JP2016106942A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of reducing the number of components in a configuration for pumping water and discharging it in a washing tub.SOLUTION: A washing machine 1 includes: an outer tub 3 in which water is stored; a washing tub 5 stored in the outer tub 3, having through-holes 23 for allowing the water to come and go between the outer tub 3 and itself, and capable of rotating by storing laundry; a water passage 4 for pumping the water stored in the outer tub 3; a discharge port 11 for discharging the water pumped by the water passage 4 into the washing tub 5 from an upper side Z1; and a vane 40. The vane 40 is integrally provided on a bottom wall 21 of the washing tub 5, and delivers the water stored in the outer tub 3 into the water passage 4 by integrally rotating with the washing tub 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing machine.

  In the washing machine of the following Patent Document 1, a rotating blade for stirring the laundry is rotatably provided at the bottom of the washing and dewatering tub, and a pumping blade is rotatably provided below the rotating blade.

  A drive shaft of a drive motor is directly connected to the rotor blade, and the pumping blade is connected to the rotor blade via a planetary gear mechanism. The torque of the drive motor is transmitted to the rotor blades, and then transmitted to the pumping blades through the planetary gear mechanism.

  A pumping path is provided on the inner wall of the washing and dewatering tub. When the pumping blade rotates, the washing liquid accumulated in the washing / dehydrating tub is sent to the pumping channel by the pumping wing, moves up in the pumping channel, and returns to the washing / dehydrating tub from the discharge port of the pumping channel.

JP 2010-94248 A

  In the washing machine of Patent Document 1, in order to return the washing liquid collected in the washing / dehydrating tub to the washing / dehydrating tub via the pumping path, the planetary gear for transmitting torque from the rotary wing to the pumping wing. Since it is necessary to provide a mechanism separately, there is a concern about an increase in the number of parts.

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

  The present invention relates to an outer tub in which water is stored and a washing tub that is accommodated in the outer tub and has a through hole for allowing water to flow back and forth between the outer tub and accommodates laundry and is rotatable. And a water channel for pumping up water accumulated in the outer tub, a discharge port for discharging water pumped up by the water channel from above into the washing tub, and a bottom wall of the washing tub. A washing machine comprising: a blade that feeds water accumulated in the outer tub into the water channel by rotating integrally with the tub.

  Further, the present invention is characterized in that a plurality of the water channels are provided on the outer surface of the outer tub.

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

  Further, the present invention is characterized in that the receiving port is provided at the same height as the blade.

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

  Further, the present invention is characterized in that a labyrinth structure is provided to prevent water accumulated in the outer tub from escaping into a gap between the outer tub and the washing tub above the receiving port.

  Further, according to the present invention, in the outer tub, a drain outlet for discharging water in the outer tub, and an overflow outlet for causing water of a predetermined level or more in the outer tub to overflow outside the outer tub. And the water channel is disposed away from each of the drain port and the overflow port.

According to the present invention, in this washing machine, the washing tub for storing the laundry is rotatably accommodated in the outer tub. A water channel pumps up water accumulated in the outer tank. The pumped water is discharged from above into the washing tub through the discharge port. The water in the washing tub can be transferred between the washing tub and the outer tub by passing through the through hole of the washing tub.
Thereby, since water is used for washing while circulating, water saving becomes possible. Further, when washing the laundry, the detergent in the laundry tub can be foamed by the momentum of water being discharged and falling in the laundry tub, so that the laundry can be effectively washed with the foamed detergent. In addition, the water discharged from above into the washing tub can act on the laundry due to the mechanical force caused by the water drop and improve the washing power, and the laundry can be efficiently rinsed. Time can be reduced.
The bottom wall of the washing tub is integrally provided with vanes, and the water accumulated in the outer tub is fed into the water channel by rotating integrally with the washing tub. Thereby, a large amount of water in the outer tub can be fed into the water channel by the synergistic effect of the centrifugal force generated in the water in the outer tub according to the rotation of the washing tub and the blades. Therefore, the amount of water pumped up by the water channel can be increased.
Since the blades are provided integrally with the washing tub, if the blades are formed integrally with the washing tub, it is not necessary to newly provide them as separate parts. Further, since the blades rotate integrally with the washing tub, it is not necessary to provide a separate mechanism for rotating the blades independently. Therefore, the number of parts can be reduced in the configuration in which water is pumped up and discharged into the washing tub.

  Moreover, according to this invention, the water in an outer tank can be pumped up abundantly by several water channels. In addition, when the water channel is provided on the outer surface of the outer tub, the water channel can be designed more freely than when the water channel is provided in the outer tub, so the pressure and flow rate of the water pumped up by the water channel can be adjusted freely. it can.

  Further, according to the present invention, the water channel receiving port is provided in the vicinity of the bottom wall of the washing tub, so that it is in a position to directly receive the water accumulated in the outer tub. Therefore, by accepting a large amount of water in the outer tub at the receiving port, the amount of water pumped up by the water channel can be increased.

  Further, according to the present invention, the water channel receiving port is provided at the same height as the blades, and therefore is located near the blades for feeding water into the water channel. For this reason, the amount of water pumped up by the water channel can be increased by receiving a large amount of water fed by the blades at the receiving port.

  Further, according to the present invention, the water inlet is disposed between the normal direction with respect to the rotation direction of the washing tub and the tangential direction with respect to the rotation direction. Located in the flow destination. For this reason, the amount of water pumped up by the water channel can be increased by receiving a large amount of water fed by the blades at the receiving port.

  Moreover, according to this invention, it can suppress by the labyrinth structure that the water collected in the outer tub escapes to the clearance gap between the outer tub and the washing tub above the water channel receiving port. Thereby, since the water sent by the blade | wing can be efficiently received in a receiving port, without letting it escape in the clearance gap between an outer tub and a washing tub, the quantity of the water pumped up by a water channel can be increased.

  Moreover, according to this invention, a water channel is arrange | positioned away from each of a drain outlet and an overflow outlet. Thereby, the water accumulated in the outer tub is stably pumped up and discharged into the washing tub without being affected by the water flowing through the steps near the drainage port and the overflow port.

FIG. 1 is a perspective view of an internal structure of a washing machine 1 according to an embodiment of the present invention as viewed from above. FIG. 2 is a longitudinal sectional view of the internal structure of the washing machine 1. FIG. 3 is an enlarged view of a main part of FIG. 4 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a diagram in which the first modification is applied to FIG. FIG. 6 is a diagram in which the second modification is applied to FIG.

Embodiments of the present invention will be specifically described below 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 viewed from above.

  In addition, when mentioning the direction of the washing machine 1, the attitude | position of the washing machine 1 in FIG. 1 is made into a reference | standard. The vertical 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 vertical direction Z, the upper part is referred to as an upper part Z1, and the lower part is referred to as a lower part Z2. Of the left and right directions 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 vertical direction Z and the horizontal direction X is the front-rear 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 housing 2, an outer tub 3, a water channel 4, and a washing tub 5.
The housing 2 is a substantially rectangular parallelepiped hollow body, and the outer tub 3, the water channel 4, and the washing tub 5 are accommodated in the housing 2.

  The outer tub 3 is supported by the housing 2 via a plurality of suspension bars (not shown) having a spring and a damping mechanism. The outer tub 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 tub 3 is referred to as a circumferential direction S, and the radial direction of the outer tub 3 is referred to as a radial direction R. The outer tub 3 includes 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 closing the lower end of the side wall 6, and the entire region in the circumferential direction S from the upper end of the side wall 6. And an annular wall 8 projecting inward in the radial direction R. An outer peripheral surface 6 </ b> A of the side wall 6 is an outer surface of the outer tub 3. In the outer tub 3, water is stored from the bottom wall 7 side.

  An opening 9 defined by the inner peripheral edge 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 tub 3 to the upper side Z1. The annular wall 8 includes an internal space 10 extending along the circumferential direction S, and a discharge port 11 that cuts out the inner peripheral edge of the annular wall 8 along the circumferential direction S to expose the internal space 10 inward in the radial direction R. Have The annular wall 8 has a plurality of (here, four) protrusions 12. The plurality of projecting portions 12 are arranged at intervals in the circumferential direction S, and are formed so as to project in a substantially triangular shape from the outer peripheral edge portion of the annular wall 8 to the outside in the radial direction R when viewed from above Z1. Each protrusion 12 is a hollow body that constitutes a part of the internal space 10. Each of the protrusions 12 is disposed one by one at the four corners of the housing 2 formed in a substantially square shape in plan view.

  The water channel 4 is an elongated pipe made of resin, and a plurality of water channels 4 are provided on the outer peripheral surface 6A of the side wall 6 so as to have the same number (four in this case) as the protrusions 12 described above. The water channel 4 extends from the lower end of the side wall 6 of the outer tub 3 to the outside in the radial direction R in the horizontal direction H, and bends from the lower end 4A and extends upward Z1 along the outer peripheral surface 6A. The intermediate portion 4B has an upper end portion 4C extending from the intermediate portion 4B to the upper side Z1 and connected to the protruding portion 12 from the lower side Z2. The intermediate portion 4B does not need to extend linearly along the up-down direction Z, and may extend upward Z1 while being bent or bent as necessary.

  Each of the water channels 4 is arranged one by one at the four corners of the housing 2 in the same manner as the protruding portion 12. Each water channel 4 has a receiving port 13 at a connection portion between the lower end portion 4 </ b> A and the side wall 6 of the outer tub 3, and the internal space of the water channel 4 communicates with the inside of the outer tub 3 at the receiving port 13. The internal space of each water channel 4 communicates with the internal space 10 of the annular wall 8 of the outer tub 3 at the connection portion between the upper end portion 4 </ b> C and the protruding portion 12.

  The washing tub 5 is formed in a cylindrical shape having an axis extending in the vertical direction Z and is slightly smaller than the outer tub 3. The laundry is stored in the washing tub 5. The washing tub 5 has a metal side wall 20 formed in a cylindrical shape extending in the vertical direction Z, and a resin bottom wall 21 formed in a disk shape extending flat in the horizontal direction H and closing the lower end of the side wall 20; And a resin balance ring 22 attached to the upper end of the washing tub 5. A large number of through holes 23 are formed in each of the side wall 20 and the bottom wall 21.

  The balance ring 22 is an annular hollow body having an internal space in which a liquid is accommodated, and is attached coaxially to the upper end portion of the side wall 20. As will be described later, when the washing tub 5 rotates, the balance of rotation 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 peripheral edge 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 accommodated in the outer tub 3 and is arranged substantially coaxially with the outer tub 3. Therefore, the circumferential direction of the washing tub 5 is the circumferential direction S described above, and the radial direction of the washing tub 5 is the radial direction R described above. The opening 24 of the washing tub 5 communicates with the opening 9 of the outer tub 3 from below Z2. The communicating openings 9 and 24 constitute a laundry entrance 25. The user of the washing machine 1 puts the laundry in and out of the washing tub 5 through the entrance 25 from above Z1. 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 above Z 1 with a gap.

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

  FIG. 2 is a longitudinal sectional view of the internal structure of the washing machine 1. FIG. 3 is an enlarged view of a main part surrounded by a broken-line circle in FIG. 4 is a cross-sectional view taken along the line AA in FIG. In the following description, reference is mainly made to FIGS.

  The washing machine 1 includes a motor 30. The motor 30 generates torque by being electrically driven. The motor 30 is disposed in the lower portion Z <b> 2 of the bottom wall 7 of the outer tub 3 in the housing 2. The motor 30 has an output shaft 31 for outputting torque. The output shaft 31 extends from the motor 30 upward Z1. A transmission shaft 32 extending to the upper Z1 is coaxially disposed above the output shaft 31. The output shaft 31 and the transmission shaft 32 are connected to each other via a transmission mechanism 33 configured by a speed reduction mechanism or the like.

  The transmission shaft 32 extends through the circle center portion of the bottom wall 7 of the outer tub 3 and extends upward Z1. An upper end portion of the transmission shaft 32 is connected to a circular center portion of the bottom wall 21 of the washing tub 5. Torque generated by the motor 30 is transmitted to the transmission shaft 32 via the output shaft 31 and the transmission mechanism 33. Thereby, the washing tub 5 rotates with the transmission shaft 32 around the transmission shaft 32 as a rotation center. The rotation direction of the washing tub 5 coincides with the circumferential direction S.

  The washing tub 5 rotates in a state where the detergent is dissolved in the water stored in the outer tub 3, whereby the washing operation of the laundry stored in the washing tub 5 is executed. After the washing operation, the washing tub 5 rotates while being supplied to the outer tub 3, thereby rinsing the laundry stored in the washing tub 5. When the washing tub 5 rotates at a high speed while the outer tub 3 is drained, the dehydration operation of the laundry stored in the washing tub 5 is executed.

  In relation to the water channel 4, a plurality of blades 40 projecting downward Z <b> 2 are integrally provided on the lower surface 21 </ b> A of the bottom wall 21 of the washing tub 5. Each blade 40 is formed in a plate shape that is thin in the circumferential direction S and linearly extends along the radial direction R, and is arranged radially with reference to the circle center of the bottom wall 21 (see FIG. 4). These blades 40 are made of resin and are integrally formed with the bottom wall 21. These blades 40 are arranged in a gap 41 in the vertical direction Z between the bottom wall 21 and the bottom wall 7 of the outer tub 3 in a non-contact state with the outer tub 3.

  The inlet 13 at the lower end 4 </ b> A of each water channel 4 is provided in the vicinity of the bottom wall 21 of the washing tub 5. Specifically, the receiving port 13 is provided at the same height as the blade 40.

  When the washing tub 5 receives the torque of the motor 30 and rotates, the blades 40 on the bottom wall 21 of the washing tub 5 rotate integrally with the washing tub 5. As a result, the blades 40 receive the water accumulated in the outer tub 3, specifically, the water present in the gap 41 between the bottom wall 21 of the washing tub 5 and the bottom wall 7 of the outer tub 3. 13 Therefore, the water accumulated in the outer tub 3 is successively sent to the receiving port 13 of the water channel 4 by the rotating blades 40 and is received in the water channel 4 at the receiving port 13.

  The water received in the water channel 4 rises in the water channel 4 by being pushed by the subsequent water. The water that has risen to the upper end 4C of the water channel 4 flows into the internal space 10 of the annular wall 8 from the protrusion 12 (see FIG. 1) of the annular wall 8 of the outer tub 3, and as shown by the broken line arrows, 8 is discharged into the washing tub 5 from the discharge port 11 at the inner peripheral edge, and flows down in the washing tub 5 obliquely downward.

  Thus, the water channel 4 pumps up the water accumulated in the outer tub 3, and the discharge port 11 discharges the water pumped up by the water channel 4 into the washing tub 5 from above Z <b> 1. Water in the washing tub 5 passes between the washing tub 5 and the outer tub 3 by passing through the through holes 23 of the washing tub 5.

  Thereby, since water is used for washing while circulating, water saving becomes possible. The laundry in the washing tub 5 is agitated by the rotating washing tub 5 and water discharged from the upper side Z1. Further, when washing the laundry, the detergent in the washing tub 5 can be foamed by the momentum of water being discharged and falling in the washing tub 5, so that the laundry can be effectively washed with the foamed detergent. . In addition, the water discharged from the upper side Z1 into the washing tub 5 can act on the laundry due to the mechanical force caused by the water dropping, thereby improving the cleaning power and rinsing the laundry efficiently. Time required for driving can be reduced.

  As shown in FIG. 4, the water 40 accumulated in the outer tub 3 by the blade 40 integrally provided on the bottom wall 21 of the washing tub 5 rotates integrally with the washing tub 5, as indicated by a thick arrow. Feed into the receiving port 13 of the water channel 4. Thereby, a large amount of water in the outer tub 3 can be fed into the water channel 4 by the synergistic effect of the centrifugal force generated in the water in the outer tub 3 according to the rotation of the washing tub 5 and the blades 40. Therefore, the amount of water pumped up by the water channel 4 can be increased.

  Since the blade 40 is provided integrally with the washing tub 5, if the blade 40 is formed integrally with the washing tub 5 as described above, it is not necessary to provide a new separate component. Moreover, since the blade | wing 40 rotates integrally with the washing tub 5, it is not necessary to provide the mechanism for rotating the blade | wing 40 independently. Therefore, the number of parts can be reduced in the configuration in which water is pumped up and discharged into the washing tub 5.

  A plurality of water channels 4 can pump a large amount of water in the outer tub 3. Since each water channel 4 is provided on the outer peripheral surface 6A of the side wall 6 of the outer tub 3, that is, outside the outer tub 3, the water channel 4 can be freely designed as compared with the case where the water channel 4 is provided in the outer tub 3. . Therefore, the pressure and flow rate of the water pumped up by the water channel 4 can be adjusted freely. Specifically, if the water channel 4 is thickened and the internal space of the water channel 4 is expanded, the amount of water can be increased, and if the water channel 4 is narrowed and the internal space of the water channel 4 is narrowed, the water pressure can be increased.

  As shown in FIG. 3, the inlet 13 of the water channel 4 is provided in the vicinity of the bottom wall 21 of the washing tub 5, so that it is in a position to directly receive water accumulated in the outer tub 3. Therefore, by receiving a large amount of water in the outer tub 3 at the receiving port 13, the amount of water pumped up by the water channel 4 can be increased. In particular, since the receiving port 13 of the water channel 4 is provided at the same height as the blades 40, it is located near the blades 40 that feed water into the water channel 4. Therefore, the amount of water pumped up by the water channel 4 can be increased by receiving a large amount of water fed by the blades 40 at the receiving port 13.

  In order for the washing tub 5 to rotate smoothly in the outer tub 3, a gap 42 is secured between the inner peripheral surface 6 </ b> B of the side wall 6 of the outer tub 3 and the outer peripheral surface 20 </ b> A of the side wall 20 of the washing tub 5. The The gap 42 is formed in an annular shape that extends in the circumferential direction S and surrounds the washing tub 5. When the rotating blade 40 feeds the water accumulated in the outer tub 3 to the receiving port 13, it is assumed that this water tends to escape into the gap 42 in the upper portion Z <b> 1 of the receiving port 13. Therefore, a labyrinth structure 43 for preventing water from escaping to the gap 42 is provided in the washing machine 1.

  The labyrinth structure 43 includes a flat surface 44 extending outward in the radial direction R as a part of the lower end portion of the inner peripheral surface 6B of the side wall 6 of the outer tub 3. The flat surface 44 is located above the receiving port 13 at Z1. The labyrinth structure 43 includes a lateral flange 45 projecting outward in the radial direction R from the lower end portion of the outer peripheral surface 20A of the side wall 20 of the washing tub 5, and an annular shape projecting from the entire region in the circumferential direction S of the lower end of the side wall 20 downward Z2. And a vertical flange 46.

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

  The lower end of the vertical flange 46 is located above the receiving port 13 of each water channel 4 in the upper Z1. Each blade 40 is disposed so as to protrude downward Z2 from the lower end of the vertical flange 46. The outer end portion of each blade 40 in the radial direction R is located at the same position as the vertical flange 46 and is disposed so as to approach the receiving port 13 of the water channel 4 from the inner side of the radial direction R. The vertical flange 46 is opposed to the portion Z2 below the flat surface 44 on the inner peripheral surface 6B of the side wall 6 across the entire region in the circumferential direction S with a gap 48 from the inner side in the radial direction R. The gap 48 is an annular space that is thin in the radial direction R, and communicates with the inner portion of the gap 47 in the radial direction R from below Z2.

  The gaps 47 and 48 are the narrowest part in the gap between the outer tub 3 and the washing tub 5. Further, the water accumulated in the outer tub 3 first rises in the gap 48 before reaching the gap 42 in the upper Z1 of the receiving port 13 of each water channel 4, and then flows in the upper end portion of the gap 48. The gap 47 must flow in the radial direction R by changing to a substantially right angle. Thus, it is difficult for the water accumulated in the outer tub 3 to reach the gap 42 beyond the gaps 47 and 48.

  Therefore, since the water fed by the blades 40 can be efficiently received at the receiving port 13 without escaping into the gap 42 between the outer tub 3 and the washing tub 5, the amount of water pumped up by the water channel 4 is increased. Can do. When the washing tub 5 rotates, the vibration at the lower end where the gaps 47 and 48 are located in the washing tub 5 is small, so that the rotating washing tub 5 contacts the outer tub 3 even if the gaps 47 and 48 are narrow. There is no fear. On the other hand, in order to prevent the upper part with large vibration in the rotating washing tub 5 from coming into contact with the outer tub 3, the gap 42 is formed to increase stepwise toward the outside in the radial direction R toward the upper Z1. (See FIG. 2).

With reference to the water channel 4 located at the left end in FIG. 4, the receiving port 13 of each water channel 4 is arranged to face between a normal direction P with respect to the circumferential direction S and a tangential direction Q with respect to the circumferential direction S. .
That is, the receiving port 13 is disposed so as to face the inclination direction K inclined in the normal direction P and the tangential direction Q, respectively. The washing tub 5 of this embodiment rotates in one direction opposite to the direction of the receiving port 13 (counterclockwise direction in FIG. 4).

  In this case, the receiving port 13 of the water channel 4 is located at the destination of the water fed by the blades 40 that rotate integrally with the washing tub 5. Therefore, the amount of water pumped up by the water channel 4 can be increased by receiving a large amount of water fed by the blades 40 at the receiving port 13.

FIG. 5 is a diagram in which the first modification is applied to FIG.
With reference to FIG. 5, a drain port 50 for discharging water in the outer tub 3 is formed at one place in the circumferential direction S on the bottom wall 7 of the outer tub 3. A drainage channel 51 (see FIG. 2) for discharging water to the outside of the washing machine 1 is connected to the drainage port 50. An overflow port 52 is formed in the side wall 6 of the outer tub 3 at a position spaced a predetermined distance from the bottom wall 7 to the upper side Z1 to allow water above a predetermined water level in the outer tub 3 to overflow outside the outer tub 3. . An overflow channel 53 that guides water overflowing from the overflow port 52 to the drain channel 51 is connected to the overflow port 52.

  Each water channel 4 is preferably disposed away from each of the drainage port 50 and the overflow port 52. Specifically, each of the drainage port 50 and the overflow port 52 may be disposed between two adjacent water channels 4 in the circumferential direction S. More preferably, each of the drainage port 50 and the overflow port 52 may be disposed at a position separated from each of the adjacent water channels 4 by a substantially equal distance in the circumferential direction S. With such a configuration, the water accumulated in the outer tub 3 is stably pumped up and discharged into the washing tub 5 without being affected by the water flowing through the step 60 near the drain port 50 and the overflow port 52. Is done.

  FIG. 6 is a diagram in which the second modification is applied to FIG. In the embodiment and the first modification described above, each blade 40 on the lower surface 21A of the bottom wall 21 of the washing tub 5 is formed in a plate shape that is thin in the circumferential direction S and extends linearly along the radial direction R, and It arrange | positions radially on the basis of the circle center of the wall 21 (refer FIG. 4 and FIG. 5). However, as shown in FIG. 6, these blades 40 may be formed in a plate shape that is thin in the circumferential direction S and that curves and extends so as to intersect the radial direction R when viewed from below Z2. Specifically, the blades 40 are arranged in a radial direction with respect to the center of the circle of the bottom wall 21 as viewed from below Z2, and in the same direction in the circumferential direction S (in FIG. Bends in a clockwise direction.

  The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.

  For example, in the embodiment described above, the number of water channels 4 is four, but can be arbitrarily changed. Further, the shape of each water channel 4 may be different.

  The blade 40 is integrally formed with the bottom wall 21 of the washing tub 5, but may be fixed to the bottom wall 21 with a fastening member such as a screw after being molded separately from the bottom wall 21.

  As described above, when the washing tub 5 rotates in one direction opposite to the direction of the receiving port 13, the receiving port 13 of each water channel 4 has a normal direction P to the circumferential direction S and a tangent to the circumferential direction S. It arrange | positions facing between the directions Q (refer FIG. 4). In the case where the washing tub 5 does not rotate in one direction but rotates in both forward and reverse directions, the receiving port 13 may be arranged facing the normal direction P. If it does so, even if the washing tub 5 rotates forward or reverse, the receiving port 13 can receive the water sent by the blade | wing 40 equally.

  The laundry in the washing tub 5 is stirred by the rotating washing tub 5 and the water discharged from the upper side Z1 by the water channel 4, but a rotating pulsator is separately provided in the washing tub 5 for stirring the laundry. May be.

  The material of each member mentioned above is an example. For example, not all of the bottom wall 21 of the washing tub 5 may be made of resin, and the portion to which the transmission shaft 32 is connected may be made of metal.

  Although the vertical type washing machine 1 in which the rotation center of the washing tub 5 extends in the up-and-down direction Z is shown, the washing tub 5 is arranged obliquely so that the rotation center extends with an inclination with respect to the up-and-down direction Z. May be.

DESCRIPTION OF SYMBOLS 1 Washing machine 3 Outer tub 4 Water channel 5 Washing tub 6A Outer peripheral surface 11 Discharge port 13 Receiving port 21 Bottom wall 23 Through hole 40 Blade 42 Crevice 43 Labyrinth structure 50 Drain port 52 Overflow port P Normal direction Q Tangential direction S Circumferential direction Z1 Upward

Claims (7)

An outer tank where water can be stored;
A washing tub that is accommodated in the outer tub, has a through hole for allowing water to flow back and forth between the outer tub, and can accommodate and rotate laundry;
A water channel for pumping up the water accumulated in the outer tub,
A discharge port for discharging water pumped up by the water channel from above into the washing tub;
A blade that is integrally provided on the bottom wall of the washing tub, and rotates integrally with the washing tub to feed water accumulated in the outer tub into the water channel;
A washing machine comprising:   The washing machine according to claim 1, wherein a plurality of the water channels are provided on an outer surface of the outer tub.   The washing machine according to claim 1 or 2, wherein a receiving port for receiving water accumulated in the outer tub in the water channel is provided near a bottom wall of the washing tub.   The washing machine according to claim 3, wherein the receiving port is provided at the same height as the blade.   The washing machine according to claim 3 or 4, wherein the receiving port is disposed between a normal direction with respect to a rotation direction of the washing tub and a tangential direction with respect to the rotation direction.   The labyrinth structure for preventing the water collected in the outer tub from escaping into the gap between the outer tub and the washing tub above the receiving port is provided. The washing machine according to crab. In the outer tub, a drain outlet for discharging water in the outer tub, and an overflow outlet for overflowing water above a predetermined water level in the outer tub to the outside of the outer tub,
The washing machine according to any one of claims 1 to 6, wherein the water channel is disposed apart from each of the drain port and the overflow port.

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