JP7290603B2 - washing machine - Google Patents

Description

The present invention relates to a washing machine for washing laundry.

Patent Document 1 describes a washing machine that secures detergency while suppressing cloth damage and cloth entanglement.

In Patent Document 1, when a second washing course different from the standard course is selected, water is supplied to a set water level higher than that of the standard course, and the water level is low by rotating the agitating blade to perform washing. Since there is no need to stir when washing, the risk of the laundry rubbing against the stirring blade is reduced, enabling washing with less damage, tangling, and loss of shape.

[Patent Document 1] JP 2017-192409 A (paragraph 0115, FIG. 14, etc.)

In conventional washing machines, when the washing tub is fixed and the stirring blades are rotated for washing, the laundry (clothes made of delicate materials, clothes that easily lose their shape, fashionable clothes, etc.), the stirring blades, and the washing tub Rubbing occurs between them, and damage to the fabric, entanglement of the fabric, shrinkage, loss of shape, etc. may become extremely large.

In the control of Patent Literature 1, as a result, the stirring blades are moved, so it is difficult to eliminate the risk of rubbing between the laundry and the stirring blades.

In order to further reduce the risk of rubbing between the laundry and the agitating blade than in the control of Patent Document 1, the agitating blade is not rotated and only the washing tub is rotated at a low speed to perform washing, and the clothes and the washing liquid are washed with the rotation of the laundry. There is a washing means that rotates together, but with only this, there is a problem that the clothes are less likely to receive water resistance and the washing efficiency is poor. For example, with woolen clothes, the laundry floats on the surface of the water, so the washing liquid may not penetrate the clothes sufficiently. It is desirable to press down and wash, and in order to improve washing efficiency, the number of parts such as a washing cap may be increased.

An object of the present invention is to provide a washing machine which is easy to use, without increasing the number of parts, for clothes which have high buoyancy and hardly absorb water in washing liquid while suppressing damage, entanglement and shrinkage of the clothes in the laundry. That is.

The present invention that solves the above problems has a washing tub, an agitating blade provided at the bottom of the washing tub, a driving device that rotates the washing tub and the agitating blade, and a water supply means that supplies water to the washing tub, A washing machine for performing a washing process, a rinsing process, and a dehydration process, comprising a circulation channel for circulating water at the bottom of the washing tub by sprinkling water into the washing tub, and performing washing from a water supply means during the washing process. washing clothes by stepwise increasing the amount of water supplied to the tub to raise the water level step by step, and lowering the number of revolutions of the washing tub step by step as the water level rises; The stirring blade has a first inner peripheral rib, a second inner peripheral rib, and an outermost outer peripheral rib on the back surface side, respectively. The side rib and the outer peripheral rib are located on the outer peripheral side of the half radius position of the stirring blade, and the tips of the first inner peripheral rib and the second inner peripheral rib are located on the outer peripheral side. The tip of the first inner rib is located above the tip of the rib, the tip of the first inner rib is located below the tip of the second inner rib, and the tip of the outer rib is located above the tip of the circulating flow. It is positioned above half the height of the entrance of the channel and below the height of the entrance .

According to the present invention, it is possible to provide a washing machine that is easy to use, without increasing the number of parts, without increasing the number of parts, while suppressing damage, entanglement, and shrinkage of clothes in the laundry, and for clothes that have high buoyancy and are difficult to absorb water in the washing liquid. .

It is a schematic diagram showing the internal configuration of the washing machine of the present embodiment. It is a longitudinal section showing an internal configuration of a washing tub concerning this embodiment. Fig. 3 is a cross-sectional view showing the inside of the washing tub from which the stirring blades have been removed; It is a perspective view showing the back side of the stirring blade. FIG. 5 is a cross-sectional view showing the positional relationship between the inlet of the circulating water channel and radial ribs; It is a perspective view which shows the back side of the stirring blade as a comparative example. It is the figure which showed the flow of the water by the circumferential direction rib. It is the figure which showed the image of shower diffusion. It is the figure which showed the outline which shows an operation panel. 4 is a flow chart showing a process operation of a cleaning method according to a standard course; 4 is a flow chart showing a process operation of a cleaning method according to a dry course; It is a flowchart which shows process operation|movement of the washing method which concerns on a fashionable course. It is a figure which shows the relationship between the rotation speed of a washing tub, and the water level rise accompanying it. It is the figure which showed the change of the water level in a washing tub in a washing process, and the rotation speed change of a washing tub. It is a figure which shows the relationship between the movement of the washing tub 2 in the washing process of a present Example, and the movement of clothes.

EMBODIMENT OF THE INVENTION Hereinafter, the form (henceforth "embodiment") for implementing this invention is demonstrated in detail, referring drawings suitably. In the following description, a washing machine capable of washing, rinsing, and dehydration (so-called fully automatic washing machine) will be described as an example. , vertical type washing and drying machines).

FIG. 1 is a schematic diagram showing the internal configuration of the washing machine of this embodiment.

As shown in FIG. 1, the washing machine 1 includes a substantially box-shaped outer frame (housing) 5 made of steel, a washing tub 2, a stirring blade 3 provided at the bottom of the washing tub 2, and washing water circulating. and a circulating water channel R that allows the water to flow.

The washing tub 2 has a cylindrical shape with a bottom, and includes a body plate 21, a bottom plate 22 provided at the bottom of the body plate 21, a balance ring 23 provided at the top of the body plate 21, and the like.

The stirring blade 3 (also referred to as a pulsating blade disk or a pulsator) is formed in a substantially disk shape and provided at the bottom of the washing tub 2 . Further, the stirring blade 3 is rotatably supported by a driving device 6 . Thus, the washing water can be stirred together with the laundry 12 by rotating the stirring blade 3 during washing and rinsing.

The circulation water channel R is provided on the wall surface of the washing tub 2, and the rotation of the stirring blade 3 pushes the washing water (water) from the bottom of the washing tub 2 to the top of the washing tub 2 and returns it to the inside of the washing tub 2. configured to circulate. Moreover, the circulating water channel R is provided at a plurality of locations on the wall surface of the washing tub 2 .

The washing machine 1 also includes an outer tub 7 coaxially enclosing the washing tub 2 in the frame body of the outer frame 5 . The outer tank 7 is made of synthetic resin and formed in a cylindrical shape with a bottom. A drain valve 13 and a drain hose 11 are provided outside the bottom of the outer tank 7 , and the drain hose 11 is connected to the drain port 7 a provided at the bottom of the outer tank 7 via the drain valve 13 .

The washing machine 1 also includes a control unit 19 as control means, an electromagnetic water supply valve 16 as water supply means, a pressure-sensitive water level sensor 15 for detecting the water level, and the like. When the washing process or the like is performed, the control unit 19 commands to open the electromagnetic water supply valve 16 to supply washing water into the outer tub 7 . When the water level sensor 15 detects that the water level has reached a predetermined level, the electromagnetic water supply valve 16 is closed by a command from the control unit 19 to stop the water supply. Also, when performing the dehydration process, etc., the drain valve 13 is opened by a command from the control unit 19, and the washing water in the outer tub 7 is drained out of the washing machine 1 from the other end of the drain hose 11.

A synthetic resin top cover 9 is provided on the upper portion of the outer frame 5 , and a synthetic resin base member 10 is provided on the lower portion of the outer frame 5 . In addition, the central portion of the top cover 9 has a laundry loading slot 9a for loading and unloading the laundry 12, etc., and a lid 9b for opening and closing the laundry loading slot 9a is provided. A water supply hose connection port 17 is provided at the rear portion of the top cover 9 to be connected to a water faucet. The water supply hose connection port 17 is connected to the electromagnetic water supply valve 16 .

In addition, there is a gap between the inner circumference of the outer tub 7 and the outer circumference of the washing tub 2, and the upper end of the outer tub 7 is designed to prevent the laundry from entering this gap and to maintain the rigidity of the outer tub 7 as a whole. is provided with a tank cover 18 for covering the upper surface of the balance ring 23 .

The driving device 6 is attached to the outside of the bottom of the outer tub 7 via a steel plate attachment base 14 . Further, the driving device 6 is configured to drive the stirring blades 3 via a driving motor and a reduction mechanism. This driving device 6 has a stirring mode in which the stirring blades 3 are rotated in both forward and reverse directions with the washing tub 2 stationary or fixed in rotation, and a dehydration mode in which the washing tub 2 and the stirring blades 3 are integrally rotated in the same direction. can be selectively driven.

In addition, the driving device 6 rotates the stirring blade 3 forward and backward in a state in which the washing-tub 2 is not stationary (a state in which the rotation of the washing-tub 2 is not fixed, but the washing-tub 2 cannot be directly rotated by the driving device 6). The modes are also configured to be selectively drivable.

FIG. 2 is a longitudinal sectional view showing the internal configuration of the washing tub according to this embodiment. 2, illustration of the dewatering holes 21a (see FIG. 1) is omitted.

As shown in FIG. 2, the body plate 21 is formed by forming a stainless steel plate into a cylindrical shape, and the washing water contained in the laundry 12 is separated from the laundry 12 by centrifugal force on the peripheral wall and discharged. are formed with a plurality of dewatering holes 21a (see FIG. 1, only a portion of which is shown).

A circulation channel member 24 forming a circulation channel R is attached to the body plate 21 . The circulation channel member 24 is formed of a substantially plate-like member such as a synthetic resin, and is configured to extend vertically with a predetermined width.

A circulation channel member 25 that constitutes the circulation channel R is attached to the body plate 21 at a position different from the circulation channel member 24 . A detachable lint collecting member 26 is attached to the circulation channel member 25 . The lint collecting member 26 is formed with a plurality of openings 26a, and a lint filter (not shown) is provided in the area where the openings 26a are arranged.

The bottom plate 22 is made of synthetic resin and is a dish-shaped member that closes the lower part of the body plate 21. The bottom plate 22a constitutes the bottom surface of the washing tub 2, and the side extending upward from the outer peripheral edge of the bottom portion 22a constitutes the side surface. and is fixed to the lower end of the body plate 21 . A plurality of through holes 22c communicating with the bottom of the outer tub 7 are formed in the bottom portion 22a.

The balance ring 23 is formed in a ring shape from synthetic resin or the like, and is fixed to the upper end portion (upper edge portion) of the body plate 21 . The balance ring 23 is arranged so as to protrude radially inward from the inner wall surface of the body plate 21 , and the inner diameter of the balance ring 23 is configured to be smaller than the inner diameter of the body plate 21 . In addition, the balance ring 23 is configured by enclosing a fluid with a large specific gravity (salt water, etc.) inside, and when eccentricity occurs due to the bias of the laundry when the washing tub 2 rotates, the eccentricity is canceled by the movement of the fluid. , has the function of maintaining rotational balance.

The agitating blade 3 has a substantially disc shape having a diameter that covers the inside of the bottom plate 22 (the inner bottom of the washing tub 2). It is configured. Further, the stirring blade 3 is formed so that a part of the peripheral portion is curved upward. The stirring blade 3 is formed with a plurality of holes 3a passing through the front side and the back side, and a plurality of circular dimples 3b and radially extending ridges 3c are formed at a plurality of positions.

FIG. 3 is a cross-sectional view showing the inside of the washing tub from which the stirring blade is removed. 3 is a cross-sectional view of the lint collecting member 26 viewed from the front.

As shown in FIG. 3 , the circulation channel member 24 has an upper end 24 a extending to the vicinity of the balance ring 23 and a lower end 24 b extending to a position where it enters the recess of the bottom plate 22 . In addition, the upper end 24a of the circulation flow path member 24 is formed with a flange portion 24a1 that is integrally formed by bending resin radially inward. The tip of the flange portion 24a1 is set at a position that does not protrude radially inward from the balance ring 23. As shown in FIG. In addition, a flange portion 24b1 that is integrally bent from resin and fitted to the bottom plate 22 is formed on the lower end 24b of the circulation flow path member 24 so as to protrude radially inward.

Further, a water conduit 24c integrally formed of resin is formed on the back surface of the circulation channel member 24, and the circulation channel R is formed between the circulation channel member 24 and the inner wall surface 21b of the body plate 21. there is That is, a pair of ribs (not shown) that are spaced apart in the left-right direction (circumferential direction) are formed on the back surface of the circulation channel member 24 so as to protrude toward the body plate 21, and the circulation channel member A fixing portion (not shown) is provided for fixing 24 to body plate 21 . A packing (not shown) is attached to the ribs and brought into close contact with the inner wall surface of the circulation flow path member 24 , and the circulation flow path member 24 is fixed to the body plate 21 via the fixing portion, so that the water flows in from the inlet 27 . Washing water can flow up to the upper end of the circulation channel member 24 without leaking in the middle.

Further, on the back surface of the circulation channel member 25 on which the lint collecting member 26 is provided, a water conduit (not shown) integrally formed of resin is formed. A circulating water channel (not shown) is formed with the wall surface (not shown). The circulation channel member 25 of the present embodiment does not have the circulation channel R formed up to the upper end of the washing water, but the washing water is sprinkled into the washing tub 2 from the opening 26a of the lint collecting member 26. This is what circulates. In addition, it is not limited to the circulation channel member 25 having such a configuration, and a slit-shaped discharge port for discharging washing water is provided above the lint collecting member 26 of the circulation channel member 25. can be anything.

An inlet (inlet) 27 for introducing washing water into the circulation channel R is provided at the bottom of the washing tub 2 located below the circulation channel member 24 in the vertical direction. The bottom plate 22 provided with the inlet 27 is curved to have an R shape from the bottom portion 22a to the side portion 22b. As a result, the direction of the flow of washing water can be smoothly changed to the circulating water path R extending in the vertical direction. Further, the height dimension H of the inlet 27 is the length until a straight line extending downward in the vertical direction from the lower surface of the flange portion 24 b 1 touches the bottom plate 22 . The height position Hm (see FIG. 5) of the inlet 27 is the height of the lower surface of the flange portion 24b1, in other words, the height of the upper end of the inlet 27. As shown in FIG.

A discharge port 31 is formed at the upper end of the circulating water channel R so as to open upward in the vertical direction. The discharge port 31 is arranged so as to face the lower surface 23 a of the balance ring 23 . As a result, the washing water discharged from the discharge port 31 collides with the lower surface 23a of the balance ring 23, and the washing water is directed into the washing tub 2 through the gap 32 formed between the flange portion 24a1 and the lower surface 23a. It is designed to be discharged (sprinkled) at the same time.

An inlet (introduction port) 28 (see FIG. 3) for introducing washing water into the circulation channel is formed at the bottom of the washing tub 2 located below the circulation channel member 25 in the vertical direction. there is Washing water introduced from the inlet 28 passes through a water conduit (not shown) formed between the circulation channel member 25 and the body plate 21 and is introduced into the lint collecting member 26 to remove the lint. After being collected, water is sprayed into the washing tub 2 from the opening 26a.

FIG. 4 is a perspective view showing the back side of the stirring blade.

As shown in FIG. 4 , a plurality of rear blades 33 (radial ribs) extending in the radial direction D from the center O of the rotation shaft are formed on the rear surface (lower surface) of the stirring blade 3 . In other words, the rear blades 33 are radially formed from the rotation axis center O. As shown in FIG. The rear blade 33 has a plate shape and is formed so as to protrude downward (upward in FIG. 4) in the vertical direction from the rear surface of the stirring blade 3 . Further, the rear blades 33 are arranged in the circumferential direction W at substantially equal angles.

In the present embodiment, rear blade groups 33A, 33A are formed on the rear surfaces of the two regions that rise above the stirring blade 3 (see FIG. 2). Thereby, a large amount of water to be taken in between the back blades 33 can be ensured. Each rear blade group 33A is composed of five rear blades 33 and arranged in an angular range of approximately 90 degrees. The back blade group 33A not only functions to take in the circulated washing water, but also functions as a reinforcing member that suppresses bending deformation of the stirring blade 3 when the laundry 12 is thrown into the washing tub 2.

Rear blade groups 33B, 33B are formed in a region between the rear blade group 33A and the rear blade group 33A. The rear blade group 33B is formed on the rear surfaces of two regions recessed below the stirring blade 3 (see FIG. 2). The rear blade group 33B is composed of three rear blades, which are arranged within an angular range of approximately 90 degrees. The rear blade group 33B mainly functions as a reinforcing member that suppresses bending deformation of the stirring blade 3. As shown in FIG.

Annular ribs 34, 34, 34 are formed concentrically or substantially concentrically with the central axis O of rotation on the central side of the back surface of the stirring blade 3 (a region of about half the radius). ing. Thereby, the stirring blade 3 and the back blade groups 33A, 33A, 33B, 33B can be reinforced.

Further, on the rear surface (lower surface) of the stirring blade 3, an outer peripheral rib 35 and inner peripheral ribs 36, 37 extending in the circumferential direction W are formed at intervals in the radial direction D. As shown in FIG. In addition, the outer peripheral rib 35 and the inner peripheral ribs 36 and 37 are curved with substantially the same curvature as the stirring blade 3 .

The outer peripheral side rib 35 is a circumferential rib located on the outer peripheral side, and extends from the back blade 33 at one end in the circumferential direction W of the back blade group 33A to the back blade 33 at the other end, and is formed by all the back blades 33 and the resin. integrally formed. Further, the outer peripheral rib 35 is located on the tip side of each rear blade 33 of the rear blade group 33A. Note that the tip side of the back blade 33 means the end portion on the outer peripheral side of the back blade 33 or the vicinity of the end portion on the outer peripheral side of the back blade 33 .

The inner peripheral ribs 36 and 37 are circumferential ribs located on the inner peripheral side of the outer peripheral rib 35 , and are configured so that the inner peripheral rib 36 is positioned on the outer peripheral side of the inner peripheral rib 37 . there is Further, the inner peripheral ribs 36 and 37 are shorter in vertical direction than the outer peripheral rib 35 . In addition, the inner peripheral rib 36 is formed to be longer in the vertical direction than the inner peripheral rib 37 .

The inner peripheral side ribs 36 and 37 are formed integrally with the central three rear blades 33 of the five rear blades 33 of the rear blade group 33A.

FIG. 5 is a cross-sectional view showing the positional relationship between the inlet of the circulating water channel and radial ribs. In addition, FIG. 5 shows a cross-sectional view when the central rear blade 33 of the five rear blades 33 of the rear blade group 33A is cut so as to face the front.

As shown in FIG. 5, the surface of the stirring blade 3 has a slightly raised central portion, and has an inclined surface 3d rising from the position of the annular rib 34 toward the outer peripheral side (outside in the radial direction). there is At the position shown in FIG. 5 , the outer peripheral edge of the stirring blade 3 is located above the upper end 22 d of the bottom plate 22 . A drooping portion 3 e extending toward the inlet 27 is formed on the outer peripheral edge of the stirring blade 3 . The tip (lower end) of the drooping portion 3e is positioned above the inlet 27 (flange portion 24b1) and is configured to form a gap S with the surface of the circulation channel member 24. As shown in FIG. The dimension of this gap S is set to the minimum distance at which the stirring blade 3 does not come into contact with the circulation channel member 24 during operation.

The outer peripheral rib 35 and the inner peripheral ribs 36 and 37 extend toward the bottom portion 22a of the bottom plate 22 positioned below and are formed parallel to each other. Further, the outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37 are located on the outer peripheral side of the half (half) of the radius of the stirring blade 3 .

The tip (lower end) 35a of the outer peripheral rib 35 is located closer to the bottom 22a than the height Hm of the inlet 27 of the circulating water channel R (the lower surface of the flange 24b1). In other words, the tip (lower end) 35a of the outer peripheral rib 35 is located below the upper end (height position Hm) of the inlet 27, and the inlet 27 and the outer peripheral rib 35 are aligned when viewed from the radial direction. It is configured so that it overlaps at the part. Further, the tip (lower end) 35a of the outer peripheral rib 35 is located above the half height position of the height dimension H of the inlet 27. As shown in FIG. As a result, the amount of wash water escaping from the gap S can be suppressed, and a decrease in the flow rate of the wash water introduced into the inlet 27 can be suppressed.

Tip ends (lower ends) 36a and 37a of the inner peripheral ribs 36 and 37 are positioned farther from the bottom portion 22a than the tip end (lower end) 35a of the outer peripheral rib 35 is. In other words, the tips (lower ends) 36 a and 37 a of the inner ribs 36 and 37 are located above the tips (lower ends) 35 a of the outer rib 35 . Further, the tip (lower end) 36a of the inner peripheral rib 36 is located closer to the bottom 22a than the tip (lower end) 37a of the inner peripheral rib 37 is.

A boss 3f is provided at the center O of the rotating shaft of the stirring blade 3 and connected to the rotating shaft 6a of the driving device 6 (see FIG. 1). The boss 3f is formed on the back surface of the stirring blade 3 so as to protrude downward. When the tip (lower end) of the boss 3f is the reference position Hs, the height of the tip 35a of the outer rib 35 is H1, the height of the tip 36a of the inner rib 36 is H2, and the inner rib Assuming that the height dimension of the tip 37a of 37 is H3, the relationship is H1<H2<H3.

In addition, the length of the outer circumferential rib 35 in the vertical direction from the back surface of the stirring blade 3 is set to be longer than half (half) of the length from the back surface to the reference position Hs. In addition, the length of the inner circumferential ribs 36 and 37 in the vertical direction from the back surface of the stirring blade 3 is set to be half (1/2) or less of the length from the back surface to the reference position Hs.

In the washing machine 1 provided with such a circulation channel member 24, the pump formed by the inner peripheral side of the bottom plate 22 (the inner bottom of the washing tub 2) and the back blade 33 provided on the back surface of the stirring blade 3 The chamber P (see FIG. 1) is configured to communicate with the circulation water channel R.

In the washing machine 1 configured as described above, for example, when the laundry 12 is put into the washing tub 2, the power switch is turned on, and the start switch (not shown) is turned on, the control unit 19 commands the electromagnetic water supply. The valve 16 is controlled to supply water up to a predetermined water level, and the washing (washing) process is started. In the washing process, the motor of the driving device 6 is controlled by the control unit 19 to rotate clockwise, rest, counterclockwise, and rest according to the washing water flow. The rotation of the motor of the driving device 6 thus controlled is transmitted to the agitating blade 3, the agitating blade 3 and the back blade 33 are rotated, the laundry 12 and the washing water in the washing tub 2 are agitated, and the laundry 12 is is washed. The rotational speed of the motor of the driving device 6 is set to 90 to 150 rpm, for example.

On the other hand, the washing water on the back side of the stirring blade 3 is pushed out by centrifugal force due to the rotation of the back blade 33 due to the rotation of the stirring blade 3, is pushed up in the circulation water channel R, and is intermittently directed upward from the discharge port 31. is discharged to The washing water discharged from the discharge port 31 collides with the lower surface 23 a of the balance ring 23 , so that the direction of the washing water is changed to the inside of the washing tub 2 and intermittently poured into the washing tub 2 . In addition, when the washing water is pushed out to the circulation channel R by the back blade 33 of the stirring blade 3, after that, new washing water is supplied from the through hole 22c (see FIG. 2) leading to the outer tub 7 provided in the bottom portion 22a of the bottom plate 22. be done.

FIG. 6 is a perspective view showing the back side of a stirring blade as a comparative example. The stirring blade 100 of the comparative example and the stirring blade 3 of the present embodiment differ in the shape of the circumferential rib, and the shape of the surface of the other stirring blade 3, the shape of the back blade 33 and the annular rib 34 are the same. be. In addition, in the stirring blade 100, the same reference numerals are assigned to the same components as the stirring blade 3, and redundant description is omitted.

As shown in FIG. 6, the stirring blade 100 has circumferential ribs 101 and 102 . The circumferential rib 101 is formed at the same position as the inner circumferential rib 36 of this embodiment, and the circumferential rib 102 is formed at the same position as the inner circumferential rib 37 of this embodiment. In addition, the circumferential ribs 101 and 102 are formed longer in the vertical direction than the inner circumferential ribs 36 and 37 of the present embodiment. Tip ends 101a and 102a of circumferential ribs 101 and 102 are positioned closer to bottom 22a than tips 36a and 37a of inner ribs 36 and 37 of this embodiment.

FIG. 7 shows the flow of water by circumferential ribs, (a) of this embodiment and (b) of a comparative example. In addition, the size of the white arrow indicates the size of the flow rate of the washing water flowing through the circulating water path R.

First, the comparative example shown in FIG. 7B will be described. In addition, the tip 101 a of the circumferential rib 101 is located below half (one-half) of the height dimension H of the inlet 27 . Further, the tip 102a of the circumferential rib 102 is positioned closer to the bottom 22a than the tip 101a of the circumferential rib 101 is.

In the comparative example of FIG. 7B, the wash water is held between the adjacent back blades 33, and when the stirring blade 100 rotates in this state, an outward centrifugal force acts on the wash water. At this time, the washing water in the lower portion of the space Q10 positioned between the outermost annular rib 34 and the circumferential rib 102 flows, as indicated by the outline arrow Y10, into the tip 102a of the circumferential rib 102 and the bottom 22 ( It is pushed out toward the outer peripheral side through between the bottom surface 22a1). In addition, the circumferential rib 102 restricts the flow of the washing water positioned in the upper portion of the space Q10 to the outer peripheral side.

In addition, the washing water in the lower portion of the space Q11 positioned between the circumferential rib 101 and the circumferential rib 102 flows through the tip 101a of the circumferential rib 101 and the bottom portion 22a (bottom surface 22a1) as indicated by the outline arrow Y11. It is extruded to the outer peripheral side through between In addition, the circumferential rib 101 restricts the flow of the washing water positioned in the upper part of the space Q11 to the outer peripheral side.

In addition, part of the washing water positioned in the space Q12 positioned between the circumferential rib 101 and the drooping portion 3e enters the space Q10, Q11 together with the washing water from the spaces Q10 and Q11, as indicated by the white arrow Y12. 27 is pushed out. Also, the rest of the washing water is pushed into the washing tub 2 through the gap S between the agitating blade 100 and the circulation channel member 24 .

In the agitating blade 100 having such a shape, the circumferential ribs 101 and 102 formed at positions near the bottom surface 22a1 of the bottom plate 22 at the tips 101a and 102a reduce the flow rate of the washing water pushed out to the outer peripheral side. In addition, since a space Q12 facing both the gap S and the inlet 27 is formed toward the radially outer side (the side where the washing water is pushed out by centrifugal force), the space Q12 is formed from the gap S as indicated by the white arrow Y13. The flow rate of the wash water escaping increases, and the flow rate of the wash water flowing through the inlet 27 decreases as indicated by the outline arrow Y14.

On the other hand, in the present embodiment shown in FIG. 7A, the washing water in the lower part of the space Q1 positioned between the outermost annular rib 34 and the inner circumferential rib (circumferential rib) 37 is As indicated by the outline arrow Y1, it passes through between the tip 37a and the bottom portion 22a and is pushed out toward the outer peripheral side. In addition, the washing water in the upper portion of the space Q1 is pushed out to the outer peripheral side as an obliquely downward water flow by the inner peripheral ribs 37, as indicated by the outline arrow Y2.

In addition, the washing water in the lower part of the space Q2 located between the inner peripheral rib (circumferential rib) 36 and the inner peripheral rib (circumferential rib) 37 is, as indicated by the outline arrow Y3, the tip 36a and the It is pushed out to the outer peripheral side through between the bottom part 22a. In addition, the washing water in the upper portion of the space Q2 is pushed out to the outer peripheral side as an obliquely downward water flow by the inner peripheral ribs 36, as indicated by the white arrow Y4.

In addition, the washing water in the lower part of the space Q3 located between the inner peripheral rib (circumferential rib) 36 and the outer peripheral rib (circumferential rib) 35 is directed to the outer peripheral side as indicated by the outline arrow Y5. pushed out. In addition, the washing water in the upper part of the space Q3 is pushed out to the outer peripheral side as an obliquely downward water flow as indicated by the outline arrow Y6. Almost all of the washing water that has passed between the tip 35a of the outer peripheral rib 35 and the bottom surface 22a1 is pushed out to the inlet 27 as indicated by the outline arrow Y7.

In the washing machine 1 of this embodiment configured as described above, the tips 36a and 37a of the inner ribs 36 and 37 are formed at positions farther from the bottom surface 22a1 than the tips 35a of the outer peripheral ribs 35. The washing water in Q1 and Q2 can be pushed out to the outer peripheral side, a downward water flow can be generated, and almost the entire amount of the washing water in the spaces Q1 and Q2 can be pushed out to the outer peripheral side space Q3. As a result, in the present embodiment, it is possible to increase the amount of circulating water more than before without lowering the rigidity of the stirring blades 3 and without excessively increasing the rotation speed of the stirring blades 3 .

Further, in the present embodiment, the tip 35a of the outer peripheral rib 35 is located below the height Hm of the inlet 27 (see FIG. 5) (closer to the bottom surface 22a1). As a result, the washing water can be guided toward the bottom portion 22a, and the washing water that has crossed over from the outer circumferential rib 35 to the outer circumferential side can be easily introduced into the inlet 27, thereby increasing the flow rate of the washing water introduced into the circulating water passage R. can be made In addition, since the tip 35a of the outer peripheral rib 35 is positioned below the height Hm (see FIG. 5) of the inlet 27, the washing water that has flowed from the outer peripheral rib 35 to the outer peripheral side is immediately discharged into the inlet 27. It is possible to reduce the flow rate of the washing water that can be introduced and escapes from the gap S, as indicated by the white arrow Y8, as compared with the case of FIG. 7(b).

By the way, in this embodiment, when only the inner peripheral ribs (circumferential ribs) 36 and 37 are provided without providing the outer peripheral rib 35, the flow rate of the washing water flowing through the circulation water channel R is ), but the amount of washing water escaping from the gap S also increases. Therefore, in the present embodiment, not only the inner ribs 36 and 37 are provided as the circumferential ribs, but also the outer peripheral rib 35 is additionally provided, so that the flow rate of the washing water flowing through the circulation water path R is increased as shown in FIG. It is made to increase more than the case of b).

Further, in the present embodiment, the outer peripheral rib 35 is positioned on the outer peripheral end side (peripheral end) of the back blade 33 . As a result, the amount of washing water escaping from the gap S can be reduced, and the bending deformation of the back blade 33 can be suppressed, so the rigidity of the stirring blade 3 can be increased.

In this embodiment, the tips 36a and 37a of the inner ribs 36 and 37 are positioned closer to the bottom 22a toward the outer circumference. This makes it easier to guide the washing water downward as the washing water goes toward the outer circumference, so that more washing water can be easily introduced into the inlet 27 .

FIG. 8 shows an image diagram of shower diffusion, (a) of this embodiment and (b) of a comparative example. In both (a) and (b), illustration of the balance ring 23 is omitted.

A washing tub 120 as a comparative example shown in FIG. The upper plate 110a is provided toward the inner side of the . In the washing tub 120, in the configuration of FIG. 7(b), when the washing water is discharged, the diffusion angle of the washing water is restricted as indicated by the hatched area U10 in FIG. 8(b). Dispensed.

On the other hand, in the washing tub 2 of this embodiment shown in FIG. 8(a), the circulation flow rate of the washing tub 2 flowing through the circulation channel R is increased by the outer circumferential rib 35 and the inner circumferential ribs 36, 37. 8A, the diffusion angle of the washing water discharged from the discharge port 31 of the circulation channel member 24 can be increased as compared with FIG. 8B. . As a result, the washing water can be spread all over the laundry in the washing process and the rinsing process.

Further, in this embodiment, the circulating water path R is provided with an outlet 31 that opens upward, and the outlet 31 is arranged to face the lower surface 23 a of the balance ring 23 provided in the washing tub 2 . As a result, the upper plate 110a of the circulation channel member 110 shown in FIG. 8(b) can be eliminated, so that the wash water can be directly applied to the lower surface 23a of the balance ring 23, increasing the diffusion angle of the wash water.

In addition, in the present embodiment, since the amount of circulating water can be increased, the collection rate of foreign matter (lint) collected by the lint collecting member 26 can also be improved.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without changing the scope of the present invention. In the above-described embodiment, the case where the four circulation channel members 24 and 25 are provided has been described as an example, but one, two, three, five or more circulation channel members may be provided. There may be.

Further, in the present embodiment, the case where three circumferential ribs (the outer circumferential rib 35 and the inner circumferential ribs 36 and 37) are provided has been described as an example, but the number is not limited to three. For example, there may be two circumferential ribs (outer rib 35, inner rib), or four or more circumferential ribs (outer rib 35, three inner ribs). , can be changed as appropriate within a range that does not impair the rigidity of the stirring blade 3 .

In the present embodiment, the tip 36a of the inner rib 36 is located below the tip 37a of the inner rib 37. However, the tips 36a and 37a have the same length. It may be inner circumferential ribs 36 and 37 .

In addition, in the present embodiment, the shape of the stirring blades 3 is described as an example in which the shape is wavy along the circumferential direction, but the shape is not limited to such a shape. It can also be applied to stirring blades having a certain shape. Also in this case, by providing the outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37, it is possible to obtain the same effect as the present embodiment described above.

Another embodiment of the present invention will now be described. FIG. 9 shows a schematic diagram of an operation panel, in which (a) is the present embodiment, and (b) is a display example of a washing course of a conventional washing machine. It should be noted that (b) omits illustration of the operation panel 200 other than the display section. The operation panel 200 is roughly divided into a display section 201 on the top of the operation panel 200 and an operation section 202 on the bottom.

The operation unit 202 includes a power button 203 for turning on/off the power, a start switch 204 for starting or temporarily stopping the operation, a washing course button 205 for setting the washing operation course, and details of the washing operation. and a setting button 206 for setting. The display unit 201 is provided with a course display column 207 (208 in the conventional washing machine) for displaying the course of the washing operation.

During the washing operation, each time the washing course button 205 is pressed after the power button 203 is pressed, the lighting position of the course display column 207 is switched, and the washing course to be operated (standard course, fashionable course, dry course, etc.) is lit. , the operation of the selected washing course is started by pressing the start switch 204 .

10 to 12 are flow charts showing the details of the process operation of each washing course.

FIG. 10 shows the stroke operation of the cleaning method according to the standard course. FIG. 11 shows the stroke operation of the cleaning method relating to the dry course. FIG. 12 shows the process operation of the washing method relating to the fashionable course, which is the feature of this embodiment.

The control unit 19 is activated when the power button 203 is pressed to turn on the power, and executes the basic control processing program for washing shown in FIGS. 10 to 12 according to the selected course.

First, the stroke operation of the cleaning method according to the standard course of FIG. 10 will be described.

In step S301, the control unit 19 confirms the state of the washing machine 1 and performs initial setting.

In step S<b>302 , the control unit 19 sets the washing course according to the input instruction from the washing course button 205 . If there is no input instruction, the standard washing course or the last washing course is automatically set.

In step S<b>303 , the control unit 19 monitors the input of the start switch signal from the start switch 204 . If the control unit 19 determines that there is no input of the start switch signal, it repeats the process of step S303, and if it determines that there is input of the start switch signal, it proceeds to step S304.

In step S304, the control unit 19 executes detergent amount detection processing. This detergent amount detection process acts on the agitating blade 3 when the agitating blade 3 is rotated in one direction with the washing tub 2 stationary while the laundry is in a dry cloth state before the washing water is supplied. This is done by detecting the amount of laundry based on the amount of rotation load. The control unit 19 obtains an appropriate amount of detergent (amount of detergent) based on the detected amount of cloth. The amount of detergent is obtained by referring to a preset comparison table of the amount of cloth and the amount of detergent.

Also, when the amount of laundry is within a predetermined range (appropriate amount) of the amount of laundry, the amount of washing water (water level h1) is adjusted so that the water level does not exceed the stirring blade 3 and accumulates at the bottom of the outer tub 7, for example. set.

Further, the control unit 19 obtains and sets the washing time based on the detection result (the amount of laundry). If the amount of laundry is not detected, set the standard washing time.

In step S<b>305 , the control unit 19 displays the calculated amount of detergent on the display section 201 of the operation panel 200 .

In step S306, the control unit 19 opens a detergent water supply electromagnetic valve (not shown) to supply detergent to the detergent charging chamber of the detergent/finishing agent container (not shown). Before supplying the detergent, the user puts the indicated amount of powdered detergent into the detergent charging chamber of the detergent/finishing agent container (not shown), and then closes the lid 9b. The powdered detergent put into the detergent-filling chamber where the detergent water supply flows flows through the detergent/finishing agent container together with the detergent water supply and drops to the bottom of the outer tub 7 .

In step S307, the control unit 19 stops supplying the detergent after supplying the detergent up to the water level for dissolving the detergent. In this embodiment, the amount of detergent supplied is set to, for example, about 10 liters regardless of the amount of laundry (amount of clothes). This amount of water is sufficient to agitate the supplied water and detergent at the bottom of the washing tub 2 when the washing tub 2 is rotated in the detergent dissolving step (step S309), and the water surface is agitated. It is set so that it is lower than the height of the lower surface of the wing 3 (the laundry does not get wet before the detergent is dissolved). When this setting is completed, the supply of detergent is stopped (step S308).

In step S309, the control unit 19 integrally rotates the washing tub 2 and the stirring blades 3 in one direction at a slow speed (for example, about 70 revolutions per minute) to rotate the outer tub 7 on the bottom surface of the washing tub 2. Detergent dissolution is performed by agitating the detergent dissolving water and the powdered detergent supplied to the bottom to generate washing water with a high concentration of detergent. The detergent dissolving time is set to, for example, 1 minute. The dissolution rate is about 90% even under the conditions of low temperature (low water temperature) and hard-to-dissolve powder detergent. The detergent concentration in the wash water produced is about 7 times the standard concentration. Here, the standard concentration is, for example, a ratio of 20 grams of powder detergent/30 liters of washing water.

In step S310, a pre-process is performed. The control unit 19 detects the amount of laundry in the same manner as described above, and repeats supply of tap water (clear water) and high-concentration agitation until the set water level is reached. In the high-concentration agitation, the agitating blade 3 is rotated while the washing tub 2 is fixed (stirring mode) so that the generated detergent with a high detergent concentration is agitated and spreads over the laundry.

Then, in step S311, main washing is performed by rotating the stirring blade 3 with the washing tub 2 fixed (stirring mode) at the set water level for washing. The control unit 19 also rotates the stirring blades 3 in forward and reverse directions to perform uniform stirring for about one minute.

Thereafter, through the rinsing process (steps S312 and S313), the final dehydration process (step S314) is performed.

As described above, regarding the water flow pattern in the main washing, in the standard course, the washing tub 2 is fixed, and the stirring blade 3 is rotated left and right to generate a strong water flow in the washing tub 2, and the circulation water path. A high detergency is achieved by increasing the amount of washing water flowing into R.

Next, the case of the dry course will be explained with reference to FIG. 11, and only the differences from the case of the standard course of FIG. 10 will be explained.

In contrast to the operation of the standard course, the "detergent amount detection" in step S304 of FIG. 10 is abolished in the dry course. Further, the agitation operation when the amount of water is low, such as "detection of cloth amount" and "high-concentration agitation" in the previous process of step S310, is abolished (step S409).

In the dry course, in the main washing step of step S410, washing is performed in a mode (tank rotation mode) in which the washing tub 2 and the stirring blade 3 are integrally rotated in the same direction at a low speed (for example, about 50 rotations per minute). Execute. As a result, since the clothes and the washing liquid rotate in accordance with the rotation of the laundry, it is possible to prevent the laundry from rubbing against the stirring blades 3 and to wash the clothes while suppressing damage to the clothes, entanglement of the clothes, shrinkage and loss of shape. there is

However, in the dry course, unlike the standard course, the agitation blades 3 are rotated left and right to change the strong swirling water flow in the washing tub 2. Therefore, the clothes receive resistance from the water. It may be difficult and the cleaning efficiency may be poor. For example, since the laundry floats on the surface of the water, there is a possibility that the washing liquid will not penetrate the clothing sufficiently. Therefore, when carrying out the washing operation in the dry course. It is said that it is desirable to wash the clothes while physically holding down the clothes with a washing cap or the like that is put in the washing tub. In that case, the number of parts, such as a washing cap, will increase.

Next, referring to FIG. 12, the case of the fashionable course, which is the feature of this embodiment, will be explained. Moreover, it demonstrates, comparing with the dry course used as a prior art.

In contrast to the operation of the standard course, the "detergent amount detection" in step S304 of FIG. 10 is abolished in the fashionable course as in the dry course. Further, the agitation operation when the amount of water is low, such as "detection of cloth amount" and "high-concentration agitation" in the previous process of step S310, is abolished (step S509).

As described above, by abolishing the stirring operation when the water level is low, such as "detergent amount detection", "cloth amount detection", and "high concentration stirring", as in the dry course, rubbing between the laundry and the stirring blade 3 can be prevented. This makes it possible to wash clothes with less damage, entanglement, shrinkage, and loss of shape.

In addition, in the fashionable course, as in the dry course, in the main washing process (steps S510, S511, S512), washing is performed in a tank rotation mode in which the washing tank 2 and the stirring blade 3 are integrally rotated in the same direction. . In the main washing process, washing is performed by stepwise decreasing the number of revolutions of the washing tub 2 as the water level rises in three steps.

In the main washing 1 step of step S510, the washing tub 2 is rotated at the first rotation speed (for example, about 90 rpm) at the first water level (for example, about 45 L) supplied in the previous step of step S509. Perform washing in bath rotation mode. The water level and the number of revolutions are such that the water surface becomes mortar-shaped due to the spiral water flow (hereinafter referred to as eddy current) generated by rotating the washing tub 2, and the water level on the wall side of the washing tub 2 rises. However, even in this state, the rotation speed is set as high as possible within a range that does not exceed the predetermined upper limit of the water level. In addition, the stronger the vortex current, that is, the higher the number of revolutions of the washing tub 2, the greater the force that draws the clothes in the washing tub 2 downward, and the greater the effect of promoting the hydration of the clothes. Also, this first water level is higher than the standard course and the dry course.

Then, in the main washing 2 process of step S511, water is supplied to the second water level (for example, about 55 L), and the washing tub 2 is washed in the tub rotation mode that rotates at the second rotation speed (for example, about 60 rpm). to run. By supplying tap water (clear water) to the second water level, the tap water is directly poured onto the clothes in the washing tub that were not completely hydrated in the main washing step (step S510). It also has the effect of further promoting hydration. The second water level is higher than that of the standard course, and the water surface is shaped like a mortar due to the whirlpool, so that even if the water level in the center of the washing tub 2 is low, the entire clothes can be sufficiently placed in the washing tub. The height is set so that it can sink.

Furthermore, in the third step of main washing in step S512, water is supplied to the third water level (eg, 65 L), and the washing is performed in the tub rotation mode in which the washing tub 2 is rotated at the third rotation speed (eg, about 50 rpm). Execute. This number of rotations is set to the minimum number of rotations that can create a whirlpool in the washing tub 2 . If the number of rotations is lowered below this, eddy currents cannot be created, and there is a risk that the clothes will not be fully hydrated. In addition, the clothes will not receive resistance from the washing water, and the washing efficiency will deteriorate. In addition, the water level is higher than the water level of the standard course (equivalent to the delicate course).

In this way, in the main washing step 1 (step S510), by setting the number of rotations of the washing tub 2 as high as possible, the clothes in the washing tub 2 are pulled downward by the strong vortex current and water level change. , After promoting water content by creating an opportunity to make it easier to sink into the water, water is supplied to the washing tub 2 in the main washing 2 step and the main washing 3 step (steps S511 and S512) to gradually raise the water level. By reducing the number of rotations step by step while maintaining the whirlpool due to the number of rotations of the washing tub 2, the buoyancy of woolen clothes, etc., which was a problem of the conventional dry course, is high and the washing liquid contains water. To provide a user-friendly washing machine capable of washing clothes that are difficult to wash without using a washing cap to forcibly hold down the clothes. In addition, as in the dry course, the laundry and the washing liquid are washed in the tank rotation mode that rotates according to the rotation of the laundry. It enables washing that suppresses entanglement, shrinkage, and shape loss.

That is, in the fashionable course of the present invention, in the main washing process (washing process), the amount of water supplied from the water supply means to the washing tub 2 is increased step by step to raise the water level step by step. Along with this, the number of rotations of the washing tub 2 is lowered in stages to wash the clothes. To provide a washing machine which is easy to use without increasing the number of parts such as a washing cap for clothes which have high buoyancy and hardly absorb water in washing liquid while suppressing damage, entanglement and shrinkage of clothes.

FIG. 13 is a diagram showing the relationship between the number of revolutions of the washing tub 2 and the accompanying increase in water level. The change in the water level, which rises when washing, is shown for each number of revolutions of the washing tub 2. FIG. Here, description will be made using the water level of the fashionable clothes course and the number of revolutions of the washing tub, which are features of this embodiment.

The symbol (A) indicates the water level when the washing tub 2 rotates at the first water level in the main washing step 1 (step S510), and the number of rotations according to the water level is within a range not exceeding the predetermined water level upper limit. is rotated at the highest possible number of revolutions (the number of revolutions corresponding to the water level), that is, the first number of revolutions.

The symbol (B) indicates the water level when the washing tub 2 is rotated at the second water level in the main washing 2 step (step S511), and is rotated at the second number of rotations in the same way as described above. The symbol (C) indicates the water level when the washing tub 2 is rotated at the third water level in the third main washing process (step S512), and is rotated at the third rotation speed.

In addition, the number of rotations of the washing tub 2 at the first water level in the main washing 1 step (step S510) of symbol (A) is as high as possible within a range that does not exceed the predetermined water level upper limit, that is, the first number of rotations. By rotating at , a stronger eddy current can be generated than at the second and third rotation speeds, so that the force of drawing the clothes in the washing tub 2 downward can be exerted to the maximum, so that the clothes are promoted to absorb water. becomes possible.

FIG. 14 is a diagram comparing the change in the water level in the washing tub and the change in the rotation speed of the washing tub with respect to the elapsed time in the washing process between the dry course and the fashionable course. ) indicates the change in rotation speed. At this time, it is assumed that the load of laundry is the same for each course. In addition, in FIG. 14(b), the standard course, which is a stirring mode in which the stirring blade 3 is rotated, is excluded from comparison because the washing method is different from the fashionable course and dry course in the tank rotation mode, in which the washing tank 2 is rotated. .

As shown in FIGS. 14(a) and 14(b), in the main washing of the fashionable clothes course, the set water level is set to three levels, and as the water level rises, the number of rotations of the washing tub 2 is lowered step by step. running Specifically, the fashionable course of the present invention is the first stage (symbol (A) (D)), and a second step of rotating the washing tub 2 at a second rotation speed lower than the first rotation speed while supplying water to a second water level higher than the first water level (symbols (B) and (E)); A third step (symbols (C) and (F)) of rotating the washing tub 2 at a third rotation speed lower than the second rotation speed while supplying water to a third water level higher than the second water level is executed.

Although not shown in detail, when switching from the first rotation speed to the second rotation speed between the symbols (D) and (E), the water supply operation is performed from the first water level to the second water level. , After rotating at the first rotation speed, after stopping the rotation for a predetermined time, the rotation speed of the washing tub 2 is rotated at a predetermined low speed (for example, about 35 rotations per minute), and the washing tub is kept at the second water level. Water is supplied while tap water is evenly sprinkled over the clothes inside 2, and after water supply is completed up to a second water level, the washing tub 2 is rotated at a second number of revolutions. After that, similarly to the time from the first rotation speed to the second rotation speed, after stopping the rotation of the washing tub 2 for a predetermined time, the washing tub 2 is rotated at a low speed, water supply is started up to the third water level, and the rotation speed is switched to the third rotation speed.

The reason for this is that if the water is supplied while the first rotation of the high-speed rotation (for example, about 90 rotations per minute) is applied, when the water falls on the clothes in the washing tub 2, the water is repelled by the centrifugal force caused by the rotation of the washing tub 2. This is because there is a risk that the water may splash and adhere to the lid 9b (FIG. 1) for opening and closing the laundry inlet 9a. The rotation of the washing tub 2 from the first stage to the third stage is performed in one direction for a predetermined time and at a predetermined number of rotations, and then stopped for a predetermined time when switching to the next stage, and then stopped for a predetermined time. After that, it is rotated in the other direction for a predetermined time at a predetermined number of revolutions. That is, when switching from the first step to the second step and from the second step to the third step, the rotation is switched to the next step after stopping for a predetermined time. In this way, by stopping the rotation of the washing tub 2 for a predetermined time when switching between stages, it is possible to suppress the load on the motor, which is the driving device, and suppress the temperature rise of the motor.
The set water level for washing in the fashionable course is set to be higher than the set water level for washing in the standard course and the dry course. By rotating the washing tub 2 at the first number of revolutions indicated by symbol (D), which can generate a strong eddy current, the clothes can sink into the water in the washing tub 2 even if a force is applied to draw the clothes downward into the water. Since the water level required for washing can be secured sufficiently, there is no need to use a washing cap to forcibly hold down the clothes, and it is possible to wash the clothes while efficiently promoting the water absorption of the clothes.

FIG. 15 is a diagram showing the relationship between the movement of the washing tub 2 and the movement of clothes in this embodiment. As shown in FIG. 15( a ), for example, clothes made of wool or the like float on the surface of the water if the rotation of the washing tub 2 is stopped even during washing. It does not contain water, so it is difficult to secure detergency. By rotating the washing tub 2 as shown in FIGS. 15(b) to 15(e), the washing water in the washing tub 2 causes a swirling flow, and the water surface becomes mortar-shaped. This water flow draws the clothes in the washing tub 2 downward, making it possible to moisten the clothes.

However, as shown in FIG. 15B, in the case of the dry course, after supplying water to the set water level, the washing tub 2 is rotated at a low speed (for example, about 50 rotations per minute) until the end of the main washing process. The force for drawing the clothes in the tub 2 downward is weak, and there is a risk that the clothes will not be fully hydrated and the washing process will end.

Therefore, as shown in FIGS. 15(c) to 15(e), in the fashionable clothes course of the present embodiment, in which the washing tub 2 is rotated at the highest possible number of revolutions within a range that does not exceed the predetermined upper limit of the water level, the setting The water level is set to three levels, and as the water level rises, the number of revolutions of the washing tub 2 is lowered step by step to perform washing, thereby eliminating the need to forcibly hold down the clothes using a washing cap. , it is possible to wash the clothes while efficiently promoting the water content of the clothes.

In addition, in the above-mentioned fashion course, an example of washing at a higher set water level than in the standard course was explained, but the set water level was set to the same as in the standard course, and the three main washing steps were not performed, thereby promoting the moisture content of the clothes. In order to maintain this, the washing time of the main washing 2 step may be lengthened. As a result, while suppressing damage to the clothes, entanglement, shrinkage, and loss of shape, the washing cap is used to forcibly hold down the clothes such as wool clothes that have high buoyancy and do not easily absorb water in the washing liquid. To provide a convenient washing machine capable of washing without turning on.

1 washing machine 2 washing tub 3 stirring blade 21 body plate 22 bottom plate 22a bottom 22a1 bottom 22b side 23 balance ring 23 lower surface of balance ring 24 circulation channel member 25 circulation channel member 24b1 flange 27 inlet 31 outlet 33 back blade 35 Outer Rib 35a Tip of Outer Rib 36 Inner Rib 37 Inner Rib

Claims (4)

A washing process, a rinsing process, comprising: a washing tub; an agitating blade provided at the bottom of the washing tub; a driving device for rotationally driving the washing tub and the agitating blade; , a washing machine that performs a dehydration process,
A circulation channel for circulating the water at the bottom of the washing tub by sprinkling it in the washing tub,
In the washing step, the amount of water supplied from the water supply means to the washing tub is increased stepwise to raise the water level stepwise, and the number of revolutions of the washing tub is stepwise increased as the water level rises. has a course to wash clothes by lowering to
The stirring blade has a first inner peripheral rib, a second inner peripheral rib, and an outermost outer peripheral rib on the back surface side, respectively, and
The first inner rib, the second inner rib, and the outer rib are located on the outer peripheral side of the half radius of the stirring blade,
Each tip of the first inner rib and the second inner rib is located above the tip of the outer rib, and the tip of the first inner rib is located above the second inner rib. Located below the tip of the circumferential rib,
The tip of the outer peripheral rib is located above a position half the height of the inlet of the circulation channel and below the height of the inlet.
A washing machine characterized by: The washing machine according to claim 1,
The washing machine, wherein the number of rotations of the washing tub is set to the number of rotations corresponding to the water level so as not to exceed a predetermined water level upper limit value. The washing machine according to claim 1,
The course includes:
a first step of rotating the washing tub at a predetermined first rotation speed after supplying water to a predetermined first water level;
a second step of rotating the washing tub at a second rotation speed lower than the first rotation speed while supplying water to a second water level higher than the first water level;
a third step of rotating the washing tub at a third rotation speed lower than the second rotation speed while supplying water to a third water level higher than the second water level;
with a washing machine. The washing machine according to claim 3,
The rotation of the washing tub from the first step to the third step is performed in one direction for a predetermined time at a predetermined number of rotations, then stopped for the predetermined time, and after stopping for the predetermined time, rotated in the other direction for a predetermined time. A washing machine that is rotated at a predetermined number of revolutions for a period of time.

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