JP2018175256A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine that circulates washing water appropriately with a simple structure.SOLUTION: The washing machine 100 includes: a bottomed cylindrical washing tub 10; an agitation blade installed on a bottom of the washing tub 10; and a plate-like circulation flow passage member 70 installed on an inner peripheral surface of the washing tub 10. The washing tub 10 comprises a convex part 11a projecting radially inward near an edge 11b of a peripheral wall of the washing tub 10. The convex part 11a has a first inclined surface K1 inclined such that a radial-direction distance with a central axis of the washing tub 10 becomes shorter toward the edge 11b of the peripheral wall in an axial direction of the washing tub 10. A discharge side of the circulation flow passage member 70 extends in the axial direction of the washing tub 10 and a tip 70a of the discharge side of the circulation flow passage member 70 is located near the convex part 11a.SELECTED DRAWING: Figure 3B

Description

  The present invention relates to a washing machine.

  There is known a washing machine which lifts and circulates washing water by rotating a stirring blade provided at the bottom of a washing tub. As such a washing machine, for example, according to Patent Document 1, "a first cover member disposed on the inner peripheral surface side of the body portion of the washing tub" and the "first cover member" And a second cover member attached from the inner peripheral side of the tank.

JP, 2009-28146, A

  However, since the washing machine described in Patent Document 1 is configured to include the first cover member, the second cover member, and the like, there is a circumstance that the structure is complicated and the manufacturing cost is increased. In addition, there is a possibility that thread waste and the like may enter the engagement portion between the first cover member and the second cover member.

  Furthermore, in the technique described in Patent Document 1, the engagement portion between the first cover member and the second cover member protrudes outward in the radial direction of the washing tub. Therefore, the width (diameter in the radial direction) of the water flow space between the above-mentioned engagement portion and the inner peripheral surface of the washing tub becomes narrow, which may lead to a decrease in the circulation flow rate of the washing water.

  Then, this invention makes it a subject to provide the washing machine which circulates a wash water appropriately by simple structure.

  In order to solve the above-described problems, a washing machine according to the present invention is installed on a bottomed cylindrical washing tub, a stirring blade installed on the bottom of the washing tub, and an inner peripheral surface of the washing tub, And a plate-like circulation passage member for guiding and discharging wash water forced to flow upward with the rotation of the agitating blade, and the washing tub includes a convex portion projecting radially inward. The convex portion is provided in the vicinity of the edge of the peripheral wall of the washing tub, and the convex portion is inclined so that the distance in the radial direction with the central axis of the washing tub becomes shorter as it is closer to the edge of the peripheral wall in the axial direction of the washing tub The discharge side of the circulation flow path member extends in the axial direction of the washing tub, and the discharge side tip of the circulation flow path member is in the vicinity of the convex portion It is characterized by being located in

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which circulates a wash water appropriately by simple structure can be provided.

It is the schematic which shows the internal structure of the washing machine which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of a washing tub etc. which a washing machine concerning an embodiment of the present invention has. It is a longitudinal cross-sectional view of a washing tub etc. which a washing machine concerning an embodiment of the present invention has. It is the elements on larger scale of the range of the broken line J shown to FIG. 3A. It is a perspective view which shows the back side of the stirring blade with which the washing machine which concerns on embodiment of this invention is equipped. It is a longitudinal cross-sectional view which shows the positional relationship of the inflow port of the circulation flow path of the washing machine which concerns on embodiment of this invention, and outer peripheral side rib and inner peripheral side rib. The washing machine which concerns on embodiment of this invention WHEREIN: It is a longitudinal cross-sectional view which shows the flow of the wash water through a circulation flow path. The washing machine which concerns on a comparative example WHEREIN: It is a longitudinal cross-sectional view which shows the flow of the wash water through a circulation flow path. In a washing tub of a washing machine concerning an embodiment of the present invention, it is a top view showing a range to which washing water is sprinkled. The washing tub which concerns on the comparative example of FIG. 6B WHEREIN: It is a top view which shows the range where a wash water is water-sprinkled.

  Hereinafter, as an example, a washing machine 100 (so-called full automatic washing machine: see FIG. 1) for washing, rinsing and dewatering will be described.

<< Embodiment >>
FIG. 1 is a schematic view showing an internal configuration of the washing machine 100 according to the embodiment.
The washing machine 100 shown in FIG. 1 is an apparatus for washing clothes, etc., and mainly comprises the washing tub 10, the stirring blades 20, the outer tub 30, the drive unit 40, the control unit 50, and the balance ring 60. (Fluid balancer), circulation flow path members 70, 80, and outer frame 90. In FIG. 1, the other circulation flow path member 80 (see FIG. 3A) is not shown.

  The washing tank 10 accommodates the laundry R, and has a bottomed cylindrical shape. The washing tub 10 is provided with a cylindrical trunk plate 11 (a peripheral wall of the washing tub 10) and a bottom plate 12 for closing the lower portion of the trunk plate 11. A plurality of dewatering holes h1 for dewatering the washing water contained in the laundry R by centrifugal force accompanying the rotation of the washing tank 10 are provided in the trunk plate 11 (in FIG. Shown).

  The stirring blade 20 (also referred to as a pulsating blade plate or a pulsator) has a substantially disk shape, and is installed at the bottom of the washing tub 10. In addition, the stirring blade 20 is rotatably supported by the drive device 40. The washing R is stirred together with the washing water by rotating the stirring blade 20 at the time of washing and rinsing.

  The outer tub 30 has a cylindrical shape with a bottom and encloses the washing tub 10 coaxially (that is, the central axes thereof are substantially the same). The outer tank 30 is suspended from the vicinity of the upper end of the outer frame 90 via a vibration damping device G such as a coil spring or elastic rubber. At the bottom of the outer tub 30, a drain ha for draining the washing water is provided. The drain ha is connected to a drain hose H1 via a drain valve V1.

  The driving device 40 is provided with a clutch (not shown) other than a motor and a reduction mechanism for rotating the stirring blade 20, and is attached to the bottom outside of the outer tub 30 via a mounting base B. At the time of washing and rinsing, the rotation of the motor is transmitted to the stirring blade 20 via the clutch, and the stirring blade 20 rotates in forward and reverse directions with the washing tub 10 kept stationary. Further, at the time of dewatering, the washing tub 10 and the agitating blades 20 are integrally rotated at high speed by driving of the motor.

The control unit 50 has a function of controlling devices such as the drive device 40 and is installed on the upper part of the outer frame 90.
The balance ring 60 is an outer annular fluid balancer in which a fluid (such as salt water) is enclosed. The balance ring 60 has a function of canceling the eccentricity by the movement of the fluid described above and maintaining the rotational balance when the eccentricity occurs due to the deviation of the laundry R or the like when the washing tub 10 rotates.

  The circulation flow path member 70 is a plate-like member for guiding and discharging upward the washing water forced to flow as the stirring blades 20 rotate, and is disposed on the inner circumferential surface of the trunk plate 11 of the washing tub 10. The details of the circulation channel member 70 will be described later.

  The outer frame 90 is a housing that accommodates the above-described members and the like, and has a box shape. The outer frame 90 is provided with a base member 91 at its lower part, and an upper surface cover 92 at its upper part. At the central portion of the upper surface cover 92, a laundry inlet hb for taking in and out the laundry R is provided, and a lid 93 which can be opened and closed is provided at the laundry inlet hb.

  Further, a gap is present between the outer circumferential surface of the washing tub 10 and the inner circumferential surface of the outer tub 30. In order to prevent the laundry R from entering the gap, a bath cover C covering the above-described gap from above is provided. In addition to the water supply hose H2 and the electromagnetic water supply valve V2, the washing machine 100 further includes a pressure-sensitive water level sensor S or the like.

  For example, when washing or rinsing is performed, the solenoid water supply valve V2 is opened by the command of the control unit 50, and the washing water is supplied into the outer tub 30 through the water supply hose H2. When it is detected based on the detection value of the water level sensor S, the control unit 50 closes the electromagnetic water supply valve V2 and the water supply is stopped. Further, when dewatering is performed, the drain valve V1 is opened by the control unit 50, and the wash water in the outer tank 30 is drained through the drain hose H1.

FIG. 2: is a longitudinal cross-sectional view of washing-tub 10 grade | etc., With which the washing machine 100 which concerns on embodiment is provided. In FIG. 2, the dewatering holes h1 (see FIG. 1) are not shown.
The bottom plate 12 shown in FIG. 2 is a plate-like member that closes the lower portion of the trunk plate 11 and is fixed to the lower end of the trunk plate 11. The bottom plate 12 includes a bottom portion 12a constituting the bottom surface of the washing tub 10, and a side portion 12b extending upward from the outer peripheral edge of the bottom portion 12a and constituting a part of the side surface of the washing tub 10. The bottom 12a is provided with a plurality of holes hc that communicate with the outer tank 30 side.

  The stirring blade 20 is a substantially disk-shaped member covering the bottom plate 12. The stirring blade 20 is formed such that the vicinity of the center in the radial direction is raised upward, and the vicinity of the peripheral edge is curved so as to undulate in the circumferential direction. In addition to the holes hd, the impeller 20 is provided with a plurality of circular dimples 21 and a plurality of radially extending ridges 22.

  As described above, the circulation flow path member 70 installed on the inner peripheral surface of the trunk plate 11 is a member for guiding the washing water forced to flow with the rotation of the agitating blade 20 upward and discharging it. The circulation flow passage member 70 has a plate shape elongated in the longitudinal direction, and is curved to the opposite side to the inner peripheral surface of the trunk plate 11 in the cross sectional view.

  Although not shown, on the back surface of the circulation flow passage member 70, a pair of longitudinally extending ribs are provided in the vicinity of both ends of the circulation flow passage member 70 in the circumferential direction. Then, when the circulation flow path member 70 is fixed to the body plate 11 by screwing, the above-described rib is abutted against the body plate 11 and is bent so as to be in close contact with the body plate 11. By this, the vicinity of both ends in the circumferential direction of the circulation flow passage member 70 can be brought into close contact with the inner peripheral surface of the trunk plate 11.

  Further, the lower end and the upper end of the circulation flow path member 70 are opened without being in close contact with the trunk plate 11. And washing is performed by rotation of the agitating blade 20 via a gap between the back surface of the circulation flow passage member 70 and the inner circumferential surface of the trunk plate 11 (hereinafter referred to as “circulation flow passage P”: see FIG. 1) Water is pumped upwards. That is, the washing water is pushed up from the bottom to the top of the washing tub 10 through the circulation flow path P, and the washing water is returned to the inside of the washing tub 10 through the discharge port he. In the present embodiment, a pair of circulation flow path members 70 are installed so as to face each other with reference to the central axis O of the washing tub 10 (see FIG. 7A).

  Further, another kind of circulation flow passage member 80 is disposed on the inner peripheral surface of the trunk plate 11 with a space of 90 ° in the circumferential direction with respect to the circulation flow passage member 70. The circulation flow path member 80 will be described with reference to FIG. 3A.

FIG. 3A is a longitudinal cross-sectional view of the washing tub 10 and the like provided in the washing machine 100 according to the embodiment. In addition, in FIG. 3A, in the washing tub 10 of the state which removed the stirring blade 20, the longitudinal cross-sectional view which looked at the circulation flow path member 80 from the front is shown.
As shown to FIG. 3A, the circulation flow path member 80 is provided with the base 81 and the lint collection part 82. As shown in FIG. The base 81 is a plate-like member that is in close contact with the inner peripheral surface of the trunk plate 11 in the vicinity of the upper end thereof and in the vicinity of both ends in the circumferential direction. Although not shown, the base 81 has an opening having a shape corresponding to the lint collecting portion 82. Further, in the vicinity of the lower end of the base 81, an inlet hf for introducing the washing water pushed away by the rotation of the stirring blade 20 is provided.

  The yarn waste collection unit 82 is a removable member for collecting yarn waste and the like, and is mounted to the opening (not shown) of the base 81 described above. The waste thread collecting portion 82 is provided with a plurality of holes hg, and a lint filter (not shown) is attached to the area of the holes hg. Further, a discharge port hi for discharging the washing water is provided above the plurality of holes hg.

  The washing water which has flowed in via the inflow port hf is pushed up via a gap between the circulation flow passage member 80 and the body plate 11 (hereinafter referred to as “circulation flow passage Q”: not shown). Then, in the process of the washing water flowing through the circulation flow path Q described above, the yarn waste and the like are collected by the yarn waste collection unit 82, and the washing water is returned to the inside of the washing tub 10 through the discharge port hi.

  It is to be noted that a slit-like discharge port may be provided in the vicinity of the upper end of the base 81 instead of providing the above-described discharge port hi in the thread waste collection portion 82. Further, in the present embodiment, a pair of circulation flow path members 80, 80 are installed so as to face each other with reference to the central axis O of the washing tub 10 (see FIG. 7A).

FIG. 3B is a partially enlarged view of the range of dashed line J shown in FIG. 3A.
As shown in FIG. 3B, the washing tub 10 is provided with a convex portion 11 a protruding radially inward in the vicinity of an edge 11 b (edge) of the peripheral wall of the washing tub 10. In addition, the convex part 11a is formed over the perimeter of the peripheral wall of the washing tub 10, and the balance ring 60 is installed above this convex part 11a.

The installation of the balance ring 60 will be described in more detail. With the balance ring 60 mounted on the convex portion 11 a, the vicinity of the edge 11 b of the peripheral wall of the washing tub 10 is bent radially inward. By such a caulking operation, the vicinity of the above-mentioned edge 11 b is brought into close contact with the upper surface of the rib 61 provided on the outer peripheral wall of the balance ring 60.
The convex portion 11a also has a function of suppressing deformation of the washing tub 10 to the outside in the radial direction by centrifugal force at the time of dewatering, and securing its strength.

  As shown to FIG. 3B, the convex-shaped part 11a has the 1st inclined surface K1. The first inclined surface K1 is closer to the edge 11b of the peripheral wall in the axial direction of the washing tub 10 (that is, as the height is higher), and the radial distance from the central axis O (see FIG. 3A) of the washing tub 10 Is inclined to be short. The first inclined surface K1 is an inclined surface for guiding wash water which is pushed upward through the circulation flow path P in an oblique direction (inward in the radial direction as the wash water rises).

  Further, the discharge side of the circulation flow path member 70 extends in the axial direction (vertical direction in FIG. 3B) of the washing tub 10. Therefore, for example, the decrease in the circulation flow rate of the washing water can be suppressed as compared with the configuration in which the vicinity of the discharge opening he of the circulation flow passage member 70 is bent radially inward (see the comparative example in FIG. 6B).

  Further, as shown by the broken line in the lateral direction of FIG. 3B, the tip 70a on the discharge side of the circulation flow path member 70 is near the convex portion 11a of the washing tub 10 (in the example shown in FIG. (Slightly below the tip) Thereby, it is possible to guide the washing water in the direction parallel to the first inclined surface K1 of the convex portion 11a while suppressing the decrease in the circulation flow rate of the washing water.

In addition, when the tip 70a on the discharge side of the circulation flow path member 70 is positioned lower than the convex portion 11a by a predetermined distance or more, the circulation flow path member 70 before the washing water reaches the convex portion 11a. The possibility of falling from the water increases.
On the other hand, when the tip 70a on the discharge side of the circulation flow path member 70 is located above the convex portion 11a by a predetermined distance or more, the distance between the balance ring 60 and the tip 70a of the circulation flow path member 70 is short. As a result, the flow path resistance is increased and the flow rate of the washing water is reduced. Therefore, as described above, it is desirable that the tip 70a on the discharge side of the circulation flow path member 70 be located in the vicinity of the convex portion 11a.

Further, the balance ring 60 has a second inclined surface K2 in the vicinity of the convex portion 11a at the lower part of the inner peripheral surface. The second inclined surface K2 is an inclined surface for guiding the washing water which has flowed out in an oblique direction along the first inclined surface K1 of the convex portion 11a in the substantially same direction. The second inclined surface K2 is substantially flush with the first inclined surface K1 of the convex portion 11a, and is located radially inward of the convex portion 11a.
The distance L1 between the second inclined surface K2 and the tip 70a of the circulation flow path member 70 is appropriately set so as not to prevent the flow of wash water pushed up through the circulation flow path P.

  Further, as shown by the broken line in the vertical direction in FIG. 3B, the second inclined surface K2 is a circulation flow path member in a longitudinal sectional view (longitudinal section in a plane including the central axis O of the washing tank 10: see FIG. 3A). It exists on the extension of 70 discharge side. As a result, the wash water pushed upward at a predetermined flow rate is discharged along the second inclined surface K2.

  Furthermore, the balance ring 60 has a diffusion surface K3 for allowing the washing water to be applied and diffused on the radially inner side of the second inclined surface K2. In the example shown in FIG. 3B, the diffusion surface K3 is a flat surface (that is, a horizontal surface) perpendicular to the central axis O of the washing tub 10. As a result, the wash water flowing out along the first inclined surface K1 and the second inclined surface K2 can be made to collide with the diffusion surface K3, and the wash water can be diffused over a wide area in the washing tub 10.

FIG. 4 is a perspective view showing the back side of the stirring blade 20 provided in the washing machine 100. As shown in FIG.
As shown in FIG. 4, the stirring blade 20 has a plurality of back vanes 23 radially extending in the radial direction from the central axis O on its back surface (bottom surface). The back vanes 23 are arranged at equal angular intervals in the circumferential direction.

  More specifically, back blade groups 23A and 23A are formed on the back surfaces of the two regions raised above the stirring blade 20 (downward in FIG. 4 showing the back side of the stirring blade 20). Each back blade group 23A is composed of five back blades 23, and is disposed in an angular range of about 90 degrees in the circumferential direction. The back blade group 23A has a function of taking in the wash water to be circulated, and a function of suppressing the bending deformation of the stirring blade 20.

  Another back blade group 23B, 23B is provided between the back blade group 23A, 23A. These back blade groups 23B and 23B are formed on the back surface of the two regions recessed below the stirring blade 20 (upward in FIG. 4 showing the back side of the stirring blade 20). The back blade group 23 </ b> B includes three back blades 23 and has a function of suppressing the bending deformation of the stirring blade 20.

  Near the center of the back surface of the stirring blade 20, three annular ribs 24 formed concentrically with the central axis O are formed. These annular ribs 24 have a function of reinforcing the back wing group 23A, 23A, 23B, 23B.

  Further, on the back surface of the stirring blade 20, outer circumferential ribs 25 and inner circumferential ribs 26 and 27 extending in the circumferential direction are formed at predetermined intervals in the radial direction. The outer circumferential rib 25 and the inner circumferential ribs 26 and 27 are curved at substantially the same curvature as that of the stirring blade 20.

  The outer circumferential rib 25 is a circumferential rib located on the outer circumferential side of the stirring blade 20. The outer peripheral rib 25 extends from the back blade 23 at one end in the circumferential direction of the back blade group 23 A to the back blade 23 at the other end, and is integrally formed with the back blade 23.

  The inner circumferential side ribs 26 and 27 are circumferential direction ribs located on the inner circumferential side with respect to the outer circumferential side rib 25. The inner ribs 26 and 27 are integrally formed with the central three back vanes 23 among the five back vanes 23 of the back vane group 23A.

  FIG. 5 is a longitudinal sectional view showing the positional relationship between the inflow port hj of the circulation flow path P of the washing machine 100 and the outer peripheral ribs 25 and the inner peripheral ribs 26 and 27. As shown in FIG. FIG. 5 is a longitudinal sectional view of the central back blade 23 included in the five back blades 23 of the back blade group 23A (see FIG. 4) as viewed from the front.

  An inlet hj for guiding the washing water to the circulation flow path P is provided on the lower side of the circulation flow path member 70 (near the bottom of the washing tub 10). Further, a gap between the inner bottom portion of the washing tank 10 and the back blade 23 of the stirring blade 20 is a pump chamber M. Then, the washing water pushed radially outward through the pump chamber M is pumped upward through the inlet hj and the circulation flow path P.

  A drooping portion 28 extending downward toward the inlet hj is formed at the outer peripheral edge of the stirring blade 20. Further, a predetermined gap hk is provided between the hanging portion 28 and the circulation flow path member 70. The dimension of the gap hk is set to such a distance that the stirring blade 20 does not contact the circulation flow path member 70.

  When the laundry R (see FIG. 1) is loaded into the washing machine 100 configured as described above, the power switch (not shown) is switched on and the start switch (not shown) is pressed. The respective devices are controlled by the control unit 50 (see FIG. 1). That is, the electromagnetic water supply valve V2 (see FIG. 1) is controlled to supply water to a predetermined water level, and the process shifts to the washing process. In the washing process, the stirring blade 20 is rotated in the order of, for example, right rotation / rest / left rotation / rest by the driving device 40 (see FIG. 1). As a result, the laundry R is stirred together with the washing water, and the laundry R is cleaned.

<Operation and effect>
FIG. 6A is a longitudinal cross-sectional view showing the flow of wash water through the circulation flow path P in the washing machine 100 according to the embodiment. In addition, the magnitude of the white arrow has shown the magnitude of the flow volume of the washing water which flows through the circulation flow path P (same as FIG. 6B).
The washing water rising via the circulation flow path P is inclined along the first inclined surface K1 of the convex portion 11a and the second inclined surface K2 of the balance ring 60 in the vicinity of the discharge opening he (washing water As it ascends, it is guided in the radially inward direction). Then, when the washing water collides with the diffusion surface K3 of the balance ring 60, the washing water is directed radially inward, and the washing water is sprinkled over a wide area in the washing tub 10 in plan view.

  As described above, the discharge side of the circulation flow path member 70 extends in the axial direction to the vicinity of the convex portion 11 a. That is, on the discharge side of the circulation flow path member 70, the flange 71A (see FIG. 6B) as in the comparative example described below is not provided. Therefore, since the circulation flow path member 70 hardly interferes with the flow of the washing water (the flow velocity decreases), a sufficient circulation flow rate can be secured without excessively increasing the rotational speed of the stirring blade 20 (see FIG. 5). .

FIG. 6B is a longitudinal cross-sectional view showing the flow of wash water through the circulation flow path P in the washing machine according to the comparative example.
The comparative example shown in FIG. 6B is different from the present embodiment (see FIG. 6A) in that a flange 71A is provided in the vicinity of the discharge port hm of the circulation flow path member 70A. In the flange 71A, the vicinity of the tip on the discharge side of the circulation flow path member 70A is a portion bent radially inward. Further, the comparative example is different from the present embodiment in that the second inclined surface K2 (see FIG. 6A) is not provided below the balance ring 60A.

  In the configuration shown in FIG. 6B, the wash water pushed upward through the circulation flow path P is directed radially inward through the gap between the collar 71A and the balance ring 60A. Here, the gap between the flange 71A and the balance ring 60A has a narrow width in the longitudinal direction, and the flow path resistance is relatively large, so there is a high possibility that the flow rate of the washing water will be reduced.

  By the way, if the height of the flange 71A is lowered, the possibility of the washing water entering the gap between the flange 71A and the balance ring 60A becomes high, and the laundry R strikes the flange 71A and becomes easily damaged.

  On the other hand, in the embodiment shown in FIG. 6A, since the discharge side of the circulation flow path member 70 extends in the axial direction, the wash water flow path is opened near the tip of the circulation flow path member 70. Therefore, the circulation flow path member 70 hardly interferes with the flow of wash water.

  For example, the distance L1 (the distance between the tip 70a of the circulation flow path member 70 and the second inclined surface K2) shown in FIG. 3B is the distance L2 (the distance between the flange 71A and the balance ring 60A) shown in FIG. It is assumed that they are the same, and the rotational speed of the stirring blade 20 (see FIG. 2) is also the same. Even in such a case, the circulation flow rate of the wash water is larger in the present embodiment than in the comparative example. As described above, the wash water flow path is open near the tip 70 a (see FIG. 3B) of the circulation flow path member 70.

  In addition, washing water is washed away along the first inclined surface K1 of the convex portion 11a and the second inclined surface K2 of the balance ring 60, and collides vigorously with the diffusion surface K3 of the balance ring 60. As a result, the washing water is sprinkled over a wide range in the washing tub 10 in plan view.

  Moreover, this embodiment is not a complicated structure like the above-mentioned patent document 1, but is a simple structure, and according to the shape of the washing tub 10, the circulation flow path member 70, and the balance ring 60, predetermined washing water is given. It is designed to guide you. Furthermore, it is not necessary to separately provide a flow straightening rib (not shown) for guiding the washing water in a predetermined direction on the inner circumferential surface of the washing tub 10. By this, the effort and cost which manufacture of the washing machine 100 requires can be reduced. In addition, thread waste and the like can be prevented from entering the gap of the circulation flow path member 70.

FIG. 7A is a plan view showing a range in which washing water is sprayed in the washing tub 10 of the washing machine 100 according to the embodiment. In FIG. 7A, illustration of the balance ring 60 is omitted (the same applies to FIG. 7B).
As described above, in the present embodiment, the washing water is sprinkled to the washing tub 10 through the discharge port he without the flow velocity of the washing water falling almost. As a result, since the distance in which the wash water is sprayed is longer than that of the comparative example (see FIG. 6B), the wash water is sprayed over substantially the entire area of the washing tub 10 (the shaded area U) in plan view. As a result, since the washing water is sprinkled like a shower from above the laundry R (see FIG. 1), it is possible to reduce uneven washing at the time of washing etc. and to improve the washing performance.

FIG. 7B is a plan view showing a range in which washing water is sprayed in the washing tub 10A of the washing machine according to the comparative example of FIG. 6B.
In the configuration of the comparative example (see FIG. 6B), as described above, the flow velocity of the washing water is reduced in the gap between the collar 102 and the balance ring 60A. As a result, as shown in FIG. 7B, there is a region where the washing water is not sprayed in plan view. Specifically, there is a high possibility that the washing water will not be sprayed in a linear gap (a gap between the shaded areas U1 and U2) connecting the circulation flow path members 80 and 80.

  On the other hand, according to the present embodiment, as described above, the washing water discharged from the discharge port he (see FIG. 7A) is sprayed to substantially the entire area of the washing tub 10 in plan view. Therefore, the washing water can be properly circulated through the circulation flow path P (see FIG. 6A).

«Modification»
As mentioned above, although the washing machine 100 which concerns on this invention was demonstrated by embodiment, this invention is not limited to these description, A various change can be made.
For example, in the embodiment, the configuration in which the balance ring 60 includes the second inclined surface K2 (see FIG. 3B) and the diffusion surface K3 (see FIG. 3B) has been described, but the present invention is not limited thereto. That is, the balance ring 60 may not include one or both of the second inclined surface K2 and the diffusion surface K3. Even with such a configuration, the wash water can be appropriately circulated through the circulation flow path P (see FIG. 3B) with a simple configuration. Further, instead of the balance ring 60, for example, an annular frame may be provided.

  Moreover, although embodiment demonstrated the structure which the 1st inclined surface K1, the 2nd inclined surface K2, and the diffusion surface K3 exhibit linear form in a longitudinal cross sectional view (refer FIG. 3B), it does not restrict to this. That is, at least one of the first inclined surface K1, the second inclined surface K2, and the diffusion surface K3 may have a curved shape in the longitudinal sectional view.

  In the embodiment, although the configuration in which the second inclined surface K2 is present on the extension of the discharge side of the circulation flow passage member 70 in the longitudinal cross-sectional view has been described (see FIG. 3B), the present invention is not limited thereto. For example, the intersection of the extension line on the discharge side of the circulation flow path member 70 and the balance ring 60 in the longitudinal cross-sectional view may be radially inward of the second inclined surface K2.

Moreover, although the above-mentioned embodiment demonstrated the structure provided with two circulation flow-path members 70 and 70, and another two types of circulation flow-path members 80 and 80 (refer FIG. 7A), these each members The number of may be changed as appropriate.
Moreover, although embodiment demonstrated the washing machine 100 which wash | cleans, rinses, and spin-dry | dehydrates, it does not restrict to this. For example, the embodiment can be applied to a washer / dryer that performs drying as well as washing, rinsing, and dewatering.

In addition, the embodiments are described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. In addition, it is possible to add, delete, and replace other configurations for part of the configurations of the embodiment.
Further, the mechanisms and configurations described above indicate what is considered to be necessary for the description, and not all the mechanisms and configurations of the product are necessarily shown.

100 washing machine 10 washing tub 11 trunk plate (peripheral wall)
11 a convex portion 11 b edge 12 bottom plate 20 stirring blade 30 outer tank 40 driving device 50 control unit 60 balance ring (fluid balancer)
70 circulation passage member 70a tip K1 first inclined surface K2 second inclined surface K3 diffusion surface O central axis P circulation passage

Claims (4)

With a bottomed cylindrical laundry tub,
A stirrer installed at the bottom of the washing tub;
And a plate-like circulation passage member disposed on the inner circumferential surface of the washing tub and guiding wash water, which is washed away with the rotation of the stirring blade, upward.
The washing tub is provided with a convex portion projecting radially inward near an edge of a circumferential wall of the washing tub,
The convex portion has a first inclined surface which is inclined such that a distance in a radial direction from a central axis of the washing tub becomes shorter as it is closer to an edge of the peripheral wall in an axial direction of the washing tub.
The discharge side of the circulation flow path member extends in the axial direction of the washing tub,
The discharge side tip of the circulation flow path member is located near the convex portion. The apparatus further includes an outer annular fluid balancer disposed on the upper side of the convex portion and in which the fluid is enclosed.
The washing machine according to claim 1, wherein the fluid balancer has a second inclined surface which is substantially flush with the first inclined surface radially inward of the convex portion. The washing machine according to claim 2, wherein the second inclined surface is present on an extension of the discharge side of the circulation flow path member in a longitudinal sectional view in a plane including the central axis. The washing machine according to claim 2 or 3, wherein the fluid balancer has a diffusion surface which applies washing water to itself and diffuses the washing water radially inward of the second inclined surface.

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