KR102100256B1 - Drum Washing Machine - Google Patents

Abstract

The present invention relates to a drum washing machine, and relates to a drum washing machine with an improved structure of a drying duct to prevent accumulation of lint inside the drying duct of the drum washing machine.
One aspect of the present invention is a cabinet, a tub disposed inside the cabinet, a drum disposed rotatably inside the tub, a drying device for drying laundry in the drum, and a seating portion in which a blower fan for circulation of air is located It is provided to protrude from the outer circumferential surface of the seating portion, and provides a drum washing machine characterized in that it comprises a plurality of first lint collecting parts to prevent the lint from flowing into the blowing fan.
The drum washing machine of the present invention can improve the structure of the drying device and the connecting member connecting the drying device and the tub, thereby collecting lint and efficiently removing the lint. Therefore, it is possible to prevent the deterioration of the performance of the drying device due to the accumulation of lint inside the drying device.

Description

Drum Washing Machine

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine having an improved structure of a drying duct to prevent accumulation of lint inside the drying duct of the drum washing machine.

In general, a drum washing machine having a drying function is provided with a drying device for drying the laundry by blowing the heat generated by the drying heater into an accommodation space in which the laundry is accommodated. After the dehydration is completed, the drying function is performed.

In general, the drying apparatus of the washing machine supplies hot air heated by the heating apparatus to the inside of the drum to heat the laundry, thereby evaporating the moisture of the laundry, and condensing the evaporated moisture to discharge, thereby drying the laundry.

When the laundry is dried using such a drying device, lint (lint, lint) is generated. Such a lint is often attached to a blower fan in a drying apparatus or attached to a heater to a blower fan, which often causes component failure, thereby deteriorating the performance of the dryer. Therefore, it is necessary to prevent lint from accumulating inside the drum washing machine.

One aspect of the present invention to improve the structure of the drying duct provides a drum washing machine that can prevent the lint from entering the drying duct from the tub to prevent the function of the drying duct from being deteriorated.

In addition, another aspect of the present invention provides a drum washing machine that can easily remove lint in the drying duct by improving the structure of the drying duct.

One aspect of the present invention is a cabinet, a tub disposed inside the cabinet, a drum disposed rotatably inside the tub, a drying device for drying laundry in the drum, and a blower fan for air circulation. It provides a drum washing machine characterized in that it comprises a plurality of first lint collecting portion for preventing the lint from flowing into the blowing fan is provided to protrude from the seating portion, the outer peripheral surface of the seating portion.

The first lint collecting portion may be provided to extend in the tub direction from the seating portion.

The first lint collecting portion may be provided to extend from the outer portion of the seating portion toward the center of the seating portion.

The lengths of the first lint collecting parts may be provided to be different.

The length of the first center lint collecting portion located at the center of the first lint collecting portion may be longer than the length of the first outer lint collecting portion positioned at both outer sides.

The first lint collecting portion may be narrowed in a direction extending from the seating portion.

It may further include a connecting member for mediating the coupling of one side of the drying device and one side of the tub.

A plurality of second lint collecting portions protruding in the center direction of the connecting member may be provided on the inner surface of the connecting member.

The second lint collecting portion may be provided to surround the inner wall of the connecting member

The second lint collecting part may be made of a flexible material.

At least one communicating portion may be provided on at least one surface of the seating portion so that dry air outside the tub can be introduced.

The communication portion may be formed by a concave surface in which at least a portion of the seating portion is concavely dug.

Another aspect of the present invention is a cabinet, a tub disposed inside the cabinet, a drum rotatably disposed inside the tub, and a blower fan circulating air to perform drying of laundry in the drum is located inside The drying device, a connecting member that mediates the combination of the drying device and the tub, is provided integrally with at least one of the drying device and the connecting member, and a lint collecting part for preventing lint from entering the blowing fan It provides a drum washing machine characterized in that it comprises.

The lint collecting unit may include a first lint collecting unit provided inside the drying apparatus and a second lint collecting unit provided inside the connecting member.

The first lint collecting portion may protrude in the tub direction from a seating portion where the blowing fan is located.

The first lint collecting portion may protrude from the outer portion of the seating portion where the blowing fan is located toward the center of the seating portion.

The second lint collecting portion includes a plurality of protrusions, and the plurality of protrusions may be located in the circumferential direction of the inner wall of the connecting member.

Another aspect of the present invention is a cabinet, a tub disposed inside the cabinet, a drum disposed rotatably inside the tub, a drying device for drying laundry in the drum, a blower fan for circulation of air It provides a drum washing machine, characterized in that the seating portion is located, located on one side of the seating portion, and includes at least one communication portion through which the dry air outside the tub is introduced by the blowing fan.

The communication portion may be formed by a concave surface in which at least a portion of the seating portion is concavely dug.

Further comprising a connecting member for mediating the combination of the drying device and the tub, the drying device and the lining collecting portion for integrally provided inside the at least one of the connecting member to prevent the lint from entering the blowing fan It can contain.

The drum washing machine of the present invention can improve the structure of the drying device and the connecting member connecting the drying device and the tub, thereby collecting lint and efficiently removing the lint. Therefore, it is possible to prevent the deterioration of the performance of the drying device due to the accumulation of lint inside the drying device.

In addition, according to an embodiment of the present invention, due to the improvement in the structure of the seating portion, it is possible to increase the condensation efficiency of the humid air absorbing the moisture of the laundry.

1 is a view showing a cross section of a drum washing machine according to an embodiment of the present invention.
2 is an exploded view of a drum washing machine according to an embodiment of the present invention.
3 is a view showing a drying apparatus according to an embodiment of the present invention.
4 is a view showing a cross-section of a drying apparatus according to an embodiment of the present invention.
5 is a view showing a seating portion according to an embodiment of the present invention.
6 is a view showing a seating portion according to another embodiment of the present invention.
7 is a view showing a drying apparatus according to another embodiment of the present invention.
8 is a view showing a seating portion according to another embodiment of the present invention.
9 is a view showing the air flow of the drum washing machine according to another embodiment of the present invention.
10 is a view showing a connecting member according to an embodiment of the present invention.
11 is a view showing a state in which the lint is collected in the second lint collecting portion of the connecting member according to an embodiment of the present invention.
12 is a view showing a state in which the second lint collecting portion of the connecting member according to an embodiment of the present invention is washed off by the water supply.
13 is a view showing a connecting member according to another embodiment of the present invention.
14 is a view showing a water supply structure of a drying apparatus according to an embodiment of the present invention.
15 is a view showing a water supply structure of a drying apparatus according to another embodiment of the present invention.
16 is a flow chart showing the operation of the drum washing machine according to an embodiment of the present invention.
17 is a flow chart showing the operation of the drum washing machine according to another embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a cross section of a drum washing machine according to an embodiment of the present invention, and FIG. 2 is an exploded view of a drum washing machine according to an embodiment of the present invention.

1 and 2, the drum washing machine 1 is disposed rotatably inside the cabinet 10, the tub 20 disposed inside the cabinet 10, and the tub 20. A drum 30 and a motor 7 for driving the drum 30 are provided.

The tub 20 may include a first tub 21 positioned in front of the inside of the cabinet 10 and a second tub 22 coupled to a rear portion of the first tub 21. The first tub 21 includes a cylindrical portion provided in a circumferential direction, and a front plate located on the front surface of the cylindrical portion. The second tub 22 includes a cylindrical portion provided in a circumferential direction and a rear plate located at the rear of the cylindrical portion. The cylindrical portion of the first tub 21 and the cylindrical portion of the second tub 22 are combined to constitute the tub 20.

The cabinet 10 includes frames, the frames of which are the front and rear frames forming the front and rear of the cabinet 10, and the front and rear frames connecting the front and rear frames, respectively, and the side and bottom surfaces of the cabinet 10 and It consists of a frame.

In the front frame of the cabinet 10, an inlet is formed so as to inject laundry into the drum 30. The inlet is opened and closed by a door 2 installed on the front frame of the cabinet 10.

A spring 19 for supporting the tub 20 from the upper side may be provided between the tub 20 and the cabinet 10. The spring 19 serves to mitigate vibrations and noises caused by the flow of the tub 20 due to the elastic force.

A second water supply pipe 13 for supplying washing water to the tub 20 is installed on the upper portion of the tub 20. The first water supply pipe 15 is connected to one side of the drying duct 40, which will be described later. One side of the second water supply pipe 13 is connected to an external water supply source (not shown), and the other side of the second water supply pipe 13 is connected to a detergent supply device 12. In addition, an inlet (not shown) for supplying condensate to the tub 20 is provided on the upper side of the tub 20. In addition, a valve (not shown) for adjusting the supply of condensate may be provided at the injection port (not shown). An injection port (not shown) may be provided in the cylindrical portion of the second tub 22. This is because the drying device is provided at the rear inside the cabinet 10.

The detergent supply device 12 is connected to the tub 20 through a connection pipe 16. Water supplied through the second water supply pipe 13 is supplied to the interior of the tub 20 together with the detergent via the detergent supply device 12. According to an embodiment of the present invention, the detergent supply device 12 may be connected to the first tub 21 through the connection pipe 16. This is because the detergent supply device 12 is located in front of the inside of the cabinet 10.

The tub 20 is supported by a damper 6. The damper 6 connects the inner bottom surface of the cabinet 10 and the outer surface of the tub 20. In addition, the damper 6 may be positioned on the upper and left and right sides in addition to the inner bottom surface of the cabinet 10 to support the tub 20. The damper 6 or the spring 19 can mitigate vibrations and shocks generated from the vertical flow of the tub 20 at the top and bottom of the tub 20.

A driving shaft 11 for transmitting power of the motor 7 is connected to the rear surface of the drum 30. A plurality of through holes 18 for the distribution of washing water are formed around the drum 30. A plurality of lifters 17 are installed on the inner circumferential surface of the drum 30 so that when the drum 30 rotates, the laundry can be raised and dropped.

The drive shaft 11 is disposed between the drum 30 and the motor 7. One end of the drive shaft 11 is connected to the rear plate of the drum 30, and the other end of the drive shaft 11 extends outside the rear wall of the tub 20. When the motor 7 drives the drive shaft 11, the drum 30 connected to the drive shaft 11 rotates around the drive shaft 11.

A bearing housing 8 is installed on the rear plate of the second tub 22 to rotatably support the drive shaft 11. The bearing housing 8 may be made of an aluminum alloy, and may be inserted into the rear wall of the second tub 22 when injection molding the second tub 22. Between the bearing housing 8 and the drive shaft 11, the bearings 9 are installed so that the drive shaft 11 can rotate smoothly.

In the lower portion of the tub 20, the drain pump 4 for discharging the water inside the tub 20 to the outside of the cabinet 10, and the water inside the tub 20 so that the water can flow into the drain pump 4 A connection hose 3 connecting the tub 20 and the drain pump 4 and a drain hose 5 for guiding the water pumped by the drain pump 4 to the outside of the cabinet 10 are provided.

The condensed water is supplied to the tub 20 through an injection port (not shown). It may be supplied to the tub 20 by a nozzle (not shown) through an injection port (not shown). The condensed water supplied to the tub 20 flows along the inner rear surface of the tub 20 and is then discharged to the outside through the drain pump 4 and the drain hose 5 under the tub 20.

The tub 20 is equipped with a drying device 40 for drying the air inside the tub 20 and then supplying it to the interior of the tub 20 again. The drying device 40 serves to remove moisture from the air condensed inside the tub 20.

The drying device 40 may be combined with the second tub 22. A connection member 50 may be provided between the second tub 22 and the drying device 40 to mediate the coupling between one end of the drying device 40 and one end of the second tub 22. That is, the connecting member 50 may be located between the tub 20 and one end of the drying device 40 through which air flows from the tub 20 to the drying device 40.

Between the drying device 40 and the tub 20, an air blowing fan for forming a circulation flow of air so that the air of the tub 20 flows into the drying device 40 and flows into the interior of the tub 20 again. 44) is located. In the drying device 40, a heater 60 for heating air therein is built-in. Between the drying device 40 and the tub 20, a connecting member 50 for mediating the coupling of the one end of the drying device 40 and the tub 20 may be provided.

A seating portion 45 on which the blower fan 44 is seated may be located under the drying device 40. A support portion 45a for fixing the drying device 40 to the seating portion 45 may be provided on one side of the seating portion 45. A fastening member may be coupled to one side of the support portion 45a and one side of the drying apparatus 40 to couple the drying apparatus 40 and the support portion 45a.

The communication hole 42a extending from one side of the drying device 40 is engaged with the front panel 21a extending from one side of the first tub 21. Accordingly, air circulates between the tub 20 and the drying device 40.

3 is a view showing a drying apparatus according to an embodiment of the present invention, Figure 4 is a view showing a cross-section of a drying apparatus according to an embodiment of the present invention.

3 and 4, the drying device 40 includes an upper plate 41 and a lower plate 42. A heater 60 is provided inside the drying device 40. The upper plate 41 and the lower plate 42 of the drying device 40 are provided with seating holes 41c and 42c, respectively, to seat the blowing fan 44.

In addition, a seating portion 45 having a recessed inside may be provided to seat the blowing fan 44. The seating portion 45 is coupled to the lower side of the lower plate 42. That is, it may be located between the connecting member 50 and the lower plate 42. On one side of the seating portion 45, a blower fan 44 and a water supply pipe connecting portion 46 for spraying washing water to the drying device 40 are located. The water supply pipe connection part 46 may be provided to protrude from the seating part 45. The upper cover 43 is coupled to the upper portion of the upper plate 41 so that the blowing fan 44 does not protrude to the outside.

A heater 60 is located inside the drying device 40, and a fixing unit 70 for fixing the heater 60 may be coupled to the drying device 40.

The heater 70 is formed with a predetermined diameter and length. The heater 70 can be made in a zigzag manner. The heater 70 includes a terminal portion to which electric wires through which electric current flows are connected, a sealing member mounted to be spaced apart from the terminal portion to prevent air leakage, and a heating portion extending from the terminal portion. The heating unit is formed by bending a plurality of times with a predetermined diameter and length.

In order to fix the heater 60 in the drying device 40, the fixing unit 70 is coupled to the outside of the upper plate 41 and the lower plate 42. A portion of the terminal portion is located outside the upper plate 41 and the lower plate 42 and the sealing member is located behind the upper plate 41 and the lower plate 42. On the outside of the drying device 40, the fixing unit 70 is coupled to be fitted to the terminal portion.

The fixing unit 70 may be used as an insulating material. That is, a conductor cannot be used to prevent heat from being transferred to the fixing unit 70 and overheated. A material having high heat resistance may be used to withstand the heat generated in the heater 60. According to an embodiment of the present invention, polyphenylene sulfide (PPS) and polyethylene terephtalate (PET) satisfying the above conditions may be used as the fixing unit 70.

According to an embodiment of the present invention, since the heater 60 is fixed from the outside of the drying device 40, when the lint flows into the inside of the drying device 40, the lint accumulates and is lint by the heat of the heater 60. Accidents caused by fire can be prevented.

5 is a view showing a seating portion according to an embodiment of the present invention.

As illustrated in FIG. 5, one side of the seating portion 45 may be provided with a plurality of first lint collecting portions 47 for preventing lint from flowing into the blowing fan 44. The first lint collecting portion 47 may be provided to extend in the direction of the tub 20 from the seating portion 45. That is, the first lint collecting portion 47 may be provided in the vertical direction.

The length of each of the plurality of first lint collecting parts 47 may be different. A first lint collection unit located in the center of the plurality of first lint collection units 47 is defined as a first center lint collection unit 48, and a first lint collection unit located outside the first center lint collection unit 48. The part is defined as the first outer lining collecting part 49. The length of the first center lint collecting portion 48 may be longer than the length of the first outer lint collecting portion 49. This is to efficiently collect the lint because the tendency of the lint to flow into the center of the drying device 40 by the blowing fan 44 is large.

The first lint collecting portion 47 may be provided to have a narrower width as it extends from the seating portion 45. That is, the first lint collecting portion 47 may be provided in a wedge shape. Since the end of the first lint collecting portion 47 is provided with a narrow width, it is possible to guide the lint to be collected.

According to an embodiment of the present invention, since the first lint collecting portion 47 is located in the seating portion 45 where the blowing fan 44 is located, the lint flowing in the direction of the blowing fan 44 is the first lint collecting portion. It is possible to prevent the lint from flowing into the blower fan 44 by being caught by (47).

6 is a view showing a seating portion according to another embodiment of the present invention.

6, the first lint collecting portion 147 may be provided in various shapes. As illustrated in FIG. 5, the first lint collecting portion 147 may be provided to extend from the outer side of the seating portion 145 toward the center of the seating portion 145. In this case, since the first lint collecting portion 147 is located in the horizontal direction, the area occupied by the first lint collecting portion 147 in the seating portion 145 is larger, so the lint flowing into the blowing fan 144 is further added. It is possible to capture efficiently.

7 is a view showing a drying apparatus according to another embodiment of the present invention, Figure 8 is a view showing a seating portion according to another embodiment of the present invention, Figure 9 is another embodiment of the present invention It is a view showing the air flow of the drum washing machine according to.

One embodiment of the present invention shown in FIGS. 7 to 9 differs from the embodiments of the present invention shown in FIGS. 2 to 6 in the form of the seating portion 245. Since the same reference numerals as the previous drawings correspond to the same components, descriptions thereof will be omitted.

A communication unit 250 may be provided on at least one surface of the seating unit 245 according to an embodiment of the present invention. The communicating portion 250 may be formed by a concave surface 251 in which at least a portion of the seating portion 245 is concavely recessed to the lower side of the seating portion 245. In the drawing, it is illustrated that one communication unit 250 is provided, but it is not limited thereto, and a plurality of communication units may be provided. In addition, the communication unit 250 may be provided to have various sols, such as slits and holes.

Due to the operation of the blowing fan 144 inside the seating portion 245, air outside the tub 20 may flow into the seating portion 245 through the communication portion 250.

Hereinafter, the air flow of the drum washing machine according to an embodiment of the present invention will be described with reference to FIG. 9.

The laundry is dried by air circulating inside the tub 20 while rotating inside the drum 30 (see FIG. 1). The hot and humid air absorbing moisture contained in the laundry inside the drum 30 (see FIG. 1) flows into the drying device 40 through the seating portion 245 through the connecting member 50.

Due to the operation of the blowing fan 144 of the seating portion 245, the dry air outside the tub 20 flows into the seating portion 245 through the communication portion 250.

The high temperature and high humidity air may be condensed by heat exchange by condensate, but it is also possible to condense by heat exchange by dry air flowing from outside the tub 20. Accordingly, when the communication unit 250 is provided in the seating portion 245, drying by condensation water and condensation by dry air may occur, thereby increasing condensation efficiency.

The air condensed by the condensed water or dry air is heated by a heater 60 (see FIG. 2) inside the drying device 40 while passing through the drying device 40. The heated air is introduced into the tub 20 through the communication hole 42a of the drying device 40 and the front panel 21a extending from one side of the first tub 21, and is introduced into the drum 30 (see FIG. 1). The laundry is dried by absorbing moisture contained in the laundry. By repeating this process repeatedly, the moisture contained in the laundry is removed to dry the laundry.

10 is a view showing a connecting member according to an embodiment of the present invention, Figure 11 is a view showing a state in which the lint is collected in the second lint collecting part of the connecting member according to an embodiment of the present invention, 12 is a view showing a state in which the second lint collecting portion of the connecting member according to an embodiment of the present invention is washed off by the water supply.

10 to 12, a plurality of second lint collecting portions 55 protruding in the center direction of the connecting member 50 may be provided inside the connecting member 50 to collect the lint. . According to an embodiment of the present invention, the second lint collecting part 55 may be injection molded integrally with the connecting member 50.

The connecting member 50 may include a drying device coupling part 53 coupled to the drying device 40 and a tub coupling part 51 coupled to the tub 20. Between the drying device coupling portion 53 and the tub coupling portion 51 may include a corrugated portion 54 for absorbing vibration and shock generated in the tub 20 and the drying device 40. The corrugated portion 54 is alternately arranged with a mountain shape 54a protruding outward and a recessed curved shape 54b. Due to the corrugation portion 54, since the connection member 50 can flow to a certain extent, it is possible to absorb vibrations generated in the tub 20 and the drying device 40.

A bending part 52 provided to be bent in the direction of the tub 20 may be provided between the drying device coupling part 53 and the tub coupling part 51. The bent portion 52 is for easily coupling the connecting member 50 to the tub 20. Since the hole 24 to which the connecting member 50 is coupled due to the bent portion 52 does not need to be positioned in the vertical direction with respect to the drying device 40, it is not only flexible in design but also easy to assemble.

The connecting member 50 is made of a flexible material. This is to efficiently absorb vibration and noise energy generated in the tub 20 and the drying device 40 through flexible shape deformation of the connecting member 50. The connecting member 50 is a plastic material having high vibration and noise insulation properties such as TPE (Thermoplastic elastomer), TPO (Thermoplastic olefin elastomer), TPU (Thermoplastic polyurethane), TPAE (Thermoplastic polyamide), TPEE (Thermoplastic polyester elastomer), or the like. , EPDM (Ethylene propylene dieneM-class), etc. can be composed of injection molding of rubber material.

The second lint collecting part 55 may be integrally injection molded with the connecting member 50 or may be provided with the same material. Therefore, the second lint collecting portion 55 is also made of a flexible material. When the washing water is supplied to the inside of the drying device 40, each second lint collecting part 55 is bent in the direction of gravity through which the washing water flows. In this case, as shown in Figure 12, the lint (L) wound on the second lint collecting part 55 is washed down by washing water.

13 is a view showing a connecting member according to another embodiment of the present invention.

13, according to an embodiment of the present invention, the connecting member 150 may be provided as a separate member from the second lint collecting unit 155. In this case, the second lint collecting portion 155 is a coupling portion 156 coupled to the inner side of the connecting member 150, and extending from the coupling portion 156, the circumferential direction of the inner wall of the second lint collecting portion 155 It is located as, it may be composed of a projection 157 that is provided to protrude to the center of the connecting member 150.

14 is a view showing a water supply structure of a drying apparatus according to an embodiment of the present invention.

The detergent supply device 12 is connected to the tub 20 (refer to FIG. 1) through a connection pipe (refer to FIG. 1). Water supplied through the second water supply pipe 13 is supplied to the interior of the tub 20 (see FIG. 1) together with the detergent through the detergent supply device 12. The second water supply pipe 13 may be connected to the second water supply switch valve 14 to control the water supply. Washing water is supplied to the inside of the drying device 40 through the water supply pipe connection 46 provided on one side of the drying device 40. As the washing water is injected into the drying device 40, the lint collected in the first lint collecting part 47 inside the drying device 40 or the second lint collecting part 55 inside the connecting member 50 is washed out. You can. A support panel 21 for support may be located on the upper side of the cabinet 20.

According to an embodiment of the present invention, the first water supply pipe 15 coupled to the water supply pipe connection 46 of the drying device 40 to supply the washing water is branched from the second water supply pipe 13 connected to the detergent supply device 12 Can be. In this case, when the washing water is supplied to the drum 35 through the tub 20, the washing water is also supplied to the drying device 40. Therefore, since the lint inside the drying apparatus 40 is washed out from time to time, it is possible to prevent the accumulation of the lint and deterioration of the performance of the drum washing machine 1.

15 is a view showing a water supply structure of a drying apparatus according to another embodiment of the present invention, Figure 16 is a flow chart showing the operation of the drum washing machine according to another embodiment of the present invention.

As shown in FIG. 15, according to an embodiment of the present invention, the first water supply pipe 115 coupled to the water supply pipe connection 46 of the drying apparatus 40 may be coupled to a separate external water supply source (not shown). have. In addition, the first water supply opening and closing valve 116 for adjusting the amount of washing water supplied to the first water supply pipe 115 may be combined. In this case, there is an advantage in that the amount of washing water and the timing of water supply to the drying device 40 can be adjusted separately from the washing water supplied to the drum 30. This will be described later.

Briefly explaining the washing, rinsing, dehydration, drying, and cooling processes of the drum washing machine in which the first water supply pipe shown in FIG. 16 is coupled to a separate external water supply source (not shown) and can control the washing water flowing into the drying duct is as follows. Same as

When the washing process is started after the laundry is introduced into the drum, the washing water supplied through the water supply pipe passes through the detergent supply device and is supplied to the tub and the drum together with the detergent (S300).

When the supply of the washing water is completed, washing is performed while the drum is rotated by a motor installed on the outer rear surface of the tub to rotate the drum (S300).

When the washing process 3200 ends, the washing water is supplied to the tub to start the rinsing process (S310). After the rinsing process (S310) ends, a dehydration process is performed (S320).

After the dehydration process (S320) is completed, a drying process is performed (S330).

It is determined whether the drying period S330 is started and the remaining time t1 until the end of the drying stroke is less than the set time T1 (S340). If the remaining time t1 until the end of the drying process is less than the set time T1, the cooling process starts (S350). The cooling stroke is a stroke that turns off the heater and periodically turns on and off the blower fan. This is to prevent the user from being exposed to the high temperature air emitted from the door when the door is opened after the drying process of the drum washing machine is finished. The cooling stroke may start when the time t1 remaining until the end of the drying stroke is approximately 5 to 10 minutes.

The blower fan can be turned on after being turned off for at least 5 seconds. This is to ensure that the fan is completely off. According to an embodiment of the present invention, during the cooling stroke, the blower fan may be set to be on for 20 seconds and off for 10 seconds.

When the cooling stroke is started (S350), a spraying stroke for spraying washing water from the first water supply pipe into the drying duct proceeds (S360). The spraying stroke may be performed for at least one of a drying stroke and a cooling stroke.

Since the injection stroke proceeds, it is possible to prevent the lint from accumulating in the drying duct. Particularly, when the injection stroke is performed during the cooling stroke, the blower fan is periodically turned off, so that the lint can be prevented from entering the drying duct from the tub and getting caught in the blower fan. In addition, since the injection stroke proceeds, the lint in the drying duct can be washed away.

17 is a flow chart showing the operation of the drum washing machine according to another embodiment of the present invention.

As illustrated in FIG. 17, the spraying stroke may be performed after the dehydrating stroke is performed (S430). In this case, since the injection stroke is performed (S430) and the drying stroke is started (S440), the accumulation of lint generated in the dehydration stroke process can be prevented.

In addition, a cooling stroke in which the heater is turned off and the blower fan is periodically turned on / off is started (S460), and an injection stroke is separately performed (S470). Therefore, since the lint accumulated in the drying duct during the drying stroke is washed with the spraying stroke S470 during the cooling stroke, the possibility of the lint accumulating in the drying duct is reduced.

In the above, specific examples have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the invention pertains may perform various modifications without departing from the gist of the technical spirit of the invention described in the claims below. .

1: drum washing machine 15, 115: first water supply pipe
20: tub 40: drying device
45, 145 , 245: seating part 46, 146: water supply pipe connection
47, 147: first lint collecting part 50, 150: connecting member
54, 154: wrinkles 55, 155: second lint collection
250: communication department

Claims (20)

cabinet;
A tub disposed inside the cabinet;
A drum rotatably disposed inside the tub;
A drying device for drying the laundry in the drum;
A seating portion in which a blower fan for circulating air is located;
A plurality of first lint collecting parts provided to protrude from the outer circumferential surface of the seating part and preventing lint from flowing into the blowing fan;
A connecting member that mediates coupling between one side of the drying device and one side of the tub; And
A plurality of second lint collecting parts provided inside the connecting member to collect lint;
Including,
The first lint collecting portion is formed toward the center of the seating portion from the inner surface of the seating portion, and is formed to be narrow in width along the extending direction,
The second lint collecting portion protrudes from the inner surface of the connecting member along the circumferential direction of the connecting member toward the center of the connecting member, characterized in that it is formed to be narrower in width along the extending direction. Drum washing machine. delete delete According to claim 1,
The drum washing machine, characterized in that the length of each of the first lint collecting portion is provided to be different. According to claim 4,
A drum washing machine characterized in that the length of the first center lint collecting portion located at the center of the first lint collecting portion is longer than the length of the first outer lint collecting portion located at both outer sides. delete delete delete delete According to claim 1,
The drum washing machine, characterized in that the second lint collecting portion is made of a flexible material. According to claim 1,
A drum washing machine, characterized in that at least one communicating portion is provided on at least one surface of the seating portion so that dry air outside the tub can be introduced. The method of claim 11,
The drum washing machine, characterized in that the communication portion is formed by a concave surface at least partially concave in the seating portion. cabinet;
A tub disposed inside the cabinet;
A drum rotatably disposed inside the tub;
A drying apparatus including a seating portion in which a blowing fan circulating air to perform drying of laundry in the drum is located inside;
A connecting member that mediates the combination of the drying device and the tub; And
It is provided integrally with at least one of the drying device and the connecting member, and is for preventing lint from entering the blowing fan, wherein the first lining collecting part provided inside the drying device and the connecting member A lint collecting unit including a second lint collecting unit provided inside;
It includes,
The first lint collecting portion is formed toward the center of the seating portion from the inner surface of the seating portion, and is formed to be narrow in width along the extending direction,
The second lint collecting portion protrudes from the inner surface of the connecting member along the circumferential direction toward the center of the connecting member, characterized in that it is formed to be narrower in width along the extending direction. Drum washing machine. delete delete delete delete cabinet;
A tub disposed inside the cabinet;
A drum rotatably disposed inside the tub;
A drying device for drying the laundry in the drum;
A seating portion in which a blower fan for circulating air is located;
At least one communication unit that is located on one side of the seating portion, the dry air outside the tub is introduced by the blowing fan;
A connecting member that mediates the combination of the drying device and the tub; And
It is provided integrally with at least one of the drying device and the connecting member, and is for preventing lint from entering the blowing fan, wherein the first lining collecting part provided inside the drying device and the connecting member A lint collecting unit including a second lint collecting unit provided inside;
It includes,
The first lint collecting portion is formed toward the center of the seating portion from the inner surface of the seating portion, and is formed to be narrow in width along the extending direction,
The second lint collecting portion protrudes from the inner surface of the connecting member along the circumferential direction toward the center of the connecting member, characterized in that it is formed to be narrower in width along the extending direction. Drum washing machine. The method of claim 18,
The drum washing machine, characterized in that the communication portion is formed by a concave surface at least partially concave in the seating portion. delete

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