JP2023180279A - washing machine - Google Patents

Abstract

To provide a washing machine having an outer tank whose inner surface can be washed on a steady basis.SOLUTION: A washing machine includes an outer tank 6, a washing and dewatering tub 3 rotatably accommodated in the outer tank 6, a stirring blade rotatably supported on an inner bottom of the washing and dewatering tub 3, an outvane disposed on the underside of the stirring blade, a drive motor that rotatably drives the stirring blade and the washing and dewatering tub 3, and a circulation flow channel member 26 disposed on the inner surface of the washing and dewatering tub 3, the circulation flow channel member which raises washing water on the inner bottom of the washing and dewatering tub 3 with the rotation of the outvane so as to return the washing water into the washing and dewatering tub 3. The washing and dewatering tub 3 has a discharge hole 31s on the rear side of the circulation flow channel member 26, through which washing water is discharged toward an internal surface 6a of the outer tank 6 during the rotation of the outvane.SELECTED DRAWING: Figure 7

Description

The present invention relates to a washing machine.

Patent Document 1 describes a method for cleaning the inside of a washing tub (outer tub) containing a basket, in which a dedicated nozzle and a cleaning process are provided and cleaning water is sprayed onto the inner wall surface of the washing tub. There is.

Japanese Patent Application Publication No. 2016-105832

However, the washing machine described in Patent Document 1 requires a separate device for supplying washing water, and it is also necessary to set a course by arbitrary selection by the user.

The present invention solves the above-mentioned conventional problems and provides a washing machine that can constantly wash the inner surface of the outer tub.

The present invention provides an outer tank, a washing/dehydration tank rotatably housed in the outer tank, an agitation blade rotatably supported on an inner bottom of the washing/dehydration tank, and a lower surface of the agitation blade. a drive means for rotationally driving the agitating blade and the washing and dehydrating tank; and a driving means provided on the inner surface of the washing and dehydrating tank, and when the blade rotates, the washing and dehydrating tank rotates. a circulation flow path member that raises the washing water at the inner bottom and returns it to the washing/dehydration tank; A feature is that a discharge hole is formed to discharge washing water toward the inner wall surface of the outer tub.

According to the present invention, it is possible to provide a washing machine that can constantly wash the inner surface of the outer tub.

FIG. 1 is an internal configuration diagram of a washing machine according to the present embodiment. FIG. 2 is a perspective sectional view of a washing and dehydrating tank. FIG. 3 is a perspective view showing the back side of the stirring blade. It is a back view of a circulation channel member. It is a schematic diagram showing the position of the discharge hole of the washing and dehydrating tank. It is a schematic diagram showing the flow of circulating water. 7 is an enlarged view of part A in FIG. 6. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as "embodiments") will be described in detail with reference to the drawings as appropriate. In addition, in the following explanation, a washing machine that can perform washing, rinsing, and dehydration (so-called fully automatic washing machine) will be used as an example. It can also be applied to vertical washer/dryers).

FIG. 1 is an internal configuration diagram of a washing machine according to this embodiment.
As shown in FIG. 1, the washing machine 1 has an outer tub 6 made of synthetic resin in which a washing and dehydrating tub 3 is rotatably placed inside a substantially box-shaped outer frame 5 made of a steel plate by means of a vibration isolator 4. It has a suspended configuration. At the top of the outer frame 5, a synthetic resin top cover 9 is provided, which is equipped with a control unit 7 as a control means and an electromagnetic water supply valve 16 (water supply means) as a water supply means. It has a base member 10 made of synthetic resin.

The top cover 9 has a laundry inlet 9a in the center thereof for loading and unloading laundry 12, etc., and a lid 9b for opening and closing the laundry inlet 9a. In addition, the top cover 9 is provided with a power switch 13, an input switch section 14 for operating each process such as washing, a progress display section 14a for displaying the progress status of each process, etc. in front of the lid body 9b. There is. Further, a water supply hose 17 connected to a water faucet is provided on the rear outer side of the top cover 9, and the other end is connected to an electromagnetic water supply valve 16.

The outer frame 5 has a substantially cylindrical outer tank 6 with a bottom in which washing water is stored. The outer tank 6 is made of synthetic resin. When performing a washing process or the like, the electromagnetic water supply valve 16 is opened in response to a command from the control unit 7, and washing water is supplied into the outer tub 6. The water level sensor 15 detects that the water level has reached a predetermined level, and the electromagnetic water supply valve 16 is closed according to a command from the control unit 7 to stop water supply.

A drain valve 18 and a drain hose 11 serving as a drainage device are provided outside the bottom of the outer tank 6, and are connected to the drain hose 11 via the outer tank drain port 6c and the drain valve 18 provided at the bottom of the outer tank 6. When performing a dewatering process after a washing or rinsing operation, the drain valve 18 is opened by a command from the control unit 7, and the washing water in the outer tub 6 is drained from the other end of the drain hose 11 to the outside of the washing machine 1. do.

In addition, there is a gap between the inner periphery of the outer tub 6 and the outer periphery of the washing/dehydrating tub 3, and in order to prevent laundry etc. from entering this gap and to maintain the rigidity of the outer tub 6 as a whole, the outer tub 6 is A tub cover 20 formed in a ring shape is provided on the top surface to cover the top surface of a fluid balancer 32 provided in the washing/drying tub 3.

Further, a drive motor 22 and a deceleration mechanism 24 that decelerates the drive motor 22 are attached to the outside of the bottom of the outer tank 6 via an attachment base 21 made of a steel plate. An induction motor or a synchronous motor is used for the drive motor 22. The drive mechanism may be one in which a drive motor 22 drives the stirring blade 2 via a V-belt (not shown) and a speed reduction mechanism 24, and the drive shaft of the drive motor 22 is the same as the speed reduction mechanism 24. It may also be configured on an axis.

The deceleration mechanism 24 includes an electrically operated clutch mechanism 24a and a planetary gear deceleration mechanism 24b for switching between a washing operation and a dehydrating operation. The electrically operated clutch mechanism 24a rotates the stirring blades 2 left and right while the washing and dehydrating tank 3 is stationary (agitation mode), or rotates the washing and dehydrating tank 3 and the stirring blades 2 integrally in the same direction. (dehydration mode).

FIG. 2 is a perspective sectional view of the washing and dehydrating tub.
The washing and dehydrating tub 3 includes a body plate 31, a fluid balancer 32, and a bottom plate 33.

The body plate part 31 is formed of a stainless steel plate and has a substantially cylindrical shape, and has a dehydration hole in the peripheral wall for separating and discharging the washing water contained in the laundry 12 (see FIG. 1) by centrifugal force. 31a (see FIG. 1).

The fluid balancer 32 has a function of suppressing vibration of the outer tub 6 (see FIG. 1) due to the unevenness of the laundry 12 by moving a balancing fluid in the opposite direction to the unevenness of the laundry 12. It is provided on the upper edge of 31. Further, the fluid balancer 32 is disposed such that the circumferential surface on the inner diameter side protrudes more radially inward than the circumferential wall of the body plate portion 31 .

The bottom plate 33 has a disk-shaped bottom part 33a and a side part 33b rising upward from the peripheral edge of the bottom part 33a, and is fixed to the lower end of the body plate part 31. Further, the inner wall portion 33c at the boundary from the bottom portion 33a to the side portion 33b has an R shape (curved shape). Further, the bottom portion 33a is provided with a plurality of water intake ports 33a1 communicating with the outer tank 6.

Further, on the inner surface 3a of the washing and dehydrating tank 3, a circulation channel member 26 made of synthetic resin is provided. This circulation flow path member 26 is formed in a substantially plate shape, and is formed to extend from the bottom plate 33 to the upper end of the body plate portion 31. Furthermore, an opening 26a through which washing water is discharged is formed at the upper end of the circulation channel member 26. Further, a similar circulation passage member 26 is provided on the inner surface 3a of the washing and dehydrating tub 3 at a position facing the circulation passage member 26 (see FIG. 1).

Further, on the inner surface 3a of the washing and dehydrating tank 3, a flow path member 28 is provided which includes a filter member 28b for collecting lint and the like. An opening 28a is formed in the flow path member 28, and washing water is discharged from the opening 28a and returns into the washing/drying tub 3. Further, a similar flow path member 28 is provided on the inner surface 3a of the washing/dehydration tank 3 at a position facing the flow path member 28.

A rotatable stirring blade 2 is provided at the inner bottom of the washing and dehydrating tank 3 (on the inner peripheral side of the bottom plate 33). The agitating blades 2 have a large diameter that covers most of the bottom plate 33, are curved upward so that the peripheral edge looms upward, are shaped like a plate, and receive and support the laundry 12 (see FIG. 1). It is configured so that it rotates depending on the state.

The stirring blade 2 has a convex portion 2a (see FIG. 3) that is raised at the rotation center O and has a convex shape at opposing positions across the rotation center O, and a convex portion 2a between the convex portions 2a and 2a. It has recessed portions 2b, 2b (see FIG. 3) that are recessed in the circumferential direction, and is configured so that the uneven shape is repeated in the circumferential direction. Further, the stirring blade 2 is formed with a plurality of holes 2c (see FIG. 3) that communicate the front surface and the back surface.

FIG. 3 is a perspective view showing the back side of the rotary blade.
As shown in FIG. 3, back blades 2s (blade portions) extending radially from the rotation center O are formed on the back surface (lower surface) of the stirring blade 2. The back blades 2s are arranged at equal angles (in this embodiment, every 30 degrees) in the circumferential direction. Further, the back blade 2s at the highest position of the convex portion 2a is formed to have the highest height H in the vertical direction on the outer peripheral side. Further, the height of the convex portion 2a decreases as it moves away from the rear blade 2s at the highest position in the circumferential direction. Further, on the back surface of the stirring blade 2, a plurality of reinforcing plates 2t are provided concentrically or approximately concentrically with the rotation center O as a reference.

Furthermore, the rotation of the driving motor 22 (see FIG. 1) is decelerated by the planetary gear reduction mechanism 24b (see FIG. 1) provided in the reduction mechanism 24 (see FIG. 1), and the rotation of the stirring blade 2 is reduced. The speed is, for example, 90-150 revolutions per minute. Further, the stirring blade 2 repeats forward/reverse rotation according to commands from the control unit 7 (see FIG. 1), and vertically stirs the laundry 12 placed in the washing/dehydration tank 3, thereby washing, rinsing, etc. I do.

In this way, by making the surface shape of the stirring blade 2 bilaterally symmetrical, the shape of the back blade 2s of the stirring blade 2 can also be made bilaterally symmetrical, so that the opening of the circulation flow path member 26 described later The amount of washing water sprayed from 26a can be made equal regardless of whether the stirring blade 2 is rotated clockwise or counterclockwise. Further, regarding the flow path member 28, the amount of washing water sprayed from the opening 28a can be made uniform as well.

FIG. 4 is a back view of the circulation channel member.
As shown in FIG. 4, the circulation flow path member 26 is made of synthetic resin, has a water conduit 26c integrally formed with resin on the back side, and has an independent channel 26c between it and the washing/drying tank 3. A circulation waterway 26d is formed. The circulation waterway 26d is configured by arranging a pair of ribs 26c1, 26c1 on both left and right sides. The rib 26c1 also has an inclined rib 26c2 that extends upward in a straight line from the lower part to the upper part, and further inclines outward in the vertical direction so that the channel width gradually increases at the upper end. .

Furthermore, an inlet 26e is provided at the lower part of the circulation channel member 26 for allowing washing water to flow into the circulation channel 26d. Moreover, an opening 26a for spraying water as an outlet of the circulation channel 26d is provided in the upper part of the circulation channel member 26.

Further, on the back surface of the circulation channel member 26, fixing portions 26f, 26g, and 26g for fixing the circulation channel member 26 to the body plate portion 31 are provided at the center in the width direction of the water conduit 26c. Further, on the back surface of the circulation channel member 26, a plurality of hooks 26h for hooking the circulation channel member 26 to the body plate portion 31 are formed on the outside of the rib 26c1 in the width direction.

By attaching packing to the aforementioned ribs 26c1 and 26c1 (including the inclined rib 26c2) and fixing the circulation flow path member 26 to the washing and dehydrating tank 3 via the fixing parts 26f, 26g and 26g, the flow from the inlet 26e It is configured so that the washing water that has flowed in can flow out from the opening 26a without leaking on the way.

In the washing machine 1 provided with such a circulation channel member 26, a pump chamber is formed by the inner peripheral side (inner bottom part) of the bottom plate 33 and the outer peripheral side of the back blade 2s provided on the back surface of the stirring blade 2. A circulation waterway 26d is provided in communication with R (see FIG. 1). Then, the washing water is pushed outward by the force generated by the rotation of the back blade 2s provided on the back side of the stirring blade 2, so that the washing water rises through the circulation channel 26d and rises to the upper part of the circulation channel member 26. The washing water is intermittently returned to the washing/dehydrating tub 3 through the opening 26a provided in the washing/dehydrating tank 3.

FIG. 5 is a schematic diagram showing the position of the discharge hole of the washing and dehydrating tank.
As shown in FIG. 5, the washing and dehydration tank 3 has a discharge hole 31s that penetrates the body plate portion 31 toward the outer tank 6 on the back side of the circulation channel member 26 (a position facing the circulation channel 26d). Multiple formations. The discharge hole 31s has a round hole shape, for example. Further, the discharge holes 31s are formed at four locations and are arranged at equal intervals along the circumferential direction.

Further, the height of the discharge hole 31s is formed at a position higher than 1/2 (half) of the height h from the bottom plate 33 (horizontal surface of the bottom) of the washing/dehydration tank 3 to the lower surface of the fluid balancer 32. ing. Thereby, the washing water can be sprayed at a high position on the inner wall surface 6a of the outer tub 6, so that the entire area of the inner wall surface 6a where dirt tends to adhere can be washed.

Note that the washing/dehydration tank 3 facing the back side of the channel member 28 is not provided with the above-mentioned discharge hole 31s. This is because the performance of the lint filter deteriorates when the discharge hole 31s is provided.

FIG. 6 is a schematic diagram showing the flow of circulating water. FIG. 7 is an enlarged view of section A in FIG. 6.
As shown in FIG. 6, by rotating the back blade 2s of the stirring blade 2, the washing water accumulated on the bottom side of the washing and dehydrating tub 3 is pushed outward in the radial direction. Then, the washing water is changed into an upward flow through the rounded surface of the bottom plate 33 of the washing and dehydrating tub 3, and ascends through the circulation channel 26d of the circulation channel member 26. Then, it is discharged from the opening 26a at the upper end of the circulation channel member 26 toward the inside of the washing and dehydrating tank 3.

Further, as shown in FIG. 7, part of the washing water that has ascended through the circulation waterway 26d is discharged from the opening 26a, and the remaining part is discharged from the discharge hole 31s toward the outer tub 6. The discharged washing water is sprayed onto the inner wall surface 6a of the outer tub 6. The washing water sprayed onto the inner wall surface 6a falls along the inner wall surface 6a, and dirt and foreign matter adhering to the inner wall surface 6a are washed away by the washing water.

By providing the discharge hole 31s at a high position in this way, the washing water can be sprayed at a high position on the inner wall surface 6a of the outer tub 6, making it possible to wash a wide area of the inner wall surface 6a. In this embodiment, four round-shaped discharge holes 31s are formed, but the shape and number of holes can be changed as long as the configuration is such that washing water can be sprayed onto the inner wall surface 6a of the outer tub 6. It is not limited to the embodiment.

Next, a series of washing operations for washing, rinsing, and dehydrating the washing machine 1 of this embodiment will be described. First, the user puts the laundry 12 into the washing and dehydrating tub 3, turns on the power switch 13, and turns on a start switch (not shown) provided in the input switch section 14. As a result, the electromagnetic water supply valve 16 is controlled by the command from the control unit 7 to supply water to a predetermined water level, and the washing process begins. When the washing process begins, the drive motor 22 rotates clockwise, pauses, counterclockwise, and pauses under the control of the control unit 7 in accordance with the washing water flow. This controlled rotation of the drive motor 22 is transmitted to the stirring blade 2 via the deceleration mechanism 24. Therefore, the stirring blade 2 rotates in accordance with the rotation of the drive motor 22, and the laundry 12 and washing water in the washing and dehydrating tub 3 are stirred, and the laundry 12 is washed.

On the other hand, the washing water between the back blade 2s of the stirring blade 2 and the circulation channel member 26 is pushed outward by centrifugal force due to the rotation of the back blade 2s according to the rotation of the stirring blade 2, and passes through the circulation channel 26d. The washing water is intermittently discharged from a discharge hole 31s provided in the washing/dehydration tank 3 toward the inner wall surface 6a of the outer tub 6, and the inner wall surface 6a of the outer tub 6 is washed with the washing water. Further, the extruded washing water is intermittently poured into the washing/drying tank 3 from the opening 26a of the circulation channel member 26 or the lint filter (not shown) of the channel member 28. In this manner, in this embodiment, the inner wall surface 6a of the outer tank 6 is also cleaned in the washing step. Note that the discharge hole 31s is formed only in the area where the circulation channel member 26 of the washing/dehydrating tank 3 is provided, but when the washing/dehydrating tank 3 rotates in both forward and reverse directions, the outer tank 6 is Washing water can be sprayed all over the inner wall surface 6a in the circumferential direction.

In addition, when the washing water is pushed out to the circulation waterway 26d by the back blade 2s of the stirring blade 2, a new washing water is released from the water suction port 33a1 leading to the outer tank 6 provided in the bottom plate 33 below the back blade 2s of the stirring blade 2. Water is provided. That is, the washing water is supplied between the outer tub 6 and the washing/drying tub 3, and the liquid level between the outer tub 6 and the washing/drying tub 3 is such that the washing water is not in contact with the circulation channel member 26. The water level of the washing water in the washing/dehydrating tub 3 is temporarily lowered at the moment it is discharged. However, since the washing water flows into the outer tub 6 from the dehydration hole 31a and the discharge hole 31s of the washing and dehydration tank 3, and from the gap between the washing and dehydration tank 3 and the stirring blade 2, there is a difference in the liquid level. It is balanced by the value and remains constant.

When the washing operation is completed, the drain valve 18 is opened, and the washing water in the outer tub 6 is discharged to the outside of the washing machine 1 via the drain hose 11. After the intermediate dehydration is performed, the first rinsing step is performed. In intermediate dehydration, the washing and dehydration tank 3 rotates at high speed, and the washing water separated from the laundry is discharged from the dehydration hole 31a onto the inner wall surface 6a of the outer tub 6, thereby washing the inner wall surface 6a of the outer tub 6. It will be done. Note that the inner wall surface 6a is similarly cleaned during the intermediate dehydration and final dehydration of the second rinse to be described later.

Then, in response to a command from the control unit 7, the electromagnetic water supply valve 16 is controlled to supply water up to a predetermined water level. Even in the first rinsing step, the drive motor 22 rotates under the control of the control unit 7 through clockwise rotation, pause, counterclockwise rotation, and pause depending on the washing water flow. This controlled rotation of the drive motor 22 is transmitted to the stirring blade 2 via the deceleration mechanism 24. Therefore, the stirring blade 2 rotates in accordance with the rotation of the drive motor 22, and the laundry 12 and washing water in the washing and dehydrating tub 3 are stirred, and the laundry 12 is rinsed.

On the other hand, the washing water between the back blade 2s of the stirring blade 2 and the circulation channel member 26 is pushed outward by centrifugal force due to the rotation of the back blade 2s according to the rotation of the stirring blade 2, and passes through the circulation channel 26d. The washing water is intermittently discharged from the discharge hole 31s provided in the washing/dehydration tank 3 toward the inner wall surface 6a of the outer tub 6, and the inner wall surface 6a of the outer tub 6 is washed with the washing water in the rinsing process. Further, the extruded washing water is intermittently poured into the washing/drying tank 3 from the opening 26a of the circulation channel member 26 or the lint filter (not shown) of the channel member 28. In this way, in this embodiment, the inner wall surface 6a of the outer tank 6 is cleaned even in the first rinsing step. Note that the discharge hole 31s is formed only in the area where the circulation channel member 26 of the washing/dehydrating tank 3 is provided, but when the washing/dehydrating tank 3 rotates in both forward and reverse directions, the outer tank 6 is Washing water can be sprayed all over the inner wall surface 6a in the circumferential direction.

When the rinsing operation is completed, the drain valve 18 is opened, and the washing water in the outer tub 6 is discharged to the outside of the washing machine 1 via the drain hose 11. After the intermediate dehydration is performed, a second rinsing step is performed. Then, in response to a command from the control unit 7, the electromagnetic water supply valve 16 is controlled to supply water up to a predetermined water level. After this second rinsing step, the final dehydration begins. In this second rinsing step, as in the first rinsing step, washing water is discharged from the discharge hole 31s toward the inner wall surface 6a of the outer tub 6, and the inner wall surface 6a of the outer tub 6 is rinsed for the second time. It is washed by washing water in the process.

As explained above, in the washing machine 1 of the present embodiment, the outer tub 6, the washing/dehydrating tub 3 rotatably housed in the outer tub 6, and the washing/dehydrating tub 3 rotatably housed in the inner bottom of the washing/dehydrating tub 3. The stirring blade 2 supported by the stirring blade 2, the back blade 2s provided on the lower surface of the stirring blade 2, the drive motor 22 that rotationally drives the stirring blade 2 and the washing/drying tank 3, and the inner surface 3a of the washing/drying tank 3. A circulation flow path member 26 is provided in which the washing water at the inner bottom of the washing/drying tub 3 is raised and returned to the washing/drying tub 3 by rotation of the back blade 2s. A discharge hole 31s is formed in the washing and dewatering tank 3 on the back side of the circulation channel member 26. The discharge hole 31s discharges washing water toward the inner wall surface 6a of the outer tub 6 when the back blade 2s rotates. According to this, the inner wall surface 6a of the outer tank 6 can be cleaned in the washing process and the rinsing process. As a result, the inner wall surface 6a of the outer tank 6 can be constantly cleaned without providing a separate tank cleaning device and without requiring the user to set whether or not a tank cleaning course is to be performed.

Moreover, in this embodiment, a plurality of discharge holes 31s are formed side by side along the circumferential direction of the washing and dehydrating tub 3. Thereby, the area that can be cleaned at one time can be expanded, and cleaning efficiency can be improved.

Further, in this embodiment, the discharge hole 31s is formed at a position higher than half of the height H from the bottom surface of the bottom plate 33 of the washing and dehydrating tank 3 to the lower surface of the fluid balancer 32. Thereby, the washing water can be sprayed at a high position on the inner wall surface 6a of the outer tub 6, so that the washing range can be expanded.

Further, in this embodiment, a plurality of circulation flow path members 26 are provided in the washing and dehydration tank 3, and the discharge hole 31s is formed in the washing and dehydration tank 3 in which each of the circulation flow path members 26 is located. ing. Thereby, the area that can be cleaned at one time can be expanded, and cleaning efficiency can be improved.

Further, in this embodiment, the washing/dehydration tank 3 is formed with a dehydration hole 31a at a position away from the circulation flow path member 26 for discharging washing water toward the outer tub 6 during a dehydration operation. This allows washing water to be discharged from the dehydration hole 31a toward the inner wall surface 6a of the outer tub 6 even during dehydration operation, so that the washing water can be discharged from the dehydration hole 31a toward the inner wall surface 6a of the outer tub 6. The cleaning efficiency of the wall surface 6a can be improved.

Note that the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention. In the above-described embodiment, the case where two circulation flow path members 26 are provided has been described, but the present invention is not limited to this, and there may be one circulation flow path member 26, and three or more circulation flow path members 26 may be provided. It may be provided.

Further, the number of the discharge holes 31s is not limited to four, and may be three or less, or five or more. Further, the discharge hole 31s may have a constricted shape so that the diameter becomes smaller toward the outer tank 6. Thereby, the force of the washing water discharged from the discharge hole 31s can be increased, and the cleaning performance of the inner wall surface 6a can be improved. Further, from the viewpoint of strength, it is preferable that the discharge hole 31s be formed into a round hole shape rather than an elongated hole shape.

1 Washing machine 2 Stirring blade 2s Back blade (blade part)
3 Washing/dehydration tank 3a Inner surface 6 Outer tank 6a Inner wall surface (inner surface)
16 Electromagnetic water supply valve (water supply means)
22 Drive motor (drive means)
26 Circulation channel member 26a Opening portion 31 Body plate portion 31a Dehydration hole 31s Discharge hole 32 Fluid balancer 33 Bottom plate

Claims (5)

outer tank and
a washing/dehydration tank rotatably housed in the outer tank;
a stirring blade rotatably supported at the inner bottom of the washing/dehydration tank;
a blade section provided on the lower surface of the stirring blade;
a driving means for rotationally driving the stirring blade and the washing and dehydrating tank;
a circulation flow path member provided on the inner surface of the washing and dehydrating tank, and causing the washing water at the inner bottom of the washing and dehydrating tank to rise and return to the inside of the washing and dehydrating tank when the blade portion rotates; ,
The washing and dewatering tub is characterized in that a discharge hole is formed on the back side of the circulation channel member to discharge washing water toward the inner wall surface of the outer tub when the blade portion rotates. Machine. The washing machine according to claim 1, wherein a plurality of the discharge holes are formed in parallel along the circumferential direction of the washing and dehydrating tub. The washing machine according to claim 1, wherein the discharge hole is formed at a position higher than half of the height from the bottom plate of the washing and dehydrating tub to the lower surface of the fluid balancer. A plurality of the circulation flow path members are provided in the washing and dehydration tank,
The washing machine according to any one of claims 1 to 3, wherein the discharge hole is formed in the washing and dehydrating tub in which each of the circulation flow path members is located. 2. The washing and dehydration tank has a dehydration hole formed at a position away from the circulation flow path member for discharging washing water toward the outer tank during dehydration operation. washing machine.