CN114258440A

CN114258440A - Washing machine

Info

Publication number: CN114258440A
Application number: CN202080057551.5A
Authority: CN
Inventors: 河本裕美子; 芳贺秀夫
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2019-08-30
Filing date: 2020-07-08
Publication date: 2022-03-29
Anticipated expiration: 2040-07-08
Also published as: TW202108845A; JP7470895B2; JP2021035406A; WO2021039136A1

Abstract

The drum type washing machine of the present disclosure includes: a water tank (42) elastically supported in the washing machine casing (41); a rotary drum (43) rotatably provided in the water tank (42); a water supply valve (57) as a water supply device for supplying water into the water tank (42); a motor for driving the rotary drum (43) to rotate; and a drainage path (55) for draining the water in the water tank (42). Further, the drum type washing machine includes: a drain pump (63) which is provided in the middle of the drain path (55) and sucks and discharges water; a filter which is provided in the drainage path (55) and captures foreign matter; and a control unit for sequentially controlling the steps of washing, rinsing, and dewatering. In addition, the control device drives the drain pump (63) intermittently during a draining operation performed by the drain pump (63). As a result, the cake such as the filament waste captured by the filter is crushed by the water flow generated in association with the intermittence of the drain pump (63), and is discharged through the drain path (55).

Description

Washing machine

Technical Field

The present disclosure relates to a washing machine.

Background

Conventionally, a washing machine has been proposed which captures lint and the like by using a drain filter.

The washing machine includes: a water tank elastically supported in the main body; a holding tank rotatably provided in the water tank; a water supply device for supplying water to the water tank; a motor for driving the washing tank to rotate; and a drainage path for draining the water in the water tank. Further, the washing machine includes: a drain pump provided in the middle of the drain path and sucking/discharging water; a filter housing provided in the drain path, the filter housing having a drain filter disposed therein for capturing foreign matter; and a circulation pump provided in a circulation path passing through the filter housing and circulating the washing water. The drain filter filters the washing water circulating through the circulation path by driving the circulation pump, and captures the silk waste and the like contained in the washing water (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-146984

Disclosure of Invention

However, in the conventional washing machine, there is a possibility that the drainage filter is clogged with the lint and the like, thereby causing poor drainage. In addition, in order to prevent clogging of the drain filter, a user needs to frequently clean the drain filter.

The present disclosure provides a washing machine which reduces the burden of cleaning for a user by crushing dust captured by a filter.

The washing machine of the present disclosure includes: a water tank elastically supported in the main body; a rotary drum rotatably provided in the water tank; a water supply device for supplying water to the rotary drum or the water tank; a motor for driving the rotary drum to rotate; and a drainage path for draining the water in the water tank. Further, the washing machine includes: a drain pump provided in the middle of the drain path and sucking/discharging water; a filter provided in the drainage path and capturing foreign matter; and a control unit for sequentially controlling a washing operation including a cleaning step, a rinsing step, and a dewatering step. The control unit intermittently drives the drain pump during a draining operation performed by the drain pump.

The washing machine reduces the burden of cleaning for a user by crushing dust captured by a filter.

Drawings

Fig. 1 is an exploded perspective view of a washing machine according to embodiment 1.

Fig. 2 is a longitudinal sectional view of the washing machine of embodiment 1.

Fig. 3A is a schematic view showing a state in which silk waste is accumulated in the drying filter in the drying path of the washing machine according to embodiment 1.

Fig. 3B is a schematic view showing a state where the filament waste accumulated in the drying filter of the drying path of the washing machine of embodiment 1 is washed.

Fig. 4A is a perspective view of a main portion around a filter of the washing machine according to embodiment 1.

Fig. 4B is a perspective view of a main portion of the washing machine according to embodiment 1, with the filter removed, around the filter.

Fig. 5A is a schematic diagram showing the flow of water during circulation in the filter of the washing machine according to embodiment 1.

Fig. 5B is a schematic diagram showing the flow of water during draining in the filter of the washing machine according to embodiment 1.

Fig. 6 is an operation flowchart of the washing machine according to embodiment 1.

Detailed Description

Hereinafter, embodiments will be described in detail with reference to the drawings. The present invention is not limited to the drawings and the following description.

(embodiment 1)

Hereinafter, embodiment 1 will be described with reference to fig. 1 to 4A and 4B.

(Structure of washing machine)

Fig. 1 is an exploded perspective view of a washing machine according to embodiment 1. Fig. 2 is a longitudinal sectional view of the washing machine of embodiment 1. Fig. 3A is a schematic view showing a state in which silk waste is accumulated in the drying filter in the drying path of the washing machine according to embodiment 1. Fig. 3B is a schematic view showing a state where the filament waste accumulated in the drying filter of the drying path of the washing machine of embodiment 1 is washed.

The description of the washing machine of the present embodiment is made with reference to a drum-type washing machine.

In fig. 1 and 2, a water tank unit 49 is provided inside the washing machine casing 41. The water tank unit 49 includes a water tank 42, a rotary drum 43, and a motor 45.

Water tub 42 is disposed in washing machine casing 41 so as to be swingable, and rotary drum 43 is disposed in water tub 42 so as to be rotatable. The rotary drum 43 is formed in a bottomed cylindrical shape, and the front side thereof is opened as a laundry entrance 53.

A rotation shaft (rotation center shaft) 44 extending in the horizontal direction is provided at the rotation center portion of the rotary drum 43, and a motor 45 disposed near the back side of the water tank 42 is connected to the rotation shaft 44 via a belt 46. The rotary drum 43 is driven by the motor 45 to rotate in the normal rotation direction or the reverse rotation direction.

A plurality of projection plates 47 for agitating the laundry are provided on the inner wall surface of the rotary drum 43. Further, a plurality of water passage holes 48 are provided in the outer peripheral wall of the rotary drum 43 so that water passes through the rotary drum 43.

The water tub 42 is supported by a plurality of vibration dampers 51 attached to a lower portion of the washing machine casing 41 in a vibration-proof manner, and the water tub 42 is supported by a plurality of spring bodies (not shown) between an upper portion of the washing machine casing 41 and the water tub 42 in a vibration-proof manner so as to be swingable.

A casing opening 50 is formed in the washing machine casing 41 at a position facing the laundry inlet/outlet 53 of the rotary drum 43. The cover 52 is provided to openably and closably cover the case opening 50. By opening the lid 52, laundry can be taken in and out of the rotary drum 43 through the laundry entrance 53.

A control device 81 is provided at an upper portion in the washing machine casing 41. The control device 81 is constituted by a microcomputer or the like. The controller 81 controls the motor 45, the water supply valve 57 as a water supply device, the drain pump 63, the circulation pump 67, and the like according to the mode setting and the control program, and sequentially controls a washing operation including a washing step, a rinsing step, and a dehydrating step, and a drying step of drying the laundry.

Inside the washing machine casing 41 are provided: a water supply path 54 for supplying washing water (e.g., tap water) into the water tank 42; a drain path 55 for draining the washing water in the water tank 42 to the outside of the washing machine case 41; and a water circulation path 56 for circulating the washing water in the water tank 42.

The water supply path 54 includes a water supply hose 60, a detergent storage part 61, and a water filling hose 62.

A water supply valve 57 as a water supply means is connected to the water supply hose 60.

The detergent storage section 61 stores a drawer (not shown) that stores detergent and softener so that the drawer can be pulled out from the outside. By opening the water supply valve 57, the washing water flows into the water supply hose 60. The washing water flowing into the water supply hose 60 is supplied into the water tank 42 through the detergent storage section 61 and the water supply hose 62.

The drain path 55 includes a drain pipe 64, a filter outline 82, a drain pump 63, and a drain hose 66.

The drain pipe 64 connects a drain port 95 provided in the bottom of the water tank 42 and an inlet 82a provided in the filter contour 82. The filter 65 is housed inside the filter outline portion 82. The details of the filter 65 and the interior of the filter outline portion 82 will be described later.

The drain pump 63 is disposed between the filter outline portion 82 and the drain hose 66. The drain hose 66 is connected to an outlet 82b provided in the filter contour 82, and extends from the inside of the washing machine case 41 to the outside and above the washing machine case 41. The washing water in the tub 42 is discharged to the outside by the driving of the drain pump 63 through the drain pipe 64, the filter outline part 82, the drain pump 63, and the drain hose 66 in this order.

The water circulation path 56 includes a drain pipe 64, a filter outline portion 82, an inflow side path 68, a circulation pump 67, a discharge side path 69, and a discharge port 80.

The inflow path 68 is a path connecting the filter outline portion 82 and the circulation pump 67. Discharge-side path 69 is a path connecting circulation pump 67 and discharge port 80. The discharge port 80 is provided in the front portion of the water tank 42 to discharge the washing water passing through the discharge-side path 69 into the rotary drum 43. The washing water in the water tank 42 is driven by the circulation pump 67, passes through the drain pipe 64, the inlet 82a, the filter contour 82, the filter unit 65a described later, the inlet-side passage 68, the circulation pump 67, the discharge-side passage 69, and the discharge port 80 in this order, and is discharged as circulating water into the rotary drum 43. By circulating the washing water in this manner, the detergent can be dissolved quickly, and thus the washing and rinsing performance of the drum-type washing machine is improved.

A plurality of discharge ports 80 are provided in a circumferential direction of the rotary drum 43, and the plurality of discharge ports 80 discharge circulating water to the laundry in the rotary drum 43.

An air trap (not shown) is formed on a side wall behind the bottom of the water tank 42. The air trap is connected to an air pipe 75. The air pipe 75 is connected to a water level detection device 76 provided in an upper portion of the washing machine casing 41, and the water level detection device 76 is constituted by a pressure sensor or the like, for example. The water level detection device 76 detects the water level of the washing water in the water tank 42 based on the water pressure of the washing water in the water tank 42, that is, the pressure in the corresponding air trap.

The drum-type washing machine shown in fig. 1, which is a washing machine of the present embodiment, is equipped with a drying function, and air heated by a drying heater 70 is sent from a water tank 42 into a rotary drum 43 through an air duct 72 by a blower fan 71. Further, such a cycle is performed: the rotary drum 43 rotates left and right at a low speed, sucks air containing moisture from the rear of the water tank 42, dehumidifies the moisture in the air, heats the air again by the drying heater, and sends the air from the water tank 42 into the rotary drum 43 by the blower fan. According to this operation, the laundry is dried.

As shown in fig. 3A and 3B, the warm air circulation path 73 is provided with a dry filter 74 for collecting the silk waste 78 generated by drying and a shower device 77 for washing the silk waste 78 accumulated on the dry filter 74. As described later, the shower device 77 is executed during water supply in the rinsing step, and washes the filament waste (fig. 3A) accumulated in the drying filter in the previous drying operation (fig. 3B). Thus, with the washing machine of the present embodiment, the user may not clean the drying filter.

(Structure around Filter)

Fig. 4A is a perspective view of a main portion around a filter of the washing machine of embodiment 1. Fig. 4B is a perspective view of a main portion of the washing machine according to embodiment 1, with the filter removed, around the filter. Fig. 5A is a schematic diagram showing the flow of water during circulation in the filter of the washing machine according to embodiment 1.

Fig. 5B is a schematic diagram showing the flow of water during draining in the filter of the washing machine according to embodiment 1. In fig. 4A, 4B, 5A, and 5B, the hose to be connected is omitted. The filter 65 mainly includes a filter portion 65a, a collision portion 65b, a support portion 65c, and a grip portion 65 d. The filter 65 suppresses foreign matters from being sucked to the drain pump 63 and the circulation pump 67.

The grip 65d is set to be the front side of the drum-type washing machine. The grip portion 65d is provided for the user to attach and detach the filter 65 to and from the filter contour portion 82 while gripping the grip portion 65 d.

The support portion 65c is formed to extend from the grip portion 65d and support the filter portion 65a and the collision portion 65 b.

The filter unit 65a is provided at a position closer to the drain pump 63 than the inflow path 68, and is formed in a substantially disk shape so as to close the inside of the filter contour 82. The filter unit 65a is formed in a mesh shape, and traps the silk waste 78 and the like contained in the washing water circulating in the water circulation path 56.

The collision portion 65b is provided at a position closer to the drain pump 63 than the filter portion 65a, and is formed in a substantially disk shape. The collision portion 65b suppresses foreign matter larger than the chips 78 from being sucked to the drain pump 63. The collision portion 65b also has a function of crushing the chips 78 flowing from the filter portion 65a as described later.

The operation and action of the drum-type washing machine configured as described above will be described below.

(washing operation)

Hereinafter, the washing operation will be described as an example. The user opens the lid 52 to put laundry into the rotary drum 43, turns on a power switch (not shown), and then operates a start switch (not shown) of an input setting device (not shown) provided in the operation display portion 79 to start the washing operation.

When the washing operation is started, the washing process is started (step S1). Subsequently, the water supply valve 57 is opened to supply water to the water tank 42 (step S2).

When water is supplied to the water tank 42 to a predetermined water level, the rotary drum 43 rotates left and right to perform washing and agitation (step S3). During the washing agitation, the circulation pump 67 is driven to circulate the washing water through the water circulation path 56. The washing water flows as indicated by arrow a in fig. 5A, and the filter unit 65A filters the washing water flowing in from the inlet 82a to capture the silk waste 78 contained in the washing water. The collected filament waste 78 is collected on the drain pump 63 side of the filter unit 65a and accumulated in a lump. When the washing agitation for the predetermined time is completed, the process proceeds to the rinsing step (step S4).

In the rinsing step, water drainage, intermediate dehydration, and rinsing agitation are performed. First, drain pump 63 is driven, and the washing water flows as indicated by arrow B in fig. 5B, and performs a drain operation (step S5). The drain pump 63 performs intermittent driving of repeating driving and stopping at a cycle of a predetermined time in step S5.

By the intermittent drive, as shown by arrow c in fig. 5B, a water flow is generated in the longitudinal direction in the filter contour part 82 in the suction direction of the drain pump 63 and in the direction opposite to the suction direction. The water flow causes the filament waste 78 accumulated in the filter unit 65a to be separated from the filter unit 65a and to float in the water. The chips 78 separated from the filter unit 65a are sucked toward the drain pump 63 by the driving of the drain pump 63, and collide with the collision unit 65 b. The fine chips 78a broken by the impact of the collision are discharged out of the apparatus together with the water at the time of driving of the drain pump 63.

The intermittent driving may be performed, for example, in such a manner that driving for about 2 seconds and stopping for about 1 second are repeated. Thus, a sufficient number of collisions can be obtained to break the filament chip pieces into smaller pieces until the end of the water discharge. Further, by making the driving time longer than the stopping time, the water discharge speed can be suppressed from slowing down due to intermittent driving.

When water level detection device 76 detects that the water level has fallen to the reset water level (yes at step S6), drain pump 63 stops intermittent driving and continues driving (step S7). The reset water level is a water level at which the laundry in the rotary drum 43 is not immersed in water, and the reset water level in the present embodiment is provided below the lower end of the rotary drum 43. The finely crushed filament waste 78a remaining in the filter contour 82 in a finely crushed state is collectively discharged by continuous driving.

In step S7, the control device 81 performs a saturation determination, and determines whether or not the drainage has ended (not shown). For the saturation determination, the water level is detected every few seconds by the water level detection device 76, for example, and it is determined that the drainage has ended when the detected displacement of the water level becomes a predetermined value or less. When the intermittent drive is performed in the saturation determination, the water level may fluctuate in accordance with the intermittent drive. By continuously driving drain pump 63, it is possible to accurately determine whether or not the displacement of the water level is equal to or less than a predetermined value, and therefore, erroneous detection in the saturation determination can be suppressed.

When it is determined that the drainage has ended, the anti-tangling agitation is performed to smoothly perform the dehydration start (step S8).

In the anti-tangling agitation, the rotary drum 43 is rotated left and right at about 50r/min for a predetermined time to settle the offset of the laundry in the rotary drum 43. The drain pump 63 is intermittently driven during the anti-tangling agitation to suppress the air entrainment. In the intermittent drive of the anti-tangling agitation, the pieces of the filament waste accumulated in the filter portion 65a are also broken and discharged to the outside of the washing machine casing 41.

When the antiwind agitation for the predetermined time is finished, the intermediate dehydration is started (step S9). When the dewatering rotation speed reaches 100r/min (step S10, yes), the drain pump 63 is continuously driven. Since the amount of water discharged increases rapidly when the dehydration rotation speed exceeds 100r/min, water can be discharged more efficiently by continuously driving the drain pump 63. After the spin-drying rotation speed exceeds 100r/min, the intermediate spin-drying is continued while increasing the rotation speed (step S11).

When the intermediate dehydration is ended, the water supply is started (step S12). At this time, the chips 78 and the like accumulated in the drying filter 74 in the previous drying operation are washed to the water tank 42 or the drain path 55 by the shower device 77. The silk waste 78 and the like after the washing remain in the water tank 42 or the drain path 55 until the next driving of the drain pump 63 (step S15).

When the predetermined water level is reached, the rinsing agitation is started (step S13). In the rinsing agitation, the circulation pump 67 is driven, and the rotary drum 43 rotates left and right to agitate the laundry. When the rinsing agitation for the predetermined time is completed, the process proceeds to the final spin-drying process (step S14).

In the final dehydration step, the drain pump 63 is driven to perform drainage (step S15), and the drain pump 63 performs intermittent driving in which driving and stopping are repeated at a predetermined time period. Similarly to the water discharge operation in the rinsing step, the cake of the filament waste accumulated in the filter portion 65a is crushed by the intermittent driving and discharged to the outside of the apparatus. The filament waste 78 and the like flushed from the drying filter 74 are similarly discharged to the outside of the washing machine casing 41.

When the water level drops to the reset water level as the drainage is performed (step S16), the drain pump 63 is changed from the intermittent drive to the continuous drive (step S17).

When the drainage is finished, the anti-tangling agitation is performed (step S18). In the anti-tangling agitation, the drain pump 63 is intermittently driven, suppressing the air entrainment phenomenon. When the antiwind agitation for the predetermined time is finished, the dehydration is started (step S19). When the dewatering rotation speed becomes about 100r/min (yes in step S20), drain pump 63 is continuously driven. After the spin-drying rotation speed exceeds 100r/min, the spin-drying is continued while increasing the rotation speed (step S21). When the dehydration for a predetermined time is finished, the washing operation is finished.

(action)

As described above, the washing machine of the present embodiment includes: a water tank 42 elastically supported in the washing machine case 41; a rotary drum 43 rotatably provided in the water tank 42; a water supply valve 57 as a water supply means for supplying water to the rotary drum 43 or the water tank 42; a motor 45 for driving the rotary drum 43 to rotate; and a drain path 55 for draining the water in the water tank 42. Further, the washing machine includes: a drain pump 63 provided in the middle of the drain path 55 and configured to suck and discharge water; a filter 65 provided in the drain path 55 to capture foreign matter; and a control device 81 for sequentially controlling the respective steps of washing, rinsing, and dewatering. During the draining operation by the drain pump 63, the controller 81 intermittently drives the drain pump 63.

With this configuration, the cake such as the filament waste 78 captured by the filter 65 is finely crushed by the water flow generated in association with the intermittence of the drain pump 63, and is discharged through the drain path 55. This can suppress poor drainage due to clogging of the filter 65, and reduce the burden on the user to clean the filter 65.

As in the present embodiment, the filter 65 may include a filter unit 65a for capturing foreign matter and a collision unit 65b provided at a position closer to the drain pump 63 than the filter unit 65 a.

As a result, the lumps such as the chips 78 captured by the filter unit 65a are collided with the collision unit 65b by the water flow generated when the drain pump 63 is driven, and are finely pulverized. This can suppress poor drainage due to clogging of the filter 65, and reduce the burden on the user to clean the filter 65.

As in the present embodiment, the washing machine may further include: a water circulation path 56 which communicates with the drain path 55 and circulates water in the water tank 42; and a circulation pump 67 provided in the water circulation path 56 for circulating water, and in the washing machine, the filter 65 is provided in the filter outline portion 82 at a position where the water circulation path 56 overlaps the drain path 55.

With this configuration, the filter 65 can capture the filament waste 78 contained in the circulating water passing through the water circulation path 56. Accordingly, the silk waste contained in the washing water can be removed in the washing step and the rinsing step, and the washing operation can be terminated with the silk waste 78 prevented from adhering to the laundry.

As in the present embodiment, the washing machine may include a water level detection device 76 that detects the water level in the water tank 42, and the controller 81 may continuously drive the drain pump 63 when the water level detected by the water level detection device 76 is equal to or lower than the return water level below the rotary drum 43 during the draining operation by the drain pump 63.

According to this configuration, when it is determined that the water discharge from the water tank 42 has ended, the drain pump 63 is continuously driven, and therefore, the water level can be suppressed from fluctuating. This can suppress the occurrence of false detection when it is determined that the drainage from the water tank 42 has ended.

As in the present embodiment, when the water level is reset or lower during the draining operation by the drain pump 63, the controller 81 may continuously drive the drain pump 63, then start driving the rotary drum 43 to rotate, intermittently drive the drain pump 63 when the rotation speed of the rotary drum 43 is less than 100r/min, and continuously drive the drain pump 63 when the rotation speed of the rotary drum 43 is 100r/min or more.

According to this configuration, when the moisture contained in the laundry is removed by the centrifugal force, air entrainment can be prevented during low-speed rotation, and water can be efficiently discharged during the rotation period in which the water discharge amount is rapidly increased.

(Another embodiment)

As described above, embodiment 1 has been described as an example of the technique of the present disclosure. However, the technology of the present disclosure is not limited thereto.

Therefore, in the following, other embodiments are exemplified.

In embodiment 1, a drum-type washing machine is described as an example of a washing machine. The washing machine is not limited to a drum type washing machine as long as it includes a drain pump and a filter. The washing machine may also be a vertical type washing machine or a double-tub type washing machine.

In embodiment 1, a filter 65 including a substantially disk-shaped filter portion 65a and a collision portion 65b is described as an example of the filter. The filter may include a filter unit for trapping foreign matter and a collision unit provided at a position closer to drain pump 63 than the filter unit. Therefore, the filter portion and the collision portion are not limited to the substantially disk shape. The filter 65 is not limited to the structure in which the filter portion 65a and the collision portion 65b are supported by the support portion 65c, and may be substantially box-shaped. However, the structure in which the filter portion 65a and the collision portion 65b are supported by the support portion 65c is excellent in cleaning performance because accumulated yarn waste and the like are easily removed.

In embodiment 1, a washing machine having a drying function is described as an example of the washing machine. The washing machine may not have a drying function. Among them, the washing machine having the drying function generates a large amount of silk waste during the drying operation, and therefore the silk waste is likely to remain in the rotary drum 43. The remaining filament waste is caught by a filter provided at a position where the circulation path overlaps the drain path in the washing operation after the drying operation. Thus, a washing machine having a drying function is suitable for use with the present disclosure. In addition, in the washing machine including the shower device, the silk waste or the like captured by the drying filter is washed into the drain passage, and therefore, there is a possibility that a large amount of silk waste remains in the water tank or the drain passage. Thus, washing machines including a shower arrangement are also suitable for use with the present disclosure.

Industrial applicability

The present disclosure can be applied to a washing machine including a drain pump and a filter. Specifically, the present disclosure can be applied to a vertical type washing machine, a drum type washing machine, a dual-tub type washing machine, and the like.

Description of the reference numerals

41. A washing machine housing; 42. a water tank; 43. rotating the drum; 44. a rotating shaft; 45. a motor; 46. a belt; 47. a protrusion plate; 48. a water through hole; 49. a water tank unit; 50. a housing opening part; 51. a vibration-proof damper; 52. a cover body; 53. a clothes inlet and outlet; 54. a water supply path; 55. a drainage path; 56. a water circulation path; 57. a water supply valve (water supply device); 60. a water supply hose; 61. a detergent storage part; 62. a water injection hose; 63. draining pump; 64. a drain pipe; 65. a filter; 65a, a filter part; 65b, a collision part; 65c, a support portion; 65d, a holding part; 66. a drain hose; 67. a circulation pump; 68. an inflow-side path; 69. a discharge side path; 70. a heater for drying; 71. an air supply fan; 72. an air duct; 73. a warm air circulation path; 74. drying the filter; 75. an air tube; 76. a water level detection device; 77. a spraying device; 78. silk waste; 78a, crushing to obtain fine silk shreds; 79. an operation display unit; 80. an ejection port; 81. a control device (control unit); 82. a filter profile; 82a, an inflow port; 82b, an outflow port.

Claims

1. A washing machine, wherein,

the washing machine includes:

a water tank elastically supported in the main body;

a rotary drum rotatably provided in the water tank;

a water supply device supplying water to the rotary drum or the water tank;

a motor for driving the rotary drum to rotate;

a water discharge path that discharges water in the water tank;

a drain pump provided in the middle of the drain path and configured to suck and discharge water;

a filter provided in the drainage path and configured to capture foreign matter; and

a control part for controlling the washing operation including the cleaning process, the rinsing process and the dewatering process in sequence,

the control unit intermittently drives the drain pump during a draining operation performed by the drain pump.

2. The washing machine according to claim 1, wherein,

the filter includes a filter unit for capturing foreign matter and a collision unit provided at a position closer to the drain pump than the filter unit.

3. The washing machine according to claim 1, wherein,

the washing machine includes:

a circulation path that communicates with the drain path and circulates water in the water tank; and

a circulation pump provided in the circulation path and circulating water,

the filter is provided at a position where the circulation path overlaps the drain path.

4. The washing machine according to claim 2, wherein,

the washing machine includes:

a circulation pump provided in the circulation path and circulating water,

5. The washing machine according to any one of claims 1 to 4,

the washing machine includes a water level detecting part for detecting a water level in the water tub,

in the draining operation by the drain pump, the control unit continuously drives the drain pump when the water level detected by the water level detecting unit is equal to or lower than a 1 st predetermined water level below the rotary drum.

6. The washing machine according to claim 5,

the control part starts to drive the rotary drum to rotate after the drain pump is continuously driven,

intermittently driving the drain pump in a case that a rotation speed of the rotary drum is less than 100r/min,

the drain pump is continuously driven when the rotation speed of the rotary drum is more than 100 r/min.