TWI844705B - Washing Machine - Google Patents

Abstract

The drum washing machine disclosed in the present invention comprises: a water tank elastically supported in the washing machine housing; a rotary drum rotatably arranged in the water tank; a water supply valve, which is a water supply device for supplying water to the water tank; a motor, which drives the rotary drum to rotate; and a drainage path, which discharges the water in the water tank. In addition, it comprises: a drainage pump, which is arranged in the middle of the drainage path, sucks water and drains it; a filter, which is arranged in the drainage path and captures foreign matter; and a control device, which sequentially controls each process such as washing, rinsing, and dehydration. In addition, the control device drives the drainage pump intermittently during the drainage action performed by the drainage pump. In this way, the clumps of lint and other debris caught by the filter are crushed by the water flow generated by the intermittent operation of the drain pump and discharged through the drainage path.

Description

Washing Machine

This disclosure relates to a washing machine.

Japanese Patent Publication No. 2016-146984 has proposed a washing machine that uses a drainage filter to capture lint and the like.

The washing machine comprises: a water tank elastically supported in the main body; a containing tank rotatably arranged in the water tank; a water supply mechanism 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. In addition, the washing machine comprises: a drainage pump arranged in the middle of the drainage path to suck water and drain it; a filter housing arranged in the drainage path and equipped with a drainage filter for catching foreign matter; and a circulation pump arranged in the circulation path passing through the filter housing to circulate the washing water. In addition, the drainage filter filters the washing water that circulates in the circulation path driven by the circulation pump and captures the lint etc. contained in the washing water.

However, conventional washing machines have the risk of poor drainage due to lint clogging the drain filter. In addition, in order to prevent the drain filter from clogging, users must frequently maintain the drain filter.

The present disclosure provides a washing machine that reduces the user's cleaning effort by crushing the dust captured by the filter.

The washing machine disclosed in the present invention is equipped with: a water tank, which is elastically supported in the body; a rotating drum, which is rotatably arranged in the water tank; a water supply mechanism, which supplies water to the rotating drum or the water tank; a motor, which drives the rotating drum to rotate; and a drainage path, which allows the water in the water tank to be discharged. In addition, it is equipped with: a drainage pump, which is arranged in the drainage path, sucks water and drains it; a filter, which is arranged in the drainage path and captures foreign matter; and a control unit, which sequentially controls the washing operation including the washing stroke, the rinsing stroke, and the dehydration stroke. In addition, the control unit drives the drainage pump intermittently during the drainage action performed by the drainage pump.

The washing machine disclosed in this disclosure reduces the user's cleaning effort by crushing the dust captured by the filter.

41: Washing machine housing

42: Sink

43: Rotating drum

44: Rotation axis

45: Motor

46: Belt

47: protruding plate

48: Water hole

49: Sink unit

50: Shell opening

51: Anti-vibration damper

52: Cover

53: Clothing entrance and exit

54: Water supply path

55: Drainage path

56: Water circulation path

57: Water supply valve

60: Water supply hose

61: Detergent storage area

62: Water injection hose

63: Drainage pump

64: Drain pipe

65:Filter

65a: Filter section

65b: Impact part

65c: Support part

65d: Grip

66: Drain hose

67: Circulation pump

68: Inflow side path

69: Exhalation side path

70: Heater for drying

71: Air supply fan

72: Catheter

73: Warm wind circulation path

74: Drying filter

75: Air pipe

76: Water level detection mechanism

77: Spraying device

78: Silk scraps

78a: Finely scattered silk scraps

79: Operation display unit

80: Spray outlet

81: Control device

82: Filter outline

82a: Inlet

82b: Outflow port

95: Drainage outlet

a~c:arrow

S1~S21: Steps

Figure 1 is an exploded perspective view of the washing machine in the first embodiment.

Figure 2 is a longitudinal cross-sectional view of the washing machine in the first embodiment.

FIG. 3A is a schematic diagram showing the state of the drying filter in the drying path of the washing machine in the first embodiment where the lint is accumulated.

FIG. 3B is a schematic diagram showing a state where the lint accumulated in the drying filter of the drying path of the washing machine in the first embodiment has been washed away.

FIG. 4A is a three-dimensional diagram of the main parts around the filter of the washing machine in the first embodiment.

FIG. 4B is a three-dimensional view of the main parts of the washing machine in the first embodiment with the filter removed from around the filter.

FIG. 5A is a schematic diagram showing the flow of water during circulation in the filter of the washing machine in the first embodiment.

FIG. 5B is a schematic diagram showing the flow of water during drainage in the filter of the washing machine in the first embodiment.

Figure 6 is a flow chart of the operation of the washing machine in the first embodiment.

The form used to implement the invention

Below, the implementation form is described in detail with reference to the drawings. In addition, the present invention is not limited by the attached drawings and the following description.

(First implementation form)

Below, Figures 1 to 4A and 4B are used to illustrate the first implementation form.

(Structure of washing machine)

FIG. 1 is an exploded perspective view of the washing machine in the first embodiment. FIG. 2 is a longitudinal cross-sectional view of the washing machine in the first embodiment. FIG. 3A is a schematic diagram showing the state in which lint is accumulated in the drying filter of the drying path of the washing machine in the first embodiment. FIG. 3B is a schematic diagram showing the state in which the lint accumulated in the drying filter of the drying path of the washing machine in the first embodiment has been washed away.

The washing machine in this embodiment is described using a drum-type washing machine.

In Figures 1 and 2, a water tank unit 49 is provided inside the washing machine housing 41. The water tank unit 49 has a water tank 42, a rotating drum 43, and a motor 45.

The water tank 42 is movably arranged inside the washing machine housing 41, and a rotating drum 43 is rotatably arranged inside the water tank 42. The rotating drum 43 is formed in a bottomed cylindrical shape, and the front side is opened as a clothing inlet and outlet 53.

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

Several protrusions 47 are provided on the inner wall of the rotating drum 43 for stirring the laundry. In addition, in order to allow water to pass through the inside and outside of the rotating drum 43, a plurality of water holes 48 are provided on the outer wall of the rotating drum 43.

The water tank 42 is supported against vibration by a plurality of vibration dampers 51 mounted on the lower part of the washing machine housing 41, and is supported against vibration by a plurality of spring bodies (not shown) between the upper part of the washing machine housing 41 and the water tank 42 so as to be able to swing freely.

The washing machine housing 41 is provided with a housing opening 50, which is formed at a position opposite to the clothing inlet and outlet 53 of the rotary drum 43. The cover 52 is provided to cover the housing opening 50 in a freely openable and closable manner. By opening the cover 52, laundry can be taken out and put into the rotary drum 43 through the clothing inlet and outlet 53.

A control device 81 is provided in the upper part of the washing machine housing 41. The control device 81 is composed of a microcomputer or the like. The control device 81 controls the motor 45, the water supply mechanism, i.e., the water supply valve 57, the drainage pump 63, and the circulation pump 67, etc., according to the mode setting or the control program, and sequentially controls the washing operation including the washing process, the rinsing process, the dehydration process, and the drying process for drying the clothes.

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

The water supply path 54 is composed of a water supply hose 60, a detergent storage part 61, and a water injection hose 62.

The water supply hose 60 is connected to a water supply device, namely a water supply valve 57.

The detergent storage part 61 stores the drawer part (not shown) for storing detergent or soft care agent so that it can be pulled out from the outside. By opening the water supply valve 57, the washing water will flow into the water supply hose 60. The washing water flowing into the water supply hose 60 will be supplied to the water tank 42 through the detergent storage part 61 and the water injection hose 62.

The drainage path 55 is composed of a drainage pipe 64, a filter outer shell 82, a drainage pump 63, and a drainage hose 66.

The drain pipe 64 is connected to the drain port 95 provided at the bottom of the water tank 42 and the inlet port 82a provided at the filter outer shell 82. The filter 65 is accommodated inside the filter outer shell 82. The details of the filter 65 and the inside of the filter outer shell 82 will be described later.

The drain pump 63 is disposed between the filter outer shell 82 and the drain hose 66. The drain hose 66 is connected to the outflow port 82b provided on the filter outer shell 82, and extends from the inside of the washing machine housing 41 to the top of the outside of the washing machine housing 41. By driving the drain pump 63, the washing water in the water tank 42 will pass through the drain pipe 64, the filter outer shell 82, the drain pump 63, and the drain hose 66 in sequence and be drained to the outside.

The water circulation path 56 is composed of a drain pipe 64, a filter outer shell 82, an inflow side path 68, a circulation pump 67, a discharge side path 69, and a spray port 80.

The inflow side path 68 is a path connecting the filter outer shell 82 and the circulation pump 67. The discharge side path 69 is a path connecting the circulation pump 67 and the spray port 80. The spray port 80 is provided at the front part of the water tank 42 so that the washing water passing through the discharge side path 69 is sprayed into the rotary drum 43. By driving the circulation pump 67, the washing water in the water tank 42 passes through the drain pipe 64, the inlet 82a, the filter outer shell 82, the filter part 65a described later, the inlet side path 68, the circulation pump 67, the discharge side path 69, and the spray port 80 in sequence, and is discharged into the rotary drum 43 as circulating water. By circulating the washing water in this way, the detergent can be dissolved quickly, thereby improving the washing or rinsing ability of the drum washing machine.

There are multiple spray outlets 80 arranged in a circumferential direction of the rotating drum 43, and each of the multiple spray outlets 80 sprays circulating water toward the clothes in the rotating drum 43.

An air trap (not shown) is formed on the side wall behind the bottom of the water tank 42. The air trap is connected to the air pipe 75. The air pipe 75 is connected to the water level detection mechanism 76 disposed at the upper part of the washing machine housing 41, and the water level detection mechanism 76 is composed of, for example, a pressure sensor. The water level detection mechanism 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 washing machine in this embodiment, i.e., the drum-type washing machine shown in FIG1, is equipped with a drying function. The air heated by the drying heater 70 is sent from the water tank 42 to the rotary drum 43 through the duct 72 by the air supply fan 71. In addition, the rotary drum 43 rotates left and right at a low speed, while sucking the air containing moisture from the back of the water tank 42 and dehumidifying the moisture in the air. Then, the above-mentioned action is circulated and heated again by the drying heater and sent from the water tank 42 to the rotary drum 43 by the air supply fan. Through this action, the clothes are dried.

As shown in FIG. 3A and FIG. 3B, a drying filter 74 is provided on the warm air circulation path 73 to capture lint 78 generated by drying; and a spray device 77 is provided to wash away the lint 78 accumulated in the drying filter 74. As described later, the spray device 77 is operated during the water supply in the flushing process, and will wash away the lint (FIG. 3A) accumulated in the drying filter during the previous drying operation (FIG. 3B). Therefore, the washing machine in this embodiment does not require the user to maintain the drying filter.

(Structure around the filter)

FIG. 4A is a three-dimensional view of the main parts around the filter of the washing machine in the first embodiment. FIG. 4B is a three-dimensional view of the main parts around the filter of the washing machine in the first embodiment with the filter removed. FIG. 5A is a schematic diagram showing the flow of water during circulation in the filter of the washing machine in the first embodiment.

FIG. 5B is a schematic diagram showing the flow of water during drainage in the filter of the washing machine in the first embodiment.

In addition, in FIG. 4A, FIG. 4B, FIG. 5A, and FIG. 5B, the connected hose is omitted. The filter 65 is mainly composed of a filter portion 65a, a collision portion 65b, a support portion 65c, and a grip portion 65d. The filter 65 inhibits foreign matter from being attracted to the drain pump 63 and the circulation pump 67.

The grip portion 65d is arranged to be the front side of the drum washing machine. The grip portion 65d is arranged to allow the user to install and remove the filter 65 to the filter outer shell 82 while holding the grip portion 65d.

The supporting portion 65c is formed to extend from the gripping portion 65d and supports the filter portion 65a and the impact portion 65b.

The filter portion 65a is disposed at a position closer to the drain pump 63 than the inflow side path 68, and is formed in a substantially disc shape so as to plug the inside of the filter outer shell 82. The filter portion 65a is formed in a mesh shape and captures the lint 78 and the like contained in the washing water circulating in the water circulation path 56.

The impact part 65b is disposed at a position closer to the drain pump 63 than the filter part 65a and is formed in a substantially disc shape. The impact part 65b inhibits foreign matter larger than the lint 78 from being attracted to the drain pump 63. Moreover, as described later, the impact part 65b also has the function of dispersing the lint 78 flowing from the filter part 65a.

Regarding the drum washing machine constructed as above, the following describes its actions and functions.

(Washing operation)

Figure 6 is a flow chart of the operation of the washing machine in the first embodiment.

The following is an example of washing operation. After the user opens the cover 52 and puts the laundry into the rotary drum 43, and turns on the power switch (not shown), the washing operation will start by operating the start switch (not shown) of the input setting mechanism (not shown) provided on the operation display unit 79.

When the washing operation starts, the washing process will begin (step S1). Then, the water supply valve 57 opens and supplies water to the water tank 42 (step S2).

After the water tank 42 is supplied with water to a predetermined water level, the rotary drum 43 rotates left and right to perform cleaning and agitation (step S3). During the cleaning and agitation, the circulation pump 67 is driven, and the washing water circulates in the water circulation path 56. The washing water flows as shown by arrow a in Figure 5A, and the filter part 65a filters the washing water flowing in from the inlet 82a and captures the lint 78 contained in the washing water. The captured lint 78 gathers on the drainage pump 63 side of the filter part 65a and accumulates into lumps. When the predetermined time of cleaning and agitation is completed, it is transferred to the flushing process (step S4).

During the flushing process, drainage, intermediate dehydration, and flushing agitation are performed. First, the drain pump 63 is driven to allow the washing water to flow as shown by arrow b in Figure 5B to perform the drainage action (step S5). In step S5, the drain pump 63 is intermittently driven to repeat the driving and stopping at a predetermined time cycle.

By intermittent driving, as shown by arrow c in FIG. 5B , a water flow is generated in the long side direction of the filter outer shell 82 in the suction direction and the opposite direction of the drain pump 63. By this water flow, the shavings 78 accumulated in the filter part 65a will fall off the filter part 65a and float in the water. The shavings 78 that fall off the filter part 65a will be attracted to the side of the drain pump 63 by the driving of the drain pump 63 and hit the impact part 65b. The shavings 78a that are finely scattered due to the impact of the collision will be discharged to the outside of the machine together with the water at the time when the drain pump 63 is driven.

Intermittent driving can also be performed by repeating, for example, driving for about 2 seconds and stopping for about 1 second. In this way, a sufficient number of collisions required to break up the clumps of shavings can be obtained until the drainage is completed. In addition, by making the driving time longer than the stopping time, the drainage speed can be prevented from slowing down due to intermittent driving.

When the water level detection mechanism 76 detects that the water level has dropped to the reset water level (first predetermined water level) (step S6, yes), the drainage pump 63 stops intermittent driving and performs continuous driving (step S7). The so-called reset water level is the water level at which the clothes in the rotary drum 43 are not soaked by water. The reset water level in this embodiment is set below the lower end of the rotary drum 43. The finely scattered shavings 78a remaining in the filter outer shell 82 in a finely scattered state will be uniformly discharged during the continuous driving.

In step S7, the control device 81 performs a saturation determination (not shown) to determine whether drainage has been completed. The saturation determination is, for example, to detect the water level every few seconds by the water level detection mechanism 76, and when the displacement of the detected water level becomes less than a predetermined value, it is determined that drainage has been completed. In the saturation determination, if intermittent driving is performed, there is a risk that the water level will fluctuate up and down with the intermittent driving. By driving the drainage pump 63 continuously, it is possible to accurately determine whether the displacement of the water level is less than a predetermined value, thereby suppressing erroneous detection in the saturation determination.

When it is determined that the drainage is complete, the cloth will be rubbed and stirred to allow the dehydration to start smoothly (step S8).

During the cloth rubbing and loosening agitation, the rotary drum 43 rotates left and right for a predetermined time of about 50r/min to adjust the deviation of the clothes in the rotary drum 43. The drainage pump 63 is intermittently driven during the cloth rubbing and loosening agitation to suppress cavitation. In addition, during the intermittent driving during the cloth rubbing and loosening agitation, the clumps of silk scraps accumulated in the filter part 65a will also be dispersed and discharged outside the washing machine housing 41.

After the predetermined time of rubbing, loosening and stirring the cloth is completed, intermediate dehydration will begin (step S9). When the dehydration rotation number reaches 100r/min (step S10, yes), the drainage pump 63 will become continuously driven. If the dehydration rotation number exceeds 100r/min, the drainage volume will increase rapidly, so the drainage can be efficiently carried out by continuously driving the drainage pump 63. After the dehydration rotation number exceeds 100r/min, the rotation number will be increased and the intermediate dehydration will continue (step S11).

When the intermediate dehydration is completed, water supply begins (step S12). At this time, the shavings 78 and the like accumulated in the drying filter 74 during the previous drying operation are washed away to the water tank 42 or the drainage path 55 by the spray device 77. The washed shavings 78 and the like will remain in the water tank 42 or the drainage path 55 until the next time the drainage pump 63 is driven (step S15).

When the preset water level is reached, the rinsing and stirring process will start (step S13). During the rinsing and stirring process, the circulation pump 67 is driven while the rotary drum 43 is rotated left and right to stir the clothes. When the preset rinsing and stirring time is completed, the process will be transferred to the final dehydration process (step S14).

In the final dehydration process, the drain pump 63 is driven to drain water (step S15), and the drain pump 63 is intermittently driven to repeatedly drive and stop at a predetermined time cycle. Similar to the drainage action in the flushing process, the clumps of lint accumulated in the filter part 65a will also be dispersed and discharged to the outside of the machine through intermittent driving. The lint 78 washed away from the drying filter 74 will also be discharged to the outside of the washing machine housing 41 in the same way.

After drainage is completed and the water level drops to the reset water level (step S16), the drainage pump 63 will change from intermittent driving to continuous driving (step S17).

When the drainage is completed, the cloth rubbing and stirring will be performed (step S18). During the cloth rubbing and stirring, the drainage pump 63 will be driven intermittently to suppress cavitation. When the predetermined time of cloth rubbing and stirring is completed, dehydration will begin (step S19). When the dehydration rotation number reaches about 100r/min (step S20, yes), the drainage pump 63 will become continuously driven. After the dehydration rotation number exceeds 100r/min, the rotation number will be increased while continuing to dehydrate (step S21). When the predetermined time of dehydration is completed, the washing operation is completed.

(Function)

As described above, the washing machine in this embodiment is equipped with: a water tank 42, which is elastically supported in the washing machine housing 41; a rotary drum 43, which is rotatably arranged in the water tank 42; a water supply mechanism, i.e., a water supply valve 57, which supplies water to the rotary drum 43 or the water tank 42; a motor 45, which drives the rotary drum 43 to rotate; and a drainage path 55, which discharges the water in the water tank 42. In addition, it is equipped with: a drainage pump 63, which is arranged in the middle of the drainage path 55, sucks water and drains it; a filter 65, which is arranged in the drainage path 55 and captures foreign matter; and a control device 81, which sequentially controls each process such as washing, rinsing, and dehydration. In addition, the control device 81 drives the drain pump 63 intermittently during the drainage operation performed by the drain pump 63.

With this structure, the clumps of shavings 78 and the like captured by the filter 65 are crushed into very small pieces by the water flow generated by the intermittent operation of the drain pump 63, and discharged through the drainage path 55. Therefore, poor drainage caused by clogging of the filter 65 can be suppressed, and the user's labor of cleaning the filter 65 can be reduced.

In addition, as in the present embodiment, the filter 65 may also include: a filter portion 65a for capturing foreign matter; and a collision portion 65b, which is disposed at a position closer to the drain pump 63 than the filter portion 65a.

Thus, the clumps of shavings 78 and the like captured by the filter portion 65a will collide with the collision portion 65b due to the water flow generated when the drainage pump 63 is driven, and will be crushed into very small pieces. Therefore, poor drainage caused by clogging of the filter 65 can be suppressed, and the user's labor of cleaning the filter 65 can be reduced.

In addition, as in the present embodiment, there are: a water circulation path 56 connected to the drainage path 55 to circulate the water in the water tank 42; and a circulation pump 67, which is arranged in the water circulation path 56 to circulate the water, and the filter 65 is arranged at a position where the water circulation path 56 and the drainage path 55 overlap, that is, the filter outer shell 82.

With this structure, the filter 65 can capture the lint 78 contained in the circulating water passing through the water circulation path 56. Therefore, in the washing process and the rinsing process, the lint contained in the washing water can be removed, and the washing operation can be prevented from being terminated in a state where the lint 78 is attached to the clothes.

In addition, as in the present embodiment, a water level detection mechanism 76 may be provided to detect the water level in the water tank 42, and a control device 81 may continuously drive the drainage pump 63 when the water level detected by the water level detection mechanism 76 is below the resetting water level of the rotary drum 43 during the drainage operation performed by the drainage pump 63.

With this configuration, when it is determined that drainage from the water tank 42 has been completed, the drainage pump 63 is continuously driven, thereby suppressing the ups and downs of the water level. Therefore, when it is determined that drainage from the water tank 42 has been completed, it is possible to suppress the occurrence of false detection.

In addition, as in the present embodiment, during the drainage operation performed by the drainage pump 63, the control device 81 can start the rotation drive of the rotary drum 43 after continuously driving the drainage pump 63 below the reset water level, and intermittently drive the drainage pump 63 when the rotation speed of the rotary drum 43 is less than 100 r/min, and continuously drive the drainage pump 63 when the rotation speed of the rotary drum 43 is above 100 r/min.

This structure can prevent cavitation during low-speed rotation when the water contained in the laundry is removed by centrifugal force, and can efficiently drain water in the rotation area where the drainage volume increases rapidly.

(Other implementation forms)

As described above, the first embodiment is described as an example of the technology disclosed in this disclosure. However, the technology disclosed in this disclosure is not limited thereto.

Therefore, other implementation forms are exemplified below.

In the first embodiment, a drum-type washing machine is described as an example of a washing machine. Since any washing machine can be equipped with a drainage pump and a filter, it is not limited to a drum-type washing machine. The washing machine may also be a vertical washing machine or a two-tank washing machine, etc.

In the first embodiment, as an example of a filter, a filter 65 including a substantially disc-shaped filter portion 65a and a collision portion 65b is described. Any filter can be any filter as long as it includes: a filter portion for capturing foreign matter, and a collision portion provided at a position closer to the drain pump 63 than the filter portion. Therefore, the filter portion and the collision portion are not limited to being substantially disc-shaped. In addition, the filter 65 is not limited to a structure in which the filter portion 65a and the collision portion 65b are supported by the support portion 65c, and may also be substantially box-shaped or the like. However, the structure in which the filter part 65a and the impact part 65b are supported by the support part 65c can easily remove the accumulated lint, so the cleaning performance is excellent.

Furthermore, in the first embodiment, a washing machine with a drying function is described as an example of a washing machine. A washing machine may not have a drying function. However, a washing machine with a drying function will generate a large amount of lint during the drying operation, so the lint is easily retained in the rotating drum 43. The remaining lint will be captured by the filter disposed at a position where the circulation path and the drainage path overlap during the washing operation after the drying operation. Therefore, the present disclosure is suitable for use in a washing machine with a drying function. In addition, a washing machine with a spray device will flush the lint captured by the drying filter into the drainage path, so there is a risk that a large amount of lint will remain in the sink or the drainage path. Therefore, the present disclosure is also suitable for use in washing machines equipped with a spray device.

As described above, the present disclosure can be applied to a washing machine equipped with a drainage pump and a filter. Specifically, the present disclosure can be applied to a vertical washing machine, a drum washing machine, a two-tank washing machine, etc.

41: Washing machine housing

42: Sink

43: Rotating drum

47: protruding plate

48: Water hole

49: Sink unit

51: Anti-vibration damper

53: Clothing entrance and exit

54: Water supply path

55: Drainage path

56: Water circulation path

57: Water supply valve

60: Water supply hose

61: Detergent storage area

62: Water injection hose

63: Drain pump

64: Drain pipe

66: Drain hose

67: Circulation pump

68: Inflow side path

69: Exhalation side path

70: Heater for drying

71: Air supply fan

72: Catheter

73: Warm wind circulation path

74: Drying filter

77: Spraying device

80: Spray outlet

82: Filter outline

82a: Inlet

82b: Outflow port

Claims (6)

A washing machine comprises: a water tank, which is elastically supported in a main body and has a drain port; a rotary drum, which is rotatably arranged in the water tank; a water supply device, which supplies water to the rotary drum or the water tank; a motor, which drives the rotary drum to rotate; a drainage path, which discharges the water in the water tank; a circulation path, which is connected to the drainage path and circulates the water in the water tank; a circulation pump, which is arranged in the circulation path and circulates the water; and a drainage pump, which is arranged in the middle of the drainage path and sucks water and performs Drainage; a filter, disposed in the aforementioned drainage path, and including a filter portion for capturing foreign matter; a filter outer shell, accommodating the aforementioned filter, and having an inlet connected to the aforementioned drainage port; and a control portion, sequentially controlling the washing operation including a cleaning stroke, a flushing stroke, and a dehydration stroke, and the aforementioned control portion drives the aforementioned drainage pump intermittently during the drainage operation performed by the aforementioned drainage pump, and the aforementioned filter portion is disposed between the aforementioned inlet and the aforementioned circulation pump, and is not disposed between the aforementioned inlet and the aforementioned drainage pump. As in claim 1, the washing machine, wherein the filter comprises: an impact portion, disposed at a position closer to the drain pump than the filter portion. As in claim 1, the washing machine, wherein: the filter is arranged at a position where the circulation path and the drainage path overlap. As in claim 2, the washing machine, wherein: the filter is arranged at a position where the circulation path and the drainage path overlap. A washing machine as claimed in any one of claims 1 to 4, comprising: a water level detection unit for detecting the water level in the water tank, and the control unit for continuously driving the drainage pump when the water level detected by the water level detection unit is below the rotary drum, i.e., below the first predetermined water level, during the drainage operation performed by the drainage pump. A washing machine as claimed in claim 5, wherein the control unit starts the rotation driving of the rotary drum after continuously driving the drain pump, and drives the drain pump intermittently when the rotation speed of the rotary drum is less than 100 r/min, and drives the drain pump continuously when the rotation speed of the rotary drum is greater than 100 r/min.