that the filter 221 is clogged. I can.

When clogging of the filter 221 is identified (YES in 1220), the washing machine 100 rotates the drum 120 at a third rotational speed (1230).

When clogging of the filter 221 is identified, the control unit 190 may spray water onto the filter 221 as described below. The sprayed water may flow into the tub 110 through the suction port 112c and flow along the sidewall of the tub 110. Water flowing along the sidewall of the tub 110 may be introduced into the drum 120 by rotation of the drum 120.

In order to prevent water from flowing into the drum 120 for cleaning the filter 221, the control unit 190 rotates the drum 120 at a third rotational speed from the motor driving circuit 180. The driving current supplied to the motor 130 may be controlled.

As previously described with reference to FIG. 14, the control unit 190 is a driving current supplied to the drum motor 130 from the motor driving circuit 180 to rotate the drum 120 at a first rotational speed during the condensing/heating operation. Can be controlled.

The third rotational speed during filter washing may be greater than the first rotational speed during condensing/heating operation. As shown in FIG. 20, when the rotational speed of the drum 120 is approximately 120 rpm, the amount of water sprayed to clean the filter 221 flows into the drum 120 is minimized. For example, the third rotational speed may be set to approximately 120rpm, and the third rotational speed may be greater than the first rotational speed of approximately 40rpm to 100rpm.

The washing machine 100 cleans the filter 221 (1240).

The control unit 190 may control the washing water valve 224 to spray water for washing through the filter 221 while rotating the drum 120 at a third rotational speed. For example, the control unit 190 may provide a filter washing signal to the washing water valve 224 to open the washing water valve 224.

The washing machine 100 restores the rotational speed of the drum 120 (1250).

The controller 190 may restore the rotational speed of the drum 120 to the rotational speed before washing the filter 221. For example, when washing the filter 221 during condensation/heating operation, the control unit 190 can rotate the rotation speed of the drum 120 at a first rotation speed (low speed, for example, 40 rpm to 100 rpm). have.

As described above, when the filter 221 is clogged by lint or dust, the washing machine 100 may control the rotational speed of the drum 120 and spray water for washing onto the filter 221. Accordingly, it may be minimized that water for washing the filter 221 flows into the drum 120.

21 is a side cross-sectional view of a washing machine according to an embodiment. 22 shows a configuration of a washing machine according to an embodiment.

As shown in Fig. 21, the washing machine 100 includes a cabinet 101, a tub 110, a drum 120, a pulsator 125, a first motor 130a, a second motor 130b, and a water supply unit. It includes 140, a drain unit 150, a detergent supply unit 160, and a drying duct 200.

The cabinet 101, the tub 110, the water supply unit 140, the drain unit 150, the detergent supply unit 160, and the drying duct 200 may be the same as shown in FIG. 2.

The drum 120 is rotatably provided in the tub 110. The drum 120 may accommodate laundry therein.

The pulsator 125 is provided inside the rear of the drum 120 and is provided rotatably with respect to the drum 120. The pulsator 125 may be provided to be rotatable independently of the drum 120. In other words, the pulsator 125 may rotate in the same direction as the drum 120 or in a different direction from the drum 120. The rotation axis of the pulsator 125 may be provided on the same axis as the rotation axis of the drum 120.

The pulsator 125 may generate water flow in the front and rear directions inside the drum 120 during washing. The washing performance of the washing machine 100 may be improved by the pulsator 125.

The first motor 130a is connected to the first drive shaft 131a and may provide rotation for rotating the drum 120 to the first drive shaft 131a. The first driving shaft 131a may provide rotation of the first motor 130a to the first pulley 136a through the first belt 135a. The first pulley 136a is connected to the drum 120 through the first driven shaft 137a and may provide rotation of the first motor 130a to the drum 120.

The second motor 130b is connected to the second driving shaft 131b and may provide rotation for rotating the pulsator 125 to the second driving shaft 131b. The second drive shaft 131b may provide rotation of the second motor 130b to the second pulley 136b through the second belt 135b. The second pulley 136b is connected to the pulsator 125 through the second driven shaft 137b, and may provide rotation of the second motor 130b to the pulsator 125.

The first driven shaft 137a is provided on the same axis as the second driven shaft 137b. For example, a hollow into which the second driven shaft 137b is inserted is formed at approximately the center of the first driven shaft 137a. Accordingly, the first driven shaft 137a may rotate in a different direction and/or at a different speed than the second driven shaft 137b on the same axis as the second driven shaft 137b.

22, the washing machine 100 includes a user input unit 171, a display 172, a water level sensor 173, a tub temperature sensor 174, a duct temperature sensor 175, and a first driving circuit 181. ), the first motor 130a, the second driving circuit 182, the second motor 130b, the water supply valve 142, the drain pump 152, the fan motor 214, the tub heater 114, and the duct heater It includes 215, a washing water valve 224, a condensate valve 246 and a control unit 190.

User input unit 171, display 172, water level sensor 173, tub temperature sensor 174, duct temperature sensor 175, water supply valve 142, drain pump 152, fan motor 214, and tub The heater 114, the duct heater 215, the washing water valve 224, and the condensate water valve 246 may be the same as described with reference to FIG. 12.

The first driving circuit 181 may provide a first driving current for rotating the drum 120 to the first motor 130a. The second driving circuit 182 may provide a second driving current for rotating the pulsator 125 to the second motor 130b. For example, each of the first driving circuit 181 and the second driving circuit 182 may convert AC power of an external power source into driving power for driving each of the first motor 130a and the second motor 130b. Can

The control unit 190 includes a first motor 130a and a first motor 130a to rotate the drum 120 and the pulsator 125 during the washing process 1020, the rinsing process 1030, the spinning process 1040, and the drying process 1050. The second motor 130b may be controlled. Specifically, the controller 190 may control a driving current supplied to the first motor 130a and the second motor 130b from the first driving circuit 181 and the second driving circuit 182.

The control unit 190, in order to rotate the drum 120 and the pulsator 125 during the heating operation, heating / dehydration operation, heating / condensation operation and cooling operation of the drying process 1050, the first driving circuit 181 And the driving current supplied to the first motor 130a and the second motor 130b from the second driving circuit 182 may be controlled.

During the heating operation, heating/condensing operation and cooling operation of the drying process 1050, the control unit 190 controls the first motor 130a and the first motor 130a so that the drum 120 and the pulsator 125 rotate in the same direction. 2 It is possible to control the motor (130b).

During the heating operation, heating/condensing operation, and cooling operation of the drying process 1050, the controller 190 rotates the drum 120 at a first rotational speed (for example, approximately 40rpm to 100rpm). ) Through the control of the first motor (130a). In addition, during the heating operation, heating/condensing operation, and cooling operation of the drying process 1050, the control unit 190 uses the second motor through the second driving circuit 182 to rotate the pulsator 125 at a fourth rotation speed. 130b) can be controlled. The fourth rotation speed may be the same as the first rotation speed or may be greater than the first rotation speed. For example, the ratio of the fourth rotation speed and the first rotation speed may be approximately 1:1 to 5:1.

As such, during the heating operation, heating/condensing operation, and cooling operation, the pulsator 125 may rotate in the same direction as the rotation direction of the drum 120 at a rotation speed different from the rotation speed of the drum 120.

As the pulsator 125 rotates in the same rotational direction as the drum 120, twisting of laundry during the drying process 1050 may be reduced. In addition, since the twist of the laundry is reduced, the drying efficiency of the laundry may be improved.

Washing machine tub; A drum provided to rotate in the tub; A condensation duct formed on the inner wall of the tub; A heating duct provided on the outside of the tub; A duct heater provided inside the heating duct; A fan for circulating air in the drum, condensation duct and heating duct; And a control unit rotating the drum at a first rotational speed so that laundry contained in the drum is tumbled while controlling the duct heater to heat the air circulating by the fan. While controlling the duct heater to heat the circulating air, the controller may rotate the drum at the second rotational speed to separate water from the laundry accommodated in the drum.

For this reason, the washing machine can simultaneously perform heating and dehydration. Since the surface tension of water is reduced by heating, the washing machine can reduce the amount of water contained in the laundry by simultaneously heating and dehydrating. In addition, the washing machine can reduce the drying time for drying laundry.

The washing machine includes a condensate conduit extending from an external water source to a condensing duct; And a condensate valve provided on the condensate conduit to allow or block the supply of water to the condensate duct.

The controller may control the condensate valve to block supply of water to the condensation duct while controlling the duct heater to heat the circulating air and rotating the drum to separate water from the laundry contained in the drum.

For this reason, the washing machine can prevent dehydration from being obstructed by the water in the condensing duct.

The control unit may control the duct heater to heat the circulating air and control the condensate valve to allow water to be supplied to the condensation duct while rotating the drum so that the laundry contained inside the drum tumbling.

For this reason, the washing machine can dry laundry through heating and condensation.

The control unit rotates the drum alternately in a first direction and a second direction so that the laundry contained in the drum tumbling, and the time for rotating the drum in the first direction may be different from the time for rotating the drum in the second direction. .

Accordingly, the washing machine can effectively guide the air inside the drum to the condensing duct, and further reduce the drying time.

The condensation duct may include a rear groove formed inside the rear wall of the tub having a cylindrical shape, and a cover that partitions the inside of the rear groove from the inside of the tub.

Due to this, the condensation duct can be formed integrally with the tub. In addition, due to the condensation duct, the overall size of the washing machine or the size of the drum may be prevented from becoming smaller.

The condensation duct may be formed along a part of the side wall of the tub having a cylindrical shape.

The condensation duct may have a horseshoe shape.

At both ends of the condensation duct, inlets for connecting the condensation duct to the inside of the tub may be formed.

The washing machine includes a filter for filtering foreign substances contained in the air sucked through the heating duct; A washing nozzle for spraying water onto the filter; A washing water conduit extending from an external water source to the washing nozzle; And a washing water valve that allows or blocks water to be supplied to the washing nozzle provided on the washing water conduit. The control unit may rotate the drum at a third rotational speed while controlling the washing water valve to allow supply of water to the washing nozzle, and the third rotational speed may be greater than the first rotational speed and less than the second rotational speed. have.

For this reason, the washing machine can minimize the inflow of water for washing the filter into the drum.

The washing machine may further include a pulsator that is provided inside the rear of the drum having a cylindrical shape and rotates independently of the drum. The control unit rotates the drum at a first rotational speed and rotates the pulsator at a fourth rotational speed in the same direction as the drum while controlling the duct heater and fan to heat the air circulating in the drum, condensing duct and heating duct. , The fourth rotation speed may be greater than the first rotation speed.

For this reason, the washing machine can prevent the laundry inside the drum from being twisted by the pulsator.

The control method for a washing machine including a tub and a drum provided to rotate within the tub is to allow laundry contained in the drum to tumble while heating the heating duct provided outside the tub, the condensation duct provided inside the tub, and the air circulating in the drum. Rotating the drum at a first rotational speed; While heating the air circulating in the heating duct and the condensing duct and the drum, rotating the drum at a second rotational speed to separate water from laundry contained within the drum.

For this reason, the washing machine can simultaneously perform heating and dehydration. Since the surface tension of water is reduced by heating, the washing machine can reduce the amount of water contained in the laundry by simultaneously heating and dehydrating. In addition, the washing machine can reduce the drying time for drying laundry.

Rotating the drum at the first rotational speed allows heating the heating duct and the circulating air and allowing water to be supplied to the condensation duct while rotating the drum at the first rotational speed so that the laundry contained within the drum tumbling. Can include.

Rotating the drum at the first rotational speed means rotating the drum alternately in a first direction and a second direction so that the laundry contained in the drum tumbling, and the time for rotating the drum in the first direction is the time for rotating the drum in the second direction. It can be different from the rotation time.

Accordingly, the washing machine can effectively guide the air inside the drum to the condensing duct, and further reduce the drying time.

Rotating the drum at the second rotational speed includes blocking water supply to the condensation duct while rotating the drum at the second rotational speed to heat the circulating air and separate water from the laundry contained within the drum. can do.

Washing machine tub; A drum provided to rotate in the tub; A drum motor for rotating the drum; A condensation duct formed on the inner wall of the tub; A condensate conduit supplying water to the condensation duct; A condensate valve provided on the condensate conduit to allow or block water supply to the condensate duct; A heating duct provided on the outside of the tub; A duct heater provided inside the heating duct; A fan for circulating air in the drum, condensation duct and heating duct; And a control unit electrically connected to the drum motor, the condensate valve, the duct heater, and the fan. The condensation duct may include a rear groove formed inside the rear wall of the tub having a cylindrical shape, and a cover that partitions the inside of the rear groove from the inside of the tub.

Due to this, the condensation duct can be formed integrally with the tub. In addition, due to the condensation duct, the overall size of the washing machine or the size of the drum may be prevented from becoming smaller.

The condensation duct may be formed along a part of the side wall of the tub having a cylindrical shape.

At both ends of the condensation duct, inlets for connecting the condensation duct to the inside of the tub may be formed.

The control unit may rotate the drum to separate water from laundry contained in the drum while controlling the duct heater to heat the air circulating by the fan and controlling the condensate valve to block supply of water to the condensation duct. .

The control unit may rotate the drum such that laundry contained within the drum tumbling while controlling the duct heater to heat the air circulating by the fan and controlling the condensate valve to allow water to be supplied to the condensation duct.

Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium storing instructions executable by a computer. The instruction may be stored in the form of a program code, and when executed by a processor, a program module may be generated to perform the operation of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

Computer-readable recording media include all kinds of recording media in which instructions that can be read by a computer are stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage device, and the like.

As described above, the disclosed embodiments have been described with reference to the accompanying drawings. Those of ordinary skill in the art to which the published embodiments belong will understand that the disclosed embodiments may be implemented in a different form from the disclosed embodiments without changing the technical spirit or essential features of the published embodiments. The disclosed embodiments are illustrative and should not be construed as limiting.

100: washing machine 101: cabinet
101a: inlet port 102: door
103: control panel 110: tub
111: tub front part 111a: opening
111b: exhaust port 112: tub rear part
112a: rear wall 112b: side wall
112c: suction port 112d: bearing
112e: bearing housing 112f: first rib
112g: second rib 113: diaphragm
114: tub heater 120: drum
121: drum body 121a: through hole
121b: lifter 122: drum front part
122a: opening 123: drum rear part
130: drum motor 131: shaft
132: stator 133: rotor
140: water supply part 141: water supply conduit
142: water supply valve 150: drain
151: drain conduit 152: drain pump
160: detergent supply unit 161: detergent compartment
162: mixing conduit 171: user input unit
171a: dial 171b: enter button
172: display 173: water level sensor
173a: connecting hose 174: tub temperature sensor
175: duct temperature sensor 180: motor drive circuit
190: control unit 191: processor
192: memory 201: drying duct
210: heating duct 211: duct top plate
212: lower duct plate 213: fan
214: fan motor 215: duct heater
220: filter housing 221: filter
222: washing water nozzle 223: washing water conduit
224: wash water valve 230: connection conduit
240: condensation duct 241: rear groove
242: cover 243a: first inlet
243b: second inlet 244a: first condensing nozzle
244b: second condensing nozzle 245: condensate conduit
246: condensate valve 247: side groove
247a: protruding portion 248a: first protrusion
248b: second protrusion

Claims (20)

Tub;
A drum provided to rotate within the tub;
A condensation duct formed on the inner wall of the tub;
A heating duct provided outside the tub;
A duct heater provided inside the heating duct;
A fan for circulating air in the drum, the condensation duct, and the heating duct; And
While controlling the duct heater to heat the air circulated by the fan, a control unit for rotating the drum at a first rotational speed so that laundry accommodated in the drum tumbling,
The controller rotates the drum at a second rotational speed to separate water from laundry accommodated in the drum while controlling the duct heater to heat the circulating air. The method of claim 1,
A condensate conduit extending from an external water source to the condensation duct; And
A washing machine further comprising a condensate valve provided on the condensate conduit to allow or block water supply to the condensate duct. The method of claim 2,
The control unit, while controlling the duct heater to heat the circulating air and rotating the drum to separate water from the laundry accommodated in the drum, the condensate valve to block the supply of water to the condensation duct. Washing machine to control. The method of claim 2,
The control unit controls the duct heater to heat the circulating air and controls the condensate valve to allow water to be supplied to the condensation duct while rotating the drum so that the laundry accommodated in the drum is tumbling. washer. The method of claim 2,
The control unit rotates the drum alternately in a first direction and a second direction so that the laundry accommodated in the drum tumbling,
A washing machine in which a time for rotating the drum in the first direction is different from a time for rotating the drum in the second direction. The method of claim 1,
The condensing duct is a washing machine comprising a rear groove formed inside a rear wall of the tub having a cylindrical shape, and a cover partitioning the inside of the rear groove from the inside of the tub. The method of claim 6,
The condensation duct is formed along a portion of the side wall of the tub having the cylindrical shape. The method of claim 6,
The condensation duct is a washing machine having a horseshoe shape. The method of claim 7,
A washing machine having inlets at both ends of the condensation duct to connect the condensation duct to the inside of the tub. The method of claim 1,
A filter for filtering foreign substances contained in the air sucked through the heating duct;
A washing nozzle spraying water onto the filter;
A washing water conduit extending from an external water source to the washing nozzle; And
Further comprising a washing water valve for allowing or blocking the supply of water to the washing nozzle provided on the washing water conduit,
The control unit rotates the drum at a third rotational speed while controlling the washing water valve to allow supply of water to the washing nozzle,
The third rotation speed is greater than the first rotation speed and less than the second rotation speed. The method of claim 1,
It is provided on the inside of the rear surface of the drum having a cylindrical shape, further comprising a pulsator rotating independently of the drum,
The control unit, while controlling the duct heater and the fan to heat the air circulating in the drum, the condensation duct, and the heating duct, rotate the drum at a first rotational speed, and make the pulsator the same as the drum. Rotate at the fourth rotational speed in the direction,
The fourth rotation speed is greater than the first rotation speed. In the control method for a washing machine comprising a tub and a drum provided to rotate within the tub,
While heating the heating duct provided outside the tub, the condensing duct provided inside the tub, and the air circulating in the drum, rotating the drum at a first rotational speed so that the laundry contained in the drum tumbling;
While heating the heating duct, the condensing duct, and the air circulating in the drum, the control method of a washing machine comprising rotating the drum at a second rotational speed to separate water from the laundry accommodated in the drum. The method of claim 12, wherein rotating the drum at a first rotational speed,
Heating the heating duct and the circulating air, and allowing water to be supplied to the condensation duct while rotating the drum at a first rotational speed so that laundry contained in the drum tumbling. . The method of claim 12, wherein rotating the drum at a first rotational speed,
A time for rotating the drum in a first direction and a second direction alternately so that the laundry contained in the drum tumbling, and rotating the drum in the first direction is different from the time for rotating the drum in the second direction. How to control the washing machine. The method of claim 12, wherein rotating the drum at a second rotational speed,
And cutting off supply of water to the condensation duct while rotating the drum at a second rotational speed to heat the circulating air and separate water from laundry contained in the drum. Tub;
A drum provided to rotate within the tub;
A drum motor rotating the drum;
A condensation duct formed on the inner wall of the tub;
A condensate conduit for supplying water to the condensation duct;
A condensate valve provided on the condensate conduit to allow or block water supply to the condensate duct;
A heating duct provided outside the tub;
A duct heater provided inside the heating duct;
A fan for circulating air in the drum, the condensation duct, and the heating duct; And
And a control unit electrically connected to the drum motor, the condensate valve, the duct heater, and the fan,
The condensing duct is a washing machine comprising a rear groove formed inside a rear wall of the tub having a cylindrical shape, and a cover partitioning the inside of the rear groove from the inside of the tub. The method of claim 16,
The condensation duct is formed along a portion of the side wall of the tub having the cylindrical shape. The method of claim 17,
A washing machine having inlets at both ends of the condensation duct to connect the condensation duct to the inside of the tub. The method of claim 16,
The control unit, while controlling the duct heater to heat the air circulated by the fan and controlling the condensate valve to block supply of water to the condensing duct, separate water from the laundry accommodated in the drum. A washing machine that rotates the drum. The method of claim 16,
The control unit controls the duct heater to heat the air circulated by the fan and controls the condensate valve to allow supply of water to the condensation duct, while the drum so that the laundry accommodated in the drum is tumbled. Washing machine to rotate the machine.

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