WO2016091080A1 - Washing machine - Google Patents

Abstract

A washing machine having reduced parts for a structure that draws and discharges water to a washing tank. A washing machine (1) comprises: an external tank (3), capable of storing water; a washing tank (5), accommodated in the external tank (3), provided with through holes (23) for water to flow between the washing tank (5) and the external tank (3), accommodating laundries and capable of rotating; a water passage (4), drawing water stored in the external tank (3); a discharge port (11), discharging water drawn through the water passage (4) from an upper portion Z1 to the washing tank (5); and blades (40). The blades (40) are integrally disposed on a bottom wall (21) of the washing tank (5), rotate with the washing tank (5) as a whole, and send the water stored in the external tank (3) to the water passage (4).

Description

washing machine Technical field

The invention relates to a washing machine.

Background technique

In the washing machine of the following Patent Document 1, the bottom of the washing and dewatering tank is rotatably provided with a rotating blade for stirring the laundry, and a water lifting blade is rotatably provided below the rotating blade.

The drive shaft of the drive motor is directly coupled to the rotary wing, and the water lift wing is coupled to the rotary wing via a planetary gear mechanism. After the torque of the drive motor is transmitted to the rotary wing, it is transmitted to the airfoil via the planetary gear mechanism.

The inner side wall of the washing and dewatering tank is provided with a water passage. When the waterfoil is rotated, the washing liquid accumulated in the washing and dewatering tank is sent to the water-lifting path through the water-lifting wing, and rises in the water-lifting path, and is sent back to the washing and dewatering tank from the discharge port of the water-lifting channel.

Prior art literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2010-94248

Problem to be solved by the invention

In the washing machine of Patent Document 1, in order to return the washing liquid accumulated in the washing and dewatering tank to the washing and dewatering tank via the water passage, it is necessary to separately provide a water-lifting vane and a planetary gear for transmitting torque from the rotating wing to the water-lifting fin. Institutions, therefore, there will be an increase in the number of parts.

Summary of the invention

The present invention has been made in such a background, and an object thereof is to provide a washing machine capable of reducing the number of parts in a structure in which water is drained and discharged into a washing tub.

Method for solving the problem

The washing machine of the present invention is characterized by comprising: an outer tank capable of storing water; and a washing tank housed in the outer tank, having a through hole for supplying water between the washing tank and the outer tank, and accommodating Washing and rotating; a water path for extracting water accumulated in the outer tank; a discharge port for discharging water drawn through the water passage from above into the washing tub; and a blade integrally provided in the washing tub The bottom wall passes through the washing tub to rotate the water, and the water accumulated in the outer tub is sent to the water passage.

Further, the present invention is characterized in that the water passage is provided in plurality on the outer side surface of the outer tub.

Further, the present invention is characterized in that a receiving port for receiving water accumulated in the outer tub in the water passage is provided in the vicinity of a bottom wall of the washing tub.

Further, the present invention is characterized in that the receiving port is set to be the same height as the blade.

Further, the present invention is characterized in that the receiving port is disposed to face between a normal direction with respect to a rotation direction of the washing tub and a tangential direction with respect to the rotating direction.

Further, the present invention is characterized in that a labyrinth structure for preventing water accumulated in the outer tub from leaking to a gap between the outer tub and the washing tub located above the receiving port is provided.

Further, the present invention is characterized in that a drain port for discharging water in the outer tank and a water for discharging water above a predetermined water level in the outer tank to the outside of the outer tank are formed in the outer tank. An overflow port, the waterway being separately disposed from the drain port and the overflow port.

Effect of the invention

According to the invention, in the washing machine, the washing tub for accommodating the laundry is rotatably accommodated in the outer tub. The water path draws water accumulated in the outer tank. The extracted water is discharged from the upper side into the washing tub through the discharge port. The water in the washing tub passes through the through hole of the washing tub, whereby the washing tank and the outer tub can travel between.

Thereby, water is used for washing while circulating, so that water can be saved. Further, when washing the laundry, the detergent which is discharged by the water and falling in the washing tub can foam the detergent in the washing tub, and therefore, the laundry can be effectively washed by the foaming detergent. . Further, by the water discharged from the upper side in the washing tank, the mechanical force generated by the falling of the water acts on the laundry, the cleaning power can be improved, and the laundry can be efficiently rinsed, so that the rinsing operation time can be realized. shorten.

The bottom wall of the washing tub is integrally provided with blades, and the water accumulated in the outer tub is sent to the water passage by rotating integrally with the washing tub. Thereby, the centrifugal force generated by the water in the outer tank and the synergistic effect of the blades accompanying the rotation of the washing tub can supply a large amount of water in the outer tank to the water passage. Therefore, it is possible to increase the amount of water taken by the waterway.

Since the vanes are integrally provided in the washing tub, if the vanes are integrally formed with the washing tub, it is not necessary to newly install other components. Further, since the blade and the washing tub are integrally rotated, there is no need to separately provide a mechanism for independently rotating the blade. Thereby, the number of components can be reduced in the structure in which the water is drained and the water is discharged into the washing tub.

Further, according to the present invention, water in the outer tank can be extracted in a large amount by a plurality of water passages. In addition, in the case where the water passage is provided on the outer side surface of the outer tank, compared with the case where the water passage is provided in the outer tank, The waterway is designed from the ground so that the pressure and flow of water drawn through the waterway can be freely adjusted.

Further, according to the present invention, since the receiving port of the water passage is provided near the bottom wall of the washing tub, it is located at a position where the water accumulated in the outer tub is directly received. Therefore, by receiving a large amount of water in the outer tank at the receiving port, the amount of water drawn through the water passage can be increased.

Further, according to the present invention, since the receiving port of the water passage is set to have the same height as the blade, it is located at a position near the blade where the water is sent to the waterway. Therefore, by receiving a large amount of water fed by the blade at the receiving port, the amount of water taken through the waterway can be increased.

Further, according to the present invention, since the receiving port of the water passage is disposed between the normal direction with respect to the rotational direction of the washing tub and the tangential direction with respect to the rotating direction, the water flowing in the blade fed by the rotating flow direction Destination. Therefore, by receiving a large amount of water fed by the blades at the receiving port, the amount of water drawn through the water passage can be increased.

Further, according to the present invention, it is possible to prevent the water accumulated in the outer tub from leaking to the gap between the outer tub and the washing tub above the receiving port of the water passage by the labyrinth structure. Thereby, the water fed through the blades can be efficiently received at the receiving port without leaking the water to the gap between the outer tub and the washing tub, so that the amount of water drawn through the water passage can be increased.

Further, according to the present invention, the water passage is separately disposed from the drain port and the overflow port. Thereby, the water accumulated in the outer tub is stably sucked and discharged into the washing tub without being affected by the water flowing through the steps of the drain port and the overflow port.

DRAWINGS

Fig. 1 is a perspective view of an internal structure of a washing machine 1 according to an embodiment of the present invention as seen from above.

2 is a longitudinal sectional view showing the internal structure of the washing machine 1.

Fig. 3 is an enlarged view of a main part of Fig. 2.

Fig. 4 is a cross-sectional view taken along line A-A of Fig. 2;

Fig. 5 is a view showing a first modification applied to Fig. 4;

Fig. 6 is a view showing a second modification applied to Fig. 4;

Description of the reference numerals

1 washing machine

3 outer slot

4 waterway

5 sink

6A outer perimeter

11 discharge

13 receiving port

21 bottom wall

23 through hole

40 blades

42 clearance

43 labyrinth structure

50 drain

52 overflow

P normal direction

Q tangent direction

S circumferential

Above Z1

detailed description

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

Fig. 1 is a perspective view of an internal structure of a washing machine 1 according to an embodiment of the present invention as seen from above.

It should be noted that, in the case where the direction of the washing machine 1 is mentioned, the posture of the washing machine 1 in Fig. 1 is taken as a reference. The up and down direction in Fig. 1 coincides with the vertical direction Z (longitudinal direction) of the washing machine 1. The left-right direction in FIG. 1 coincides with the left-right direction X of the washing machine 1. In the up and down direction Z, the upper side is referred to as the upper Z1, and the lower side is referred to as the lower Z2. In the left-right direction X, the left side is referred to as the left side X1, and the right side is referred to as the right side X2. The direction orthogonal to both the up-down direction Z and the left-right direction X is the front-back direction Y of the washing machine 1. In the front-rear direction Y, the front is referred to as the front Y1, and the rear is referred to as the rear Y2. The left-right direction X and the front-rear direction Y are included in the horizontal direction H (lateral direction).

The washing machine 1 includes a casing 2, an outer tank 3, a water path 4, and a washing tub 5.

The casing 2 is a hollow body having a substantially rectangular parallelepiped shape, and the outer tank 3, the water path 4, and the washing tub 5 are housed in the casing 2.

The outer tub 3 is supported by the casing 2 via a plurality of hangers (not shown) having a spring and a damper mechanism. The outer groove 3 is formed in a cylindrical shape having an axis extending in the vertical direction Z, and is made of resin. The circumferential direction of the cylindrical outer tank 3 is referred to as a circumferential direction S, and the radial direction of the outer tank 3 is referred to as a radial direction R. The outer groove 3 has a cylindrical side wall 6 extending in the vertical direction Z, a disk-shaped bottom wall 7 extending flat in the horizontal direction H and blocking the lower end of the side wall 6, and the upper end portion of the side wall 6 The circumferential direction S extends all the way to the annular wall 8 of the inner side of the radial direction R. The outer peripheral surface 6A of the side wall 6 is the outer side surface of the outer tank 3. Water can be accumulated in the outer tank 3 from the side of the bottom wall 7.

An opening 9 defined by the inner periphery of the annular wall 8 is formed at the upper end of the outer tub 3. The opening 9 exposes the inside of the outer tank 3 to the upper portion Z1. The annular wall 8 has an internal space 10 extending in the circumferential direction S, and a discharge port 11 that cuts the inner peripheral edge portion of the annular wall 8 in the circumferential direction S and exposes the internal space 10 to the inside in the radial direction R. The annular wall 8 has a plurality of (here four) projections 12. The plurality of protruding portions 12 are arranged at intervals in the circumferential direction S, and are formed to protrude from the outer peripheral edge portion of the annular wall 8 in a substantially triangular shape from the outer peripheral edge portion of the annular wall 8 as viewed from the upper side Z1. Each of the protruding portions 12 is a hollow body that constitutes a part of the internal space 10. Each of the protruding portions 12 is disposed at four corners of the casing 2 formed in a substantially quadrangular shape in plan view.

The water passage 4 is a slender tube made of resin, and is provided in plurality on the outer peripheral surface 6A of the side wall 6 so as to be the same as the number of the protruding portions 12 (here, four). The water passage 4 has a lower end portion 4A that extends in the horizontal direction H from the lower end portion of the side wall 6 of the outer tub 3 toward the outer side in the radial direction R, and a middle portion 4B that is bent from the lower end portion 4A and extends upward along the outer peripheral surface 6A toward the upper portion Z1. And extending from the intermediate portion 4B to the upper portion Z1 and from the lower portion Z2 to the upper end portion 4C of the protruding portion 12. The intermediate portion 4B does not need to extend linearly in the vertical direction Z, and may extend to the upper portion Z1 while being bent or bent as needed.

The water passages 4 and the projections 12 are also arranged one by one at the four corners of the casing 2. Each of the water passages 4 has a receiving port 13 at a connecting portion between the lower end portion 4A and the side wall 6 of the outer tub 3, and the internal space of the water passage 4 communicates with the inside of the outer tub 3 through the receiving port 13. The internal space of each water passage 4 communicates with the internal space 10 of the annular wall 8 of the outer tub 3 through the connecting portion of the upper end portion 4C and the protruding portion 12.

The washing tub 5 is formed in a cylindrical shape having an axis extending in the up-and-down direction Z, and is slightly smaller than the outer tub 3. The washing tub 5 accommodates laundry. The washing tub 5 has a cylindrical metal side wall 20 formed to extend in the vertical direction Z, and a resin bottom wall 21 that extends flat in the horizontal direction H and blocks the lower end of the side wall 20 and is formed into a disk shape. And a resin balance ring 22 that is attached to the upper end of the washing tub 5. A plurality of through holes 23 are formed in the side wall 20 and the bottom wall 21, respectively.

The balance ring 22 is an annular hollow body having an inner space for accommodating the liquid, and an upper end portion of the side wall 20 Coaxial assembly. As will be described later, when the washing tub 5 is rotated, the rotation balance of the washing tub 5 is maintained by the movement of the liquid in the balance ring 22. An opening 24 defined by the inner circumference of the balance ring 22 is formed at the upper end of the washing tub 5. The opening 24 exposes the inside of the washing tub 5 to the upper side Z1.

The washing tub 5 is housed in the outer tub 3 and is disposed substantially coaxially with the outer tub 3. Therefore, the circumferential direction of the washing tub 5 is the circumferential direction S, and the radial direction of the washing tub 5 is the radial direction R. The opening 24 of the washing tub 5 communicates from the lower Z2 to the opening of the outer tub 3. The openings 9 and 24 in the communicating state constitute the inlet and outlet 25 of the laundry. The user of the washing machine 1 puts the laundry into the washing tub 5 from the upper Z1 via the inlet and outlet 25. In the washing tub 5 accommodated in the outer tub 3, the bottom wall 21 faces the bottom wall 7 of the outer tub 3 from the upper side Z1 with a gap therebetween.

The water accumulated in the outer tub 3 passes through the through holes 23 respectively located in the side wall 20 and the bottom wall 21 of the washing tub 5, thereby coming between the outer tub 3 and the washing tub 5. Therefore, the water level in the outer tank 3 and the water level in the washing tank 5 substantially coincide.

2 is a longitudinal sectional view showing the internal structure of the washing machine 1. Fig. 3 is an enlarged view of a main portion surrounded by a circle of a broken line in Fig. 2; Fig. 4 is a cross-sectional view taken along line A-A of Fig. 2; The following description mainly refers to FIG. 2 and FIG.

The washing machine 1 includes a motor 30. The motor 30 generates torque by electric driving. The motor 30 is disposed in the casing 2 below the lower wall Z2 of the bottom wall 7 of the outer tank 3. The motor 30 has an output shaft 31 for outputting torque. The output shaft 31 extends from the motor 30 to the upper Z1. A transmission shaft 32 that extends upward Z1 is coaxially disposed above Z1 of the output shaft 31. The output shaft 31 and the transmission shaft 32 are coupled to each other by a transmission mechanism 33 constituted by a speed reduction mechanism or the like.

The drive shaft 32 penetrates the center portion of the bottom wall 7 of the outer groove 3 and extends upward Z1. The upper end portion of the transmission shaft 32 is coupled to a central portion of the bottom wall 21 of the washing tub 5. The torque generated by the motor 30 is transmitted to the drive shaft 32 via the output shaft 31 and the transmission mechanism 33. Thereby, the washing tub 5 rotates together with the drive shaft 32 with the drive shaft 32 as a center of rotation. The rotation direction of the washing tub 5 coincides with the circumferential direction S.

The washing tub 5 is rotated in a state where the detergent is dissolved in the water accumulated in the outer tub 3, whereby the washing operation of the laundry accommodated in the washing tub 5 is performed. After the washing operation, the washing tub 5 is operated in a state of being supplied with water from the outer tub 3, whereby the rinsing operation of the laundry contained in the washing tub 5 is performed. The washing tub 5 is rotated at a high speed in a state where the outer tank 3 is drained, whereby the dehydrating operation of the laundry accommodated in the washing tub 5 is performed.

In association with the water passage 4, a plurality of blades 40 projecting downward Z2 are integrally provided on the lower surface 21A of the bottom wall 21 of the washing tub 5. Each of the vanes 40 is formed to be thin in the circumferential direction S and linear in the radial direction R The extended plate shape is radially arranged with reference to the center of the bottom wall 21 (see FIG. 4). These blades 40 are made of resin and integrally formed with the bottom wall 21. The vanes 40 are disposed in the gap 41 between the bottom wall 21 and the bottom wall 7 of the outer tub 3 in the vertical direction Z without being in contact with the outer tub 3.

The receiving port 13 of the lower end portion 4A of each of the water passages 4 is provided in the vicinity of the bottom wall 21 of the washing tub 5. In detail, the receiving port 13 is set to be the same height as the blade 40.

When the washing tub 5 receives the torque of the motor 30 and rotates, the blade 40 of the bottom wall 21 of the washing tub 5 rotates integrally with the washing tub 5. Thereby, the blade 40 collects the water accumulated in the outer tub 3, and in detail, the water existing in the gap 41 between the bottom wall 21 of the washing tub 5 and the bottom wall 7 of the outer tub 3 is sent to the receiving of each waterway 4. Mouth 13. Therefore, the water accumulated in the outer tub 3 is successively sent to the receiving port 13 of the waterway 4 through the rotating blades 40, and is received into the waterway 4 through the receiving port 13.

The water received into the water path 4 is pushed by the subsequent water, thereby rising in the water path 4. The water rising to the upper end portion 4C of the water passage 4 flows into the inner space 10 of the annular wall 8 from the protruding portion 12 (see FIG. 1) of the annular wall 8 of the outer groove 3, as indicated by a broken line arrow, from the annular wall 8 The discharge port 11 of the inner peripheral portion is discharged into the washing tub 5, and flows downward obliquely in the washing tub 5.

In this manner, the water path 4 draws the water accumulated in the outer tank 3, and the discharge port 11 discharges the water drawn through the water path 4 from the upper side Z1 into the washing tank 5. The water in the washing tub 5 passes through the through hole 23 of the washing tub 5, thereby coming between the washing tub 5 and the outer tub 3.

Thereby, water is used for washing while circulating, so that water can be saved. The laundry in the washing tub 5 is stirred by the rotating washing tub 5 and the water discharged from the upper Z1. Further, when washing the laundry, the detergent which is discharged by the water and falling in the washing tub 5 can cause the detergent in the washing tub 5 to foam, and therefore, the laundry can be effectively washed by the foaming detergent. Washing is carried out. In addition, the water discharged from the upper side Z1 into the washing tub 5 acts on the laundry by the mechanical force generated by the falling of the water, thereby improving the washing power and efficiently rinsing the laundry, thereby enabling the rinsing operation. The time is shortened.

As shown in FIG. 4, the blade 40 integrally provided in the bottom wall 21 of the washing tub 5 rotates integrally with the washing tub 5, whereby the water accumulated in the outer tub 3 is sent to the waterway 4 as indicated by a thick arrow. Receiving port 13. Thereby, the centrifugal force generated by the water in the outer tank 3 and the synergistic effect of the blades 40 accompanying the rotation of the washing tub 5 can feed the water in the outer tub 3 into the water passage 4 in a large amount. Therefore, the amount of water taken by the water path 4 can be increased.

Since the blade 40 is integrally provided in the washing tub 5, if the blade 40 is washed as described above When the groove 5 is integrally formed, it is not necessary to re-set other components. Further, since the blade 40 and the washing tub 5 are integrally rotated, there is no need to separately provide a mechanism for independently rotating the blade 40. Thereby, in the structure in which the water is drained and the water is discharged into the washing tub 5, the number of parts can be reduced.

The water in the outer tank 3 can be extracted in a large amount by the plurality of water passages 4. Since each of the water passages 4 is provided outside the outer peripheral surface 6A of the side wall 6 of the outer tub 3, that is, outside the outer tub 3, the water passage 4 can be freely designed as compared with the case where the water passage 4 is provided in the outer tub 3. Therefore, the pressure and flow rate of the water drawn through the water path 4 can be freely adjusted. Specifically, if the thick water passage 4 enlarges the internal space of the water passage 4, the amount of water can be increased, and if the reduced water passage 4 narrows the internal space of the water passage 4, the water pressure can be increased.

As shown in FIG. 3, since the receiving port 13 of the water path 4 is provided in the vicinity of the bottom wall 21 of the washing tub 5, it is located in the position which directly receives the water accumulated in the outer tank 3. Therefore, by receiving a large amount of water in the outer tub 3 from the receiving port 13, the amount of water drawn through the water passage 4 can be increased. In particular, since the receiving port 13 of the water path 4 is set to have the same height as the blade 40, it is located in the vicinity of the blade 40 that feeds the water into the water path 4. Therefore, by receiving a large amount of water fed through the blade 40 from the receiving port 13, the amount of water drawn through the water path 4 can be increased.

In order to smoothly rotate the washing tub 5 in the outer tub 3, a gap 42 is secured between the inner peripheral surface 6B of the side wall 6 of the outer tub 3 and the outer peripheral surface 20A of the side wall 20 of the washing tub 5. The gap 42 is formed in an annular shape extending in the circumferential direction S and surrounding the washing tub 5. It is conceivable that when the rotating blade 40 feeds the water accumulated in the outer tub 3 into the receiving port 13, the water leaks to the gap 42 above the receiving port 13 of Z1. Therefore, the washing machine 1 is provided with a labyrinth structure 43 for preventing water from leaking to the gap 42.

The labyrinth structure 43 includes a part of the lower end portion of the inner peripheral surface 6B of the side wall 6 of the outer tank 3, that is, a flat surface 44 that extends outward in the radial direction R. The flat surface 44 is located above the receiving port 13 Z1. The labyrinth structure 43 further includes a transverse flange 45 projecting from the lower end portion of the outer peripheral surface 20A of the side wall 20 of the washing tub 5 toward the outer side in the radial direction R and a whole direction Z2 from the circumferential direction S of the lower end of the side wall 20 downward. An extended annular longitudinal flange 46.

The horizontal flange 45 is formed in a thin plate shape in the vertical direction Z. The lateral flange 45 may also be formed in an annular shape extending in the circumferential direction S. The lower surface 45A of the lateral flange 45 faces the flat surface 44 from the upper side Z1 via the gap 47, and the lower surface 45A and the flat surface 44 extend in parallel in the horizontal direction H. The gap 47 is a thin space in the vertical direction Z.

The lower end of the vertical flange 46 is located above the receiving port 13 of each water passage 4 Z1. Each of the vanes 40 is protruded from the lower side Z2 of the lower end of the vertical flange 46. The outer end portion of the radial direction R of each of the vanes 40 is located at the same position as the longitudinal flange 46, and is disposed to approach the receiving port 13 of the water passage 40 from the inner side of the radial direction R. Longitudinal flange 46 faces the portion of the lower surface Z2 of the flat surface 44 with the gap 48 interposed therebetween from the inner side in the radial direction R over the entire inner circumferential surface 6B of the side wall 6 . The gap 48 is a thin annular space in the radial direction R, and the lower Z2 communicates with the inner portion of the radial direction R of the gap 47.

The gaps 47 and 48 are the narrowest portions of the gap between the outer tank 3 and the washing tub 5. Further, before the water accumulated in the outer tank 3 reaches the gap 42 above the receiving port 13 of each water passage 4, it must first rise in the gap 48, and then the flow direction is changed at an angle of a substantially right angle at the upper end portion of the gap 48, along the diameter. The gap 47 flows through R. Here, it is difficult for the water accumulated in the outer tub 3 to reach the gap 42 beyond the gaps 47 and 48.

Thereby, since the water fed through the blade 40 can be efficiently received through the receiving port 13 without allowing water to escape to the gap 42 of the outer tub 3 and the washing tub 5, the amount of water drawn through the water passage 4 can be increased. In addition, when the washing tub 5 rotates, the vibration of the lower end portion where the gaps 47 and 48 are located in the washing tub 5 is small, so even if the gaps 47 and 48 are narrow, the washing tub 5 in rotation does not outer. The groove 3 is in contact. On the other hand, in order to prevent the upper portion of the washing tank 5 that is in the middle of the rotation from being in contact with the outer tank 3, the gap 42 is formed to be stepwise outward in the radial direction R as it goes upward (see FIG. 2). .

Referring to the waterway 4 at the left end in Fig. 4, the receiving port 13 of each waterway 4 is disposed to face between the normal direction P with respect to the circumferential direction S and the tangential direction Q with respect to the circumferential direction S. That is, the receiving port 13 is configured to face the oblique direction K that is inclined toward both the normal direction P and the tangential direction Q. It should be noted that the washing tub 5 of the present embodiment rotates in a direction opposite to the direction of the receiving port 13 (counterclockwise in FIG. 4).

In this case, the receiving port 13 of the water passage 4 is located at the flow target of the water fed through the blade 40 that rotates integrally with the washing tub. Therefore, by receiving a large amount of water fed through the blade 40 from the receiving port 13, the amount of water drawn through the water path 4 can be increased.

Fig. 5 is a view showing a first modification applied to Fig. 4;

Referring to Fig. 5, at the bottom wall 7 of the outer tub 3, a drain port 50 for discharging water in the outer tub 3 is formed at a position on the circumferential direction S. A drain passage 51 (see FIG. 2) that discharges water to the outside of the washing machine 1 is connected to the drain port 50. In the side wall 6 of the outer tank 3, a water overflow port 52 for overflowing water of a predetermined water level or more in the outer tank 3 to the outside of the outer tank 3 is formed at a position spaced apart from the bottom wall 7 by a predetermined distance Z1. The overflow port 52 is connected to an overflow passage 53 that guides water overflowing from the overflow port 52 to the drain passage 51.

Each of the water passages 4 is preferably disposed separately from the drain port 50 and the overflow port 52. Specifically, the drain port 50 and the overflow port 52 may be disposed between the adjacent two water passages 4 in the circumferential direction S. More preferably, the drain port 50 and the overflow port 52 are respectively disposed in the circumferential direction S with the adjacent water channel 4, respectively. Separate locations that are approximately equal distances. With such a configuration, the water accumulated in the outer tub 3 can be stably drawn and discharged into the washing tub 5 without being affected by the water flowing through the drain port 50 and the step 60 in the vicinity of the overflow port 52.

Fig. 6 is a view showing a second modification applied to Fig. 4; In the above-described embodiment and the first modification, each of the vanes 40 of the lower surface 21A of the bottom wall 21 of the washing tub 5 is formed in a plate shape which is thin in the circumferential direction S and linearly extends in the radial direction R, and is bottomed. The center of the wall 21 is radially arranged on the basis of the reference (see FIGS. 4 and 5). However, as shown in FIG. 6, these vanes 40 may be formed in a plate shape which is thin in the circumferential direction S and which is curved so as to be curved from the lower side Z2 so as to intersect with the radial direction R. Specifically, each of the vanes 40 is radially arranged on the basis of the center of the bottom wall 21 as viewed from the lower side Z2, and is oriented in the same direction in the circumferential direction S as the outer side of the radial direction R (the counterclockwise direction in FIG. 6). The way of warping is curved.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the claims.

For example, in the above-described embodiment, the number of the water passages 4 is four, but it can be arbitrarily changed. Further, each water path 4 may differ in shape.

The blade 40 is integrally formed with the bottom wall 21 of the washing tub 5, but may be separately molded to the bottom wall 21 and then fixed to the bottom wall 21 by a connecting member such as a screw.

As described above, when the washing tub 5 is rotated in one direction opposite to the direction of the receiving port 13, the receiving port 13 of each waterway 4 is disposed so as to face the normal direction P with respect to the circumferential direction S and with respect to the circumferential direction S. Between the tangential directions Q (see Figure 4). When the washing tub 5 is not rotated in one direction but rotated in both the forward and reverse directions, the receiving port 13 may be disposed to face the normal direction P. In this way, regardless of which direction the washing tub 5 is rotated in the forward and reverse directions, the receiving port 13 can receive the water fed through the blade 40 in an equal amount.

The laundry in the washing tub 5 is stirred by the rotating washing tub 5 and the water discharged from the upper Z1 by the water passage 4. However, in order to stir the laundry, a rotating agitator may be additionally provided in the washing tub 5.

The material of each of the above members is just an example. For example, the bottom wall 21 of the washing tub 5 may not be entirely made of resin, and the portion to which the conveying shaft 32 is coupled may be made of metal.

In the specification, the vertical washing machine 1 in which the center of rotation of the washing tub 5 extends in the vertical direction Z is exemplified, but the washing tub 5 may be disposed to be inclined so that the center of rotation thereof obliquely extends in the vertical direction Z.

Claims (7)

A washing machine, comprising: An outer tank capable of storing water; a washing tank, accommodated in the outer tank, having a through hole for supplying water between the washing tank and the outer tank, accommodating the laundry and being rotatable; a waterway that draws water accumulated in the outer tank; a discharge port for discharging water drawn through the water passage from above into the washing tub; The vane is integrally provided on a bottom wall of the washing tub, and the water accumulated in the outer tub is sent to the water passage by rotating integrally with the washing tub. A washing machine according to claim 1, wherein The water passage is provided in plurality on the outer side surface of the outer tank. A washing machine according to claim 1 or 2, characterized in that A receiving port for receiving water accumulated in the outer tank in the water passage is provided in the vicinity of a bottom wall of the washing tub. A washing machine according to claim 3, characterized in that The receiving port is set to be the same height as the blade. A washing machine according to claim 3 or 4, characterized in that The receiving port is disposed to face between a normal direction with respect to a rotation direction of the washing tub and a tangential direction with respect to the rotating direction. A washing machine according to any one of claims 3 to 5, characterized in that A labyrinth structure for preventing a gap between the outer tank and the washing tub in which water accumulated in the outer tub leaks to the upper side of the receiving port is provided. A washing machine according to any one of claims 1 to 6, wherein A drain port for discharging water in the outer tank and an overflow port for overflowing water of a predetermined water level or more in the outer tank to the outside of the outer tank are formed in the outer tank, The waterway is separately disposed from the drain port and the overflow port.

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