JP2911358B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 55-26908 discloses a configuration in which a washing and dewatering tub having an open upper surface is disposed in an outer tub having an open upper surface. A washing machine for supplying water toward the center of the washing / dewatering tub through the upper opening of each of these tubs is shown.

[0003] However, in such a water supply method, for example, after performing washing and dehydration, dehydration and rinsing cannot be performed satisfactorily.

That is, in the dehydration before the dehydration and rinsing, the laundry sticks to the inner surface of the side wall of the washing and dewatering tub. On the other hand, in the dehydration rinsing, dehydration is performed by supplying water to the washing and dewatering tub only for a limited time for which water soaks into the entire laundry, and after that time, stopping the water supply and rotating the washing and dehydrating tub at a high speed. This dehydration removes the detergent together with the water and performs rinsing. In this dehydration rinsing, it is only necessary to supply water to such an extent that water permeates the laundry, and the amount of water used can be suppressed, and water can be saved.

Therefore, although water is supplied only for a limited time so that the water permeates the laundry, most of the water flows down toward the center of the washing and dewatering tub, so that the side wall of the washing and dewatering tub is provided. The laundry that sticks to the inner surface does not hang much, and even if dehydration is performed in this state, the detergent cannot be sufficiently spattered with water. Therefore, satisfactory dehydration rinsing cannot be performed.

[0006]

[0007]

[0008]

SUMMARY OF THE INVENTION The present invention is to provide a washing machine capable of satisfying the dehydration rinsing without deficiency when performing dehydration rinsing after dehydration following washing, for example. It is assumed that.

[0009]

SUMMARY OF THE INVENTION The present invention provides an outer tub having an open upper surface, and a high-speed rotation centered on a rotating shaft provided in the outer tub, which is disposed in the outer tub and provided on a bottom wall when dewatering from laundry. A washing and dewatering tub having an open upper surface, a water supply pipe for supplying water to the washing and dewatering tub from above the outer tub and the washing and dewatering tub through the upper surface openings of these tubs, and connected to the water supply pipe;
Drain the water flowing through the water pipe into the washing and dewatering tub
A water port is provided, inside the side wall of the washing and dewatering tub by dehydration.
Above to soak the water in the laundry stuck to the surface
Water supply operation to supply water to the washing and dewatering tub, and detergent in the laundry
To remove with the water soaked in the laundry
And a dehydrating operation of rotating the dehydrating tank at high speed.
In a washing machine that performs rinsing,
The water that comes out of the water supply pipe is used for washing and dewatering.
A water flow direction changing body directed toward the inner surface of the side wall of the tank;
During the water supply operation of the dehydration rinse,
To soak the water in the whole laundry sticking to the surface
Washing and spinning at a lower speed than the rotation speed in the spinning operation
And a control unit for rotating the tank.

[0010]

[0011]

[0012]

According to the constitution of the present invention , in the dehydration rinsing,
During the water supply operation, water flowing out of the water supply pipe will
It goes to the inside of the side wall of the washing and dewatering tub by use. This
The laundry is washed by the dehydration performed before the rinse.
Even if it sticks to the inner surface of the side wall of the dewatering tank, water is good for laundry.
Hang over. Therefore, the water will soak into the laundry and dehydrate
Suggi is performed satisfactorily. In addition, washing and removing during water supply operation
The aquarium rotates at a lower speed than during the subsequent spin-dry operation.
Therefore, the laundry spreads all around the inner surface of the side wall of the washing and spin-drying tub.
Even if it is stuck (usually like this), laundry
Water spreads well throughout, making dehydration rinsing even more satisfying
Done in

[0013]

[0014]

[0015]

[0016]

[0017]

FIG. 1 shows the structure of a fully automatic washing machine according to an embodiment of the present invention. Reference numeral 1 denotes a machine frame, and 2 denotes an outer tank having an open upper surface, which is suspended and supported in the machine frame 1 by four hanging rods (not shown). Reference numeral 3 denotes a washing and dewatering tub having a plurality of dehydrating holes 4 around the periphery and disposed in the outer tub 2 and also having an open upper surface. The washing and dehydrating tub 3 is provided with a rotating shaft 5 provided on a bottom wall.
Rotate around. Reference numeral 6 denotes a rotating blade rotatably disposed at the bottom of the washing and dewatering tub 3. Reference numeral 7 denotes a drive motor connected to the washing and dewatering tub 3 and the rotating wing 6 via a power transmission mechanism 8. The drive motor 7 rotates only the rotating blade 6 at a low speed during washing and normal rinsing (for rinsing and pouring water), and rotates the washing and spin-drying tub 3 at the time of spinning of the laundry (including spinning during spinning). 5 is rotated in one direction at high speed (at this time, the rotating blade 6 also rotates at high speed at the same time). Reference numeral 9 denotes a water supply pipe which drops water from above the outer tub 2 and the washing and dewatering tub 3 to the washing and dewatering tub 3 through upper openings of these tubs, and 10 denotes an electromagnetic water supply provided in the middle of the water supply pipe 9. A valve 11 is a drainage pipe provided on the bottom wall of the outer tub 2, and 12 is an electromagnetic drainage valve provided in the middle of the drainage pipe 11. Reference numeral 13 denotes a water level sensor connected via a pressure hose 15 to an air trap 14 at the bottom of the outer tub 2. The water level sensor 13 detects the water level in the washing and dewatering tub 3, and supplies the water to the washing and dewatering tub 3. You can see the amount of water drained.

Reference numeral 16 denotes a water outlet of the water supply pipe 9. As shown in detail in FIG. 2, the water outlet 16 includes a water passage 18 having a large number of small holes 17 in a lower wall, and a concave portion 19 located below the water passage 18. Reference numeral 20 denotes a detergent container which is mounted in the recess 19 of the water outlet 16 so as to be able to be taken in and out from the front, and which is also shown in detail in FIG. A rear wall opening 21 is provided in a lower portion of the rear wall of the detergent container 20, and a gap 22 exists between the detergent container 20 and the lower wall of the concave portion 19 when the detergent container 20 is mounted on the concave portion 19. . The gap 22 communicates with the detergent container 20 via the rear wall opening 21. Reference numeral 23 denotes a handle used to pull out the detergent container 20 for introducing detergent. The handle 23 is formed integrally with the detergent container 20. Reference numeral 24 denotes a water discharge direction changing body formed integrally with the detergent container 20 behind the handle 23. The water discharge direction change body 24 is provided in the water outlet 16 when the detergent container 20 is mounted. . The water discharge direction changing member 24 has an inclined shape approaching the side wall of the washing and dewatering tub 3 as it descends, and has an arc shape substantially concentric with the side wall of the washing and dewatering tub 3 as shown in FIG.

When the detergent is previously charged into the detergent container 20 at the time of washing, and the detergent container 20 is mounted in the recess 19, the water supply valve 10 is opened.
Tap water that has passed through the water supply pipe 9 reaches the water outlet 16. Then, the tap water drops from the water passage 18 through the small holes 17 into the detergent container 20, and the detergent container 2
0 through the rear wall opening 21 together with the detergent in the gap 22.
It flows to. Thereafter, the tap water containing the detergent, that is, the washing water, flows out of the water outlet 16 from the front of the gap 22 and is supplied to the washing and dewatering tub 3.

During rinsing (for rinsing, rinsing with water, rinsing with water, rinsing with dehydration), the detergent container 20 is attached to the recess 19 with all the detergent flowing out during washing. When the water supply valve 10 is opened, the tap water reaches the water outlet 16 and falls from the water passage 18 into the detergent container 20 through the small hole 17 as described above. But,
Since no detergent is present in the detergent container 20, the tap water flows into the gap 22 through the rear wall opening 21 as it is, and the water outlet 16
It goes out and is supplied to the washing and dewatering tub 3.

The water coming out of the water outlet 16 of the water supply pipe 9 and supplied to the washing and dewatering tub 3 is supplied to the water discharge direction changing body 24.
In other words, according to the inclination and the arc shape of the water discharge direction changing body 24, the water is slightly expanded from the water discharge port portion 16 into an arc shape as shown by a dotted portion W in FIG. Fall). The solid line A in FIG. 1 shows the falling path of water at this time.

FIG. 5 shows a block circuit of the washing machine. 25
Is a control unit composed of a microcomputer that controls the washing machine. The control unit 25 controls the drive of the drive motor 7, the electromagnetic water supply valve 10, and the electromagnetic drain valve 12 based on a key input signal from the key input unit 26, a detection result of the water level sensor 13, and the like.

FIG. 6 shows a basic operation procedure of the washing machine.
The control unit 25 first executes a washing step, then sequentially executes a dehydration rinsing step and a normal rinsing step (for rinsing), and finally executes a dehydrating step.

FIG. 7 shows the flow of a program incorporated in the control unit 25. Hereinafter, the operation of the washing machine will be described with reference to FIG. When a start key signal arrives based on the operation of the start key on the key input unit 26, the control unit 2
5 starts operation, and first executes a washing process. In this washing process, the control unit 25 opens the water supply valve 10 to supply water until the water level sensor 13 detects a predetermined water level (until a predetermined amount of water is accumulated in the washing and dewatering tub 3) ( S1 step). At this time, the washing water is supplied to the washing and dewatering tub 3 as described above, since the detergent has been charged in the detergent container 20 in advance at the time of washing. Then, when the predetermined water level is detected, the water supply valve 10 is closed. Then, when a predetermined amount of water is accumulated, the control unit 25 rotates only the rotary wing 6 at low speed under the drive of the drive motor 7, whereby washing is performed (Step S2).

When the washing step is completed, the control unit 25 executes a dehydration rinsing step. In the dehydration and rinsing step, first, the drain valve 12 is opened to discharge the washing water at the time of washing, and the washing and dewatering tub 3 is rotated at high speed together with the rotary blades 6 to dehydrate the laundry (S3 step). When this is completed, dehydration rinsing is performed (Step S4). The drain valve 12 maintains the open state.

That is, referring to FIG. 8, during a predetermined time t, the control unit 25 opens the water supply valve 10 to supply water. During the water supply, the control unit 25 controls the drive motor 7
Is repeated for 1 second drive-stop for 5 seconds. At this time, when the washing and dewatering tub 3 tries to rise to the high-speed rotation state together with the rotary blade 6, the washing and dehydration tub 3 repeatedly enters the inertia rotation state immediately. After all, the washing and dewatering tub 3 rotates slowly.

Therefore, water is supplied while the washing and dewatering tub 3 rotates slowly. In this case, even if the laundry C sticks to the inner surface of the side wall of the washing and dewatering tub 3 due to the dehydration in the S3 step immediately after the washing, the water is discharged from the water discharge direction changing body 24.
In other words, according to the action of i.e., according to the inclination and the arc shape of the water discharge direction changing body 24, the water spreads slightly toward the inner surface of the side wall of the washing and dewatering tub 3 while slightly expanding in an arc shape as described above. Go out. When the time t elapses, the state is such that the water has sufficiently penetrated.

Thereafter, the water supply valve 10 is closed, and the control unit 25 drives the drive motor 7 for a predetermined time (for example, 5 minutes),
The washing and dewatering tub 3 is rotated at a high speed to perform dehydration. This causes the detergent to be blown away with the well soaked water.

Assuming that the above-described flow of supplying water while rotating the washing and dewatering tub 3 slowly and then dewatering is one cycle, two cycles are executed in the dehydration rinsing in step S4. In this case, even when the laundry is supplied with water in the second cycle, even if the laundry C sticks to the inner surface of the side wall of the washing and dewatering tub 3 due to the dehydration in the first cycle, the water likewise well penetrates the laundry and soaks. .

In the water supply in each cycle of the dehydration and rinsing, the water soaks well into the laundry, and the dehydration and rinsing can be performed satisfactorily without shortage. In addition, the laundry C hit by water and containing water easily falls down inside the washing and dewatering tub 3 or actually falls down, and then the laundry C sticks to the inner surface of the side wall of the washing and dewatering tub 3. The part is exposed and the part is directly flooded with water, so that the water permeates the laundry better and the dewatering and rinsing is performed more satisfactorily.

Further, since the water discharge direction changing member 24 is formed in an arc shape which is substantially concentric with the side wall of the washing and dewatering tub 3, the water is formed in an arc shape along the inner surface of the circular side wall of the washing and dewatering tub 3. Therefore, the water hangs better on the laundry C attached to the inner surface of the side wall of the washing and dewatering tub 3, and the laundry easily falls down on the inside of the washing and dewatering tub 3, or actually falls down well.

Further, in the case of water supply during the dewatering and rinsing, the washing and dewatering tub 3 rotates at a low speed, and therefore, even if the laundry C sticks over the entire circumference of the inner surface of the side wall of the washing and dewatering tub 3 (normally, The same situation occurs when the whole laundry is covered with water as described above, and the dehydration rinsing is performed more satisfactorily.

When the dehydrating and rinsing step is completed, the control unit 25 subsequently executes a normal rinsing step. In this step, as in the case of the washing step, the controller 25 opens the water supply valve 10 and supplies tap water from the tap until the water level sensor 13 detects the predetermined water level (S5 step). . The drain valve 12 is closed in advance just before the dehydration rinsing step. When the predetermined water level is detected,
The water supply valve 10 is closed. Then, when a predetermined amount of water is accumulated, the control unit 25 rotates only the rotary wing 6 under the drive of the drive motor 7, thereby performing the rinse (step S6).

For this reason, even in rinsing, similarly, when water is supplied, the water well penetrates the laundry and soaks. The laundry that has hit and contains water easily falls down or actually falls into the inside of the washing and dewatering tub 3. Even if it sticks to the inner surface, this sticking is considerably eliminated. Therefore, in the actual rinsing stage, the movement of the laundry is good from the beginning, and the rinsing is performed satisfactorily.

Further, since the water discharge direction changing body 24 is formed in an arc shape which is substantially concentric with the side wall of the washing and dewatering tub 3, the water is formed in an arc shape along the inner surface of the circular side wall of the washing and dewatering tub 3. Therefore, the water is better applied to the laundry stuck to the inner surface of the side wall of the washing and dewatering tub 3, and the sticking of the laundry is further eliminated.

Furthermore, in the case of water supply during the washing and dewatering, when the washing and dewatering tub 3 rotates at a low speed in the same manner as in the dehydrating and rinsing, the laundry sticks over the entire inner surface of the side wall of the washing and dewatering tub 3. However (usually this is the case), the whole laundry is covered with water, and the laundry is less likely to stick.

When the normal rinsing step is completed, the control unit 25 finally executes a dehydrating step. In the dehydration step, first, the drain valve 12 is opened to discharge the water during the rinsing (step S7). When drainage is completed, the control unit 2
In step 5, the washing / dewatering tub 3 is rotated at a high speed, and dehydration is executed (S8 step). The drain valve 12 maintains the open state.
The operation ends when the dehydration step ends.

In the above embodiment, the rinsing is usually performed in the rinsing step. However, instead of the rinsing, water rinsing may be performed.

[0039]

According to washing machines of the present invention, the dehydration rinsing
Change the direction of water flowing out of the water supply pipe
To the inner surface of the side wall of the washing and dewatering tub
The dehydration performed before the dehydration rinse.
Even if the laundry sticks to the inside of the side wall of the washing and dewatering tub,
Water often hangs on the laundry. So the water is good for the laundry
Incorporation and dehydration rinsing are performed satisfactorily. In addition, water supply
At the time of cropping, the washing and dewatering tub is
Is rotated at a low speed,
It sticks around the entire inner surface of the side wall of the dewatering tank
The whole laundry is well watered, and the dehydration and rinsing are satisfied
Can be done.

[0040]

[0041]

[Brief description of the drawings]

FIG. 1 is a sectional view of a fully automatic washing machine according to an embodiment of the present invention.

FIG. 2 is a sectional view near a water outlet of a water supply pipe of the washing machine.

FIG. 3 is a perspective view of a detergent container of the washing machine.

FIG. 4 is a plan sectional view showing a relationship between a water discharge direction changing body of the washing machine and a washing and dewatering tub.

FIG. 5 is a block circuit diagram of the washing machine.

FIG. 6 is a sequence diagram showing a basic operation procedure of the washing machine.

FIG. 7 is a flowchart of a program incorporated in a control unit of the washing machine.

FIG. 8 is a timing chart showing a drive timing of a main part during dehydration rinsing of the washing machine.

[Explanation of symbols]

 2 Outer tub 3 Washing and dewatering tub 7 Drive motor 9 Water supply pipe 10 Electromagnetic water supply valve 16 Water outlet 20 Detergent container 24 Water discharge direction changing body 25 Controller

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D06F 39/08 301 D06F 33/02 D06F 41/00

Claims (1)

(57) [Claims] 1. An outer tub having an open upper surface, and a washing / unloading device having an open upper surface, which is disposed in the outer tub and rotates at a high speed about a rotation axis provided on a bottom wall when dewatering from the laundry. A water tub, a water supply pipe for supplying water to the washing and dewatering tub from above the outer tub and the washing and dewatering tub through upper openings of these tubs, and water flowing through the water supply pipe connected to the water supply pipe.
It has a water outlet that flows out to the washing and dewatering tub.
For the laundry stuck to the inner surface of the side wall of the washing and dewatering tub
Supply water into the washing and dewatering tub to soak the water
The water supply operation and the water that has absorbed the detergent in the laundry
The washing and dewatering tub is rotated at high speed to remove both.
Water operation and dehydration in order
And provided in connection with the water outlet, and emerged from the water supply pipe.
Water is directed to the inside of the side wall of the washing and dewatering tub.
During the water supply operation of the water direction change body and the dehydration rinse,
Water is applied to the entire laundry stuck on the inner surface of the side wall of the washing and spin-drying tub.
In order to impregnate
A washing machine provided with a control unit for rotating the washing and dewatering tub at a low speed .